package library

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

func mkTonieDir(t *testing.T, householdPath, dirName string) string {
	t.Helper()
	p := filepath.Join(householdPath, dirName)
	if err := os.MkdirAll(p, 0o755); err != nil {
		t.Fatal(err)
	}
	return p
}

func TestParseTonieDir(t *testing.T) {
	name, id, ok := ParseTonieDir("Peppa Wutz [id=ef01-5678]")
	if !ok || name != "Peppa Wutz" || id != "ef01-5678" {
		t.Fatalf("unexpected parse result: name=%q id=%q ok=%v", name, id, ok)
	}
}

func TestParseTonieDirNoMatch(t *testing.T) {
	if _, _, ok := ParseTonieDir("just a folder"); ok {
		t.Fatal("expected no match for folder without [id=...] suffix")
	}
}

func TestDirName(t *testing.T) {
	if got := DirName("Peppa/Wutz", "abc"); got != "Peppa-Wutz [id=abc]" {
		t.Fatalf("unexpected dir name: %q", got)
	}
}

func TestDiscover(t *testing.T) {
	root := t.TempDir()
	household := filepath.Join(root, "household-1")
	if err := os.MkdirAll(household, 0o755); err != nil {
		t.Fatal(err)
	}
	mkTonieDir(t, household, "Peppa Wutz [id=tonie-1]")
	mkTonieDir(t, household, "not-a-tonie-folder")

	// A second household with one tonie.
	household2 := filepath.Join(root, "household-2")
	mkTonieDir(t, household2, "Gute Nacht [id=tonie-2]")

	tonies, err := Discover(root)
	if err != nil {
		t.Fatal(err)
	}
	if len(tonies) != 2 {
		t.Fatalf("expected 2 tonies, got %d: %+v", len(tonies), tonies)
	}

	byID := map[string]Tonie{}
	for _, tn := range tonies {
		byID[tn.TonieID] = tn
	}

	got, ok := byID["tonie-1"]
	if !ok || got.HouseholdID != "household-1" || got.Name != "Peppa Wutz" {
		t.Fatalf("unexpected tonie-1 entry: %+v", got)
	}
	got2, ok := byID["tonie-2"]
	if !ok || got2.HouseholdID != "household-2" || got2.Name != "Gute Nacht" {
		t.Fatalf("unexpected tonie-2 entry: %+v", got2)
	}
}

func TestFilter(t *testing.T) {
	tonies := []Tonie{
		{HouseholdID: "h1", TonieID: "t1", Name: "Peppa Wutz"},
		{HouseholdID: "h2", TonieID: "t2", Name: "Gute Nacht"},
	}

	if got := Filter(tonies, ""); len(got) != 2 {
		t.Fatalf("empty filter should return all, got %d", len(got))
	}
	if got := Filter(tonies, "peppa"); len(got) != 1 || got[0].TonieID != "t1" {
		t.Fatalf("expected 1 match for 'peppa', got %+v", got)
	}
	if got := Filter(tonies, "h2"); len(got) != 1 || got[0].TonieID != "t2" {
		t.Fatalf("expected 1 match for 'h2', got %+v", got)
	}
	if got := Filter(tonies, "nomatch"); len(got) != 0 {
		t.Fatalf("expected no matches, got %+v", got)
	}
}