package app

import (
	"bytes"
	"encoding/json"
	"os"
	"path/filepath"
	"strings"
	"testing"
	"time"

	"git.westgate.pw/ShadowsOverWestgate/sow-tools/internal/pipeline"
)

func TestParseBuildHAKArgsContentAddressedRoot(t *testing.T) {
	tests := []struct {
		name string
		args []string
		want string
	}{
		{
			name: "separated",
			args: []string{"--content-addressed-root", "/var/cache/blobs"},
			want: "/var/cache/blobs",
		},
		{
			name: "inline",
			args: []string{"--content-addressed-root=/var/cache/blobs"},
			want: "/var/cache/blobs",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			opts, err := parseBuildHAKArgs(tt.args)
			if err != nil {
				t.Fatalf("parse build-haks args: %v", err)
			}
			if opts.contentAddressedRoot != tt.want {
				t.Fatalf("content-addressed root = %q, want %q", opts.contentAddressedRoot, tt.want)
			}
		})
	}
}

func TestParseBuildHAKArgsHelpListsContentAddressedRoot(t *testing.T) {
	_, err := parseBuildHAKArgs([]string{"--help"})
	if err == nil {
		t.Fatal("expected help usage error")
	}
	for _, flag := range []string{
		"--hak",
		"--archive",
		"--source-manifest",
		"--content-addressed-root",
		"--plan-only",
		"--quiet",
		"--verbose",
		"--debug",
	} {
		if !strings.Contains(err.Error(), flag) {
			t.Errorf("help usage missing documented flag %q: %v", flag, err)
		}
	}
}

func TestParseBuildHAKArgsRejectsRemovedMusicFlags(t *testing.T) {
	for _, args := range [][]string{
		{"--skip-music"},
		{"--music-dataset", "westgate"},
		{"--music-dataset=westgate"},
	} {
		if _, err := parseBuildHAKArgs(args); err == nil {
			t.Errorf("expected removed music arguments %v to fail", args)
		}
	}
}

func TestRunBuildTopPackageUsesCachedCompiledOutputs(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "build"))
	mkdirAll(t, filepath.Join(root, ".cache", "2da"))
	mkdirAll(t, filepath.Join(root, "topdata", "assets", "gui"))
	mkdirAll(t, filepath.Join(root, "topdata", "data", "repadjust"))

	writeFile(t, filepath.Join(root, "nwn-tool.yaml"), `
module:
  name: Test Module
  resref: test_module
topdata:
  source: topdata
  build: .cache
  package_hak: sow_top.hak
  package_tlk: sow_tlk.tlk
`)
	writeFile(t, filepath.Join(root, ".cache", "2da", "repadjust.2da"), "2DA V2.0\n\n      Label\n0     TEST_LABEL\n")
	writeFile(t, filepath.Join(root, "build", "sow_tlk.tlk"), "compiled tlk")
	writeFile(t, filepath.Join(root, "topdata", "assets", "gui", "testicon.png"), "icon-data")
	writeFile(t, filepath.Join(root, "topdata", "data", "repadjust", "base.json"), `{
  "output": "repadjust.2da",
  "columns": ["Label"],
  "rows": [{"id": 0, "Label": "TEST_LABEL"}]
}`+"\n")

	sourceTime := time.Now().Add(-2 * time.Hour)
	outputTime := time.Now().Add(-1 * time.Hour)
	setTreeTime(t, filepath.Join(root, "topdata"), sourceTime)
	setFileTime(t, filepath.Join(root, ".cache", "2da", "repadjust.2da"), outputTime)
	setFileTime(t, filepath.Join(root, "build", "sow_tlk.tlk"), outputTime)

	ctx := context{
		stdout: &bytes.Buffer{},
		stderr: &bytes.Buffer{},
		cwd:    root,
		args:   []string{"build-top-package"},
	}

	if err := runBuildTopPackage(ctx); err != nil {
		t.Fatalf("runBuildTopPackage failed: %v", err)
	}
	if _, err := os.Stat(filepath.Join(root, "build", "sow_top.hak")); err != nil {
		t.Fatalf("expected packaged hak output: %v", err)
	}
}

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

	writeFile(t, filepath.Join(root, "nwn-tool.yaml"), `
module:
  name: Test Module
  resref: testmod
paths:
  source: src
  assets: assets
  build: build
haks:
  - name: envi
    priority: 1
    max_bytes: 1048576
    split: false
    include:
      - envi/**
`)
	writeFile(t, filepath.Join(root, "assets", "envi", "music", "westgate", "westgate_theme.bmu"), "authored-bmu")

	var stdout bytes.Buffer
	ctx := context{
		stdout: &stdout,
		stderr: &bytes.Buffer{},
		cwd:    root,
		args:   []string{"build-haks"},
	}

	if err := runBuildHAKs(ctx); err != nil {
		t.Fatalf("runBuildHAKs failed: %v", err)
	}

	manifest, err := os.ReadFile(filepath.Join(root, "build", "haks.json"))
	if err != nil {
		t.Fatalf("read HAK manifest: %v", err)
	}
	if !strings.Contains(string(manifest), "envi/music/westgate/westgate_theme.bmu") {
		t.Fatalf("authored BMU missing from HAK manifest:\n%s", manifest)
	}
}

func setTreeTime(t *testing.T, root string, modTime time.Time) {
	t.Helper()
	err := filepath.WalkDir(root, func(path string, d os.DirEntry, walkErr error) error {
		if walkErr != nil {
			return walkErr
		}
		return os.Chtimes(path, modTime, modTime)
	})
	if err != nil {
		t.Fatalf("set tree time under %s: %v", root, err)
	}
}

func TestTopdataConsoleSuppressesProgressInNormalMode(t *testing.T) {
	var stdout bytes.Buffer
	console := &topdataConsole{
		stdout:       &stdout,
		projectRoot:  "/workspace/project",
		projectName:  "Test Module",
		commandName:  "build-topdata",
		commandLabel: "Build Topdata",
		level:        logLevelNormal,
	}

	console.progress("Packaging compiled topdata resources into sow_top.hak...")

	if stdout.String() != "" {
		t.Fatalf("expected no normal-mode progress output, got %q", stdout.String())
	}
}

func TestSpinnerEnabledForHonorsPlainTTYMode(t *testing.T) {
	t.Setenv("SOW_TOOLS_TTY_MODE", "plain")
	if spinnerEnabledFor(&bytes.Buffer{}, logLevelNormal) {
		t.Fatal("expected plain tty mode to disable spinner output")
	}
}

func TestTopdataConsoleDebugProgressAndRelativePaths(t *testing.T) {
	var stdout bytes.Buffer
	console := &topdataConsole{
		stdout:       &stdout,
		projectRoot:  "/workspace/project",
		projectName:  "Test Module",
		commandName:  "deploy-wiki",
		commandLabel: "Deploy Wiki",
		level:        logLevelDebug,
	}

	console.progress("NodeBB wiki plan: create 1, update 2, skip 3, stale 4, archive 5, purge 6, drift 0")
	console.emitWikiDeployResult(10, 1, 2, 3, 4, 5, 6, 0, "/workspace/project/build/wiki/deploy-manifest.json")

	output := stdout.String()
	if !strings.Contains(output, "NodeBB wiki plan") {
		t.Fatalf("expected debug progress line, got %q", output)
	}
	if !strings.Contains(output, "build/wiki/deploy-manifest.json") || strings.Contains(output, "/workspace/project/") {
		t.Fatalf("expected relative deploy manifest path, got %q", output)
	}
}

func TestParseDeployWikiHelpListsPurgeStalePolicy(t *testing.T) {
	_, err := parseDeployWikiArgs("deploy-wiki", []string{"--help"})
	if err == nil || !strings.Contains(err.Error(), "--stale-policy <report|archive|purge>") {
		t.Fatalf("expected deploy-wiki help to list purge stale policy, got %v", err)
	}
}

func TestParseDeployWikiResetManagedNamespacesFlag(t *testing.T) {
	opts, err := parseDeployWikiArgs("deploy-wiki", []string{"--reset-managed-namespaces"})
	if err != nil {
		t.Fatalf("parse deploy wiki reset flag: %v", err)
	}
	if !opts.ResetManagedNamespaces {
		t.Fatalf("expected --reset-managed-namespaces to enable namespace reset")
	}
}

func TestProjectConsoleSuppressesBuildModuleProgressInNormalMode(t *testing.T) {
	var stdout bytes.Buffer
	console := &projectConsole{
		stdout:       &stdout,
		projectRoot:  "/workspace/project",
		projectName:  "Test Module",
		commandName:  "build-module",
		commandLabel: "Build Module",
		level:        logLevelNormal,
	}

	console.progress("Writing module archive...")

	if stdout.String() != "" {
		t.Fatalf("expected no normal-mode progress output, got %q", stdout.String())
	}
}

func TestProjectConsoleEmitsRelativePaths(t *testing.T) {
	var stdout bytes.Buffer
	console := &projectConsole{
		stdout:       &stdout,
		projectRoot:  "/workspace/project",
		projectName:  "Test Module",
		commandName:  "compare",
		commandLabel: "Compare",
		level:        logLevelNormal,
	}

	console.emitCompareResult(pipeline.CompareResult{
		ModulePath: "/workspace/project/build/test.mod",
		HAKPaths:   []string{"/workspace/project/build/core.hak"},
		Checked:    42,
	})

	output := stdout.String()
	if !strings.Contains(output, "build/test.mod") || strings.Contains(output, "/workspace/project/") {
		t.Fatalf("expected relative module path, got %q", output)
	}
}

func TestRunConfigEffectiveJSONShowsDefaultsAndProvenance(t *testing.T) {
	root := t.TempDir()
	writeFile(t, filepath.Join(root, "nwn-tool.yaml"), `
module:
  name: Test Module
  resref: testmod
paths:
  source: src
`)

	var stdout bytes.Buffer
	ctx := context{
		stdout: &stdout,
		stderr: &bytes.Buffer{},
		cwd:    root,
		args:   []string{"config", "effective", "--json"},
	}

	if err := runConfig(ctx); err != nil {
		t.Fatalf("runConfig failed: %v", err)
	}
	var effective map[string]any
	if err := json.Unmarshal(stdout.Bytes(), &effective); err != nil {
		t.Fatalf("effective config is not JSON: %v\n%s", err, stdout.String())
	}
	provenance, ok := effective["provenance"].(map[string]any)
	if !ok || len(provenance) == 0 {
		t.Fatalf("effective config missing provenance: %#v", effective["provenance"])
	}
	if _, ok := provenance["paths.build"]; !ok {
		t.Fatalf("effective config missing provenance for omitted paths.build: %#v", provenance)
	}
}

func TestRunConfigExplainReportsYAMLSource(t *testing.T) {
	root := t.TempDir()
	writeFile(t, filepath.Join(root, "nwn-tool.yaml"), `
module:
  name: Test Module
  resref: testmod
paths:
  build: output
`)

	var stdout bytes.Buffer
	ctx := context{
		stdout: &stdout,
		stderr: &bytes.Buffer{},
		cwd:    root,
		args:   []string{"config", "explain", "paths.build"},
	}

	if err := runConfig(ctx); err != nil {
		t.Fatalf("runConfig failed: %v", err)
	}
	output := stdout.String()
	if !strings.Contains(output, "output") {
		t.Fatalf("expected configured build value, got %q", output)
	}
	if !strings.Contains(strings.ToLower(output), "yaml") {
		t.Fatalf("expected YAML source, got %q", output)
	}
}

func TestRunConfigValidateDoesNotScanSourceInventory(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "build"))
	writeFile(t, filepath.Join(root, "nwn-tool.yaml"), `
module:
  name: Test Module
  resref: testmod
paths:
  source: missing-src
  build: build
`)

	ctx := context{
		stdout: &bytes.Buffer{},
		stderr: &bytes.Buffer{},
		cwd:    root,
		args:   []string{"config", "validate"},
	}

	if err := runConfig(ctx); err != nil {
		t.Fatalf("runConfig failed: %v", err)
	}
}

func TestRunConfigSourcesListsActiveOverrides(t *testing.T) {
	root := t.TempDir()
	writeFile(t, filepath.Join(root, "nwn-tool.yaml"), `
module:
  name: Test Module
  resref: testmod
paths:
  source: src
`)
	t.Setenv("SOW_BUILD_HAKS_KEEP_EXISTING", "1")

	var stdout bytes.Buffer
	ctx := context{
		stdout: &stdout,
		stderr: &bytes.Buffer{},
		cwd:    root,
		args:   []string{"config", "sources"},
	}

	if err := runConfig(ctx); err != nil {
		t.Fatalf("runConfig failed: %v", err)
	}
	output := stdout.String()
	if !strings.Contains(output, "build.keep_existing_haks") {
		t.Fatalf("expected keep existing override, got %q", output)
	}
}

func TestInlineFlagParsersRejectEmptyValues(t *testing.T) {
	if _, err := parseBuildHAKArgs([]string{"--hak="}); err == nil {
		t.Fatalf("expected empty --hak inline value error, got %v", err)
	}
	if _, err := parseDeployWikiArgs("deploy-wiki", []string{"--endpoint="}); err == nil {
		t.Fatalf("expected empty --endpoint inline value error, got %v", err)
	}
	if _, err := parseBuildChangelogArgs("build-changelog", []string{"--output="}); err == nil {
		t.Fatalf("expected empty --output inline value error, got %v", err)
	}
}

func TestParseBuildChangelogArgsAcceptsInlineValues(t *testing.T) {
	opts, err := parseBuildChangelogArgs("build-changelog", []string{
		"--config=scripts/changelog.json",
		"--output=CHANGELOG.md",
		"--current-tag=v2",
		"--previous-tag=v1",
		"--api-base-url=https://gitea.example/api/v1",
		"--token=secret",
	})
	if err != nil {
		t.Fatalf("parseBuildChangelogArgs failed: %v", err)
	}
	if opts.configPath != "scripts/changelog.json" ||
		opts.outputPath != "CHANGELOG.md" ||
		opts.currentTag != "v2" ||
		opts.previousTag != "v1" ||
		opts.apiBaseURL != "https://gitea.example/api/v1" ||
		opts.token != "secret" {
		t.Fatalf("unexpected changelog opts: %#v", opts)
	}
}

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

func setFileTime(t *testing.T, path string, modTime time.Time) {
	t.Helper()
	if err := os.Chtimes(path, modTime, modTime); err != nil {
		t.Fatalf("set file time %s: %v", path, err)
	}
}