package wiki

import (
	"os"
	"path/filepath"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func put(t *testing.T, dir, rel string) {
	t.Helper()
	full := filepath.Join(dir, rel)
	require.NoError(t, os.MkdirAll(filepath.Dir(full), 0o755))
	require.NoError(t, os.WriteFile(full, []byte("---\ntitle: x\n---\n"), 0o644))
}

func TestFindSlugs(t *testing.T) {
	dir := t.TempDir()
	put(t, dir, "wiki/sources/legacy-src.md")
	put(t, dir, "wiki/concepts/a-concept.md")
	put(t, dir, "wiki/entities/an-entity.md")
	put(t, dir, "wiki/homelab/failures/in-a-hall.md")
	put(t, dir, "wiki/web-clip/sources/a-clip.md")
	// One slug in two places: the first hit must not hide the second.
	put(t, dir, "wiki/sources/shared-slug.md")
	put(t, dir, "wiki/entities/shared-slug.md")
	put(t, dir, "wiki/aaa/facts/shared-slug.md")

	tests := []struct {
		slug string
		want []string
	}{
		{"legacy-src", []string{"wiki/sources/legacy-src.md"}},
		{"a-concept", []string{"wiki/concepts/a-concept.md"}},
		{"an-entity", []string{"wiki/entities/an-entity.md"}},
		{"in-a-hall", []string{"wiki/homelab/failures/in-a-hall.md"}},
		{"a-clip", []string{"wiki/web-clip/sources/a-clip.md"}},
		{"shared-slug", []string{"wiki/aaa/facts/shared-slug.md", "wiki/entities/shared-slug.md", "wiki/sources/shared-slug.md"}},
		{"nothing-here", nil},
	}
	for _, tt := range tests {
		t.Run(tt.slug, func(t *testing.T) {
			got, err := FindSlugs(dir, tt.slug)
			require.NoError(t, err)
			assert.Equal(t, tt.want, got)
		})
	}
}

func TestFindSlugs_NoWikiDirFindsNothing(t *testing.T) {
	got, err := FindSlugs(t.TempDir(), "x")
	require.NoError(t, err)
	assert.Empty(t, got)
}