package topdata

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

func TestBuildNativeGeneratesAndSkipsWikiPages(t *testing.T) {
	root := testProjectRoot(t)
	mkdirAll(t, filepath.Join(root, "topdata", "data", "skills"))
	writeFile(t, filepath.Join(root, "topdata", "base_dialog.json"), "{}\n")
	writeFile(t, filepath.Join(root, "topdata", "data", "skills", "base.json"), `{
  "output": "skills.2da",
  "columns": ["Label", "Name", "Description", "HideFromLevelUp", "Untrained", "KeyAbility", "ArmorCheckPenalty", "Constant"],
  "rows": [
    {
      "id": 0,
      "key": "skills:athletics",
      "Label": "Athletics",
      "Name": {"tlk": {"key": "skills:athletics.name", "text": "Athletics"}},
      "Description": {"tlk": {"key": "skills:athletics.description", "text": "Ability: Strength.\n\nUses:\n- Climb\n- Swim"}},
      "HideFromLevelUp": "0",
      "Untrained": "1",
      "KeyAbility": "STR",
      "ArmorCheckPenalty": "1",
      "Constant": "SKILL_ATHLETICS"
    }
  ]
}`+"\n")
	writeFile(t, filepath.Join(root, "topdata", "data", "skills", "lock.json"), `{"skills:athletics":0}`+"\n")

	proj := testProject(root)
	proj.Config.TopData.ReferenceBuilder = ""

	result, err := BuildNative(proj, nil)
	if err != nil {
		t.Fatalf("BuildNative failed: %v", err)
	}
	generatedHTMLCount := countGeneratedWikiHTMLFiles(t, filepath.Join(root, ".cache", "wiki", "pages"))
	if result.WikiPages != generatedHTMLCount {
		t.Fatalf("expected wiki page count to match generated HTML files, got result=%d files=%d", result.WikiPages, generatedHTMLCount)
	}
	pagePath := filepath.Join(root, ".cache", "wiki", "pages", "skills", "athletics.html")
	got, err := os.ReadFile(pagePath)
	if err != nil {
		t.Fatalf("read generated page: %v", err)
	}
	text := string(got)
	if !strings.Contains(text, "<h1>Athletics</h1>") || !strings.Contains(text, `class="wiki-callout wiki-callout--status"`) || !strings.Contains(text, "This skill is unchanged from vanilla.") {
		t.Fatalf("unexpected generated page:\n%s", text)
	}
	if !strings.Contains(text, `<!-- sow-topdata-wiki:page=skills:athletics -->`) || !strings.Contains(text, `<!-- sow-topdata-wiki:managed:start hash="sha256:`) || !strings.Contains(text, "Ability: Strength.") || !strings.Contains(text, "<li>Climb</li>") {
		t.Fatalf("expected HTML managed markers and description to be rendered into wiki page:\n%s", text)
	}
	if strings.Contains(text, "[//]: #") || strings.Contains(text, "<WRAP>") {
		t.Fatalf("expected generated HTML to omit DokuWiki-era syntax:\n%s", text)
	}
	if !strings.Contains(text, `<!-- sow-topdata-wiki:manual:start id="notes" -->`) || !strings.Contains(text, "<h2>See Also</h2>") {
		t.Fatalf("expected generated page to include manual section placeholders:\n%s", text)
	}
	statusPath := filepath.Join(root, ".cache", "wiki", "pages", "meta", "wikistatus.html")
	statusRaw, err := os.ReadFile(statusPath)
	if err != nil {
		t.Fatalf("read status page: %v", err)
	}
	if !strings.Contains(string(statusRaw), "<th>Vanilla</th><td>1</td>") {
		t.Fatalf("expected wiki status summary to count vanilla page:\n%s", string(statusRaw))
	}
	indexRaw, err := os.ReadFile(filepath.Join(root, ".cache", "wiki", "page-index.json"))
	if err != nil {
		t.Fatalf("read page index: %v", err)
	}
	var pageIndex wikiPageIndex
	if err := json.Unmarshal(indexRaw, &pageIndex); err != nil {
		t.Fatalf("parse page index: %v", err)
	}
	if len(pageIndex.Pages) != generatedHTMLCount {
		t.Fatalf("expected page-index entries to match generated HTML files, got index=%d files=%d", len(pageIndex.Pages), generatedHTMLCount)
	}
	indexText := string(indexRaw)
	if !strings.Contains(indexText, `"page_id": "skills:athletics"`) || !strings.Contains(indexText, `"output_path": "pages/skills/athletics.html"`) || !strings.Contains(indexText, `"edit_policy": "preserve_manual_sections"`) {
		t.Fatalf("expected deterministic page-index metadata, got:\n%s", indexText)
	}
	if !strings.Contains(indexText, `"page_id": "meta:wikistatus"`) || !strings.Contains(indexText, `"output_path": "pages/meta/wikistatus.html"`) || !strings.Contains(indexText, `"edit_policy": "generated_only"`) {
		t.Fatalf("expected status pages in page-index metadata, got:\n%s", indexText)
	}
	if _, err := os.Stat(filepath.Join(root, ".cache", "wiki", "state.json")); err != nil {
		t.Fatalf("expected state file after first build: %v", err)
	}
	stateBefore, err := loadWikiState(filepath.Join(root, ".cache", "wiki", "state.json"))
	if err != nil {
		t.Fatalf("read state before second build: %v", err)
	}
	digestBefore, err := computeWikiSourceDigest(filepath.Join(root, "topdata"))
	if err != nil {
		t.Fatalf("compute digest before second build: %v", err)
	}
	if stateBefore.Digest != digestBefore {
		t.Fatalf("expected state digest to match current digest before second build, got state=%s current=%s", stateBefore.Digest, digestBefore)
	}

	second, err := BuildNative(proj, nil)
	if err != nil {
		t.Fatalf("second BuildNative failed: %v", err)
	}
	if second.WikiPages != generatedHTMLCount {
		t.Fatalf("expected generated wiki page count after rebuild to remain stable, got %d want %d", second.WikiPages, generatedHTMLCount)
	}
}

func countGeneratedWikiHTMLFiles(t *testing.T, root string) int {
	t.Helper()
	count := 0
	err := filepath.WalkDir(root, func(path string, d os.DirEntry, err error) error {
		if err != nil {
			return err
		}
		if !d.IsDir() && strings.EqualFold(filepath.Ext(path), ".html") {
			count++
		}
		return nil
	})
	if err != nil {
		t.Fatalf("count generated wiki HTML files: %v", err)
	}
	return count
}

func TestWikiClassNamePrefersFullNameInsteadOfShortCode(t *testing.T) {
	ctx := &wikiContext{}
	got := ctx.resolveRowName("classes", map[string]any{
		"Name":  map[string]any{"tlk": map[string]any{"key": "classes:wizard.name", "text": "Wizard"}},
		"Short": map[string]any{"tlk": map[string]any{"key": "classes:wizard.short", "text": "Wiz"}},
	})
	if got != "Wizard" {
		t.Fatalf("expected full class name, got %q", got)
	}
}

func TestWikiTemplateRendersFieldsFormattersAndPreservedTopSection(t *testing.T) {
	ctx := &wikiContext{}
	page := wikiTemplatePage{
		PageID:   "classes:acolyte",
		Category: "classes",
		Key:      "classes:acolyte",
		Title:    "Acolyte",
		Status:   wikiStatusNew,
		Row: map[string]any{
			"HitDie":         6,
			"SkillPointBase": 4,
			"Description": map[string]any{"tlk": map[string]any{
				"text": "Acolyte description.",
			}},
		},
		ManualSections: []wikiManualSection{
			{ID: "user_top", Alias: "UserTopSection", InitialHTML: "<p></p>"},
			{ID: "notes", Alias: "UserBottomSection", InitialHTML: "<h2>Notes</h2><p></p>"},
		},
	}

	got, err := ctx.renderWikiTemplateString("classes.html", `<h1>{{title}}</h1>
{{UserTopSection}}
<p>Hit Die: {{HitDie}}</p>
<p>Skill Points: {{SkillPointBase}}</p>
{{format:StatusCallout}}
{{format:Description}}
{{UserBottomSection}}`, page)
	if err != nil {
		t.Fatalf("render template: %v", err)
	}

	if !strings.Contains(got, "<h1>Acolyte</h1>\n<!-- sow-topdata-wiki:manual:start id=\"user_top\" -->") {
		t.Fatalf("expected preserved top section directly after title, got:\n%s", got)
	}
	for _, expected := range []string{
		"<p>Hit Die: 6</p>",
		"<p>Skill Points: 4</p>",
		"This is a new class!",
		"<p>Acolyte description.</p>",
		`<!-- sow-topdata-wiki:manual:start id="notes" -->`,
	} {
		if !strings.Contains(got, expected) {
			t.Fatalf("expected %q in rendered template:\n%s", expected, got)
		}
	}
}

func TestWikiTemplateMissingFieldFailsUnlessDefaultProvided(t *testing.T) {
	ctx := &wikiContext{}
	page := wikiTemplatePage{PageID: "classes:acolyte", Category: "classes", Title: "Acolyte", Row: map[string]any{}}

	if _, err := ctx.renderWikiTemplateString("classes.html", `<p>{{HitDie}}</p>`, page); err == nil || !strings.Contains(err.Error(), `missing field "HitDie"`) {
		t.Fatalf("expected missing field error, got %v", err)
	}

	got, err := ctx.renderWikiTemplateString("classes.html", `<p>{{field:HitDie|default=unknown}}</p>`, page)
	if err != nil {
		t.Fatalf("expected defaulted field to render, got %v", err)
	}
	if got != "<p>unknown</p>" {
		t.Fatalf("expected default value, got %q", got)
	}
}

func TestWikiManagedHashIgnoresPreservedSectionBody(t *testing.T) {
	first := strings.Join([]string{
		`<!-- sow-topdata-wiki:page=classes:acolyte -->`,
		`<!-- sow-topdata-wiki:managed:start hash="sha256:first" -->`,
		`<h1>Acolyte</h1>`,
		`<!-- sow-topdata-wiki:manual:start id="user_top" -->`,
		`<p>Original user edit.</p>`,
		`<!-- sow-topdata-wiki:manual:end id="user_top" -->`,
		`<p>Generated.</p>`,
		`<!-- sow-topdata-wiki:managed:end -->`,
	}, "\n")
	second := strings.Replace(first, "<p>Original user edit.</p>", "<p>Changed by a user.</p>", 1)

	if computeManagedHash(first) != computeManagedHash(second) {
		t.Fatalf("expected preserved section body not to affect managed hash")
	}
}

func TestWikiSourceDigestIncludesTemplates(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "data", "skills"))
	mkdirAll(t, filepath.Join(root, "wiki", "templates", "pages"))
	writeFile(t, filepath.Join(root, "data", "skills", "base.json"), `{"rows":[]}`+"\n")
	templatePath := filepath.Join(root, "wiki", "templates", "pages", "skills.html")
	writeFile(t, templatePath, `<h1>{{title}}</h1>`+"\n")

	before, err := computeWikiSourceDigest(root)
	if err != nil {
		t.Fatalf("compute initial digest: %v", err)
	}
	writeFile(t, templatePath, `<h1>{{title}}</h1><p>Changed</p>`+"\n")
	after, err := computeWikiSourceDigest(root)
	if err != nil {
		t.Fatalf("compute changed digest: %v", err)
	}
	if before == after {
		t.Fatalf("expected template edit to change wiki source digest")
	}
}

func TestWikiPageIDForKeyNormalizesSlashAndUnderscoreSeparators(t *testing.T) {
	got := wikiPageIDForKey("feat:special/attacks_bull_rush")
	if want := "feat:special:attacks:bull:rush"; got != want {
		t.Fatalf("expected normalized page ID %q, got %q", want, got)
	}
}

func TestSaveWikiPageIndexRejectsDuplicateOutputPaths(t *testing.T) {
	err := saveWikiPageIndex(filepath.Join(t.TempDir(), "page-index.json"), wikiPageIndex{
		Version: wikiGeneratorVersion,
		Pages: []wikiPageIndexEntry{
			{PageID: "feat:special:attacks:bull:rush", OutputPath: "pages/feat/special/attacks/bull/rush.html"},
			{PageID: "feat:special/attacks:bull:rush", OutputPath: "pages/feat/special/attacks/bull/rush.html"},
		},
	})
	if err == nil || !strings.Contains(err.Error(), "duplicate wiki page-index output_path") {
		t.Fatalf("expected duplicate output_path validation error, got %v", err)
	}
}

func TestBuildAndPackageBuildsWikiOnlyWhenRequested(t *testing.T) {
	root := testProjectRoot(t)
	mkdirAll(t, filepath.Join(root, "topdata", "data", "skills"))
	writeFile(t, filepath.Join(root, "topdata", "base_dialog.json"), "{}\n")
	writeFile(t, filepath.Join(root, "topdata", "data", "skills", "base.json"), `{
  "output": "skills.2da",
  "columns": ["Label", "Name", "Description", "HideFromLevelUp", "Untrained", "KeyAbility", "ArmorCheckPenalty", "Constant"],
  "rows": [
    {
      "id": 0,
      "key": "skills:athletics",
      "Label": "Athletics",
      "Name": {"tlk": {"key": "skills:athletics.name", "text": "Athletics"}},
      "Description": {"tlk": {"key": "skills:athletics.description", "text": "Skill text."}},
      "HideFromLevelUp": "0",
      "Untrained": "1",
      "KeyAbility": "STR",
      "ArmorCheckPenalty": "1",
      "Constant": "SKILL_ATHLETICS"
    }
  ]
}`+"\n")
	writeFile(t, filepath.Join(root, "topdata", "data", "skills", "lock.json"), `{"skills:athletics":0}`+"\n")

	proj := testProject(root)
	proj.Config.TopData.ReferenceBuilder = ""

	result, err := BuildAndPackageWithOptions(proj, BuildAndPackageOptions{}, nil)
	if err != nil {
		t.Fatalf("BuildAndPackageWithOptions failed: %v", err)
	}
	if result.WikiOutputDir != "" || result.WikiPages != 0 {
		t.Fatalf("expected wiki generation to be skipped by default, got dir=%q pages=%d", result.WikiOutputDir, result.WikiPages)
	}
	if _, err := os.Stat(filepath.Join(root, ".cache", "wiki", "state.json")); !os.IsNotExist(err) {
		t.Fatalf("expected no wiki state without explicit wiki build, got %v", err)
	}

	result, err = BuildAndPackageWithOptions(proj, BuildAndPackageOptions{Force: true, BuildWiki: true}, nil)
	if err != nil {
		t.Fatalf("BuildAndPackageWithOptions with wiki failed: %v", err)
	}
	generatedHTMLCount := countGeneratedWikiHTMLFiles(t, filepath.Join(root, ".cache", "wiki", "pages"))
	if result.WikiPages != generatedHTMLCount {
		t.Fatalf("expected wiki page count to match generated HTML files when requested, got result=%d files=%d", result.WikiPages, generatedHTMLCount)
	}
	if _, err := os.Stat(filepath.Join(root, ".cache", "wiki", "state.json")); err != nil {
		t.Fatalf("expected wiki state after explicit wiki build: %v", err)
	}
}

func TestBuildNativeRegeneratesWikiWhenTLKTextChanges(t *testing.T) {
	root := testProjectRoot(t)
	mkdirAll(t, filepath.Join(root, "topdata", "data", "skills"))
	writeFile(t, filepath.Join(root, "topdata", "base_dialog.json"), "{}\n")
	basePath := filepath.Join(root, "topdata", "data", "skills", "base.json")
	writeFile(t, basePath, `{
  "output": "skills.2da",
  "columns": ["Label", "Name", "Description", "HideFromLevelUp", "Untrained", "KeyAbility", "ArmorCheckPenalty", "Constant"],
  "rows": [
    {
      "id": 0,
      "key": "skills:athletics",
      "Label": "Athletics",
      "Name": {"tlk": {"key": "skills:athletics.name", "text": "Athletics"}},
      "Description": {"tlk": {"key": "skills:athletics.description", "text": "Original text."}},
      "HideFromLevelUp": "0",
      "Untrained": "1",
      "KeyAbility": "STR",
      "ArmorCheckPenalty": "1",
      "Constant": "SKILL_ATHLETICS"
    }
  ]
}`+"\n")
	writeFile(t, filepath.Join(root, "topdata", "data", "skills", "lock.json"), `{"skills:athletics":0}`+"\n")

	proj := testProject(root)
	proj.Config.TopData.ReferenceBuilder = ""
	proj.Config.Autogen.Consumers = nil

	if _, err := BuildNative(proj, nil); err != nil {
		t.Fatalf("initial BuildNative failed: %v", err)
	}
	writeFile(t, basePath, `{
  "output": "skills.2da",
  "columns": ["Label", "Name", "Description", "HideFromLevelUp", "Untrained", "KeyAbility", "ArmorCheckPenalty", "Constant"],
  "rows": [
    {
      "id": 0,
      "key": "skills:athletics",
      "Label": "Athletics",
      "Name": {"tlk": {"key": "skills:athletics.name", "text": "Athletics"}},
      "Description": {"tlk": {"key": "skills:athletics.description", "text": "Updated text."}},
      "HideFromLevelUp": "0",
      "Untrained": "1",
      "KeyAbility": "STR",
      "ArmorCheckPenalty": "1",
      "Constant": "SKILL_ATHLETICS"
    }
  ]
}`+"\n")

	if _, err := BuildNative(proj, nil); err != nil {
		t.Fatalf("BuildNative after text change failed: %v", err)
	}
	pagePath := filepath.Join(root, ".cache", "wiki", "pages", "skills", "athletics.html")
	got, err := os.ReadFile(pagePath)
	if err != nil {
		t.Fatalf("read regenerated page: %v", err)
	}
	if !strings.Contains(string(got), "Updated text.") {
		t.Fatalf("expected regenerated page to contain updated description:\n%s", string(got))
	}
}

func TestBuildPackageIgnoresWikiSourcesForFreshness(t *testing.T) {
	root := testProjectRoot(t)
	mkdirAll(t, filepath.Join(root, "topdata", "data", "skills"))
	writeFile(t, filepath.Join(root, "topdata", "base_dialog.json"), "{}\n")
	writeFile(t, filepath.Join(root, "topdata", "data", "skills", "base.json"), `{
  "output": "skills.2da",
  "columns": ["Label", "Name", "Description", "HideFromLevelUp", "Untrained", "KeyAbility", "ArmorCheckPenalty", "Constant"],
  "rows": [
    {
      "id": 0,
      "key": "skills:athletics",
      "Label": "Athletics",
      "Name": {"tlk": {"key": "skills:athletics.name", "text": "Athletics"}},
      "Description": {"tlk": {"key": "skills:athletics.description", "text": "Skill text."}},
      "HideFromLevelUp": "0",
      "Untrained": "1",
      "KeyAbility": "STR",
      "ArmorCheckPenalty": "1",
      "Constant": "SKILL_ATHLETICS"
    }
  ]
}`+"\n")
	writeFile(t, filepath.Join(root, "topdata", "data", "skills", "lock.json"), `{"skills:athletics":0}`+"\n")

	proj := testProject(root)
	proj.Config.TopData.ReferenceBuilder = ""
	proj.Config.Autogen.Consumers = nil

	if _, err := BuildNative(proj, nil); err != nil {
		t.Fatalf("BuildNative failed: %v", err)
	}

	pagePath := filepath.Join(root, ".cache", "wiki", "pages", "skills", "athletics.html")
	newTime := time.Now().Add(2 * time.Second)
	if err := os.Chtimes(pagePath, newTime, newTime); err != nil {
		t.Fatalf("touch wiki page: %v", err)
	}

	if _, err := BuildPackage(proj, nil); err != nil {
		t.Fatalf("expected wiki output to be ignored for freshness, got %v", err)
	}
}