package render

import (
	"context"
	"strings"
	"testing"

	"git.dev.alexdunmow.com/block/core/blocks"
	"github.com/google/uuid"
)

type testEmbedResolver struct{}

func (testEmbedResolver) RenderEmbed(_ context.Context, blockID uuid.UUID, dataSource, layout string) string {
	return "embed:" + blockID.String() + ":" + dataSource + ":" + layout
}

func TestBlockNoteToHTMLUsesSDKContextResolvers(t *testing.T) {
	blockID := uuid.MustParse("11111111-1111-1111-1111-111111111111")
	ctx := blocks.WithEmbedResolver(context.Background(), testEmbedResolver{})
	ctx = blocks.WithHumanProofBanner(ctx, &blocks.HumanProofBannerData{
		ActiveTimeMinutes: 12,
		KeystrokeCount:    3456,
		SessionCount:      2,
		PostSlug:          "proof-post",
	})

	html := BlockNoteToHTML(ctx, map[string]any{
		"blocks": []any{
			map[string]any{
				"type": "embed",
				"props": map[string]any{
					"blockId":    blockID.String(),
					"dataSource": "row:22222222-2222-2222-2222-222222222222",
					"layout":     "card",
				},
			},
			map[string]any{"type": "humanProof"},
		},
	})

	if !strings.Contains(html, "embed:"+blockID.String()+":row:22222222-2222-2222-2222-222222222222:card") {
		t.Fatalf("BlockNoteToHTML() did not render embed from SDK context: %s", html)
	}
	if !strings.Contains(html, `data-human-proof-banner`) || !strings.Contains(html, `proof-post`) {
		t.Fatalf("BlockNoteToHTML() did not render human proof banner from SDK context: %s", html)
	}
}

func TestTextAlignment(t *testing.T) {
	tests := []struct {
		name      string
		blockType string
		alignment string
		wantClass string
	}{
		{"paragraph center", "paragraph", "center", "text-center"},
		{"paragraph right", "paragraph", "right", "text-right"},
		{"heading center", "heading", "center", "text-center"},
		{"quote justify", "quote", "justify", "text-justify"},
		{"paragraph left", "paragraph", "left", "text-left"},
		{"paragraph default", "paragraph", "", "my-4"},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			props := map[string]any{}
			if tt.alignment != "" {
				props["textAlignment"] = tt.alignment
			}
			if tt.blockType == "heading" {
				props["level"] = float64(2)
			}
			doc := map[string]any{
				"blocks": []any{
					map[string]any{
						"type":    tt.blockType,
						"props":   props,
						"content": "Test",
					},
				},
			}
			html := BlockNoteToHTML(context.Background(), doc)
			if !strings.Contains(html, tt.wantClass) {
				t.Errorf("expected class %q in output: %s", tt.wantClass, html)
			}
		})
	}
}

func TestCheckListItem(t *testing.T) {
	doc := map[string]any{
		"blocks": []any{
			map[string]any{
				"type":    "checkListItem",
				"props":   map[string]any{"checked": true},
				"content": "Done task",
			},
			map[string]any{
				"type":    "checkListItem",
				"props":   map[string]any{"checked": false},
				"content": "Todo task",
			},
		},
	}
	html := BlockNoteToHTML(context.Background(), doc)

	if !strings.Contains(html, `checked`) {
		t.Errorf("expected checked attribute: %s", html)
	}
	if !strings.Contains(html, "Done task") || !strings.Contains(html, "Todo task") {
		t.Errorf("expected checklist content: %s", html)
	}
	if !strings.Contains(html, `type="checkbox"`) {
		t.Errorf("expected checkbox input: %s", html)
	}
}

func TestToggleListItem(t *testing.T) {
	doc := map[string]any{
		"blocks": []any{
			map[string]any{
				"type":    "toggleListItem",
				"content": "Details",
				"children": []any{
					map[string]any{
						"type":    "paragraph",
						"content": "Nested content",
					},
				},
			},
		},
	}
	html := BlockNoteToHTML(context.Background(), doc)

	if !strings.Contains(html, "<details") {
		t.Errorf("expected details element: %s", html)
	}
	if !strings.Contains(html, "<summary") {
		t.Errorf("expected summary element: %s", html)
	}
	if !strings.Contains(html, "Nested content") {
		t.Errorf("expected nested content: %s", html)
	}
}

func TestToggleListItemOpen(t *testing.T) {
	doc := map[string]any{
		"blocks": []any{
			map[string]any{
				"type":    "toggleListItem",
				"props":   map[string]any{"open": true},
				"content": "Open toggle",
			},
		},
	}
	html := BlockNoteToHTML(context.Background(), doc)
	if !strings.Contains(html, ` open`) {
		t.Errorf("expected open attribute: %s", html)
	}
}

func TestVideoBlock(t *testing.T) {
	doc := map[string]any{
		"blocks": []any{
			map[string]any{
				"type": "video",
				"props": map[string]any{
					"url":     "https://example.com/video.mp4",
					"caption": "My video",
				},
			},
		},
	}
	html := BlockNoteToHTML(context.Background(), doc)

	if !strings.Contains(html, `<video`) {
		t.Errorf("expected video element: %s", html)
	}
	if !strings.Contains(html, `controls`) {
		t.Errorf("expected controls attribute: %s", html)
	}
	if !strings.Contains(html, "My video") {
		t.Errorf("expected caption: %s", html)
	}
}

func TestAudioBlock(t *testing.T) {
	doc := map[string]any{
		"blocks": []any{
			map[string]any{
				"type": "audio",
				"props": map[string]any{
					"url":     "https://example.com/audio.mp3",
					"caption": "Podcast episode",
				},
			},
		},
	}
	html := BlockNoteToHTML(context.Background(), doc)

	if !strings.Contains(html, `<audio`) {
		t.Errorf("expected audio element: %s", html)
	}
	if !strings.Contains(html, `controls`) {
		t.Errorf("expected controls attribute: %s", html)
	}
	if !strings.Contains(html, "Podcast episode") {
		t.Errorf("expected caption: %s", html)
	}
}

func TestFileBlock(t *testing.T) {
	doc := map[string]any{
		"blocks": []any{
			map[string]any{
				"type": "file",
				"props": map[string]any{
					"url":     "https://example.com/doc.pdf",
					"name":    "Document.pdf",
					"caption": "Download here",
				},
			},
		},
	}
	html := BlockNoteToHTML(context.Background(), doc)

	if !strings.Contains(html, `href="https://example.com/doc.pdf"`) {
		t.Errorf("expected file link: %s", html)
	}
	if !strings.Contains(html, "Document.pdf") {
		t.Errorf("expected file name: %s", html)
	}
	if !strings.Contains(html, "Download here") {
		t.Errorf("expected caption: %s", html)
	}
}

func TestFileBlockNoName(t *testing.T) {
	doc := map[string]any{
		"blocks": []any{
			map[string]any{
				"type": "file",
				"props": map[string]any{
					"url": "https://example.com/doc.pdf",
				},
			},
		},
	}
	html := BlockNoteToHTML(context.Background(), doc)
	if !strings.Contains(html, "https://example.com/doc.pdf") {
		t.Errorf("expected URL as fallback name: %s", html)
	}
}

func TestStatementBlock(t *testing.T) {
	doc := map[string]any{
		"blocks": []any{
			map[string]any{
				"type": "statement",
				"content": []any{
					map[string]any{
						"type": "text",
						"text": "This is a key statement.",
					},
				},
			},
		},
	}
	html := BlockNoteToHTML(context.Background(), doc)

	if !strings.Contains(html, `class="bn-statement"`) {
		t.Errorf("expected bn-statement class: %s", html)
	}
	if !strings.Contains(html, "This is a key statement.") {
		t.Errorf("expected statement text: %s", html)
	}
}

func TestStatementBlockWithFormatting(t *testing.T) {
	doc := map[string]any{
		"blocks": []any{
			map[string]any{
				"type": "statement",
				"content": []any{
					map[string]any{
						"type":   "text",
						"text":   "Bold text",
						"styles": map[string]any{"bold": true},
					},
					map[string]any{
						"type": "text",
						"text": " and normal.",
					},
				},
			},
		},
	}
	html := BlockNoteToHTML(context.Background(), doc)

	if !strings.Contains(html, "<strong>Bold text</strong>") {
		t.Errorf("expected bold formatting: %s", html)
	}
}

func TestColorValueToClass(t *testing.T) {
	tests := []struct {
		name     string
		input    string
		prefix   string
		expected string
	}{
		{"empty", "", "text", ""},
		{"default", "default", "text", ""},
		{"theme primary text", "primary", "text", "text-primary"},
		{"theme primary bg", "primary", "bg", "bg-primary"},
		{"theme foreground", "foreground", "text", "text-foreground"},
		{"theme muted-foreground", "muted-foreground", "text", "text-muted-foreground"},
		{"custom color text", "custom:brand", "text", "text-[hsl(var(--color-brand))]"},
		{"custom color bg", "custom:brand", "bg", "bg-[hsl(var(--color-brand))]"},
		{"hex color text", "hex:#ff5500", "text", "text-[#ff5500]"},
		{"hex color bg", "hex:#ff5500", "bg", "bg-[#ff5500]"},
		{"short hex", "hex:#f00", "text", "text-[#f00]"},
		{"invalid hex length", "hex:#ff", "text", ""},
		{"invalid hex char", "hex:#gggggg", "text", ""},
		{"custom with invalid chars", "custom:bad name", "text", ""},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			got := colorValueToClass(tt.input, tt.prefix)
			if got != tt.expected {
				t.Errorf("colorValueToClass(%q, %q) = %q, want %q", tt.input, tt.prefix, got, tt.expected)
			}
		})
	}
}

func TestRenderInlineContentWithTextColor(t *testing.T) {
	content := []map[string]any{
		{
			"type": "text",
			"text": "Hello",
			"styles": map[string]any{
				"textColor": "primary",
			},
		},
	}
	html := renderInlineContent(content)

	if !strings.Contains(html, `class="text-primary"`) {
		t.Errorf("expected text color class: %s", html)
	}
}

func TestRenderInlineContentWithBackgroundColor(t *testing.T) {
	content := []map[string]any{
		{
			"type": "text",
			"text": "Highlighted",
			"styles": map[string]any{
				"backgroundColor": "hex:#ffcc00",
			},
		},
	}
	html := renderInlineContent(content)

	if !strings.Contains(html, `bg-[#ffcc00]`) {
		t.Errorf("expected background color class: %s", html)
	}
}

func TestRenderInlineContentWithBothColors(t *testing.T) {
	content := []map[string]any{
		{
			"type": "text",
			"text": "Styled",
			"styles": map[string]any{
				"textColor":       "foreground",
				"backgroundColor": "custom:highlight",
			},
		},
	}
	html := renderInlineContent(content)

	if !strings.Contains(html, `text-foreground`) {
		t.Errorf("expected text color class: %s", html)
	}
	if !strings.Contains(html, `bg-[hsl(var(--color-highlight))]`) {
		t.Errorf("expected background color class: %s", html)
	}
}

func TestRenderInlineContentWithDefaultColor(t *testing.T) {
	content := []map[string]any{
		{
			"type": "text",
			"text": "Normal",
			"styles": map[string]any{
				"textColor": "default",
			},
		},
	}
	html := renderInlineContent(content)

	if strings.Contains(html, "class=") {
		t.Errorf("default color should not add class: %s", html)
	}
}

func TestRenderInlineContentWithColorsAndOtherStyles(t *testing.T) {
	content := []map[string]any{
		{
			"type": "text",
			"text": "Bold and colored",
			"styles": map[string]any{
				"bold":      true,
				"textColor": "hex:#ff0000",
			},
		},
	}
	html := renderInlineContent(content)

	if !strings.Contains(html, "<strong>") {
		t.Errorf("expected bold tag: %s", html)
	}
	if !strings.Contains(html, `text-[#ff0000]`) {
		t.Errorf("expected text color class: %s", html)
	}
}

func TestBlockNoteToHTMLWithColoredParagraph(t *testing.T) {
	doc := map[string]any{
		"blocks": []any{
			map[string]any{
				"type": "paragraph",
				"content": []any{
					map[string]any{
						"type": "text",
						"text": "Red text",
						"styles": map[string]any{
							"textColor": "hex:#ff0000",
						},
					},
				},
			},
		},
	}
	html := BlockNoteToHTML(context.Background(), doc)

	if !strings.Contains(html, "<p") {
		t.Errorf("expected paragraph tag: %s", html)
	}
	if !strings.Contains(html, `text-[#ff0000]`) {
		t.Errorf("expected text color class: %s", html)
	}
}

func TestBulletListStringContent(t *testing.T) {
	doc := map[string]any{
		"blocks": []any{
			map[string]any{
				"type":    "bulletListItem",
				"content": "Test bullet content",
			},
		},
	}
	html := BlockNoteToHTML(context.Background(), doc)
	if !strings.Contains(html, "Test bullet content") {
		t.Errorf("expected bullet content: %s", html)
	}
}

func TestTableSingleRowDoesNotEmitTbody(t *testing.T) {
	doc := map[string]any{
		"blocks": []any{
			map[string]any{
				"type": "table",
				"content": map[string]any{
					"rows": []any{
						map[string]any{
							"cells": []any{
								[]any{map[string]any{"type": "text", "text": "Header"}},
							},
						},
					},
				},
			},
		},
	}
	html := BlockNoteToHTML(context.Background(), doc)
	if !strings.Contains(html, "<thead>") {
		t.Errorf("expected thead: %s", html)
	}
	if strings.Contains(html, "<tbody>") {
		t.Errorf("did not expect tbody for single-row table: %s", html)
	}
}

func TestTableCellStringContent(t *testing.T) {
	doc := map[string]any{
		"blocks": []any{
			map[string]any{
				"type": "table",
				"content": map[string]any{
					"rows": []any{
						map[string]any{"cells": []any{"Header", "Value"}},
						map[string]any{"cells": []any{"Row", "Cell"}},
					},
				},
			},
		},
	}
	html := BlockNoteToHTML(context.Background(), doc)
	if !strings.Contains(html, "Header") || !strings.Contains(html, "Cell") {
		t.Errorf("expected table cell content: %s", html)
	}
	if !strings.Contains(html, "<tbody>") {
		t.Errorf("expected tbody for multi-row table: %s", html)
	}
}

func TestNestedListRendering(t *testing.T) {
	doc := map[string]any{
		"blocks": []any{
			map[string]any{
				"type":    "bulletListItem",
				"content": "Parent",
				"children": []any{
					map[string]any{
						"type":    "bulletListItem",
						"content": "Child",
					},
				},
			},
		},
	}
	html := BlockNoteToHTML(context.Background(), doc)
	if !strings.Contains(html, "Parent") || !strings.Contains(html, "Child") {
		t.Errorf("expected nested list content: %s", html)
	}
	if strings.Count(html, "<ul") < 2 {
		t.Errorf("expected nested ul elements: %s", html)
	}
}

func TestHardBreakInlineContent(t *testing.T) {
	doc := map[string]any{
		"blocks": []any{
			map[string]any{
				"type": "paragraph",
				"content": []any{
					map[string]any{"type": "text", "text": "Line1"},
					map[string]any{"type": "hardBreak"},
					map[string]any{"type": "text", "text": "Line2"},
				},
			},
		},
	}
	html := BlockNoteToHTML(context.Background(), doc)
	if !strings.Contains(html, "Line1") || !strings.Contains(html, "Line2") || !strings.Contains(html, "<br />") {
		t.Errorf("expected hard break in output: %s", html)
	}
}

func TestReferencesBlock(t *testing.T) {
	doc := map[string]any{
		"blocks": []any{
			map[string]any{
				"type": "references",
				"props": map[string]any{
					"items": `[{"text":"Steve Blank","url":"https://example.com/blank"},{"text":"Charity Majors","url":""}]`,
				},
			},
		},
	}
	html := BlockNoteToHTML(context.Background(), doc)

	if !strings.Contains(html, `class="bn-references"`) {
		t.Errorf("expected bn-references class: %s", html)
	}
	if !strings.Contains(html, `<a href="https://example.com/blank">Steve Blank`) {
		t.Errorf("expected linked reference: %s", html)
	}
	if !strings.Contains(html, "<li>Charity Majors") {
		t.Errorf("expected plain text reference: %s", html)
	}
}

func TestReferencesBlockEmpty(t *testing.T) {
	doc := map[string]any{
		"blocks": []any{
			map[string]any{
				"type":  "references",
				"props": map[string]any{"items": "[]"},
			},
		},
	}
	html := BlockNoteToHTML(context.Background(), doc)
	if !strings.Contains(html, `class="bn-references"`) {
		t.Errorf("expected bn-references wrapper even when empty: %s", html)
	}
}

func TestReferencesBlockMalformedJSON(t *testing.T) {
	doc := map[string]any{
		"blocks": []any{
			map[string]any{
				"type":  "references",
				"props": map[string]any{"items": "not valid json"},
			},
		},
	}
	html := BlockNoteToHTML(context.Background(), doc)
	if !strings.Contains(html, `class="bn-references"`) {
		t.Errorf("expected graceful fallback: %s", html)
	}
}

func TestEmptyDocument(t *testing.T) {
	html := BlockNoteToHTML(context.Background(), map[string]any{})
	if html != "" {
		t.Errorf("expected empty output for empty doc: %s", html)
	}
}

func TestUnknownBlockType(t *testing.T) {
	doc := map[string]any{
		"blocks": []any{
			map[string]any{
				"type":    "unknownBlock",
				"content": "Some content",
			},
		},
	}
	html := BlockNoteToHTML(context.Background(), doc)
	if !strings.Contains(html, "Some content") {
		t.Errorf("expected fallback rendering of unknown block: %s", html)
	}
}