import { AxiosError, AxiosInstance } from 'axios';
import { createOutboundAxiosInstance } from '../../common/helpers/http-client.helper';
import {
  CentInsurApiResponse,
  describeCentInsurResponse,
  getCentInsurProviderError,
} from '../../common/helpers/centinsur-response.helper';
import { getSayahProviderError } from '../../common/helpers/sayah-response.helper';
import { InquiryType } from '../../common/enums/inquiry-type.enum';
import { ProviderName } from '../../common/enums/provider-name.enum';
import { ProviderExecutionContext } from '../../common/interfaces/inquiry-provider.interface';
import { BaseProvider } from '../base/base-provider.abstract';
import {
  LegacyProviderApiResponse,
} from '../interfaces/provider-config.interface';
import { ProviderEnvConfig, InquiryConfig } from '../../config/configuration';

export interface PersonInquiryPayload {
  nationalCode: string;
  birthDate: string;
  dateHasPostfix?: number;
}

export interface PersonInquiryResult {
  fullName?: string;
  nationalCode: string;
  birthDate: string;
  raw: unknown;
}

export type LegacyInquiryPayload = Record<string, unknown>;
export type LegacyInquiryResult = PersonInquiryResult | { raw: unknown };
export type LegacyAuthTokenResolver = (
  providerName: ProviderName,
  inquiryType: InquiryType,
  username: string,
  password: string,
) => Promise<string>;

/**
 * Shared implementation for providers with REST API contracts (Hamta, Moallem).
 * 
 * Supports multiple authentication methods:
 * - AMITIS: Token-based authentication via AMITIS service
 * - SOAP: Direct SOAP authentication (handled by subclasses)
 * - NONE: No authentication required
 */
export abstract class LegacyApiProvider extends BaseProvider<
  LegacyInquiryPayload,
  LegacyInquiryResult
> {
  protected readonly httpClient: AxiosInstance;
  protected readonly providerConfig: ProviderEnvConfig;

  constructor(
    config: ProviderEnvConfig,
    private readonly authTokenResolver?: LegacyAuthTokenResolver,
  ) {
    super(config);
    this.providerConfig = config;
    this.httpClient = createOutboundAxiosInstance({
      timeout: config.timeout,
      headers: {
        'Content-Type': 'application/json',
      },
    });
  }

  protected async callProvider(
    inquiryType: InquiryType,
    payload: LegacyInquiryPayload,
    _context: ProviderExecutionContext,
  ): Promise<LegacyInquiryResult> {
    if (inquiryType === InquiryType.PERSON) {
      return this.inquirePerson(payload as unknown as PersonInquiryPayload, inquiryType);
    }

    return this.inquireGeneric(inquiryType, payload);
  }

  protected async inquirePerson(
    payload: PersonInquiryPayload,
    inquiryType: InquiryType,
  ): Promise<PersonInquiryResult> {
    const inquiryConfig = this.getInquiryConfig(inquiryType);
    
    try {
      const response = await this.httpClient.post<LegacyProviderApiResponse>(
        inquiryConfig.url,
        {
          nationalCode: payload.nationalCode,
          birthDate: payload.birthDate,
        },
        await this.buildRequestConfig(inquiryType, inquiryConfig),
      );

      const body = response.data;

      if (!body.success) {
        throw this.formatProviderError(body.message, body.code);
      }

      return {
        nationalCode: payload.nationalCode,
        birthDate: payload.birthDate,
        fullName: body.data?.fullName as string | undefined,
        raw: body,
      };
    } catch (error) {
      if (error instanceof AxiosError) {
        const data = error.response?.data as LegacyProviderApiResponse | undefined;
        throw this.formatProviderError(
          data?.message ?? error.message,
          data?.code ?? String(error.response?.status ?? 'NETWORK_ERROR'),
        );
      }
      throw error;
    }
  }

  protected async inquireGeneric(
    inquiryType: InquiryType,
    payload: LegacyInquiryPayload,
  ): Promise<{ raw: unknown }> {
    const inquiryConfig = this.getInquiryConfig(inquiryType);
    
    // Transform payload for Real Estate inquiry to match CentInsur API format
    const requestPayload = this.transformPayloadForInquiryType(inquiryType, payload);
    
    try {
      const response = await this.httpClient.post<LegacyProviderApiResponse>(
        inquiryConfig.url,
        requestPayload,
        await this.buildRequestConfig(inquiryType, inquiryConfig),
      );

      const body = response.data;

      if ('IsSucceed' in body) {
        this.nestLogger.log(
          `${inquiryType} provider response | http=${response.status} | ${describeCentInsurResponse(body)}`,
        );
      }

      // Handle Sayah/Sheba API format (ReturnValue/HasError)
      if ('ReturnValue' in body || 'HasError' in body) {
        const providerError = getSayahProviderError(body);
        if (providerError) {
          throw this.formatProviderError(providerError.message, providerError.code);
        }
        return { raw: body };
      }

      // Handle CentInsur API format (IsSucceed/Result)
      if ('IsSucceed' in body) {
        const providerError = getCentInsurProviderError(body, inquiryType);
        if (providerError) {
          this.nestLogger.warn(
            `${inquiryType} provider business failure | ${describeCentInsurResponse(body)}`,
          );
          throw this.formatProviderError(providerError.message, providerError.code, undefined, {
            providerTrackingCode: providerError.providerTrackingCode,
          });
        }
        return { raw: body };
      }

      // Handle legacy format (success)
      if (!body.success) {
        throw this.formatProviderError(body.message, body.code);
      }

      return {
        raw: body,
      };
    } catch (error) {
      if (error instanceof AxiosError) {
        const data = error.response?.data as LegacyProviderApiResponse | undefined;
        
        // Check for Sayah/Sheba format error
        if (data && ('ReturnValue' in data || 'HasError' in data)) {
          const providerError = getSayahProviderError(data);
          if (providerError) {
            throw this.formatProviderError(providerError.message, providerError.code);
          }
        }
        
        // Check for CentInsur format error
        if (data && 'IsSucceed' in data) {
          const providerError = getCentInsurProviderError(data, inquiryType);
          if (providerError) {
            throw this.formatProviderError(providerError.message, providerError.code, undefined, {
              providerTrackingCode: providerError.providerTrackingCode,
            });
          }
        }
        
        throw this.formatProviderError(
          data?.message ?? error.message,
          data?.code ?? String(error.response?.status ?? 'NETWORK_ERROR'),
        );
      }
      throw error;
    }
  }

  /**
   * Transform payload to match provider-specific API format
   * Real Estate inquiry uses NationalId/PostalCode instead of nationalCode/postalCode
   */
  protected transformPayloadForInquiryType(
    inquiryType: InquiryType,
    payload: LegacyInquiryPayload,
  ): LegacyInquiryPayload {
    if (inquiryType === InquiryType.REAL_ESTATE) {
      return {
        NationalId: payload.nationalCode ?? payload.nationalId ?? payload.NationalId,
        PostalCode: payload.postalCode ?? payload.PostalCode,
      };
    }
    
    return payload;
  }

  protected getInquiryConfig(inquiryType: InquiryType): InquiryConfig {
    const inquiryConfig = this.providerConfig.inquiries[inquiryType];
    
    if (!inquiryConfig || !inquiryConfig.url) {
      throw this.formatProviderError(
        undefined,
        undefined,
        `Inquiry type ${inquiryType} is not configured for ${this.name}`,
      );
    }

    return inquiryConfig;
  }

  private async buildRequestConfig(
    inquiryType: InquiryType,
    inquiryConfig: InquiryConfig,
  ): Promise<{
    headers?: Record<string, string>;
  }> {
    // No authentication required
    if (inquiryConfig.authMethod === 'NONE') {
      return {};
    }

    // SOAP authentication is handled by subclasses (e.g., Shahkar)
    if (inquiryConfig.authMethod === 'SOAP') {
      return {};
    }

    // AMITIS token-based authentication
    if (inquiryConfig.authMethod === 'AMITIS') {
      if (!this.authTokenResolver) {
        throw this.formatProviderError(
          undefined,
          undefined,
          `No auth token resolver configured for ${this.name}`,
        );
      }

      if (!inquiryConfig.username || !inquiryConfig.password) {
        throw this.formatProviderError(
          undefined,
          undefined,
          `Credentials not configured for ${this.name}/${inquiryType}`,
        );
      }

      const token = await this.authTokenResolver(
        this.name,
        inquiryType,
        inquiryConfig.username,
        inquiryConfig.password,
      );
      
      return {
        headers: {
          Authorization: `Bearer ${token}`,
        },
      };
    }

    throw this.formatProviderError(
      undefined,
      undefined,
      `Unsupported auth method ${inquiryConfig.authMethod} for ${this.name}/${inquiryType}`,
    );
  }
}

// Made with Bob