package discovery

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

func writeTree(t *testing.T, root string, files map[string]string) {
	t.Helper()
	for rel, content := range files {
		p := filepath.Join(root, filepath.FromSlash(rel))
		os.MkdirAll(filepath.Dir(p), 0o755)
		os.WriteFile(p, []byte(content), 0o644)
	}
}

func TestScanNestedSkillCategories(t *testing.T) {
	dir := t.TempDir()
	writeTree(t, dir, map[string]string{
		"skills/flat-skill/SKILL.md":            "---\nname: Flat\n---\n",
		"skills/engineering/tdd/SKILL.md":       "---\nname: TDD\n---\n",
		"skills/productivity/grill-me/SKILL.md": "---\nname: Grill Me\n---\n",
		"skills/engineering/tdd/reference.md":   "extra artifact",
		"skills/deprecated/old/README.md":       "no skill here",
		"commands/deploy.md":                    "---\nname: Deploy\n---\n",
	})

	items, err := Scan(&FsTree{Root: dir}, Config{})
	if err != nil {
		t.Fatal(err)
	}
	got := map[string]Item{}
	for _, it := range items {
		got[it.UpstreamID] = it
	}
	for _, want := range []string{"flat-skill", "tdd", "grill-me"} {
		it, ok := got[want]
		if !ok {
			t.Fatalf("skill %q not discovered (items: %+v)", want, items)
		}
		if it.Type != "skills" {
			t.Errorf("%q type = %q", want, it.Type)
		}
	}
	if _, ok := got["old"]; ok {
		t.Error("folder without SKILL.md must not be a skill")
	}
	tdd := got["tdd"]
	if tdd.RelPath != "skills/engineering/tdd" {
		t.Errorf("tdd RelPath = %q", tdd.RelPath)
	}
	if got["deploy"].Type != "commands" {
		t.Error("flat command types must still be discovered")
	}
}

func TestScanOuterSkillWinsOverNested(t *testing.T) {
	dir := t.TempDir()
	writeTree(t, dir, map[string]string{
		"skills/bundle/SKILL.md":            "---\nname: Bundle\n---\n",
		"skills/bundle/inner/SKILL.md":      "---\nname: Inner\n---\n",
		"skills/bundle/inner/deep/SKILL.md": "---\nname: Deep\n---\n",
	})

	items, err := Scan(&FsTree{Root: dir}, Config{})
	if err != nil {
		t.Fatal(err)
	}
	if len(items) != 1 || items[0].UpstreamID != "bundle" {
		t.Fatalf("outermost skill must win, got %+v", items)
	}
}