import { InquiryType } from '../common/enums/inquiry-type.enum';
import { ProviderName } from '../common/enums/provider-name.enum';

export type AuthMethod = 'AMITIS' | 'SOAP' | 'OAUTH2' | 'NONE';

export interface InquiryConfig {
  url: string;
  username: string;
  password: string;
  apiKey: string;
  authMethod: AuthMethod;
}

export interface ProviderEnvConfig {
  enabled: boolean;
  timeout: number;
  maxRetries: number;
  inquiries: Partial<Record<InquiryType, InquiryConfig>>;
}

export interface AmitisAuthServiceConfig {
  baseUrl: string;
  loginPath: string;
  refreshPath: string;
  tokenTimeZone: string;
  timeout: number;
  enabled: boolean;
}

export interface TejaratNouConfig {
  enabled: boolean;
  timeout: number;
  maxRetries: number;
  authUrl: string;
  clientId: string;
  clientSecret: string;
  username: string;
  password: string;
  inquiries: Partial<Record<InquiryType, InquiryConfig>>;
}

export interface InquiryRoutingConfig {
  defaultProvider: ProviderName;
  fallbackEnabled: boolean;
  fallbackProviders: ProviderName[];
}

/**
 * Central configuration factory — maps environment variables to typed config.
 * Provider routing is deployment-specific and lives under inquiryRouting.
 */
export default () => ({
  app: {
    port: parseInt(process.env.PORT ?? '8085', 10),
    nodeEnv: process.env.NODE_ENV ?? 'development',
  },
  mongodb: {
    uri: process.env.MONGODB_URI ?? 'mongodb://localhost:27017/inquiry-gateway',
  },
  auth: {
    apiKey: process.env.API_KEY ?? '',
    jwtSecret: process.env.JWT_SECRET ?? 'change-me-in-production',
    jwtRefreshSecret: process.env.JWT_REFRESH_SECRET ?? process.env.JWT_SECRET ?? 'change-me-refresh',
    jwtAccessExpiresIn: process.env.JWT_ACCESS_EXPIRES_IN ?? '15m',
    jwtRefreshExpiresIn: process.env.JWT_REFRESH_EXPIRES_IN ?? '7d',
    jwtEnabled: process.env.JWT_ENABLED !== 'false',
    bcryptSaltRounds: parseInt(process.env.BCRYPT_SALT_ROUNDS ?? '12', 10),
  },
  throttle: {
    ttl: parseInt(process.env.THROTTLE_TTL ?? '60', 10),
    limit: parseInt(process.env.THROTTLE_LIMIT ?? '100', 10),
  },
  amitis: {
    baseUrl: process.env.AMITIS_BASE_URL ?? 'https://auth.services.centinsur.ir',
    loginPath: process.env.AMITIS_LOGIN_PATH ?? '/api/security/login',
    refreshPath: process.env.AMITIS_REFRESH_PATH ?? '/api/security/RefreshToken',
    tokenTimeZone: process.env.AMITIS_TOKEN_TIME_ZONE ?? 'Asia/Tehran',
    timeout: parseInt(process.env.AMITIS_TIMEOUT ?? '10000', 10),
    enabled: process.env.AMITIS_ENABLED !== 'false',
  } satisfies AmitisAuthServiceConfig,
  hamta: buildProviderConfig('HAMTA'),
  moallem: buildProviderConfig('MOALLEM'),
  parsian: buildProviderConfig('PARSIAN'),
  tejaratnou: {
    enabled: process.env.TEJARATNOU_ENABLED !== 'false',
    timeout: parseInt(process.env.TEJARATNOU_TIMEOUT ?? '15000', 10),
    maxRetries: parseInt(process.env.TEJARATNOU_MAX_RETRIES ?? '2', 10),
    authUrl: process.env.TEJARATNOU_AUTH_URL ?? 'https://accounts.tejaratnoins.ir',
    clientId: process.env.TEJARATNOU_CLIENT_ID ?? 'api-gateway',
    clientSecret: process.env.TEJARATNOU_CLIENT_SECRET ?? '',
    username: process.env.TEJARATNOU_USERNAME ?? '',
    password: process.env.TEJARATNOU_PASSWORD ?? '',
    inquiries: {
      [InquiryType.PERSON]: buildInquiryConfig('TEJARATNOU', 'PERSON'),
    },
  } satisfies TejaratNouConfig,
  inquiryRouting: {
    [InquiryType.PERSON]: buildInquiryRoutingConfig('PERSON', ProviderName.PARSIAN, [
      ProviderName.HAMTA,
      ProviderName.TEJARATNOU,
    ]),
    [InquiryType.REAL_ESTATE]: buildInquiryRoutingConfig('REAL_ESTATE', ProviderName.HAMTA, [
      ProviderName.MOALLEM,
    ]),
    [InquiryType.SHEBA]: buildInquiryRoutingConfig('SHEBA', ProviderName.PARSIAN, [
      ProviderName.HAMTA,
    ]),
    [InquiryType.SHAHKAR]: buildInquiryRoutingConfig('SHAHKAR', ProviderName.PARSIAN, [
      ProviderName.HAMTA,
    ]),
    [InquiryType.POSTAL_CODE]: buildInquiryRoutingConfig('POSTAL_CODE', ProviderName.MOALLEM, [
      ProviderName.HAMTA,
    ]),
    [InquiryType.LEGAL_PERSON]: buildInquiryRoutingConfig('LEGAL_PERSON', ProviderName.HAMTA, [
      ProviderName.MOALLEM,
    ]),
    [InquiryType.CAR_PLATE]: buildInquiryRoutingConfig('CAR_PLATE', ProviderName.HAMTA, []),
    [InquiryType.POLICY_BY_CHASSIS]: buildInquiryRoutingConfig(
      'POLICY_BY_CHASSIS',
      ProviderName.PARSIAN,
      [],
    ),
    [InquiryType.POLICY_BY_PLATE]: buildInquiryRoutingConfig(
      'POLICY_BY_PLATE',
      ProviderName.PARSIAN,
      [],
    ),
    [InquiryType.POLICY_BY_NATIONAL_CODE]: buildInquiryRoutingConfig(
      'POLICY_BY_NATIONAL_CODE',
      ProviderName.PARSIAN,
      [],
    ),
  } satisfies Record<InquiryType, InquiryRoutingConfig>,
});

function buildProviderConfig(prefix: string): ProviderEnvConfig {
  const inquiryTypes = [
    InquiryType.PERSON,
    InquiryType.REAL_ESTATE,
    InquiryType.SHAHKAR,
    InquiryType.SHEBA,
    InquiryType.POSTAL_CODE,
    InquiryType.LEGAL_PERSON,
    InquiryType.CAR_PLATE,
    InquiryType.POLICY_BY_CHASSIS,
    InquiryType.POLICY_BY_PLATE,
    InquiryType.POLICY_BY_NATIONAL_CODE,
  ];

  const inquiries: Partial<Record<InquiryType, InquiryConfig>> = {};
  
  for (const inquiryType of inquiryTypes) {
    const inquiryConfig = buildInquiryConfig(prefix, inquiryTypeToEnvName(inquiryType));
    if (inquiryConfig.url || inquiryConfig.username) {
      inquiries[inquiryType] = inquiryConfig;
    }
  }

  return {
    enabled: process.env[`${prefix}_ENABLED`] !== 'false',
    timeout: parseInt(process.env[`${prefix}_TIMEOUT`] ?? '10000', 10),
    maxRetries: parseInt(process.env[`${prefix}_MAX_RETRIES`] ?? '2', 10),
    inquiries,
  };
}

function buildInquiryConfig(providerPrefix: string, inquiryPrefix: string): InquiryConfig {
  return {
    url: process.env[`${providerPrefix}_${inquiryPrefix}_URL`] ?? '',
    username: process.env[`${providerPrefix}_${inquiryPrefix}_USERNAME`] ?? '',
    password: process.env[`${providerPrefix}_${inquiryPrefix}_PASSWORD`] ?? '',
    apiKey: process.env[`${providerPrefix}_${inquiryPrefix}_API_KEY`] ?? '',
    authMethod: (process.env[`${providerPrefix}_${inquiryPrefix}_AUTH_METHOD`] ?? 'NONE') as AuthMethod,
  };
}

function inquiryTypeToEnvName(inquiryType: InquiryType): string {
  const mapping: Record<InquiryType, string> = {
    [InquiryType.PERSON]: 'PERSON',
    [InquiryType.REAL_ESTATE]: 'REAL_ESTATE',
    [InquiryType.SHAHKAR]: 'SHAHKAR',
    [InquiryType.SHEBA]: 'SHEBA',
    [InquiryType.POSTAL_CODE]: 'POSTAL_CODE',
    [InquiryType.LEGAL_PERSON]: 'LEGAL_PERSON',
    [InquiryType.CAR_PLATE]: 'CAR_PLATE',
    [InquiryType.POLICY_BY_CHASSIS]: 'POLICY_BY_CHASSIS',
    [InquiryType.POLICY_BY_PLATE]: 'POLICY_BY_PLATE',
    [InquiryType.POLICY_BY_NATIONAL_CODE]: 'POLICY_BY_NATIONAL_CODE',
  };
  return mapping[inquiryType];
}

function buildInquiryRoutingConfig(
  prefix: string,
  defaultProvider: ProviderName,
  fallbackProviders: ProviderName[],
): InquiryRoutingConfig {
  return {
    defaultProvider: (process.env[`${prefix}_DEFAULT_PROVIDER`] ?? defaultProvider) as ProviderName,
    fallbackEnabled: parseBoolean(process.env[`${prefix}_FALLBACK_ENABLED`], false),
    fallbackProviders: parseProviderList(
      process.env[`${prefix}_FALLBACK_PROVIDERS`] ?? fallbackProviders.join(','),
    ),
  };
}

function parseProviderList(value: string): ProviderName[] {
  if (!value.trim()) return [];
  return value.split(',').map((p) => p.trim() as ProviderName);
}

function parseBoolean(value: string | undefined, defaultValue: boolean): boolean {
  if (value === undefined) return defaultValue;
  return value.toLowerCase() === 'true';
}

// Made with Bob