package project

import (
	"bytes"
	"errors"
	"fmt"
	"os"
	"path/filepath"
	"reflect"
	"slices"
	"strings"
	"testing"
)

func TestLoadYAMLConfig(t *testing.T) {
	root := t.TempDir()
	writeProjectFile(t, filepath.Join(root, ConfigFile), `
module:
  name: Test Module
  resref: testmod
paths:
  source: src
  assets: assets
  build: output
haks:
  - name: core
    priority: 1
    max_bytes: 1024
    split: false
    include:
      - core/**
`)

	proj, err := Load(root)
	if err != nil {
		t.Fatalf("Load returned error: %v", err)
	}
	if proj.ConfigSource.Name != ConfigFile || proj.ConfigSource.Format != "yaml" || proj.ConfigSource.Legacy {
		t.Fatalf("unexpected config source: %#v", proj.ConfigSource)
	}
	if got, want := proj.Config.Module.Name, "Test Module"; got != want {
		t.Fatalf("expected module name %q, got %q", want, got)
	}
	if got, want := proj.BuildDir(), filepath.Join(root, "output"); got != want {
		t.Fatalf("expected build dir %s, got %s", want, got)
	}
}

func TestEffectiveConfigReportsConfiguredAndDefaultProvenance(t *testing.T) {
	root := t.TempDir()
	writeProjectFile(t, filepath.Join(root, ConfigFile), `
module:
  name: Test Module
  resref: testmod
paths:
  source: src
`)

	proj, err := Load(root)
	if err != nil {
		t.Fatalf("Load returned error: %v", err)
	}

	effective := proj.EffectiveConfig()
	for _, field := range []string{"module.name", "paths.build"} {
		if strings.TrimSpace(effective.Provenance[field].Source) == "" {
			t.Errorf("expected %s to report provenance", field)
		}
	}
	if effective.Module.Name != "Test Module" {
		t.Fatalf("configured module name was not preserved: %q", effective.Module.Name)
	}
}

func TestEffectiveConfigHonorsValidationConfig(t *testing.T) {
	root := t.TempDir()
	writeProjectFile(t, filepath.Join(root, ConfigFile), `
module:
  name: Test Module
  resref: testmod
paths:
  source: src
validation:
  builtin_script_prefixes:
    - custom_
    - NW_
  required_fields:
    ifo:
      - Mod_Name
      - Mod_Hak
`)

	proj, err := Load(root)
	if err != nil {
		t.Fatalf("Load returned error: %v", err)
	}
	effective := proj.EffectiveConfig()
	for _, prefix := range []string{"custom_", "nw_"} {
		if !slices.Contains(effective.Validation.BuiltinScriptPrefixes, prefix) {
			t.Errorf("configured validation prefixes missing %q: %#v", prefix, effective.Validation.BuiltinScriptPrefixes)
		}
	}
	for _, field := range []string{"Mod_Hak", "Mod_Name"} {
		if !slices.Contains(effective.Validation.RequiredFields["ifo"], field) {
			t.Errorf("configured required fields missing %q: %#v", field, effective.Validation.RequiredFields)
		}
	}
}

func TestEffectiveConfigIncludesTopDataValueEncodings(t *testing.T) {
	root := t.TempDir()
	writeProjectFile(t, filepath.Join(root, ConfigFile), `
module:
  name: Test Module
  resref: testmod
topdata:
  source: topdata
  value_encodings:
    - dataset: racialtypes/core
      column: AvailableSkinColors
      mode: packed_hex_list
      min: 0
      max: 175
      hex_width: 2
`)

	proj, err := Load(root)
	if err != nil {
		t.Fatalf("Load returned error: %v", err)
	}

	encodings := proj.EffectiveConfig().TopData.ValueEncodings
	if len(encodings) != 1 {
		t.Fatalf("expected one topdata value encoding, got %#v", encodings)
	}
	got := encodings[0]
	if got.Dataset != "racialtypes/core" ||
		got.Column != "AvailableSkinColors" ||
		got.Mode != "packed_hex_list" ||
		got.Min != 0 ||
		got.Max != 175 ||
		got.HexWidth != 2 {
		t.Fatalf("unexpected topdata value encoding: %#v", got)
	}
}

func TestEffectiveConfigIncludesTopDataValueDefaults(t *testing.T) {
	root := t.TempDir()
	writeProjectFile(t, filepath.Join(root, ConfigFile), `
module:
  name: Test Module
  resref: testmod
topdata:
  source: topdata
  value_defaults:
    - dataset: racialtypes/core
      column: ECL
      value: 0
`)

	proj, err := Load(root)
	if err != nil {
		t.Fatalf("Load returned error: %v", err)
	}

	defaults := proj.EffectiveConfig().TopData.ValueDefaults
	if len(defaults) != 1 {
		t.Fatalf("expected one topdata value default, got %#v", defaults)
	}
	got := defaults[0]
	if got.Dataset != "racialtypes/core" || got.Column != "ECL" || got.Value != 0 {
		t.Fatalf("unexpected topdata value default: %#v", got)
	}
}

func TestEffectiveConfigIncludesTopDataRowGeneration(t *testing.T) {
	root := t.TempDir()
	writeProjectFile(t, filepath.Join(root, ConfigFile), `
module:
  name: Test Module
  resref: testmod
topdata:
  source: topdata
  row_generation:
    - namespace: portraits
      mode: first_null_row
      minimum_row: 15000
`)

	proj, err := Load(root)
	if err != nil {
		t.Fatalf("Load returned error: %v", err)
	}

	rules := proj.EffectiveConfig().TopData.RowGeneration
	if len(rules) != 1 {
		t.Fatalf("expected one topdata row generation rule, got %#v", rules)
	}
	got := rules[0]
	if got.Dataset != "portraits" || got.Namespace != "portraits" || got.Mode != "first_null_row" || got.MinimumRow != 15000 {
		t.Fatalf("unexpected topdata row generation rule: %#v", got)
	}
}

func TestEffectiveConfigIncludesTopDataRowExtensions(t *testing.T) {
	root := t.TempDir()
	writeProjectFile(t, filepath.Join(root, ConfigFile), `
module:
  name: Test Module
  resref: testmod
topdata:
  source: topdata
  row_extensions:
    - dataset: classes/spellsgained/*
      mode: repeat_last
      level_column: Level
      target_level: 60
`)

	proj, err := Load(root)
	if err != nil {
		t.Fatalf("Load returned error: %v", err)
	}

	rules := proj.EffectiveConfig().TopData.RowExtensions
	if len(rules) != 1 {
		t.Fatalf("expected one topdata row extension rule, got %#v", rules)
	}
	got := rules[0]
	if got.Dataset != "classes/spellsgained/*" || got.Mode != "repeat_last" || got.LevelColumn != "Level" || got.TargetLevel != 60 {
		t.Fatalf("unexpected topdata row extension rule: %#v", got)
	}
}

func TestEffectiveConfigIncludesTopDataClassFeatInjections(t *testing.T) {
	root := t.TempDir()
	writeProjectFile(t, filepath.Join(root, ConfigFile), `
module:
  name: Test Module
  resref: testmod
topdata:
  source: topdata
  class_feat_injections:
    global_feats:
      - feat: feat:literate
        list: 3
        granted_on_level: 1
        on_menu: 0
        unless_present: [feat:illiterate]
    class_skill_masterfeats:
      - masterfeat: masterfeats:skillfocus
        list: 1
        granted_on_level: -1
        on_menu: 0
`)

	proj, err := Load(root)
	if err != nil {
		t.Fatalf("Load returned error: %v", err)
	}

	injections := proj.EffectiveConfig().TopData.ClassFeatInjections
	if len(injections.GlobalFeats) != 1 || len(injections.ClassSkillMasterfeats) != 1 {
		t.Fatalf("expected configured class feat injections, got %#v", injections)
	}
	if got := injections.GlobalFeats[0]; got.Feat != "feat:literate" || got.List != "3" || got.GrantedOnLevel != "1" || got.OnMenu != "0" || len(got.UnlessPresent) != 1 || got.UnlessPresent[0] != "feat:illiterate" {
		t.Fatalf("unexpected global class feat injection: %#v", got)
	}
	if got := injections.ClassSkillMasterfeats[0]; got.Masterfeat != "masterfeats:skillfocus" || got.List != "1" || got.GrantedOnLevel != "-1" || got.OnMenu != "0" {
		t.Fatalf("unexpected class skill masterfeat injection: %#v", got)
	}
}

func TestValidateLayoutRejectsInvalidTopDataValueEncodings(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "topdata"))
	mkdirAll(t, filepath.Join(root, "build"))

	proj := &Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "test"},
			Paths:  PathConfig{Build: "build"},
			TopData: TopDataConfig{
				Source: "topdata",
				ValueEncodings: []TopDataValueEncodingConfig{
					{Dataset: "racialtypes/core", Column: "AvailableSkinColors", Mode: "packed_hex_list", Min: 0, Max: 256, HexWidth: 2},
					{Dataset: "racialtypes/core", Column: "AvailableSkinColors", Mode: "packed_hex_list", Min: 0, Max: 175, HexWidth: 2},
					{Dataset: "", Column: "AvailableHeadsMale", Mode: "unknown", Min: -1, Max: 999, HexWidth: 0},
				},
				ValueDefaults: []TopDataValueDefaultConfig{
					{Dataset: "racialtypes/core", Column: "ECL", Value: 0},
					{Dataset: "racialtypes/core", Column: "ECL", Value: 1},
					{Dataset: "", Column: "", Value: 0},
				},
				RowGeneration: []TopDataRowGenerationConfig{
					{Dataset: "portraits", Mode: "first_null_row"},
					{Dataset: "portraits", Mode: "after_base"},
					{Namespace: "placeabletypes", Mode: "unsupported"},
					{Mode: "first_null_row"},
					{Dataset: "classes", Mode: "first_null_row", MinimumRow: -1},
				},
				RowExtensions: []TopDataRowExtensionConfig{
					{Dataset: "classes/spellsgained/*", Mode: "repeat_last", LevelColumn: "Level", TargetLevel: 60},
					{Dataset: "classes/spellsgained/*", Mode: "repeat_last", LevelColumn: "Level", TargetLevel: 60},
					{Dataset: "", Mode: "unsupported", LevelColumn: "", TargetLevel: 0},
				},
			},
		},
	}

	err := proj.ValidateLayout()
	if err == nil {
		t.Fatal("expected invalid topdata value encoding validation error")
	}
	text := err.Error()
	for _, want := range []string{
		"topdata.value_encodings[0].max does not fit in hex_width 2",
		"topdata.value_encodings[1] duplicates an earlier dataset/column encoding",
		"topdata.value_encodings[2].dataset is required",
		"topdata.value_encodings[2].mode \"unknown\" is not supported",
		"topdata.value_encodings[2].min must be zero or greater",
		"topdata.value_encodings[2].hex_width must be greater than zero",
		"topdata.value_defaults[1] duplicates an earlier dataset/column default",
		"topdata.value_defaults[2].dataset is required",
		"topdata.value_defaults[2].column is required",
		"topdata.row_generation[1] duplicates an earlier dataset row generation rule",
		"topdata.row_generation[2].mode \"unsupported\" is not supported",
		"topdata.row_generation[3].dataset is required",
		"topdata.row_generation[4].minimum_row must be zero or greater",
		"topdata.row_extensions[1] duplicates an earlier dataset row extension rule",
		"topdata.row_extensions[2].dataset is required",
		"topdata.row_extensions[2].mode \"unsupported\" is not supported",
		"topdata.row_extensions[2].level_column is required",
		"topdata.row_extensions[2].target_level must be greater than zero",
	} {
		if !strings.Contains(text, want) {
			t.Fatalf("expected validation error %q, got %v", want, err)
		}
	}
}

func TestValidateLayoutRejectsInvalidTopDataClassFeatInjections(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "topdata"))
	mkdirAll(t, filepath.Join(root, "build"))

	proj := &Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "test"},
			Paths:  PathConfig{Build: "build"},
			TopData: TopDataConfig{
				Source: "topdata",
				ClassFeatInjections: TopDataClassFeatInjectionConfig{
					GlobalFeats: []TopDataClassFeatGlobalRule{
						{Feat: "literate", List: "3", GrantedOnLevel: "1", OnMenu: "0", UnlessPresent: []string{"illiterate"}},
						{Feat: "feat:valid", List: "", GrantedOnLevel: "x", OnMenu: "0"},
					},
					ClassSkillMasterfeats: []TopDataClassFeatMasterfeatRule{
						{Masterfeat: "skillfocus", List: "1", GrantedOnLevel: "-1", OnMenu: ""},
					},
				},
			},
		},
	}

	err := proj.ValidateLayout()
	if err == nil {
		t.Fatal("expected invalid class feat injection validation error")
	}
	text := err.Error()
	for _, want := range []string{
		"topdata.class_feat_injections.global_feats[0].feat",
		"topdata.class_feat_injections.global_feats[0].unless_present[0]",
		"topdata.class_feat_injections.global_feats[1].list",
		"topdata.class_feat_injections.global_feats[1].granted_on_level",
		"topdata.class_feat_injections.class_skill_masterfeats[0].masterfeat",
		"topdata.class_feat_injections.class_skill_masterfeats[0].on_menu",
	} {
		if !strings.Contains(text, want) {
			t.Fatalf("expected validation error %q, got %v", want, err)
		}
	}
}

func TestDefaultAssetExtensionsKeepAuthoredBMUWithoutConversionSources(t *testing.T) {
	for _, extension := range []string{".bmu", ".wav"} {
		if !slices.Contains(AssetExtensions, extension) {
			t.Errorf("default asset extensions must retain %s", extension)
		}
	}
	for _, extension := range []string{".mp3", ".ogg"} {
		if slices.Contains(AssetExtensions, extension) {
			t.Errorf("default asset extensions must not include conversion source %s", extension)
		}
	}
}

func TestLoadRejectsRemovedMusicConfig(t *testing.T) {
	root := t.TempDir()
	writeProjectFile(t, filepath.Join(root, ConfigFile), `
module:
  name: Test Module
  resref: testmod
music:
  datasets: {}
`)
	if _, err := Load(root); err == nil || !strings.Contains(err.Error(), "music") {
		t.Fatalf("expected strict YAML decoding to reject removed music config, got %v", err)
	}
}

func TestEffectiveConfigHonorsConfiguredOutputAndCacheFields(t *testing.T) {
	root := t.TempDir()
	writeProjectFile(t, filepath.Join(root, ConfigFile), `
module:
  name: Test Module
  resref: testmod
paths:
  build: output
  cache: cache
outputs:
  module_archive: modules/{module.resref}.mod
  hak_manifest: manifests/haks.json
  hak_archive: haks/{hak.name}.hak
topdata:
  source: topdata
  build: "{paths.cache}"
  compiled_2da_dir: tables
  compiled_tlk: dialog.tlk
  package_hak: custom_top.hak
  package_tlk: custom_dialog.tlk
  wiki:
    output_root: docs
    pages_dir: pages
    state_file: wiki-state.json
    page_index_file: manifest/page-index.json
    source: docs-src/wiki
    data_file: providers/wiki-data.yaml
    page_paths_file: paths/wiki-paths.yaml
    page_templates_dir: page-fragments
    manual_sections_file: sections/defaults.yaml
autogen:
  cache:
    root: "{paths.cache}/autogen"
`)

	proj, err := Load(root)
	if err != nil {
		t.Fatalf("Load returned error: %v", err)
	}

	if got, want := proj.ModuleArchivePath(), filepath.Join(root, "output", "modules", "testmod.mod"); got != want {
		t.Fatalf("expected module archive path %s, got %s", want, got)
	}
	if got, want := proj.HAKManifestPath(), filepath.Join(root, "output", "manifests", "haks.json"); got != want {
		t.Fatalf("expected HAK manifest path %s, got %s", want, got)
	}
	if got, want := proj.HAKArchivePath("core_01"), filepath.Join(root, "output", "haks", "core_01.hak"); got != want {
		t.Fatalf("expected HAK archive path %s, got %s", want, got)
	}
	if got, want := proj.TopDataCompiled2DADir(), filepath.Join(root, "cache", "tables"); got != want {
		t.Fatalf("expected topdata 2da path %s, got %s", want, got)
	}
	if got, want := proj.TopDataWikiStatePath(), filepath.Join(root, "cache", "docs", "wiki-state.json"); got != want {
		t.Fatalf("expected wiki state path %s, got %s", want, got)
	}
	if got, want := proj.TopDataWikiPageIndexPath(), filepath.Join(root, "cache", "docs", "manifest", "page-index.json"); got != want {
		t.Fatalf("expected wiki page-index path %s, got %s", want, got)
	}
	if got, want := proj.TopDataWikiDataPath(), filepath.Join(root, "docs-src", "wiki", "providers", "wiki-data.yaml"); got != want {
		t.Fatalf("expected wiki data path %s, got %s", want, got)
	}
	if got, want := proj.TopDataWikiPagePathsPath(), filepath.Join(root, "docs-src", "wiki", "paths", "wiki-paths.yaml"); got != want {
		t.Fatalf("expected wiki page paths path %s, got %s", want, got)
	}
	if got, want := proj.TopDataWikiPageTemplatesDir(), filepath.Join(root, "docs-src", "wiki", "page-fragments"); got != want {
		t.Fatalf("expected wiki page template path %s, got %s", want, got)
	}
	if got, want := proj.TopDataWikiManualSectionsPath(), filepath.Join(root, "docs-src", "wiki", "sections", "defaults.yaml"); got != want {
		t.Fatalf("expected wiki manual sections path %s, got %s", want, got)
	}
	if got, want := proj.AutogenCachePath("manifest.json"), filepath.Join(root, "cache", "autogen", "manifest.json"); got != want {
		t.Fatalf("expected autogen cache path %s, got %s", want, got)
	}
}

func TestEffectiveConfigHonorsConfiguredExtractWikiAndAutogenPolicy(t *testing.T) {
	root := t.TempDir()
	writeProjectFile(t, filepath.Join(root, ConfigFile), `
module:
  name: Test Module
  resref: testmod
paths:
  source: src
  tools: custom-tools
extract:
  layout: nwn_canonical_json
  hak_discovery: configured_haks
  cleanup_stale: false
  merge:
    gff_json:
      - target: module/module.ifo.json
        preserve_fields:
          - Mod_Entry_Area
        merge_lists:
          - field: Mod_Area_list
            key_field: Area_Name
            strategy: preserve_existing_order_append_new
topdata:
  wiki:
    source: topdata/wiki
    managed_namespaces:
      - skills
    renderer: nodebb_tiptap_html
    link_strategy: preserve_westgate_wiki_links
    namespaces_file: namespaces.yaml
    tables_file: custom-tables.yaml
    visibility_file: visibility.yaml
    templates_dir: templates
    manual_sections_dir: manual-sections
    deploy_manifest: wiki-manifest.json
    deploy_edit_summary: Custom summary
    title_prefix_min_length: 4
    status_pages: false
    status_listing_scope: namespace
    stale_pages:
      default: report
      live_cleanup: archive
autogen:
  cache:
    root: "{paths.cache}/released"
    max_age: 30m
    refresh_env: TEST_AUTOGEN_REFRESH
  release_source:
    provider: gitea
    server_url_env: TEST_ASSETS_SERVER
    repo_env: TEST_ASSETS_REPO
`)

	proj, err := Load(root)
	if err != nil {
		t.Fatalf("Load returned error: %v", err)
	}
	effective := proj.EffectiveConfig()
	if got, want := effective.Extract.HAKDiscovery, "configured_haks"; got != want {
		t.Fatalf("expected extract hak discovery %q, got %q", want, got)
	}
	if effective.Extract.CleanupStale == nil || *effective.Extract.CleanupStale {
		t.Fatalf("expected cleanup_stale false, got %#v", effective.Extract.CleanupStale)
	}
	if got, want := len(effective.Extract.Merge.GFFJSON), 1; got != want {
		t.Fatalf("expected %d gff json merge rule, got %d", want, got)
	}
	rule := effective.Extract.Merge.GFFJSON[0]
	if got, want := rule.Target, "module/module.ifo.json"; got != want {
		t.Fatalf("expected merge target %q, got %q", want, got)
	}
	if got, want := rule.PreserveFields, []string{"Mod_Entry_Area"}; !reflect.DeepEqual(got, want) {
		t.Fatalf("expected preserve fields %#v, got %#v", want, got)
	}
	if got, want := rule.MergeLists[0].Strategy, "preserve_existing_order_append_new"; got != want {
		t.Fatalf("expected merge list strategy %q, got %q", want, got)
	}
	if got, want := effective.TopData.Wiki.DeployManifest, "wiki-manifest.json"; got != want {
		t.Fatalf("expected wiki deploy manifest %q, got %q", want, got)
	}
	if got, want := effective.TopData.Wiki.Source, "topdata/wiki"; got != want {
		t.Fatalf("expected wiki source %q, got %q", want, got)
	}
	if got, want := effective.TopData.Wiki.Renderer, "nodebb_tiptap_html"; got != want {
		t.Fatalf("expected wiki renderer %q, got %q", want, got)
	}
	if got, want := effective.TopData.Wiki.LinkStrategy, "preserve_westgate_wiki_links"; got != want {
		t.Fatalf("expected wiki link strategy %q, got %q", want, got)
	}
	if got, want := effective.TopData.Wiki.NamespacesFile, "namespaces.yaml"; got != want {
		t.Fatalf("expected wiki namespaces file %q, got %q", want, got)
	}
	if got, want := effective.TopData.Wiki.TablesFile, "custom-tables.yaml"; got != want {
		t.Fatalf("expected wiki tables file %q, got %q", want, got)
	}
	if got, want := effective.TopData.Wiki.VisibilityFile, "visibility.yaml"; got != want {
		t.Fatalf("expected wiki visibility file %q, got %q", want, got)
	}
	if got, want := effective.TopData.Wiki.TemplatesDir, "templates"; got != want {
		t.Fatalf("expected wiki templates dir %q, got %q", want, got)
	}
	if got, want := effective.TopData.Wiki.ManualSectionsDir, "manual-sections"; got != want {
		t.Fatalf("expected wiki manual sections dir %q, got %q", want, got)
	}
	if got, want := effective.TopData.Wiki.StalePages.Default, "report"; got != want {
		t.Fatalf("expected wiki stale default %q, got %q", want, got)
	}
	if got, want := effective.TopData.Wiki.StalePages.LiveCleanup, "archive"; got != want {
		t.Fatalf("expected wiki stale live cleanup %q, got %q", want, got)
	}
	if got, want := effective.TopData.Wiki.TitlePrefixMinLength, 4; got != want {
		t.Fatalf("expected wiki title prefix minimum length %d, got %d", want, got)
	}
	if effective.TopData.Wiki.StatusPages == nil || *effective.TopData.Wiki.StatusPages {
		t.Fatalf("expected wiki status pages to be disabled, got %#v", effective.TopData.Wiki.StatusPages)
	}
	if got, want := effective.TopData.Wiki.StatusListingScope, "namespace"; got != want {
		t.Fatalf("expected wiki status listing scope %q, got %q", want, got)
	}
	if got, want := effective.Autogen.Cache.MaxAge, "30m"; got != want {
		t.Fatalf("expected autogen cache max age %q, got %q", want, got)
	}
	if got, want := proj.AutogenRefreshEnv(), "TEST_AUTOGEN_REFRESH"; got != want {
		t.Fatalf("expected autogen refresh env %q, got %q", want, got)
	}
}

func TestProjectValidationAcceptsWikiStalePurgePolicy(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "src"))
	mkdirAll(t, filepath.Join(root, "build"))
	writeProjectFile(t, filepath.Join(root, ConfigFile), `
module:
  name: Test Module
  resref: testmod
paths:
  source: src
  build: build
topdata:
  wiki:
    stale_pages:
      default: report
      live_cleanup: purge
`)

	proj, err := Load(root)
	if err != nil {
		t.Fatalf("load project: %v", err)
	}
	if err := proj.ValidateLayout(); err != nil {
		t.Fatalf("validate purge stale policy: %v", err)
	}
}

func TestProjectValidationRejectsUnsupportedWikiStalePolicies(t *testing.T) {
	for _, policy := range []string{"unpublish", "remove-everything"} {
		t.Run(policy, func(t *testing.T) {
			root := t.TempDir()
			mkdirAll(t, filepath.Join(root, "src"))
			mkdirAll(t, filepath.Join(root, "build"))
			writeProjectFile(t, filepath.Join(root, ConfigFile), fmt.Sprintf(`
module:
  name: Test Module
  resref: testmod
paths:
  source: src
  build: build
topdata:
  wiki:
    stale_pages:
      live_cleanup: %s
`, policy))

			proj, err := Load(root)
			if err != nil {
				t.Fatalf("load project: %v", err)
			}
			err = proj.ValidateLayout()
			if err == nil || !strings.Contains(err.Error(), policy) {
				t.Fatalf("expected %q stale policy validation failure, got %v", policy, err)
			}
		})
	}
}

func TestValidateLayoutRejectsInvalidExtractMergeRules(t *testing.T) {
	tests := []struct {
		name    string
		config  string
		wantErr string
	}{
		{
			name: "empty target",
			config: `
extract:
  merge:
    gff_json:
      - target: ""
        preserve_fields: [Mod_Entry_Area]
`,
			wantErr: "extract.merge.gff_json[0].target must not be empty",
		},
		{
			name: "duplicate target",
			config: `
extract:
  merge:
    gff_json:
      - target: module/module.ifo.json
      - target: module/module.ifo.json
`,
			wantErr: "extract.merge.gff_json target \"module/module.ifo.json\" is configured more than once",
		},
		{
			name: "empty merge list field",
			config: `
extract:
  merge:
    gff_json:
      - target: module/module.ifo.json
        merge_lists:
          - field: ""
            key_field: Area_Name
            strategy: preserve_existing_order_append_new
`,
			wantErr: "extract.merge.gff_json[0].merge_lists[0].field must not be empty",
		},
		{
			name: "unsupported strategy",
			config: `
extract:
  merge:
    gff_json:
      - target: module/module.ifo.json
        merge_lists:
          - field: Mod_Area_list
            key_field: Area_Name
            strategy: replace
`,
			wantErr: "extract.merge.gff_json[0].merge_lists[0].strategy \"replace\" is not supported",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			root := t.TempDir()
			writeProjectFile(t, filepath.Join(root, ConfigFile), `
module:
  name: Test Module
  resref: testmod
paths:
  source: src
  build: build
`+tt.config)

			proj, err := Load(root)
			if err != nil {
				t.Fatalf("Load returned error: %v", err)
			}
			err = proj.ValidateLayout()
			if err == nil {
				t.Fatalf("expected validation error containing %q", tt.wantErr)
			}
			if !strings.Contains(err.Error(), tt.wantErr) {
				t.Fatalf("expected validation error containing %q, got %v", tt.wantErr, err)
			}
		})
	}
}

func TestActiveOverridesAreVisibleAndSensitiveValuesAreMasked(t *testing.T) {
	root := t.TempDir()
	writeProjectFile(t, filepath.Join(root, ConfigFile), `
module:
  name: Test Module
  resref: testmod
paths:
  source: src
`)
	t.Setenv("SOW_BUILD_HAKS_KEEP_EXISTING", "1")
	t.Setenv("NODEBB_API_TOKEN", "secret-token")

	proj, err := Load(root)
	if err != nil {
		t.Fatalf("Load returned error: %v", err)
	}
	overrides := proj.ActiveOverrides()
	var sawKeepExisting, sawMaskedToken bool
	for _, override := range overrides {
		if override.Key == "build.keep_existing_haks" && override.Value == "1" {
			sawKeepExisting = true
		}
		if override.Key == "wiki.token" && override.Value == "<set>" {
			sawMaskedToken = true
		}
	}
	if !sawKeepExisting {
		t.Fatalf("expected build keep existing override in %#v", overrides)
	}
	if !sawMaskedToken {
		t.Fatalf("expected masked wiki token override in %#v", overrides)
	}
}

func TestEffectiveConfigJSONIsDeterministic(t *testing.T) {
	root := t.TempDir()
	writeProjectFile(t, filepath.Join(root, ConfigFile), `
module:
  name: Test Module
  resref: testmod
paths:
  source: src
`)

	proj, err := Load(root)
	if err != nil {
		t.Fatalf("Load returned error: %v", err)
	}
	first, err := proj.EffectiveConfigJSON()
	if err != nil {
		t.Fatalf("EffectiveConfigJSON returned error: %v", err)
	}
	second, err := proj.EffectiveConfigJSON()
	if err != nil {
		t.Fatalf("EffectiveConfigJSON returned error: %v", err)
	}
	if !bytes.Equal(first, second) {
		t.Fatalf("effective config JSON is not deterministic")
	}
	if !bytes.Contains(first, []byte(`"name": "Test Module"`)) {
		t.Fatalf("effective config JSON missing configured module name: %s", first)
	}
}

func TestLoadYMLConfig(t *testing.T) {
	root := t.TempDir()
	writeProjectFile(t, filepath.Join(root, ConfigFileYML), `
module:
  name: Test Module
  resref: testmod
paths:
  source: src
  build: build
`)

	proj, err := Load(root)
	if err != nil {
		t.Fatalf("Load returned error: %v", err)
	}
	if proj.ConfigSource.Name != ConfigFileYML || proj.ConfigSource.Format != "yaml" || proj.ConfigSource.Legacy {
		t.Fatalf("unexpected config source: %#v", proj.ConfigSource)
	}
}

func TestLoadLegacyJSONConfig(t *testing.T) {
	root := t.TempDir()
	writeProjectFile(t, filepath.Join(root, LegacyConfigFile), `{
  "module": {
    "name": "Legacy Module",
    "resref": "legacy"
  },
  "paths": {
    "source": "src",
    "build": "build"
  }
}`+"\n")

	proj, err := Load(root)
	if err != nil {
		t.Fatalf("Load returned error: %v", err)
	}
	if proj.ConfigSource.Name != LegacyConfigFile || proj.ConfigSource.Format != "json" || !proj.ConfigSource.Legacy {
		t.Fatalf("unexpected config source: %#v", proj.ConfigSource)
	}
}

func TestLoadPrefersYAMLOverLegacyJSON(t *testing.T) {
	root := t.TempDir()
	writeProjectFile(t, filepath.Join(root, LegacyConfigFile), `{
  "module": {
    "name": "Legacy Module",
    "resref": "legacy"
  }
}`+"\n")
	writeProjectFile(t, filepath.Join(root, ConfigFile), `
module:
  name: YAML Module
  resref: yamlmod
paths:
  source: src
  build: build
`)

	proj, err := Load(root)
	if err != nil {
		t.Fatalf("Load returned error: %v", err)
	}
	if proj.ConfigSource.Name != ConfigFile {
		t.Fatalf("expected YAML config to win, got %#v", proj.ConfigSource)
	}
	if got, want := proj.Config.Module.ResRef, "yamlmod"; got != want {
		t.Fatalf("expected resref %q, got %q", want, got)
	}
}

func TestLoadRejectsMalformedYAML(t *testing.T) {
	root := t.TempDir()
	writeProjectFile(t, filepath.Join(root, ConfigFile), "module:\n  name: Test\n    resref: bad\n")

	if _, err := Load(root); err == nil {
		t.Fatal("expected malformed YAML error")
	}
}

func TestLoadRejectsUnknownYAMLFields(t *testing.T) {
	root := t.TempDir()
	writeProjectFile(t, filepath.Join(root, ConfigFile), `
module:
  name: Test Module
  resref: testmod
paths:
  source: src
  build: build
unexpected: true
`)

	err := loadAndValidate(root)
	if err == nil {
		t.Fatal("expected unknown field error")
	}
	if !strings.Contains(err.Error(), "field unexpected not found") {
		t.Fatalf("expected unknown field error, got %v", err)
	}
}

func TestFindRootUsesYAMLConfig(t *testing.T) {
	root := t.TempDir()
	child := filepath.Join(root, "nested", "dir")
	mkdirAll(t, child)
	writeProjectFile(t, filepath.Join(root, ConfigFile), "module:\n  name: Test\n  resref: test\n")

	got, err := FindRoot(child)
	if err != nil {
		t.Fatalf("FindRoot returned error: %v", err)
	}
	if got != root {
		t.Fatalf("expected root %s, got %s", root, got)
	}
}

func TestTopDataAssetsDirPrefersExplicitConfig(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "src"))
	mkdirAll(t, filepath.Join(root, "assets"))
	mkdirAll(t, filepath.Join(root, "build"))
	mkdirAll(t, filepath.Join(root, "custom-assets"))

	proj := &Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "test"},
			Paths:  PathConfig{Source: "src", Assets: "assets", Build: "build"},
			TopData: TopDataConfig{
				Assets: "custom-assets",
			},
		},
	}

	result := proj.TopDataAssetsDir()
	expected := filepath.Join(root, "custom-assets")
	if result != expected {
		t.Errorf("expected %s, got %s", expected, result)
	}
}

func TestTopDataAssetsDirDoesNotAssumeSiblingRepo(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "src"))
	mkdirAll(t, filepath.Join(root, "assets"))
	mkdirAll(t, filepath.Join(root, "build"))

	parentDir := filepath.Dir(root)
	siblingPath := filepath.Join(parentDir, "sow-assets")
	mkdirAll(t, siblingPath)
	mkdirAll(t, filepath.Join(siblingPath, "assets", "part", "belt"))

	proj := &Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "test"},
			Paths:  PathConfig{Source: "src", Assets: "assets", Build: "build"},
			TopData: TopDataConfig{
				Assets: "sow-assets",
			},
		},
	}

	result := proj.TopDataAssetsDir()
	expected := filepath.Join(root, "sow-assets")
	if result != expected {
		t.Errorf("expected unresolved local path %s, got %s", expected, result)
	}
}

func TestTopDataAssetsDirReturnsEmptyForNoConfig(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "src"))
	mkdirAll(t, filepath.Join(root, "assets"))
	mkdirAll(t, filepath.Join(root, "build"))

	proj := &Project{
		Root: root,
		Config: Config{
			Module:  ModuleConfig{Name: "Test", ResRef: "test"},
			Paths:   PathConfig{Source: "src", Assets: "assets", Build: "build"},
			TopData: TopDataConfig{},
		},
	}

	result := proj.TopDataAssetsDir()
	if result != "" {
		t.Errorf("expected empty string, got %s", result)
	}
}

func TestModuleArchivePathUsesConfiguredBuildDirAndResRef(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "output"))

	proj := &Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "testmod"},
			Paths:  PathConfig{Build: "output"},
		},
	}

	got := proj.ModuleArchivePath()
	want := filepath.Join(root, "output", "testmod.mod")
	if got != want {
		t.Fatalf("expected %s, got %s", want, got)
	}
}

func TestHAKPathsUseConfiguredBuildDir(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "output"))

	proj := &Project{
		Root: root,
		Config: Config{
			Paths: PathConfig{Build: "output"},
		},
	}

	if got, want := proj.HAKManifestPath(), filepath.Join(root, "output", "haks.json"); got != want {
		t.Fatalf("expected manifest path %s, got %s", want, got)
	}
	if got, want := proj.HAKArchivePath("core_01"), filepath.Join(root, "output", "core_01.hak"); got != want {
		t.Fatalf("expected hak path %s, got %s", want, got)
	}
}

func TestTopDataPackagePathsUseConfiguredNamesAndBuildDir(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "output"))

	proj := &Project{
		Root: root,
		Config: Config{
			Paths: PathConfig{Build: "output"},
			TopData: TopDataConfig{
				PackageHAK: "custom_top.hak",
				PackageTLK: "custom_dialog.tlk",
			},
		},
	}

	if got, want := proj.TopDataPackageHAKPath(), filepath.Join(root, "output", "custom_top.hak"); got != want {
		t.Fatalf("expected top hak path %s, got %s", want, got)
	}
	if got, want := proj.TopDataPackageTLKPath(), filepath.Join(root, "output", "custom_dialog.tlk"); got != want {
		t.Fatalf("expected top tlk path %s, got %s", want, got)
	}
}

func TestValidateLayoutAllowsMissingAssetsDir(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "src"))
	mkdirAll(t, filepath.Join(root, "build"))

	proj := &Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "test"},
			Paths:  PathConfig{Source: "src", Assets: "assets", Build: "build"},
		},
	}

	if err := proj.ValidateLayout(); err != nil {
		t.Fatalf("ValidateLayout returned error: %v", err)
	}
	if _, err := os.Stat(filepath.Join(root, "assets")); !errors.Is(err, os.ErrNotExist) {
		t.Fatalf("expected missing assets dir to remain absent, got err=%v", err)
	}
}

// paths.build is an OUTPUT dir the builder creates (MkdirAll) before writing, so
// a bare clone with no build dir yet must still validate/build with no pre-step
// (R2/parity). Only a build path that exists but is not a directory is an error.
func TestValidateLayoutAllowsMissingBuildDir(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "src"))
	// deliberately do NOT create build/

	proj := &Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "test"},
			Paths:  PathConfig{Source: "src", Build: "build"},
		},
	}

	if err := proj.ValidateLayout(); err != nil {
		t.Fatalf("ValidateLayout returned error for missing build dir: %v", err)
	}
	if _, err := os.Stat(filepath.Join(root, "build")); !errors.Is(err, os.ErrNotExist) {
		t.Fatalf("expected missing build dir to remain absent, got err=%v", err)
	}
}

// A build path that exists but is a regular file is still a hard error.
func TestValidateLayoutRejectsBuildDirThatIsAFile(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "src"))
	if err := os.WriteFile(filepath.Join(root, "build"), []byte("i am a file, not a dir"), 0o644); err != nil {
		t.Fatal(err)
	}

	proj := &Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "test"},
			Paths:  PathConfig{Source: "src", Build: "build"},
		},
	}

	err := proj.ValidateLayout()
	if err == nil || !strings.Contains(err.Error(), "paths.build must be a directory") {
		t.Fatalf("expected paths.build-must-be-a-directory error, got %v", err)
	}
}

func TestValidateLayoutRejectsInvalidTopDataPackageOutputNames(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "src"))
	mkdirAll(t, filepath.Join(root, "build"))

	proj := &Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "test"},
			Paths:  PathConfig{Source: "src", Build: "build"},
			TopData: TopDataConfig{
				Source:     "topdata",
				PackageHAK: "nested/custom_top.hak",
				PackageTLK: "custom_dialog.txt",
			},
		},
	}

	err := proj.ValidateLayout()
	if err == nil {
		t.Fatal("expected topdata output validation error")
	}
	if !strings.Contains(err.Error(), "topdata.package_hak") {
		t.Fatalf("expected package_hak validation error, got %v", err)
	}
	if !strings.Contains(err.Error(), "topdata.package_tlk") {
		t.Fatalf("expected package_tlk validation error, got %v", err)
	}
}

func TestValidateLayoutRejectsUnsafeGeneratedOutputPaths(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "src"))
	mkdirAll(t, filepath.Join(root, "build"))

	proj := &Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "test"},
			Paths:  PathConfig{Source: "src", Build: "build"},
			Outputs: OutputConfig{
				HAKManifest: "../haks.json",
			},
			TopData: TopDataConfig{
				Source:         "topdata",
				Compiled2DADir: "../2da",
			},
		},
	}

	err := proj.ValidateLayout()
	if err == nil {
		t.Fatal("expected unsafe output path validation error")
	}
	if !strings.Contains(err.Error(), "outputs.hak_manifest") {
		t.Fatalf("expected HAK manifest path validation error, got %v", err)
	}
	if !strings.Contains(err.Error(), "topdata.compiled_2da_dir") {
		t.Fatalf("expected topdata path validation error, got %v", err)
	}
}

func TestValidateLayoutRejectsInvalidTopDataWikiConfig(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "src"))
	mkdirAll(t, filepath.Join(root, "build"))

	proj := &Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "test"},
			Paths:  PathConfig{Source: "src", Build: "build"},
			TopData: TopDataConfig{
				Source: "topdata",
				Wiki: TopDataWikiConfig{
					Source:             "../wiki",
					Renderer:           "dokuwiki",
					LinkStrategy:       "rewrite_links",
					StatusListingScope: "global",
					NamespacesFile:     "../namespaces.yaml",
					TablesFile:         "../tables.yaml",
					VisibilityFile:     "../visibility.yaml",
					TemplatesDir:       ".",
					DataFile:           "../data.yaml",
					PagePathsFile:      "../wiki.yaml",
					PageTemplatesDir:   "../templates/pages",
					ManualSectionsFile: "../manual/default.yaml",
					PageIndexFile:      "../page-index.json",
					ManualSectionsDir:  "../manual",
					AlignmentLinks: TopDataWikiAlignmentLinks{
						LinkFormat: "raw_url",
					},
					StalePages: TopDataWikiStalePagesConfig{
						Default:     "delete",
						LiveCleanup: "delete",
					},
				},
			},
		},
	}

	err := proj.ValidateLayout()
	if err == nil {
		t.Fatal("expected invalid wiki config validation error")
	}
	for _, needle := range []string{
		"topdata.wiki.source",
		"topdata.wiki.renderer",
		"topdata.wiki.link_strategy",
		"topdata.wiki.status_listing_scope",
		"topdata.wiki.namespaces_file",
		"topdata.wiki.tables_file",
		"topdata.wiki.visibility_file",
		"topdata.wiki.templates_dir",
		"topdata.wiki.data_file",
		"topdata.wiki.page_paths_file",
		"topdata.wiki.page_templates_dir",
		"topdata.wiki.manual_sections_file",
		"topdata.wiki.page_index_file",
		"topdata.wiki.manual_sections_dir",
		"topdata.wiki.alignment_links.link_format",
		"topdata.wiki.stale_pages.default",
		"topdata.wiki.stale_pages.live_cleanup",
	} {
		if !strings.Contains(err.Error(), needle) {
			t.Fatalf("expected validation error to mention %s, got %v", needle, err)
		}
	}
}

func TestValidateLayoutRejectsRootSourceAndAssetPaths(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "build"))

	proj := &Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "test"},
			Paths:  PathConfig{Source: ".", Assets: ".", Build: "build"},
		},
	}

	err := proj.ValidateLayout()
	if err == nil {
		t.Fatal("expected root source and asset path validation error")
	}
	if !strings.Contains(err.Error(), "paths.source") {
		t.Fatalf("expected source path validation error, got %v", err)
	}
	if !strings.Contains(err.Error(), "paths.assets") {
		t.Fatalf("expected assets path validation error, got %v", err)
	}
}

func TestValidateLayoutRejectsInvalidAutogenConsumerConfig(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "src"))
	mkdirAll(t, filepath.Join(root, "build"))

	proj := &Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "test"},
			Paths:  PathConfig{Source: "src", Build: "build"},
			Autogen: AutogenConfig{
				Consumers: []AutogenConsumerConfig{
					{
						ID:       "accessory_visualeffects",
						Producer: "accessory_visualeffects",
						Dataset:  "visualeffects",
						Mode:     "unsupported",
						Root:     "vfxs",
						Include:  []string{"head_accessories/**/*.mdl"},
						Derive:   AutogenDeriveConfig{Kind: "model_stem", GroupFrom: "first_path_segment"},
						Manifest: AutogenManifestConfig{
							ReleaseTag: "head-vfx-manifest-current",
							AssetName:  "nested/sow-accessory-vfx-manifest.json",
							CacheName:  "sow-accessory-vfx-manifest.txt",
						},
					},
				},
			},
		},
	}

	err := proj.ValidateLayout()
	if err == nil {
		t.Fatal("expected autogen validation error")
	}
	if !strings.Contains(err.Error(), "autogen.consumers[0].mode") {
		t.Fatalf("expected autogen mode validation error, got %v", err)
	}
	if !strings.Contains(err.Error(), "autogen.consumers[0].manifest.asset_name") {
		t.Fatalf("expected autogen asset_name validation error, got %v", err)
	}
	if !strings.Contains(err.Error(), "autogen.consumers[0].manifest.cache_name") {
		t.Fatalf("expected autogen cache_name validation error, got %v", err)
	}
}

func TestValidateLayoutRejectsInvalidAccessoryVisualeffectsConfig(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "src"))
	mkdirAll(t, filepath.Join(root, "build"))

	proj := &Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "test"},
			Paths:  PathConfig{Source: "src", Build: "build"},
			Autogen: AutogenConfig{
				Consumers: []AutogenConsumerConfig{
					{
						ID:       "accessory_visualeffects",
						Producer: "accessory_visualeffects",
						Dataset:  "visualeffects",
						Mode:     "accessory_visualeffects",
						Root:     "vfxs",
						Include:  []string{"head_jewels/**/*.mdl"},
						Derive:   AutogenDeriveConfig{Kind: "model_stem", GroupFrom: "first_path_segment"},
						Manifest: AutogenManifestConfig{
							ReleaseTag: "head-vfx-manifest-current",
							AssetName:  "sow-accessory-vfx-manifest.json",
							CacheName:  "sow-accessory-vfx-manifest.json",
						},
						AccessoryVisualeffects: AccessoryVisualeffectsConfig{
							Groups: map[string]AccessoryVisualeffectGroupConfig{
								"head_jewels": {
									ModelColumns: []string{"Imp Root M Node"},
								},
							},
							StripModelPrefixes: []string{""},
							ModelColumn:        "Imp HeadCon Node",
						},
					},
				},
			},
		},
	}

	err := proj.ValidateLayout()
	if err == nil {
		t.Fatal("expected accessory visualeffects validation error")
	}
	for _, needle := range []string{
		"autogen.consumers[0].accessory_visualeffects.groups[head_jewels].prefix",
		"autogen.consumers[0].accessory_visualeffects.groups[head_jewels].model_columns[0]",
		"autogen.consumers[0].accessory_visualeffects.strip_model_prefixes[0]",
		"autogen.consumers[0].accessory_visualeffects.model_column",
	} {
		if !strings.Contains(err.Error(), needle) {
			t.Fatalf("expected validation error to mention %s, got %v", needle, err)
		}
	}
}

func TestValidateLayoutRejectsInvalidAccessoryVisualeffectsNamingConfig(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "src"))
	mkdirAll(t, filepath.Join(root, "build"))

	proj := &Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "test"},
			Paths:  PathConfig{Source: "src", Build: "build"},
			Autogen: AutogenConfig{
				Consumers: []AutogenConsumerConfig{
					{
						ID:       "accessory_visualeffects",
						Producer: "accessory_visualeffects",
						Dataset:  "visualeffects",
						Mode:     "accessory_visualeffects",
						Root:     "vfxs",
						Include:  []string{"head_features/**/*.mdl"},
						Derive:   AutogenDeriveConfig{Kind: "model_stem", GroupFrom: "first_path_segment"},
						Manifest: AutogenManifestConfig{
							ReleaseTag: "head-vfx-manifest-current",
							AssetName:  "sow-accessory-vfx-manifest.json",
							CacheName:  "sow-accessory-vfx-manifest.json",
						},
						AccessoryVisualeffects: AccessoryVisualeffectsConfig{
							Groups: map[string]AccessoryVisualeffectGroupConfig{
								"head_features": {},
							},
							GroupTokenSource: "unsupported",
							CategoryFrom:     "unsupported",
							Delimiter:        " ",
							Case:             "unsupported",
						},
					},
				},
			},
		},
	}

	err := proj.ValidateLayout()
	if err == nil {
		t.Fatal("expected accessory visualeffects naming validation error")
	}
	for _, needle := range []string{
		"autogen.consumers[0].accessory_visualeffects.group_token_source",
		"autogen.consumers[0].accessory_visualeffects.category_from",
		"autogen.consumers[0].accessory_visualeffects.delimiter",
		"autogen.consumers[0].accessory_visualeffects.case",
	} {
		if !strings.Contains(err.Error(), needle) {
			t.Fatalf("expected validation error to mention %s, got %v", needle, err)
		}
	}
}

func TestValidateLayoutAcceptsCDNChannelConsumerWithoutReleasedSourceFields(t *testing.T) {
	// cdn_channel consumers resolve entirely from Source.* at runtime; they must
	// not be required to supply root/include/derive/manifest fields.
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "src"))
	mkdirAll(t, filepath.Join(root, "build"))

	proj := &Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "test"},
			Paths:  PathConfig{Source: "src", Build: "build"},
			Autogen: AutogenConfig{
				Consumers: []AutogenConsumerConfig{
					{
						ID:       "accessory_visualeffects",
						Producer: "accessory_visualeffects",
						Dataset:  "visualeffects",
						Mode:     "accessory_visualeffects",
						Optional: true,
						AccessoryVisualeffects: AccessoryVisualeffectsConfig{
							Groups: map[string]AccessoryVisualeffectGroupConfig{
								"head_accessories":  {Prefix: "head_acc_"},
								"chest_accessories": {Prefix: "chest_acc_"},
								"head_decorations":  {Prefix: "head_dec_"},
								"head_features":     {Prefix: "head_feat_"},
							},
						},
						Source: AutogenSourceConfig{
							Kind:         "cdn_channel",
							ChannelsPath: "releases/haks/channels.json",
							ManifestPath: "releases/haks/{tag}/vfxs.yml",
						},
						// Intentionally omitted: Root, Include, Derive, Manifest
					},
				},
			},
		},
	}

	if err := proj.ValidateLayout(); err != nil {
		t.Fatalf("cdn_channel consumer should pass ValidateLayout without released-source fields, got: %v", err)
	}
}

func TestLoadRejectsLegacyAccessoryVisualeffectsNamingFields(t *testing.T) {
	root := t.TempDir()
	writeProjectFile(t, filepath.Join(root, ConfigFile), `
module:
  name: Test Module
  resref: testmod
paths:
  source: src
autogen:
  consumers:
    - id: accessory_visualeffects
      producer: accessory_visualeffects
      dataset: visualeffects
      mode: accessory_visualeffects
      root: vfxs
      include:
        - head_features/**/*.mdl
      derive:
        kind: model_stem
        group_from: first_path_segment
      accessory_visualeffects:
        groups:
          head_features:
            model_columns:
              - Imp_HeadCon_Node
        group_token_source: folder_name
        category_from: immediate_parent
        legacy_groups:
          head_features: head_features
        legacy_key_format: "{dataset}:{group}_{stem}"
`)

	_, err := Load(root)
	if err == nil {
		t.Fatal("expected legacy accessory visualeffects naming fields to be rejected")
	}
	if !strings.Contains(err.Error(), "legacy_groups") {
		t.Fatalf("expected legacy_groups unknown field error, got %v", err)
	}
}

func TestValidateLayoutAcceptsGeneratedTopData2DAConfig(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "assets"))
	mkdirAll(t, filepath.Join(root, "build"))
	proj := Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "testmod"},
			Paths:  PathConfig{Assets: "assets"},
			Generated: GeneratedConfig{
				TopData2DA: []GeneratedTopData2DAConfig{
					{
						ID:              "parts",
						Source:          "topdata",
						Output:          "{paths.cache}/generated-assets/parts-2da",
						IncludeDatasets: []string{"parts/**"},
						PackageRoot:     "part",
						Autogen: AutogenConsumerConfig{
							ID:      "parts",
							Mode:    "parts_rows",
							Root:    "part",
							Include: []string{"**/*.mdl"},
							Derive:  AutogenDeriveConfig{Kind: "trailing_numeric_suffix", GroupFrom: "first_path_segment"},
							PartsRows: PartsRowsConfig{
								RowDefaults: map[string]string{"COSTMODIFIER": "0"},
								ACBonus: PartsRowsACBonusConfig{
									Default: PartsRowsACBonusPolicy{Strategy: "ascending_row_id_sort_key", Divisor: 100, Format: "%.2f"},
									Datasets: map[string]PartsRowsACBonusPolicy{
										"chest": {Strategy: "fixed", Value: "0.00"},
									},
								},
							},
						},
					},
					{
						ID:              "cachedmodels",
						Source:          "topdata",
						Output:          "{paths.cache}/generated-assets/cachedmodels-2da",
						IncludeDatasets: []string{"cachedmodels"},
						PackageRoot:     "vfxs",
						Autogen: AutogenConsumerConfig{
							ID:      "cachedmodels",
							Mode:    "cachedmodels_rows",
							Root:    "vfxs",
							Include: []string{"head_accessories/**/*.mdl", "head_features/**/*.mdl"},
							Derive:  AutogenDeriveConfig{Kind: "model_stem", GroupFrom: "first_path_segment"},
						},
					},
					{
						ID:              "static_topdata",
						Source:          "topdata",
						Output:          "{paths.cache}/generated-assets/static-topdata-2da",
						IncludeDatasets: []string{"tailmodel", "wingmodel"},
						PackageRoot:     "part",
					},
				},
			},
		},
	}

	if err := proj.ValidateLayout(); err != nil {
		t.Fatalf("ValidateLayout returned error: %v", err)
	}
	effective := proj.EffectiveConfig()
	if got, want := effective.Generated.TopData2DA[0].Output, ".cache/generated-assets/parts-2da"; got != want {
		t.Fatalf("expected expanded output %q, got %q", want, got)
	}
}

func TestValidateLayoutRejectsUnsupportedGeneratedTopDataAutogenMode(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "assets"))
	mkdirAll(t, filepath.Join(root, "build"))
	proj := Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "testmod"},
			Paths:  PathConfig{Assets: "assets"},
			Generated: GeneratedConfig{
				TopData2DA: []GeneratedTopData2DAConfig{
					{
						ID:              "bad",
						Source:          "topdata",
						Output:          "{paths.cache}/generated-assets/bad-2da",
						IncludeDatasets: []string{"tailmodel"},
						PackageRoot:     "part",
						Autogen: AutogenConsumerConfig{
							Mode:    "unknown_rows",
							Root:    "part",
							Include: []string{"**/*.mdl"},
							Derive:  AutogenDeriveConfig{Kind: "model_stem", GroupFrom: "first_path_segment"},
						},
					},
				},
			},
		},
	}

	err := proj.ValidateLayout()
	if err == nil || !strings.Contains(err.Error(), `generated_assets.topdata_2da[0].autogen.mode "unknown_rows" is not supported`) {
		t.Fatalf("expected unsupported generated autogen mode validation error, got %v", err)
	}
}

func TestValidateLayoutRejectsEscapingGeneratedTopData2DAConfig(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "assets"))
	mkdirAll(t, filepath.Join(root, "build"))
	proj := Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "testmod"},
			Paths:  PathConfig{Assets: "assets"},
			Generated: GeneratedConfig{
				TopData2DA: []GeneratedTopData2DAConfig{
					{
						ID:              "parts",
						Source:          "../topdata",
						Output:          "{paths.cache}/generated-assets/parts-2da",
						IncludeDatasets: []string{"parts/**"},
						PackageRoot:     "part",
						Autogen: AutogenConsumerConfig{
							ID:      "parts",
							Mode:    "parts_rows",
							Root:    "part",
							Include: []string{"**/*.mdl"},
							Derive:  AutogenDeriveConfig{Kind: "trailing_numeric_suffix", GroupFrom: "first_path_segment"},
						},
					},
				},
			},
		},
	}

	err := proj.ValidateLayout()
	if err == nil || !strings.Contains(err.Error(), "generated_assets.topdata_2da[0].source") {
		t.Fatalf("expected generated topdata source validation error, got %v", err)
	}
}

func TestValidateLayoutRejectsInvalidGeneratedPartsRowsACBonusConfig(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "assets"))
	mkdirAll(t, filepath.Join(root, "build"))
	proj := Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "testmod"},
			Paths:  PathConfig{Assets: "assets"},
			Generated: GeneratedConfig{
				TopData2DA: []GeneratedTopData2DAConfig{
					{
						ID:              "parts",
						Source:          "topdata",
						Output:          "{paths.cache}/generated-assets/parts-2da",
						IncludeDatasets: []string{"parts/**"},
						PackageRoot:     "part",
						Autogen: AutogenConsumerConfig{
							ID:      "parts",
							Mode:    "parts_rows",
							Root:    "part",
							Include: []string{"**/*.mdl"},
							Derive:  AutogenDeriveConfig{Kind: "trailing_numeric_suffix", GroupFrom: "first_path_segment"},
							PartsRows: PartsRowsConfig{
								ACBonus: PartsRowsACBonusConfig{
									Default: PartsRowsACBonusPolicy{Strategy: "descending_row_id_sort_key", MaxRowID: 0, Divisor: -1, Format: "%d"},
									Datasets: map[string]PartsRowsACBonusPolicy{
										"chest": {Strategy: "fixed"},
										"robe":  {Strategy: "unknown"},
									},
								},
							},
						},
					},
				},
			},
		},
	}

	err := proj.ValidateLayout()
	if err == nil {
		t.Fatal("expected invalid parts_rows acbonus config to fail")
	}
	text := err.Error()
	for _, want := range []string{
		"generated_assets.topdata_2da[0].autogen.parts_rows.acbonus.default.max_row_id",
		"generated_assets.topdata_2da[0].autogen.parts_rows.acbonus.default.divisor",
		"generated_assets.topdata_2da[0].autogen.parts_rows.acbonus.default.format",
		"generated_assets.topdata_2da[0].autogen.parts_rows.acbonus.datasets.chest.value",
		"generated_assets.topdata_2da[0].autogen.parts_rows.acbonus.datasets.robe.strategy",
	} {
		if !strings.Contains(text, want) {
			t.Fatalf("expected validation error containing %q, got %v", want, err)
		}
	}
}

func TestValidateLayoutRejectsDuplicateHAKNames(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "src"))
	mkdirAll(t, filepath.Join(root, "build"))

	proj := &Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "test"},
			Paths:  PathConfig{Source: "src", Build: "build"},
			HAKs: []HAKConfig{
				{Name: "core", Priority: 1, Include: []string{"core/**"}},
				{Name: "CORE", Priority: 2, Include: []string{"other/**"}},
			},
		},
	}

	err := proj.ValidateLayout()
	if err == nil {
		t.Fatal("expected duplicate hak validation error")
	}
	if !strings.Contains(err.Error(), "duplicated") {
		t.Fatalf("expected duplicate validation error, got %v", err)
	}
}

func TestScanAllowsMissingAssetsDir(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "src"))
	mkdirAll(t, filepath.Join(root, "build"))

	proj := &Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "test"},
			Paths:  PathConfig{Source: "src", Assets: "assets", Build: "build"},
		},
	}

	if err := proj.Scan(); err != nil {
		t.Fatalf("Scan returned error: %v", err)
	}
	if len(proj.Inventory.AssetFiles) != 0 {
		t.Fatalf("expected no asset files, got %#v", proj.Inventory.AssetFiles)
	}
}

func mkdirAll(t *testing.T, path string) {
	t.Helper()
	if err := os.MkdirAll(path, 0o755); err != nil {
		t.Fatalf("mkdir %s: %v", path, err)
	}
}

func TestCloneWithHAKNamesFiltersConfiguredHAKs(t *testing.T) {
	proj := &Project{
		Root: "/tmp/test",
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "test"},
			Paths:  PathConfig{Source: "src", Assets: "assets", Build: "build"},
			HAKs: []HAKConfig{
				{Name: "sow_over", Priority: 1, Include: []string{"over/**"}},
				{Name: "sow_core", Priority: 2, Include: []string{"core/**"}},
				{Name: "sow_item", Priority: 3, Include: []string{"item/**"}},
			},
		},
	}

	filtered, err := proj.CloneWithHAKNames([]string{"sow_core", "sow_item"})
	if err != nil {
		t.Fatalf("CloneWithHAKNames returned error: %v", err)
	}

	if filtered == proj {
		t.Fatalf("expected filtered clone, got original pointer")
	}

	got := make([]string, 0, len(filtered.Config.HAKs))
	for _, hak := range filtered.Config.HAKs {
		got = append(got, hak.Name)
	}
	want := []string{"sow_core", "sow_item"}
	if !slices.Equal(got, want) {
		t.Fatalf("unexpected filtered haks: got %v want %v", got, want)
	}

	if len(proj.Config.HAKs) != 3 {
		t.Fatalf("original project config should remain unchanged, got %d haks", len(proj.Config.HAKs))
	}
}

func TestCloneWithHAKNamesRejectsUnknownHAKs(t *testing.T) {
	proj := &Project{
		Config: Config{
			HAKs: []HAKConfig{
				{Name: "sow_core", Priority: 1, Include: []string{"core/**"}},
			},
		},
	}

	if _, err := proj.CloneWithHAKNames([]string{"missing_hak"}); err == nil {
		t.Fatal("expected error for unknown hak name")
	}
}

func TestValidateAutogenConsumerSourcesCDNChannel(t *testing.T) {
	cases := []struct {
		name     string
		source   AutogenSourceConfig
		wantFail bool
	}{
		{"valid", AutogenSourceConfig{Kind: "cdn_channel", ChannelsPath: "releases/haks/channels.json", ManifestPath: "releases/haks/{tag}/vfxs.yml"}, false},
		{"missing channels_path", AutogenSourceConfig{Kind: "cdn_channel", ManifestPath: "releases/haks/{tag}/vfxs.yml"}, true},
		{"missing manifest_path", AutogenSourceConfig{Kind: "cdn_channel", ChannelsPath: "releases/haks/channels.json"}, true},
		{"manifest_path lacks {tag}", AutogenSourceConfig{Kind: "cdn_channel", ChannelsPath: "releases/haks/channels.json", ManifestPath: "releases/haks/vfxs.yml"}, true},
		{"empty kind is ignored", AutogenSourceConfig{}, false},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			failures := validateAutogenConsumerSources([]AutogenConsumerConfig{{ID: "x", Source: tc.source}})
			if tc.wantFail && len(failures) == 0 {
				t.Fatalf("expected validation failure, got none")
			}
			if !tc.wantFail && len(failures) != 0 {
				t.Fatalf("expected no failure, got %v", failures)
			}
		})
	}
}

func TestValidateRejectsMultiplePartsRowsConsumers(t *testing.T) {
	consumers := []AutogenConsumerConfig{
		{ID: "parts-a", Mode: "parts_rows"},
		{ID: "parts-b", Mode: "parts_rows"},
	}
	if failures := validateAutogenConsumerSources(consumers); len(failures) == 0 {
		t.Fatal("expected error for two parts_rows consumers")
	}
	single := []AutogenConsumerConfig{{ID: "parts", Mode: "parts_rows"}}
	if failures := validateAutogenConsumerSources(single); len(failures) != 0 {
		t.Fatalf("single parts_rows consumer must validate, got %v", failures)
	}
}

func loadAndValidate(root string) error {
	proj, err := Load(root)
	if err != nil {
		return err
	}
	return proj.ValidateLayout()
}

func writeProjectFile(t *testing.T, path, content string) {
	t.Helper()
	if err := os.WriteFile(path, []byte(strings.TrimPrefix(content, "\n")), 0o644); err != nil {
		t.Fatalf("write %s: %v", path, err)
	}
}