// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
// SPDX-License-Identifier: MIT

package markdown

import "testing"

// gfmCorpus holds the cases of the GitHub Flavored Markdown extensions:
// tables, strikethrough and task lists.
var gfmCorpus = []struct {
	name  string
	input string
	want  string
}{
	// Tables, in the multi-line shape the GFM specification prints.
	{"table basic", "| foo | bar |\n| --- | --- |\n| baz | bim |",
		"<table>\n<thead>\n<tr>\n<th>foo</th>\n<th>bar</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>baz</td>\n<td>bim</td>\n</tr>\n</tbody>\n</table>\n"},
	{"table without boundary pipes", "foo | bar\n--- | ---\nbaz | bim",
		"<table>\n<thead>\n<tr>\n<th>foo</th>\n<th>bar</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>baz</td>\n<td>bim</td>\n</tr>\n</tbody>\n</table>\n"},
	{"table alignment", "| a | b | c | d |\n| :- | :-: | -: | - |",
		"<table>\n<thead>\n<tr>\n<th align=\"left\">a</th>\n<th align=\"center\">b</th>\n<th align=\"right\">c</th>\n<th>d</th>\n</tr>\n</thead>\n</table>\n"},
	{"table without body", "| abc | def |\n| --- | --- |",
		"<table>\n<thead>\n<tr>\n<th>abc</th>\n<th>def</th>\n</tr>\n</thead>\n</table>\n"},
	{"table excess cell ignored", "| a | b |\n| --- | --- |\n| c | d | e |",
		"<table>\n<thead>\n<tr>\n<th>a</th>\n<th>b</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>c</td>\n<td>d</td>\n</tr>\n</tbody>\n</table>\n"},
	{"table missing cell empty", "| a | b |\n| --- | --- |\n| c |",
		"<table>\n<thead>\n<tr>\n<th>a</th>\n<th>b</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>c</td>\n<td></td>\n</tr>\n</tbody>\n</table>\n"},
	{"table count mismatch stays paragraph", "| a | b |\n| --- |\n| c |",
		"<p>| a | b |\n| --- |\n| c |</p>\n"},
	{"table escaped pipe", "| a \\| b | c |\n| --- | --- |",
		"<table>\n<thead>\n<tr>\n<th>a | b</th>\n<th>c</th>\n</tr>\n</thead>\n</table>\n"},
	{"table cells hold inline", "| *a* | `b` |\n| --- | --- |",
		"<table>\n<thead>\n<tr>\n<th><em>a</em></th>\n<th><code>b</code></th>\n</tr>\n</thead>\n</table>\n"},
	{"table code span escaped pipe", "| f\\|oo |\n| --- |\n| b `\\|` az |",
		"<table>\n<thead>\n<tr>\n<th>f|oo</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>b <code>|</code> az</td>\n</tr>\n</tbody>\n</table>\n"},
	{"table breaks at blank", "| a |\n| --- |\n| b |\n\nparagraph",
		"<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>b</td>\n</tr>\n</tbody>\n</table>\n<p>paragraph</p>\n"},
	{"table interrupted by heading", "| a |\n| --- |\n| b |\n# h",
		"<table>\n<thead>\n<tr>\n<th>a</th>\n</tr>\n</thead>\n<tbody>\n<tr>\n<td>b</td>\n</tr>\n</tbody>\n</table>\n<h1>h</h1>\n"},
	{"table interrupts paragraph", "a | b\n--- | ---",
		"<table>\n<thead>\n<tr>\n<th>a</th>\n<th>b</th>\n</tr>\n</thead>\n</table>\n"},
	{"table splits paragraph", "foo\na | b\n--- | ---",
		"<p>foo</p>\n<table>\n<thead>\n<tr>\n<th>a</th>\n<th>b</th>\n</tr>\n</thead>\n</table>\n"},
	{"setext without pipes stays", "abc\n---", "<h2>abc</h2>\n"},

	// Strikethrough.
	{"strikethrough double tilde", "~~foo~~", "<p><del>foo</del></p>\n"},
	{"strikethrough single tilde", "~foo~", "<p><del>foo</del></p>\n"},
	{"strikethrough unmatched pair", "~~foo~", "<p>~<del>foo</del></p>\n"},
	{"strikethrough intraword", "foo~~bar~~baz", "<p>foo<del>bar</del>baz</p>\n"},
	{"tilde spaced stays literal", "a ~ b", "<p>a ~ b</p>\n"},

	// Task lists.
	{"task checked", "- [x] foo", "<ul>\n<li><input checked=\"\" disabled=\"\" type=\"checkbox\"> foo</li>\n</ul>\n"},
	{"task unchecked", "- [ ] foo", "<ul>\n<li><input disabled=\"\" type=\"checkbox\"> foo</li>\n</ul>\n"},
	{"task uppercase x", "- [X] foo", "<ul>\n<li><input checked=\"\" disabled=\"\" type=\"checkbox\"> foo</li>\n</ul>\n"},
	{"task needs a space", "- [x]foo", "<ul>\n<li>[x]foo</li>\n</ul>\n"},
	{"task list of two", "- [x] foo\n- [ ] bar",
		"<ul>\n<li><input checked=\"\" disabled=\"\" type=\"checkbox\"> foo</li>\n<li><input disabled=\"\" type=\"checkbox\"> bar</li>\n</ul>\n"},
	{"task nested", "- [x] foo\n  - [ ] bar",
		"<ul>\n<li><input checked=\"\" disabled=\"\" type=\"checkbox\"> foo\n<ul>\n<li><input disabled=\"\" type=\"checkbox\"> bar</li>\n</ul>\n</li>\n</ul>\n"},
	{"task in loose list", "- [x] foo\n\n- [ ] bar",
		"<ul>\n<li>\n<p><input checked=\"\" disabled=\"\" type=\"checkbox\"> foo</p>\n</li>\n<li>\n<p><input disabled=\"\" type=\"checkbox\"> bar</p>\n</li>\n</ul>\n"},
}

func TestGFMCorpus(t *testing.T) {
	for _, tc := range gfmCorpus {
		t.Run(tc.name, func(t *testing.T) {
			got := string(RenderHTML([]byte(tc.input)))
			if got != tc.want {
				t.Errorf("input %q\ngot:  %q\nwant: %q", tc.input, got, tc.want)
			}
		})
	}
}