import { LazyStore } from '@tauri-apps/plugin-store';
import { writable, type Writable } from 'svelte/store';

// Device sync settings interface
export type OverwriteMode = 'skip' | 'different' | 'always';

export interface DeviceSyncSettings {
  musicPath: string | null;
  playlistsPath: string | null;
  overwriteMode: OverwriteMode;
}

// Initialize the store with device-sync.json
const store = new LazyStore('device-sync.json');

// Default settings
const defaultSettings: DeviceSyncSettings = {
  musicPath: null,
  playlistsPath: null,
  overwriteMode: 'different'
};

// Create a writable store for reactive UI updates
export const deviceSyncSettings: Writable<DeviceSyncSettings> = writable(defaultSettings);

// Load settings from store
export async function loadDeviceSyncSettings(): Promise<void> {
  const musicPath = await store.get<string>('musicPath');
  const playlistsPath = await store.get<string>('playlistsPath');
  const overwriteMode = await store.get<OverwriteMode>('overwriteMode');

  deviceSyncSettings.set({
    musicPath: musicPath ?? null,
    playlistsPath: playlistsPath ?? null,
    overwriteMode: overwriteMode ?? 'different'
  });
}

// Save device music path setting
export async function setMusicPath(path: string | null): Promise<void> {
  if (path) {
    await store.set('musicPath', path);
  } else {
    await store.delete('musicPath');
  }
  await store.save();

  deviceSyncSettings.update(s => ({
    ...s,
    musicPath: path
  }));
}

// Save device playlists path setting
export async function setPlaylistsPath(path: string | null): Promise<void> {
  if (path) {
    await store.set('playlistsPath', path);
  } else {
    await store.delete('playlistsPath');
  }
  await store.save();

  deviceSyncSettings.update(s => ({
    ...s,
    playlistsPath: path
  }));
}

// Save overwrite mode setting
export async function setOverwriteMode(mode: OverwriteMode): Promise<void> {
  await store.set('overwriteMode', mode);
  await store.save();

  deviceSyncSettings.update(s => ({
    ...s,
    overwriteMode: mode
  }));
}

// Initialize settings on import
loadDeviceSyncSettings();