package note

import "testing"

func TestSlugifyHeading(t *testing.T) {
	cases := []struct {
		name  string
		input string
		want  string
	}{
		{name: "simple", input: "Glossary", want: "glossary"},
		{name: "date and title", input: "2026-01-01 - First", want: "2026-01-01-first"},
		{name: "punctuation", input: "Hello, World!", want: "hello-world"},
		{name: "trim", input: "  spaced   out  ", want: "spaced-out"},
	}

	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			if got := slugifyHeading(tc.input); got != tc.want {
				t.Fatalf("expected %q, got %q", tc.want, got)
			}
		})
	}
}

func TestParseSections(t *testing.T) {
	content := "# Title\nIntro\n## Alpha\nA1\nA2\n## Beta\nB1\n"

	sections := ParseSections(content)
	if len(sections) != 2 {
		t.Fatalf("expected 2 sections, got %d", len(sections))
	}

	if sections[0].Heading != "Alpha" {
		t.Fatalf("expected first heading Alpha, got %q", sections[0].Heading)
	}
	if sections[0].ID != "alpha" {
		t.Fatalf("expected first id alpha, got %q", sections[0].ID)
	}
	if want := "## Alpha\nA1\nA2\n"; sections[0].Content != want {
		t.Fatalf("expected first content %q, got %q", want, sections[0].Content)
	}

	if sections[1].Heading != "Beta" {
		t.Fatalf("expected second heading Beta, got %q", sections[1].Heading)
	}
	if sections[1].ID != "beta" {
		t.Fatalf("expected second id beta, got %q", sections[1].ID)
	}
	if want := "## Beta\nB1\n"; sections[1].Content != want {
		t.Fatalf("expected second content %q, got %q", want, sections[1].Content)
	}
}

func TestParseSections_DuplicateHeadings(t *testing.T) {
	content := "## Glossary\nTerm A\n## Glossary\nTerm B\n"

	sections := ParseSections(content)
	if len(sections) != 2 {
		t.Fatalf("expected 2 sections, got %d", len(sections))
	}

	if sections[0].ID != "glossary" {
		t.Fatalf("expected first id glossary, got %q", sections[0].ID)
	}
	if sections[1].ID != "glossary-2" {
		t.Fatalf("expected second id glossary-2, got %q", sections[1].ID)
	}
}