package manifest

import (
	"fmt"
	"testing"

	jsonladapter "gitea.k3s.k0.nu/tools/photocli/internal/manifest/jsonl"
	sqliteadapter "gitea.k3s.k0.nu/tools/photocli/internal/manifest/sqlite"
	"gitea.k3s.k0.nu/tools/photocli/internal/manifest/types"
)

func TestRegistryParseFormatAliases(t *testing.T) {
	r := Default
	cases := map[string]Format{
		"jsonl":   FormatJSONL,
		"json":    FormatJSONL,
		"sqlite":  FormatSQLite,
		"db":      FormatSQLite,
		"sqlite3": FormatSQLite,
	}
	for input, want := range cases {
		got, err := r.ParseFormat(input)
		if err != nil {
			t.Fatalf("ParseFormat(%q): %v", input, err)
		}
		if got != want {
			t.Fatalf("ParseFormat(%q) = %q, want %q", input, got, want)
		}
	}
}

func TestRegistryParseFormatUnknown(t *testing.T) {
	if _, err := Default.ParseFormat("bad"); err == nil {
		t.Fatal("expected unknown format error")
	}
}

func TestRegistryOpenConvertsExistingManifest(t *testing.T) {
	dir := t.TempDir()
	m := LoadJSONL(dir)
	if err := m.OpenAppend(); err != nil {
		t.Fatal(err)
	}
	m.Add("x1", "photo.jpg", 12, "local")
	if err := m.Save(); err != nil {
		t.Fatal(err)
	}
	m.Close()

	converted, err := Default.Open(dir, FormatSQLite)
	if err != nil {
		t.Fatal(err)
	}
	defer converted.Close()
	if !converted.Has("x1") {
		t.Fatal("expected converted sqlite manifest to contain entry")
	}
	if FileExists(JSONLPath(dir)) {
		t.Fatal("expected source jsonl manifest to be removed")
	}
	if !FileExists(SQLitePath(dir)) {
		t.Fatal("expected sqlite manifest to exist")
	}
}

func TestMemoryAdapterStore(t *testing.T) {
	s := newMemoryStore()
	if s.Has("x") {
		t.Fatal("expected empty")
	}
	s.Add("x", "photo.jpg", 42, "local")
	if !s.Has("x") {
		t.Fatal("expected has after add")
	}
	s.AddEntry(Entry{ID: "y", Filename: "file.jpg"})
	if e := s.Entries()["y"]; e.Path != "file.jpg" {
		t.Fatal("expected default path")
	}
	if err := s.Save(); err != nil {
		t.Fatal(err)
	}
	s.Close()
	if err := s.OpenAppend(); err != nil {
		t.Fatal(err)
	}

	adapter := MemoryAdapter{}
	if adapter.Format() != FormatJSONL {
		t.Fatal("expected JSONL format")
	}
	if len(adapter.Aliases()) != 0 {
		t.Fatal("expected no aliases")
	}
	if adapter.Path("") != "" {
		t.Fatal("expected empty path")
	}
	if adapter.Exists("") {
		t.Fatal("expected not to exist")
	}
	m, err := adapter.Open(t.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	m.Close()
	w, err := adapter.OpenLogWriter(nil, t.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	w.Close()
}

func TestRegistryOpenLogWriterUsesAdapter(t *testing.T) {
	dir := t.TempDir()
	m, err := Default.Open(dir, FormatJSONL)
	if err != nil {
		t.Fatal(err)
	}
	defer m.Close()
	w, err := Default.OpenLogWriter(m, dir, FormatJSONL)
	if err != nil {
		t.Fatal(err)
	}
	w.Close()
	if !FileExists(LogPath(dir)) {
		t.Fatal("expected jsonl adapter to create file log")
	}
}

func TestRegistryOpenCreatesRequestedAdapter(t *testing.T) {
	dir := t.TempDir()
	m, err := Default.Open(dir, FormatJSONL)
	if err != nil {
		t.Fatal(err)
	}
	defer m.Close()
	if _, ok := m.(*jsonladapter.Store); !ok {
		t.Fatalf("expected jsonl store, got %T", m)
	}
}

func TestRegistryUnknownAdapterErrors(t *testing.T) {
	r := NewRegistry(JSONLAdapter)
	if _, err := r.Open(t.TempDir(), FormatSQLite); err == nil {
		t.Fatal("expected open error for unregistered format")
	}
	if _, err := r.OpenLogWriter(LoadJSONL(t.TempDir()), t.TempDir(), FormatSQLite); err == nil {
		t.Fatal("expected log writer error for unregistered format")
	}
}

func TestSQLiteAdapterOpenLogWriterUsesSQLite(t *testing.T) {
	dir := t.TempDir()
	m, err := LoadSQLite(dir)
	if err != nil {
		t.Fatal(err)
	}
	if err := m.OpenAppend(); err != nil {
		t.Fatal(err)
	}
	defer m.Close()
	w, err := SQLiteAdapter.OpenLogWriter(m, dir)
	if err != nil {
		t.Fatal(err)
	}
	defer w.Close()
	if _, ok := w.(*sqliteadapter.LogWriter); !ok {
		t.Fatalf("expected sqlite log writer, got %T", w)
	}
}

func TestOpenLogWriterUsesManifestFormat(t *testing.T) {
	dir := t.TempDir()
	m, err := LoadSQLite(dir)
	if err != nil {
		t.Fatal(err)
	}
	if err := m.OpenAppend(); err != nil {
		t.Fatal(err)
	}
	defer m.Close()
	w, err := OpenLogWriter(m, dir)
	if err != nil {
		t.Fatal(err)
	}
	defer w.Close()
	if _, ok := w.(*sqliteadapter.LogWriter); !ok {
		t.Fatalf("expected sqlite log writer, got %T", w)
	}
}

func TestSQLiteAdapterOpenLogWriterFallsBackToFile(t *testing.T) {
	dir := t.TempDir()
	w, err := SQLiteAdapter.OpenLogWriter(LoadJSONL(dir), dir)
	if err != nil {
		t.Fatal(err)
	}
	w.Close()
	if !FileExists(LogPath(dir)) {
		t.Fatal("expected sqlite adapter fallback to create file log")
	}
}

func TestSetJSONLSaveHookWrapper(t *testing.T) {
	old := SetJSONLSaveHook(func() error { return nil })
	SetJSONLSaveHook(old)
}

func TestConvertManifestErrorBranches(t *testing.T) {
	dir := t.TempDir()
	if _, err := ConvertManifest(dir, failingAdapter{format: FormatJSONL, openErr: fmt.Errorf("boom")}, JSONLAdapter); err == nil {
		t.Fatal("expected source open error")
	}
	if _, err := ConvertManifest(dir, staticAdapter{format: FormatJSONL, store: badOpenManifest{}}, JSONLAdapter); err == nil {
		t.Fatal("expected source OpenAppend error")
	}
	if _, err := ConvertManifest(dir, staticAdapter{format: FormatJSONL, store: noReadManifest{}}, JSONLAdapter); err == nil {
		t.Fatal("expected entry reader error")
	}
	if _, err := ConvertManifest(dir, staticAdapter{format: FormatJSONL, store: readableManifest{}}, failingAdapter{format: FormatSQLite, openErr: fmt.Errorf("boom")}); err == nil {
		t.Fatal("expected destination open error")
	}
	if _, err := ConvertManifest(dir, staticAdapter{format: FormatJSONL, store: readableManifest{}}, staticAdapter{format: FormatSQLite, store: badOpenManifest{}}); err == nil {
		t.Fatal("expected destination OpenAppend error")
	}
	oldRemove := types.RemoveFunc()
	types.SetRemoveFunc(func(string) error { return fmt.Errorf("remove failed") })
	defer func() { types.SetRemoveFunc(oldRemove) }()
	if _, err := ConvertManifest(dir, staticAdapter{format: FormatJSONL, store: readableManifest{}}, staticAdapter{format: FormatSQLite, store: readableManifest{}}); err == nil {
		t.Fatal("expected remove error")
	}
}

type staticAdapter struct {
	format Format
	store  Manifest
}

func (a staticAdapter) Format() Format                                    { return a.format }
func (a staticAdapter) Aliases() []string                                 { return nil }
func (a staticAdapter) Path(string) string                                { return "manifest.file" }
func (a staticAdapter) Exists(string) bool                                { return true }
func (a staticAdapter) Open(string) (Manifest, error)                     { return a.store, nil }
func (a staticAdapter) OpenLogWriter(Manifest, string) (LogWriter, error) { return NoopLogWriter, nil }

type failingAdapter struct {
	format  Format
	openErr error
}

func (a failingAdapter) Format() Format                                    { return a.format }
func (a failingAdapter) Aliases() []string                                 { return nil }
func (a failingAdapter) Path(string) string                                { return "manifest.file" }
func (a failingAdapter) Exists(string) bool                                { return true }
func (a failingAdapter) Open(string) (Manifest, error)                     { return nil, a.openErr }
func (a failingAdapter) OpenLogWriter(Manifest, string) (LogWriter, error) { return nil, a.openErr }

type readableManifest struct{}

func (readableManifest) Has(string) bool                   { return false }
func (readableManifest) Add(string, string, int64, string) {}
func (readableManifest) AddEntry(Entry)                    {}
func (readableManifest) Save() error                       { return nil }
func (readableManifest) Close()                            {}
func (readableManifest) OpenAppend() error                 { return nil }
func (readableManifest) Entries() map[string]Entry         { return map[string]Entry{"x": {Filename: "x.jpg"}} }

type noReadManifest struct{}

func (noReadManifest) Has(string) bool                   { return false }
func (noReadManifest) Add(string, string, int64, string) {}
func (noReadManifest) AddEntry(Entry)                    {}
func (noReadManifest) Save() error                       { return nil }
func (noReadManifest) Close()                            {}
func (noReadManifest) OpenAppend() error                 { return nil }
func (noReadManifest) Entries() map[string]Entry         { return nil }

type badOpenManifest struct{ readableManifest }

func (badOpenManifest) OpenAppend() error { return fmt.Errorf("open failed") }