import { Injectable } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';
import axios, { AxiosError } from 'axios';
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 { ProviderEnvConfig } from '../../config/configuration';
import { BaseProvider } from '../base/base-provider.abstract';
import { AmitisProvider } from './amitis.provider';
import {
  LegacyInquiryPayload,
  LegacyInquiryResult,
  PersonInquiryResult,
} from '../shared/legacy-api.provider.abstract';

interface ParsianCivilRegistrationPayload extends LegacyInquiryPayload {
  nationalCode?: string;
  birthDate?: string;
  NIN?: string;
  BirthDate?: string;
}

interface ParsianShahkarPayload extends LegacyInquiryPayload {
  nationalCode?: string;
  nationalCod?: string;
  NationalCod?: string;
  mobileNo?: string;
  MobileNo?: string;
  mobileNumber?: string;
  MobileNumber?: string;
}

interface ParsianShahkarResponse {
  errorNams?: string | null;
  ErrorNams?: string | null;
  comment?: string | null;
  id?: string | null;
  requestId?: string | null;
  response?: number;
  result?: string | null;
}

interface ParsianSayahPayload extends LegacyInquiryPayload {
  accountOwnerType?: string;
  nationalCode?: string;
  legalId?: string | null;
  sheba?: string;
}

interface ParsianSayahResponse {
  ReturnValue?: boolean;
  returnValue?: boolean;
  HasError?: boolean;
  hasError?: boolean;
  Errors?: Record<string, string> | Array<{ Code?: string; Message?: string }> | null;
  errors?: Record<string, string> | Array<{ Code?: string; Message?: string }> | null;
  IsSucceed?: boolean;
  isSucceed?: boolean;
  Result?: unknown;
  result?: unknown;
}

interface ParsianPolicyByChassisPayload extends LegacyInquiryPayload {
  chassisNo?: string;
}

interface ParsianPolicyByNationalCodePayload extends LegacyInquiryPayload {
  nationalCode?: string;
}

interface ParsianPolicyByPlatePayload extends LegacyInquiryPayload {
  plk1?: string;
  plk2?: string;
  plk3?: string;
  plksrl?: string;
}

@Injectable()
export class ParsianProvider extends BaseProvider<LegacyInquiryPayload, LegacyInquiryResult> {
  readonly name = ProviderName.PARSIAN;
  readonly supportedInquiryTypes = [
    InquiryType.PERSON,
    InquiryType.SHAHKAR,
    InquiryType.SHEBA,
    InquiryType.POLICY_BY_CHASSIS,
    InquiryType.POLICY_BY_PLATE,
    InquiryType.POLICY_BY_NATIONAL_CODE,
  ];

  constructor(
    configService: ConfigService,
    private readonly amitisProvider: AmitisProvider,
  ) {
    super(configService.get<ProviderEnvConfig>('parsian')!);
  }

  isEnabled(): boolean {
    const personConfig = this.config.inquiries[InquiryType.PERSON];
    const shahkarConfig = this.config.inquiries[InquiryType.SHAHKAR];
    const shebaConfig = this.config.inquiries[InquiryType.SHEBA];
    const policyByChassisConfig = this.config.inquiries[InquiryType.POLICY_BY_CHASSIS];
    const policyByPlateConfig = this.config.inquiries[InquiryType.POLICY_BY_PLATE];
    const policyByNationalCodeConfig =
      this.config.inquiries[InquiryType.POLICY_BY_NATIONAL_CODE];

    return (
      this.config.enabled &&
      (this.hasSoapCredentials(personConfig) ||
        (Boolean(shahkarConfig?.url) && Boolean(shahkarConfig?.apiKey)) ||
        (Boolean(shebaConfig?.url) &&
          Boolean(shebaConfig?.username) &&
          Boolean(shebaConfig?.password)) ||
        this.hasSoapCredentials(policyByChassisConfig) ||
        this.hasSoapCredentials(policyByPlateConfig) ||
        this.hasSoapCredentials(policyByNationalCodeConfig))
    );
  }

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

    if (inquiryType === InquiryType.SHAHKAR) {
      return this.inquireShahkar(payload as ParsianShahkarPayload);
    }

    if (inquiryType === InquiryType.SHEBA) {
      return this.inquireSayah(payload as ParsianSayahPayload);
    }

    if (inquiryType === InquiryType.POLICY_BY_CHASSIS) {
      return this.inquirePolicyByChassis(payload as ParsianPolicyByChassisPayload);
    }

    if (inquiryType === InquiryType.POLICY_BY_PLATE) {
      return this.inquirePolicyByPlate(payload as ParsianPolicyByPlatePayload);
    }

    if (inquiryType === InquiryType.POLICY_BY_NATIONAL_CODE) {
      return this.inquirePolicyByNationalCode(payload as ParsianPolicyByNationalCodePayload);
    }

    throw this.formatProviderError(
      undefined,
      'UNSUPPORTED_INQUIRY',
      `Parsian does not support ${inquiryType}`,
    );
  }

  private async inquireShahkar(payload: ParsianShahkarPayload): Promise<{ raw: unknown }> {
    const nationalCode = this.getRequiredString(
      payload.nationalCode ?? payload.nationalCod ?? payload.NationalCod,
      'nationalCode',
    );
    const mobileNumber = this.getRequiredString(
      payload.mobileNumber ?? payload.MobileNumber ?? payload.mobileNo ?? payload.MobileNo,
      'mobileNo',
    );
    const inquiryConfig = this.config.inquiries[InquiryType.SHAHKAR];

    if (!inquiryConfig?.url || !inquiryConfig.apiKey) {
      throw this.formatProviderError(
        undefined,
        undefined,
        'Parsian Shahkar inquiry is not configured',
      );
    }

    try {
      const response = await axios.get<ParsianShahkarResponse>(inquiryConfig.url, {
        params: {
          nationalCode,
          mobileNumber,
        },
        headers: {
          'X-PACKAGE-API-KEY': inquiryConfig.apiKey,
        },
        timeout: this.config.timeout,
      });

      const body = response.data;
      return {
        raw: {
          nationalCode,
          mobileNumber,
          ...body,
        },
      };
    } catch (error) {
      if (error instanceof AxiosError) {
        const data = error.response?.data as ParsianShahkarResponse | undefined;
        throw this.formatProviderError(
          data?.comment ?? data?.errorNams ?? data?.ErrorNams ?? error.message,
          String(data?.response ?? error.response?.status ?? 'NETWORK_ERROR'),
        );
      }
      throw error;
    }
  }

  private async inquireCivilRegistration(
    payload: ParsianCivilRegistrationPayload,
  ): Promise<PersonInquiryResult> {
    const nationalCode = this.getRequiredString(
      payload.nationalCode ?? payload.NIN,
      'nationalCode',
    );
    const birthDate = this.getRequiredString(payload.birthDate ?? payload.BirthDate, 'birthDate');
    const inquiryConfig = this.config.inquiries[InquiryType.PERSON];

    if (!this.hasSoapCredentials(inquiryConfig)) {
      throw this.formatProviderError(
        undefined,
        undefined,
        'Parsian person inquiry is not configured',
      );
    }

    try {
      const response = await axios.post<string>(
        inquiryConfig.url,
        this.buildCivilRegistrationEnvelope(
          nationalCode,
          birthDate,
          inquiryConfig.username,
          inquiryConfig.password,
        ),
        {
          headers: {
            'Content-Type': 'text/xml; charset=utf-8',
            SOAPAction: '"http://tempuri.org/ISabtInq/SubmitInqDteStsWithPstCod"',
          },
          timeout: this.config.timeout,
          responseType: 'text',
        },
      );

      return {
        nationalCode,
        birthDate,
        raw: {
          nationalCode,
          birthDate,
          result: this.extractSoapValue(response.data, 'SubmitInqDteStsWithPstCodResult'),
          soap: response.data,
        },
      };
    } catch (error) {
      if (error instanceof AxiosError) {
        throw this.formatProviderError(
          error.message,
          String(error.response?.status ?? 'NETWORK_ERROR'),
        );
      }
      throw error;
    }
  }

  private async inquirePolicyByChassis(
    payload: ParsianPolicyByChassisPayload,
  ): Promise<{ raw: unknown }> {
    const chassisNo = this.getRequiredString(payload.chassisNo, 'chassisNo');
    const response = await this.callCarPolicySoap(
      InquiryType.POLICY_BY_CHASSIS,
      'CIIWSPolicyChassis',
      { Chassisno: chassisNo },
    );

    return {
      raw: {
        chassisNo,
        ...response,
      },
    };
  }

  private async inquirePolicyByNationalCode(
    payload: ParsianPolicyByNationalCodePayload,
  ): Promise<{ raw: unknown }> {
    const nationalCode = this.getRequiredString(payload.nationalCode, 'nationalCode');
    const response = await this.callCarPolicySoap(
      InquiryType.POLICY_BY_NATIONAL_CODE,
      'CIIWSPolicyNationalId',
      { nationalId: nationalCode },
    );

    return {
      raw: {
        nationalCode,
        ...response,
      },
    };
  }

  private async inquirePolicyByPlate(
    payload: ParsianPolicyByPlatePayload,
  ): Promise<{ raw: unknown }> {
    const plk1 = this.getRequiredString(payload.plk1, 'plk1');
    const plk2 = this.getRequiredString(payload.plk2, 'plk2');
    const plk3 = this.getRequiredString(payload.plk3, 'plk3');
    const plksrl = this.getRequiredString(payload.plksrl, 'plksrl');
    const response = await this.callCarPolicySoap(
      InquiryType.POLICY_BY_PLATE,
      'CIIWSPolicyVehicleMeli',
      { Plk1: plk1, Plk2: plk2, Plk3: plk3, Plksrl: plksrl },
      'PassWord',
    );

    return {
      raw: {
        plk1,
        plk2,
        plk3,
        plksrl,
        ...response,
      },
    };
  }

  private async callCarPolicySoap(
    inquiryType: InquiryType,
    methodName: string,
    fields: Record<string, string>,
    passwordFieldName = 'Password',
  ): Promise<{ result: string | null; soap: string }> {
    const inquiryConfig = this.config.inquiries[inquiryType];

    if (!this.hasSoapCredentials(inquiryConfig)) {
      throw this.formatProviderError(
        undefined,
        undefined,
        `Parsian ${inquiryType} is not configured`,
      );
    }

    try {
      const response = await axios.post<string>(
        inquiryConfig.url,
        this.buildCarPolicyEnvelope(
          methodName,
          fields,
          inquiryConfig.username,
          inquiryConfig.password,
          passwordFieldName,
        ),
        {
          headers: {
            'Content-Type': 'text/xml; charset=utf-8',
            SOAPAction: `"http://tempuri.org/ICarAllPlcysV4/${methodName}"`,
          },
          timeout: this.config.timeout,
          responseType: 'text',
        },
      );

      return {
        result: this.extractSoapValue(response.data, `${methodName}Result`),
        soap: response.data,
      };
    } catch (error) {
      if (error instanceof AxiosError) {
        throw this.formatProviderError(
          error.message,
          String(error.response?.status ?? 'NETWORK_ERROR'),
        );
      }
      throw error;
    }
  }

  private async inquireSayah(payload: ParsianSayahPayload): Promise<{ raw: unknown }> {
    const accountOwnerType = payload.accountOwnerType ?? '1';
    const nationalId = payload.nationalCode ?? '';
    const legalId = payload.legalId ?? null;
    const shebaId = this.getRequiredString(payload.sheba, 'sheba');
    const inquiryConfig = this.config.inquiries[InquiryType.SHEBA];

    if (!inquiryConfig?.url || !inquiryConfig.username || !inquiryConfig.password) {
      throw this.formatProviderError(
        undefined,
        undefined,
        'Parsian Sayah inquiry is not configured',
      );
    }

    const token = await this.amitisProvider.getAccessToken(
      ProviderName.PARSIAN,
      InquiryType.SHEBA,
      inquiryConfig.username,
      inquiryConfig.password,
    );

    try {
      const response = await axios.post<ParsianSayahResponse>(
        inquiryConfig.url,
        {
          AccountOwnerType: accountOwnerType,
          NationalId: nationalId,
          LegalId: legalId,
          ShebaId: shebaId,
        },
        {
          headers: {
            Authorization: `Bearer ${token}`,
            'Content-Type': 'application/json',
          },
          timeout: this.config.timeout,
        },
      );

      if (
        (response.data.IsSucceed === false || response.data.isSucceed === false) &&
        this.hasErrors(response.data.Errors ?? response.data.errors)
      ) {
        throw this.formatProviderError(
          this.formatErrors(response.data.Errors ?? response.data.errors),
          'SAYAH_HAS_ERROR',
        );
      }

      return { raw: response.data };
    } catch (error) {
      if (error instanceof AxiosError) {
        const data = error.response?.data as ParsianSayahResponse | undefined;
        throw this.formatProviderError(
          this.formatErrors(data?.Errors ?? data?.errors) ?? error.message,
          String(error.response?.status ?? 'NETWORK_ERROR'),
        );
      }
      throw error;
    }
  }

  private getRequiredString(value: unknown, fieldName: string): string {
    if (typeof value !== 'string' || !value.trim()) {
      throw this.formatProviderError(undefined, undefined, `${fieldName} is required`);
    }
    return value.trim();
  }

  private hasSoapCredentials(
    inquiryConfig: ProviderEnvConfig['inquiries'][InquiryType],
  ): inquiryConfig is NonNullable<ProviderEnvConfig['inquiries'][InquiryType]> {
    return Boolean(inquiryConfig?.url && inquiryConfig.username && inquiryConfig.password);
  }

  private buildCarPolicyEnvelope(
    methodName: string,
    fields: Record<string, string>,
    username: string,
    password: string,
    passwordFieldName: 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>
      <${passwordFieldName}>${this.escapeXml(password)}</${passwordFieldName}>
    </${methodName}>
  </soap:Body>
</soap:Envelope>`;
  }

  private buildCivilRegistrationEnvelope(
    nationalCode: string,
    birthDate: string,
    username: string,
    password: string,
  ): string {
    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>
    <SubmitInqDteStsWithPstCod xmlns="http://tempuri.org/">
      <NIN>${this.escapeXml(nationalCode)}</NIN>
      <BirthDate>${this.escapeXml(birthDate)}</BirthDate>
      <Username>${this.escapeXml(username)}</Username>
      <Password>${this.escapeXml(password)}</Password>
    </SubmitInqDteStsWithPstCod>
  </soap:Body>
</soap:Envelope>`;
  }

  private extractSoapValue(xml: string, tagName: string): string | null {
    const match = xml.match(
      new RegExp(`<(?:\\w+:)?${tagName}[^>]*>([\\s\\S]*?)</(?:\\w+:)?${tagName}>`),
    );
    return match ? this.decodeXml(match[1].trim()) : null;
  }

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

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

  private hasErrors(
    errors?: Record<string, string> | Array<{ Code?: string; Message?: string }> | null,
  ): boolean {
    if (!errors) return false;
    return Array.isArray(errors) ? errors.length > 0 : Object.keys(errors).length > 0;
  }

  private formatErrors(
    errors?: Record<string, string> | Array<{ Code?: string; Message?: string }> | null,
  ): string | undefined {
    if (!this.hasErrors(errors)) return undefined;

    if (Array.isArray(errors)) {
      return errors.map((error) => `${error.Code}: ${error.Message}`).join(', ');
    }

    return Object.entries(errors ?? {})
      .map(([code, field]) => `${field} (code: ${code})`)
      .join(', ');
  }
}