package officekit

import "testing"

func TestMarkdownToParagraphsStructure(t *testing.T) {
	src := "# Title\n\nAn intro paragraph.\n\n## Section\n\n- First item\n- Second item\n"
	paras := MarkdownToParagraphs(src)

	want := []Paragraph{
		{Text: "Title", Style: StyleHeading1},
		{Text: "An intro paragraph.", Style: StyleNormal},
		{Text: "Section", Style: StyleHeading2},
		{Text: "First item", Style: StyleBullet},
		{Text: "Second item", Style: StyleBullet},
	}
	if len(paras) != len(want) {
		t.Fatalf("got %d paragraphs, want %d: %+v", len(paras), len(want), paras)
	}
	for i := range want {
		if paras[i].Text != want[i].Text || paras[i].Style != want[i].Style {
			t.Errorf("paragraph %d: got %+v, want %+v", i, paras[i], want[i])
		}
	}
}

func TestMarkdownToParagraphsFlattensInlineFormatting(t *testing.T) {
	paras := MarkdownToParagraphs("This has **bold** and *italic* and `code` text.")
	if len(paras) != 1 {
		t.Fatalf("got %d paragraphs, want 1: %+v", len(paras), paras)
	}
	want := "This has bold and italic and code text."
	if paras[0].Text != want {
		t.Errorf("got %q, want %q", paras[0].Text, want)
	}
}

func TestMarkdownToParagraphsFeedsBuildDocx(t *testing.T) {
	paras := MarkdownToParagraphs("# Report\n\nBody text here.\n")
	data, err := BuildDocx(paras)
	if err != nil {
		t.Fatalf("BuildDocx(MarkdownToParagraphs(...)): %v", err)
	}
	text, err := ReadDocxText(data)
	if err != nil {
		t.Fatalf("ReadDocxText: %v", err)
	}
	for _, want := range []string{"Report", "Body text here."} {
		if !containsLine(text, want) {
			t.Errorf("expected read-back text to contain line %q, got:\n%s", want, text)
		}
	}
}

func containsLine(text, line string) bool {
	for _, l := range splitLines(text) {
		if l == line {
			return true
		}
	}
	return false
}

func splitLines(s string) []string {
	var lines []string
	start := 0
	for i := 0; i < len(s); i++ {
		if s[i] == '\n' {
			lines = append(lines, s[start:i])
			start = i + 1
		}
	}
	lines = append(lines, s[start:])
	return lines
}