import * as plugins from './bunq.plugins.js';
import { BunqApiContext } from './bunq.classes.apicontext.js';
import { BunqMonetaryAccount } from './bunq.classes.monetaryaccount.js';
import { BunqUser } from './bunq.classes.user.js';
import { BunqApiError } from './bunq.classes.httpclient.js';
import type { IBunqSessionServerResponse } from './bunq.interfaces.js';

export interface IBunqConstructorOptions {
  deviceName: string;
  apiKey: string;
  environment: 'SANDBOX' | 'PRODUCTION';
  permittedIps?: string[];
  isOAuthToken?: boolean; // Set to true when using OAuth access token instead of API key
}

/**
 * the main bunq account
 */
export class BunqAccount {
  // Static cache for OAuth token sessions to prevent multiple authentication attempts
  private static oauthSessionCache = new Map<string, BunqApiContext>();
  
  public options: IBunqConstructorOptions;
  public apiContext: BunqApiContext;
  public userId: number;
  public userType: 'UserPerson' | 'UserCompany' | 'UserApiKey';
  
  private bunqUser: BunqUser;

  constructor(optionsArg: IBunqConstructorOptions) {
    this.options = optionsArg;
  }

  /**
   * Initialize the bunq account
   */
  public async init() {
    // For OAuth tokens, check if we already have a cached session
    if (this.options.isOAuthToken) {
      const cacheKey = `${this.options.apiKey}_${this.options.environment}`;
      const cachedContext = BunqAccount.oauthSessionCache.get(cacheKey);
      
      if (cachedContext && cachedContext.hasValidSession()) {
        // Reuse existing session
        this.apiContext = cachedContext;
        console.log('Reusing existing OAuth session from cache');
      } else {
        // Create new context and cache it
        this.apiContext = new BunqApiContext({
          apiKey: this.options.apiKey,
          environment: this.options.environment,
          deviceDescription: this.options.deviceName,
          permittedIps: this.options.permittedIps,
          isOAuthToken: this.options.isOAuthToken
        });
        
        try {
          await this.apiContext.init();
          // Cache the successfully initialized context
          BunqAccount.oauthSessionCache.set(cacheKey, this.apiContext);
        } catch (error) {
          // Handle "Superfluous authentication" or "Authentication token already has a user session" errors
          if (error instanceof BunqApiError) {
            const errorMessages = error.errors.map(e => e.error_description).join(' ');
            if (errorMessages.includes('Superfluous authentication') ||
                errorMessages.includes('Authentication token already has a user session')) {
              console.log('OAuth token already has installation/device, attempting to create new session...');
              // Try to create a new session with existing installation/device
              await this.apiContext.initWithExistingInstallation();
              // Cache the context with new session
              BunqAccount.oauthSessionCache.set(cacheKey, this.apiContext);
            } else {
              throw error;
            }
          } else {
            throw error;
          }
        }
      }
    } else {
      // Regular API key flow
      this.apiContext = new BunqApiContext({
        apiKey: this.options.apiKey,
        environment: this.options.environment,
        deviceDescription: this.options.deviceName,
        permittedIps: this.options.permittedIps,
        isOAuthToken: this.options.isOAuthToken
      });

      await this.apiContext.init();
    }

    // Create user instance
    this.bunqUser = new BunqUser(this.apiContext);
    
    // Get user info
    await this.getUserInfo();
  }

  /**
   * Get user information and ID
   */
  private async getUserInfo() {
    const userInfo = await this.bunqUser.getInfo();
    
    if (userInfo.UserPerson) {
      this.userId = userInfo.UserPerson.id;
      this.userType = 'UserPerson';
    } else if (userInfo.UserCompany) {
      this.userId = userInfo.UserCompany.id;
      this.userType = 'UserCompany';
    } else if (userInfo.UserApiKey) {
      this.userId = userInfo.UserApiKey.id;
      this.userType = 'UserApiKey';
    } else {
      throw new Error('Could not determine user type');
    }
  }

  /**
   * Get all monetary accounts
   */
  public async getAccounts(): Promise<BunqMonetaryAccount[]> {
    await this.apiContext.ensureValidSession();
    
    const response = await this.apiContext.getHttpClient().list(
      `/v1/user/${this.userId}/monetary-account`
    );

    const accountsArray: BunqMonetaryAccount[] = [];
    
    if (response.Response) {
      for (const apiAccount of response.Response) {
        accountsArray.push(BunqMonetaryAccount.fromAPIObject(this, apiAccount));
      }
    }

    return accountsArray;
  }

  /**
   * Get a specific monetary account
   */
  public async getAccount(accountId: number): Promise<BunqMonetaryAccount> {
    await this.apiContext.ensureValidSession();
    
    const response = await this.apiContext.getHttpClient().get(
      `/v1/user/${this.userId}/monetary-account/${accountId}`
    );

    if (response.Response && response.Response[0]) {
      return BunqMonetaryAccount.fromAPIObject(this, response.Response[0]);
    }

    throw new Error('Account not found');
  }

  /**
   * Create a sandbox user (only works in sandbox environment)
   */
  public async createSandboxUser(): Promise<string> {
    if (this.options.environment !== 'SANDBOX') {
      throw new Error('Creating sandbox users only works in sandbox environment');
    }

    // Sandbox user creation doesn't require authentication
    const response = await plugins.smartrequest.request(
      'https://public-api.sandbox.bunq.com/v1/sandbox-user-person',
      {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
          'User-Agent': 'bunq-api-client/1.0.0',
          'Cache-Control': 'no-cache'
        },
        requestBody: '{}'
      }
    );

    if (response.body.Response && response.body.Response[0] && response.body.Response[0].ApiKey) {
      return response.body.Response[0].ApiKey.api_key;
    }

    throw new Error('Failed to create sandbox user');
  }

  /**
   * Get the user instance
   */
  public getUser(): BunqUser {
    return this.bunqUser;
  }

  /**
   * Get the HTTP client
   */
  public getHttpClient() {
    return this.apiContext.getHttpClient();
  }

  /**
   * Stop the bunq account and clean up
   */
  public async stop() {
    if (this.apiContext) {
      await this.apiContext.destroy();
      this.apiContext = null;
    }
  }

  /**
   * Clear the OAuth session cache
   */
  public static clearOAuthCache(): void {
    BunqAccount.oauthSessionCache.clear();
    console.log('OAuth session cache cleared');
  }

  /**
   * Clear a specific OAuth token from the cache
   */
  public static clearOAuthCacheForToken(apiKey: string, environment: 'SANDBOX' | 'PRODUCTION'): void {
    const cacheKey = `${apiKey}_${environment}`;
    BunqAccount.oauthSessionCache.delete(cacheKey);
    console.log(`OAuth session cache cleared for token in ${environment} environment`);
  }

  /**
   * Get the current size of the OAuth cache
   */
  public static getOAuthCacheSize(): number {
    return BunqAccount.oauthSessionCache.size;
  }
}