package sqlite

import (
	"database/sql"
	"fmt"
	"path/filepath"
	"strings"
	"testing"

	_ "modernc.org/sqlite"

	"gitea.k3s.k0.nu/tools/photocli/internal/manifest/types"
)

func TestStoreOpenAppendSQLError(t *testing.T) {
	dir := t.TempDir()
	m, err := Load(dir)
	if err != nil {
		t.Fatal(err)
	}
	m.SetOpen(func(driverName, dataSourceName string) (*sql.DB, error) {
		return nil, fmt.Errorf("simulated open error")
	})
	if err := m.OpenAppend(); err == nil {
		t.Error("expected error from sql.Open failure")
	}
}

func TestStoreOpenAppendCreateTableError(t *testing.T) {
	dir := t.TempDir()
	m, err := Load(dir)
	if err != nil {
		t.Fatal(err)
	}
	realOpen := m.open
	m.SetOpen(func(driverName, dataSourceName string) (*sql.DB, error) {
		db, err := realOpen(driverName, dataSourceName)
		if err != nil {
			return nil, err
		}
		db.Close()
		return db, nil
	})
	if err := m.OpenAppend(); err == nil {
		t.Error("expected error from closed DB CREATE TABLE")
	}
}

func TestStoreHasAfterClose(t *testing.T) {
	dir := t.TempDir()
	m, err := Load(dir)
	if err != nil {
		t.Fatal(err)
	}
	if err := m.OpenAppend(); err != nil {
		t.Fatal(err)
	}
	m.Add("x1", "photo.jpg", 1024, "local")
	m.Close()
	if m.Has("x1") {
		t.Error("Has should return false after Close")
	}
}

func TestStoreEntriesAfterClose(t *testing.T) {
	dir := t.TempDir()
	m, err := Load(dir)
	if err != nil {
		t.Fatal(err)
	}
	if err := m.OpenAppend(); err != nil {
		t.Fatal(err)
	}
	m.Add("x1", "photo.jpg", 1024, "local")
	m.Close()
	entries := m.Entries()
	if entries != nil {
		t.Errorf("Entries should return nil after Close, got %d entries", len(entries))
	}
}

func TestStoreOpenAppendMkdirAllError(t *testing.T) {
	m, err := Load("/proc/cannot-write")
	if err != nil {
		t.Fatal(err)
	}
	if err := m.OpenAppend(); err == nil {
		t.Error("expected error creating dir under /proc")
		m.Close()
	}
}

func TestStoreOpenAppendNilOpener(t *testing.T) {
	dir := t.TempDir()
	m, err := Load(dir)
	if err != nil {
		t.Fatal(err)
	}
	m.open = nil
	if err := m.OpenAppend(); err != nil {
		t.Errorf("expected nil opener to use sql.Open fallback, got err: %v", err)
	}
	m.Close()
}

func TestStoreOpenAppendCreateIndexError(t *testing.T) {
	dir := t.TempDir()
	m, err := Load(dir)
	if err != nil {
		t.Fatal(err)
	}
	realOpen := m.open
	m.open = func(driverName, dataSourceName string) (*sql.DB, error) {
		db, err := realOpen(driverName, dataSourceName)
		if err != nil {
			return nil, err
		}
		db.Close()
		return db, nil
	}
	if err := m.OpenAppend(); err == nil {
		t.Error("expected error from closed DB")
	}
}

func TestStoreHasQueryError(t *testing.T) {
	dir := t.TempDir()
	m, err := Load(dir)
	if err != nil {
		t.Fatal(err)
	}
	if err := m.OpenAppend(); err != nil {
		t.Fatal(err)
	}
	m.Add("x1", "photo.jpg", 1024, "local")
	closedDB := m.DB()
	closedDB.Close()
	if m.Has("x1") {
		t.Error("Has should return false with broken DB connection")
	}
}

func TestStoreEntriesQueryError(t *testing.T) {
	dir := t.TempDir()
	m, err := Load(dir)
	if err != nil {
		t.Fatal(err)
	}
	if err := m.OpenAppend(); err != nil {
		t.Fatal(err)
	}
	m.Add("x1", "photo.jpg", 1024, "local")
	closedDB := m.DB()
	closedDB.Close()
	entries := m.Entries()
	if entries == nil {
		t.Error("Entries should return non-nil map with broken DB connection")
	}
	if len(entries) != 0 {
		t.Errorf("Entries should be empty with broken DB connection, got %d", len(entries))
	}
}

func TestStoreHasQueryErrorWithOpenDB(t *testing.T) {
	dir := t.TempDir()
	m, err := Load(dir)
	if err != nil {
		t.Fatal(err)
	}
	if err := m.OpenAppend(); err != nil {
		t.Fatal(err)
	}
	m.Add("x1", "photo.jpg", 1024, "local")
	closedDB := m.DB()
	closedDB.Close()
	if m.Has("x1") {
		t.Error("Has should return false with closed DB")
	}
}

func TestStoreEntriesQueryErrorWithOpenDB(t *testing.T) {
	dir := t.TempDir()
	m, err := Load(dir)
	if err != nil {
		t.Fatal(err)
	}
	if err := m.OpenAppend(); err != nil {
		t.Fatal(err)
	}
	m.Add("x1", "photo.jpg", 1024, "local")
	closedDB := m.DB()
	closedDB.Close()
	entries := m.Entries()
	if entries != nil && len(entries) != 0 {
		t.Errorf("Entries should be empty with closed DB, got %d", len(entries))
	}
}

func TestStoreCreateIndexError(t *testing.T) {
	dir := t.TempDir()
	m, err := Load(dir)
	if err != nil {
		t.Fatal(err)
	}
	realOpen := m.open
	m.open = func(driverName, dataSourceName string) (*sql.DB, error) {
		db, err := realOpen(driverName, dataSourceName)
		if err != nil {
			return nil, err
		}
		m.SetExecFunc(func(query string, args ...any) (sql.Result, error) {
			if strings.Contains(query, "CREATE INDEX") {
				return nil, fmt.Errorf("injected CREATE INDEX error")
			}
			return db.Exec(query, args...)
		})
		return db, nil
	}
	if err := m.OpenAppend(); err == nil {
		t.Error("expected error from CREATE INDEX")
		m.Close()
	}
}

func TestAddEntryDefaultsPath(t *testing.T) {
	dir := t.TempDir()
	m, err := Load(dir)
	if err != nil {
		t.Fatal(err)
	}
	if err := m.OpenAppend(); err != nil {
		t.Fatal(err)
	}
	m.AddEntry(types.Entry{ID: "x1", Filename: "file.jpg", Size: 3, Cloud: "local", Checksum: "sha256:def"})
	if _, err := m.DB().Exec(`UPDATE downloads SET path = '' WHERE id = 'x1'`); err != nil {
		t.Fatal(err)
	}
	sloaded := m.Entries()["x1"]
	if got := sloaded.Path; got != "file.jpg" {
		t.Fatalf("sqlite path = %q", got)
	}
	if sloaded.Checksum != "sha256:def" {
		t.Fatalf("sqlite checksum = %q", sloaded.Checksum)
	}
	m.Close()
}

func TestNewLogWriter(t *testing.T) {
	dir := t.TempDir()
	dbPath := filepath.Join(dir, "test.db")
	db, err := sql.Open("sqlite", dbPath)
	if err != nil {
		t.Fatal(err)
	}
	defer db.Close()

	lw, err := NewLogWriter(db)
	if err != nil {
		t.Fatal(err)
	}

	lw.Log(types.LogEntry{
		Timestamp:  1700000000,
		Level:      "info",
		Event:      "export_done",
		AssetID:    "asset-1",
		Album:      "Favorites",
		Filename:   "photo.jpg",
		Size:       1024,
		Cloud:      "local",
		DurationMs: 500,
	})
	lw.Log(types.LogEntry{
		Timestamp: 1700000001,
		Level:     "error",
		Event:     "export_fail",
		AssetID:   "asset-2",
		Filename:  "bad.jpg",
		Message:   "timeout",
	})
	lw.Close()

	var count int
	err = db.QueryRow(`SELECT COUNT(*) FROM logs`).Scan(&count)
	if err != nil {
		t.Fatal(err)
	}
	if count != 2 {
		t.Errorf("expected 2 log entries, got %d", count)
	}

	var event, level, assetID string
	err = db.QueryRow(`SELECT event, level, asset_id FROM logs WHERE asset_id = 'asset-1'`).Scan(&event, &level, &assetID)
	if err != nil {
		t.Fatal(err)
	}
	if event != "export_done" || level != "info" || assetID != "asset-1" {
		t.Errorf("unexpected row: event=%s level=%s asset_id=%s", event, level, assetID)
	}
}

func TestLogWriterNilDB(t *testing.T) {
	w := &LogWriter{db: nil}
	w.Log(types.LogEntry{Event: "test"})
	w.Close()
}

func TestNewLogWriterError(t *testing.T) {
	db, err := sql.Open("sqlite", filepath.Join(t.TempDir(), "test.db"))
	if err != nil {
		t.Fatal(err)
	}
	if err := db.Close(); err != nil {
		t.Fatal(err)
	}
	if _, err := NewLogWriter(db); err == nil {
		t.Error("expected error for closed db")
	}
}

func TestLogWriterCloseConcrete(t *testing.T) {
	(&LogWriter{}).Close()
}