package note

import (
	"testing"
)

func TestExtractTitle(t *testing.T) {
	cases := []struct {
		name     string
		markdown string
		want     string
	}{
		{
			name:     "first h1 becomes title",
			markdown: "# My Note\n\nSome content",
			want:     "My Note",
		},
		{
			name:     "no h1 uses filename",
			markdown: "## Just h2\n\nContent",
			want:     "", // or filename from context
		},
		{
			name:     "multiple h1s takes first",
			markdown: "# First\n\n# Second",
			want:     "First",
		},
		{
			name:     "h1 with formatting",
			markdown: "# **Bold** and *italic* title",
			want:     "Bold and italic title",
		},
		{
			name:     "empty file",
			markdown: "",
			want:     "",
		},
	}

	for _, tt := range cases {
		t.Run(tt.name, func(t *testing.T) {
			got := ExtractTitle(tt.markdown)
			if got != tt.want {
				t.Errorf("got %q, want %q", got, tt.want)
			}
		})
	}
}

func TestGenerateNoteID(t *testing.T) {
	tests := []struct {
		name string
		path string
		want string // SHA-256 hash
	}{
		{
			name: "consistent hashing",
			path: "notes/test.md",
			want: "110bab5b8f",
		},
		{
			name: "different paths different ids",
			path: "notes/other.md",
			want: "858d15849b",
		},
		{
			name: "root folder as 'current folder'",
			path: ".",
			want: "cdb4ee2aea",
		},
	}

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

			// Test consistency
			got2 := GenerateNoteID(tt.path)
			if got != got2 {
				t.Error("same path should produce same ID")
			}
		})
	}
}