import { Injectable } from '@nestjs/common';
import axios, { AxiosError } from 'axios';
import { mergeOutboundAxiosConfig } from '../../common/helpers/http-client.helper';
import {
  getCarPolicyProviderError,
  parseFirstCarPolicy,
} from '../../common/helpers/soap-car-policy.helper';
import { InquiryType } from '../../common/enums/inquiry-type.enum';
import { ProviderEnvConfig, InquiryConfig } from '../../config/configuration';

export interface CarPlateSoapFields {
  plk1: string;
  plk2: string;
  plk3: string;
  plksrl: string;
}

@Injectable()
export class CentInsurCarPolicyClient {
  async inquireByChassis(
    config: ProviderEnvConfig,
    inquiryType: InquiryType,
    chassisNo: string,
  ): Promise<Record<string, string>> {
    return this.callSoap(
      config,
      inquiryType,
      InquiryType.POLICY_BY_CHASSIS,
      'CIIWSPolicyChassis',
      { ChassisNo: chassisNo },
    );
  }

  async inquireByPlate(
    config: ProviderEnvConfig,
    inquiryType: InquiryType,
    plate: CarPlateSoapFields,
  ): Promise<Record<string, string>> {
    return this.callSoap(
      config,
      inquiryType,
      InquiryType.POLICY_BY_PLATE,
      'CIIWSPolicyVehicleMeli',
      {
        Plk1: plate.plk1,
        Plk2: plate.plk2,
        Plk3: plate.plk3,
        PlkSrl: plate.plksrl,
      },
    );
  }

  async inquireByNationalCode(
    config: ProviderEnvConfig,
    inquiryType: InquiryType,
    nationalCode: string,
  ): Promise<Record<string, string>> {
    return this.callSoap(
      config,
      inquiryType,
      InquiryType.POLICY_BY_NATIONAL_CODE,
      'CIIWSPolicyNationalId',
      { NationalId: nationalCode },
    );
  }

  private async callSoap(
    config: ProviderEnvConfig,
    inquiryType: InquiryType,
    fallbackInquiryType: InquiryType,
    methodName: string,
    fields: Record<string, string>,
  ): Promise<Record<string, string>> {
    const inquiryConfig = this.resolveInquiryConfig(config, inquiryType, fallbackInquiryType);

    if (!this.hasSoapCredentials(inquiryConfig)) {
      throw new Error(`${inquiryType} is not configured for CentInsur car policy SOAP`);
    }

    try {
      const response = await axios.post<string>(
        inquiryConfig.url,
        this.buildCarPolicyEnvelope(
          methodName,
          fields,
          inquiryConfig.username,
          inquiryConfig.password,
        ),
        mergeOutboundAxiosConfig({
          headers: {
            'Content-Type': 'text/xml; charset=utf-8',
            SOAPAction: `"http://tempuri.org/ICarAllPlcys/${methodName}"`,
          },
          timeout: config.timeout,
          responseType: 'text',
        }),
      );

      const policy = parseFirstCarPolicy(response.data);
      const providerError = getCarPolicyProviderError(response.data, policy);
      if (providerError) {
        const error = new Error(providerError.message);
        (error as Error & { normalizedError: { code: string; message: string } }).normalizedError = {
          code: providerError.code,
          message: providerError.message,
        };
        throw error;
      }

      return policy;
    } catch (error) {
      if (error instanceof AxiosError) {
        const wrapped = new Error(error.message);
        (wrapped as Error & { normalizedError: { code: string; message: string } }).normalizedError =
          {
            code: String(error.response?.status ?? 'NETWORK_ERROR'),
            message: error.message,
          };
        throw wrapped;
      }
      throw error;
    }
  }

  resolveInquiryConfig(
    config: ProviderEnvConfig,
    inquiryType: InquiryType,
    fallbackInquiryType: InquiryType,
  ): InquiryConfig {
    const candidates = [
      inquiryType,
      fallbackInquiryType,
      InquiryType.POLICY_BY_PLATE,
      InquiryType.POLICY_BY_NATIONAL_CODE,
      InquiryType.POLICY_BY_CHASSIS,
      InquiryType.CAR_BY_PLATE,
      InquiryType.THIRD_PARTY_CAR,
    ];

    for (const candidate of candidates) {
      const inquiryConfig = config.inquiries[candidate];
      if (inquiryConfig?.url) {
        return inquiryConfig;
      }
    }

    return {
      url: '',
      username: '',
      password: '',
      apiKey: '',
      authMethod: 'SOAP',
    };
  }

  hasSoapCredentials(inquiryConfig: InquiryConfig | undefined): boolean {
    return Boolean(inquiryConfig?.url && inquiryConfig.username && inquiryConfig.password);
  }

  private buildCarPolicyEnvelope(
    methodName: string,
    fields: Record<string, string>,
    username: string,
    password: string,
  ): string {
    const fieldXml = Object.entries(fields)
      .map(([name, value]) => `      <${name}>${this.escapeXml(value)}</${name}>`)
      .join('\n');

    return `<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
               xmlns:xsd="http://www.w3.org/2001/XMLSchema"
               xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
    <${methodName} xmlns="http://tempuri.org/">
${fieldXml}
      <Username>${this.escapeXml(username)}</Username>
      <PassWrod>${this.escapeXml(password)}</PassWrod>
    </${methodName}>
  </soap:Body>
</soap:Envelope>`;
  }

  private escapeXml(value: string): string {
    return value
      .replace(/&/g, '&amp;')
      .replace(/</g, '&lt;')
      .replace(/>/g, '&gt;')
      .replace(/"/g, '&quot;')
      .replace(/'/g, '&apos;');
  }
}