import preferences from '@ohos.data.preferences'
import type { SDKConfig } from './Types'

const TOKEN_KEY = 'xuqm_token'
const PREF_NAME = 'xuqm_sdk_prefs'

export class SDKContext {
  private static _config: SDKConfig | null = null
  private static _token: string | null = null
  private static _userId: string | null = null
  private static _pref: preferences.Preferences | null = null

  static init(config: SDKConfig): void {
    SDKContext._config = config
    if (config.debug) {
      console.log('[XuqmSDK] init appKey=' + config.appKey)
    }
  }

  static getConfig(): SDKConfig {
    if (!SDKContext._config) {
      throw new Error('XuqmSDK not initialized. Call XuqmSDK.init() first.')
    }
    return SDKContext._config
  }

  static async initPreferences(context: Context): Promise<void> {
    SDKContext._pref = await preferences.getPreferences(context, PREF_NAME)
    const saved = await SDKContext._pref.get(TOKEN_KEY, '') as string
    if (saved) SDKContext._token = saved
  }

  static async setToken(token: string | null): Promise<void> {
    SDKContext._token = token
    if (SDKContext._pref) {
      if (token) {
        await SDKContext._pref.put(TOKEN_KEY, token)
      } else {
        await SDKContext._pref.delete(TOKEN_KEY)
      }
      await SDKContext._pref.flush()
    }
  }

  static getToken(): string | null {
    return SDKContext._token
  }

  static setUserId(userId: string | null): void {
    SDKContext._userId = userId
  }

  static getUserId(): string | null {
    return SDKContext._userId
  }
}