package main

import (
	"strings"
	"testing"

	"github.com/charmbracelet/x/ansi"
)

func TestCommentMarkdownDistinguishesQuoteAndReply(t *testing.T) {
	lines := renderCommentMarkdown("> This is the quoted review.\n\nThis is my reply.", 60)
	rendered := strings.Join(lines, "\n")
	plain := ansi.Strip(rendered)
	if !strings.Contains(plain, "This is the quoted review.") ||
		!strings.Contains(plain, "This is my reply.") {
		t.Fatalf("comment content was lost:\n%q", rendered)
	}
	if !strings.Contains(plain, "│") && !strings.Contains(plain, "┃") &&
		!strings.Contains(plain, ">") {
		t.Fatalf("quote has no visible marker:\n%q", rendered)
	}
}

func TestCommentMarkdownStylesInlineCode(t *testing.T) {
	rendered := strings.Join(renderCommentMarkdown(
		"Use `list_comparison` for this value.", 60,
	), "\n")
	plain := ansi.Strip(rendered)
	if !strings.Contains(plain, "Use list_comparison for this value.") {
		t.Fatalf("inline code was lost: %q", rendered)
	}
	if strings.Contains(plain, "Use  list_comparison  for") {
		t.Fatalf("inline code added surrounding spaces: %q", plain)
	}
	if !strings.Contains(rendered, "48;5;236m") {
		t.Fatalf("inline code has no distinct background: %q", rendered)
	}
}

func TestWrappedQuoteKeepsRailOnEveryLine(t *testing.T) {
	const width = 28
	lines := renderCommentMarkdown(
		"> This quoted reply is deliberately long enough to wrap across several terminal lines.",
		width,
	)
	if len(lines) < 2 {
		t.Fatalf("quote did not wrap: %#v", lines)
	}
	for i, line := range lines {
		plain := ansi.Strip(line)
		if strings.TrimSpace(plain) != "" && !strings.HasPrefix(plain, "│ ") {
			t.Fatalf("wrapped quote line %d lost its rail: %q", i, plain)
		}
		if ansi.StringWidth(line) > width {
			t.Fatalf("wrapped quote line %d is too wide: %q", i, plain)
		}
	}
}

func TestCommentMarkdownRendersGFMStructures(t *testing.T) {
	body := "## Result\n\n- [x] done\n- [ ] pending\n\n~~old~~ **new** :+1:\n\n| Name | State |\n| --- | --- |\n| check | good |"
	plain := ansi.Strip(strings.Join(renderCommentMarkdown(body, 70), "\n"))
	for _, wanted := range []string{"Result", "done", "pending", "old", "new", "👍", "Name", "State", "check", "good"} {
		if !strings.Contains(plain, wanted) {
			t.Fatalf("rendered Markdown lost %q:\n%s", wanted, plain)
		}
	}
}

func TestCommentMarkdownRendersGitHubAlert(t *testing.T) {
	plain := ansi.Strip(strings.Join(renderCommentMarkdown(
		"> [!WARNING]\n> This can delete data.", 60,
	), "\n"))
	if !strings.Contains(plain, "Warning") || !strings.Contains(plain, "This can delete data.") {
		t.Fatalf("GitHub alert was not rendered structurally:\n%s", plain)
	}
}

func TestCommentMarkdownStaysWithinRequestedWidth(t *testing.T) {
	const width = 34
	body := "> A long quoted reply containing `inline_code` that needs wrapping.\n\n" +
		"- A similarly long list item that also needs wrapping."
	for i, line := range renderCommentMarkdown(body, width) {
		if got := ansi.StringWidth(line); got > width {
			t.Fatalf("line %d width = %d, want at most %d: %q", i, got, width, line)
		}
	}
}