package discovery

import "testing"

func TestParseFrontmatter(t *testing.T) {
	cases := []struct {
		name    string
		in      string
		want    Frontmatter
		warnLen int
	}{
		{
			name: "complete block",
			in:   "---\nname: Test Skill\ndescription: does things\ntags: a, b\nrequires: c,d\n---\nbody\n",
			want: Frontmatter{Name: "Test Skill", Description: "does things", Tags: []string{"a", "b"}, Requires: []string{"c", "d"}},
		},
		{
			name: "no frontmatter",
			in:   "# Just a file\nbody\n",
			want: Frontmatter{},
		},
		{
			name:    "unclosed block",
			in:      "---\nname: Broken\ndescription: never closed\n",
			want:    Frontmatter{Name: "Broken", Description: "never closed"},
			warnLen: 1,
		},
		{
			name:    "line missing colon",
			in:      "---\nname: X\nbroken line without colon\n---\n",
			want:    Frontmatter{Name: "X"},
			warnLen: 1,
		},
		{
			name: "crlf line endings",
			in:   "---\r\nname: Win\r\ndescription: windows author\r\n---\r\n",
			want: Frontmatter{Name: "Win", Description: "windows author"},
		},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			fm, warnings := ParseFrontmatter([]byte(tc.in))
			if fm.Name != tc.want.Name || fm.Description != tc.want.Description {
				t.Errorf("got %+v, want %+v", fm, tc.want)
			}
			if len(fm.Tags) != len(tc.want.Tags) || len(fm.Requires) != len(tc.want.Requires) {
				t.Errorf("tags/requires mismatch: got %+v want %+v", fm, tc.want)
			}
			if len(warnings) != tc.warnLen {
				t.Errorf("warnings = %v (len %d), want len %d", warnings, len(warnings), tc.warnLen)
			}
		})
	}
}