package issue

import (
	"strings"
	"testing"
	"time"
)

func Test_formatDiscussionMarkdown_includesIssueAndComments(t *testing.T) {
	created := time.Date(2026, 1, 2, 15, 4, 5, 0, time.UTC)
	commentTime := time.Date(2026, 1, 3, 9, 0, 0, 0, time.UTC)
	md := formatDiscussionMarkdown(
		discussionIssue{
			Number:    42,
			Title:     "bug with screenshot",
			Author:    "octocat",
			State:     "open",
			Labels:    []string{"bug", "help wanted"},
			Body:      "see attached",
			CreatedAt: created,
		},
		[]discussionComment{
			{Author: "reviewer", CreatedAt: commentTime, Body: "thanks for reporting"},
		},
	)

	wantSubstrings := []string{
		"# bug with screenshot (#42)",
		"**Author:** octocat",
		"**State:** open",
		"**Labels:** bug, help wanted",
		"**Created:** 2026-01-02T15:04:05Z",
		"see attached",
		"## Comments",
		"### reviewer",
		"2026-01-03T09:00:00Z",
		"thanks for reporting",
	}
	for _, want := range wantSubstrings {
		if !strings.Contains(md, want) {
			t.Fatalf("expected markdown to contain %q, got:\n%s", want, md)
		}
	}
}

func Test_formatDiscussionMarkdown_noComments(t *testing.T) {
	md := formatDiscussionMarkdown(
		discussionIssue{
			Number: 1,
			Title:  "no comments yet",
			Author: "octocat",
			State:  "open",
		},
		nil,
	)

	if !strings.Contains(md, "## Comments") {
		t.Fatalf("expected a Comments section, got:\n%s", md)
	}
	if !strings.Contains(md, "_No comments yet._") {
		t.Fatalf("expected placeholder for no comments, got:\n%s", md)
	}
}

func Test_formatDiscussionMarkdown_attachmentBodyIsInlined(t *testing.T) {
	md := formatDiscussionMarkdown(
		discussionIssue{
			Number: 7,
			Title:  "with attachment",
			Author: "octocat",
			State:  "open",
			Body:   "see attached\n\n[shot.png](https://example/shot.png)",
		},
		[]discussionComment{
			{Author: "reviewer", Body: "log attached\n\n[log.txt](https://example/log.txt)"},
		},
	)

	if !strings.Contains(md, "[shot.png](https://example/shot.png)") {
		t.Fatalf("expected issue attachment link in markdown, got:\n%s", md)
	}
	if !strings.Contains(md, "[log.txt](https://example/log.txt)") {
		t.Fatalf("expected comment attachment link in markdown, got:\n%s", md)
	}
}