package main

import (
	"testing"
)

func TestParseEditContent_IssueFormat(t *testing.T) {
	tests := []struct {
		name        string
		content     string
		wantTitle   string
		wantMessage string
		wantErr     bool
	}{
		{
			name:        "simple title and message",
			content:     "Title\n\nMessage body",
			wantTitle:   "Title",
			wantMessage: "\nMessage body",
			wantErr:     false,
		},
		{
			name:        "title with comment lines",
			content:     ";; comment\nTitle\n\nMessage",
			wantTitle:   "Title",
			wantMessage: "Message",
			wantErr:     false,
		},
		{
			name:        "multiline message",
			content:     "Title\n\nLine 1\nLine 2\nLine 3",
			wantTitle:   "Title",
			wantMessage: "\nLine 1\nLine 2\nLine 3",
			wantErr:     false,
		},
		{
			name:        "title only no message",
			content:     "Title",
			wantTitle:   "Title",
			wantMessage: "",
			wantErr:     false,
		},
		{
			name:        "empty content",
			content:     "",
			wantTitle:   "",
			wantMessage: "",
			wantErr:     true,
		},
		{
			name:        "only comment lines",
			content:     ";; comment 1\n;; comment 2",
			wantTitle:   "",
			wantMessage: "",
			wantErr:     true,
		},
		{
			name:        "title with leading/trailing whitespace in lines",
			content:     "  Title  \n\n  Line 1  \n  Line 2  ",
			wantTitle:   "Title",
			wantMessage: "\n  Line 1  \n  Line 2  ",
			wantErr:     false,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			gotTitle, gotMessage, err := parseEditContent(tt.content, false)
			if (err != nil) != tt.wantErr {
				t.Errorf("parseEditContent() error = %v, wantErr %v", err, tt.wantErr)
				return
			}
			if gotTitle != tt.wantTitle {
				t.Errorf("parseEditContent() title = %q, want %q", gotTitle, tt.wantTitle)
			}
			if gotMessage != tt.wantMessage {
				t.Errorf("parseEditContent() message = %q, want %q", gotMessage, tt.wantMessage)
			}
		})
	}
}

func TestParseEditContent_CommentFormat(t *testing.T) {
	tests := []struct {
		name        string
		content     string
		wantTitle   string
		wantMessage string
		wantErr     bool
	}{
		{
			name:        "simple comment",
			content:     "Comment text",
			wantTitle:   "",
			wantMessage: "Comment text",
			wantErr:     false,
		},
		{
			name:        "multiline comment",
			content:     "Line 1\nLine 2\nLine 3",
			wantTitle:   "",
			wantMessage: "Line 1\nLine 2\nLine 3",
			wantErr:     false,
		},
		{
			name:        "comment with instruction lines",
			content:     ";; instruction\nComment text",
			wantTitle:   "",
			wantMessage: "Comment text",
			wantErr:     false,
		},
		{
			name:        "empty content",
			content:     "",
			wantTitle:   "",
			wantMessage: "",
			wantErr:     true,
		},
		{
			name:        "only whitespace",
			content:     "   \n   ",
			wantTitle:   "",
			wantMessage: "",
			wantErr:     true,
		},
		{
			name:        "only comment lines",
			content:     ";; comment 1\n;; comment 2",
			wantTitle:   "",
			wantMessage: "",
			wantErr:     true,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			gotTitle, gotMessage, err := parseEditContent(tt.content, true)
			if (err != nil) != tt.wantErr {
				t.Errorf("parseEditContent() error = %v, wantErr %v", err, tt.wantErr)
				return
			}
			if gotTitle != tt.wantTitle {
				t.Errorf("parseEditContent() title = %q, want %q", gotTitle, tt.wantTitle)
			}
			if gotMessage != tt.wantMessage {
				t.Errorf("parseEditContent() message = %q, want %q", gotMessage, tt.wantMessage)
			}
		})
	}
}