/**
 * ONE (Ocean Network Express) Request/Response Mapper
 */

import { Injectable } from '@nestjs/common';
import { CarrierRateSearchInput } from '../../../domain/ports/out/carrier-connector.port';
import { RateQuote, RouteSegment, Surcharge } from '../../../domain/entities/rate-quote.entity';
import { v4 as uuidv4 } from 'uuid';

@Injectable()
export class ONERequestMapper {
  toONERequest(input: CarrierRateSearchInput): any {
    return {
      loading_port: input.origin,
      discharge_port: input.destination,
      equipment_type: this.mapContainerType(input.containerType),
      cargo_cutoff_date: input.departureDate,
      shipment_type: input.mode,
      dangerous_cargo: input.isHazmat || false,
      imo_class: input.imoClass,
      cargo_weight_kg: input.weight,
      cargo_volume_cbm: input.volume,
    };
  }

  fromONEResponse(oneResponse: any, originalInput: CarrierRateSearchInput): RateQuote[] {
    if (!oneResponse.instant_quotes || oneResponse.instant_quotes.length === 0) {
      return [];
    }

    return oneResponse.instant_quotes.map((quote: any) => {
      const surcharges: Surcharge[] = [];

      // Parse surcharges
      if (quote.additional_charges) {
        for (const [key, value] of Object.entries(quote.additional_charges)) {
          if (typeof value === 'number' && value > 0) {
            surcharges.push({
              type: key.toUpperCase(),
              description: this.formatChargeName(key),
              amount: value,
              currency: quote.currency || 'USD',
            });
          }
        }
      }

      const baseFreight = quote.ocean_freight || 0;
      const totalSurcharges = surcharges.reduce((sum, s) => sum + s.amount, 0);
      const totalAmount = baseFreight + totalSurcharges;

      // Build route segments
      const route: RouteSegment[] = [];

      // Origin port
      route.push({
        portCode: originalInput.origin,
        portName: quote.loading_port_name || originalInput.origin,
        departure: new Date(quote.departure_date),
        vesselName: quote.vessel_details?.name,
        voyageNumber: quote.vessel_details?.voyage,
      });

      // Transshipment ports
      if (quote.via_ports && Array.isArray(quote.via_ports)) {
        quote.via_ports.forEach((port: any) => {
          route.push({
            portCode: port.code || port,
            portName: port.name || port.code || port,
          });
        });
      }

      // Destination port
      route.push({
        portCode: originalInput.destination,
        portName: quote.discharge_port_name || originalInput.destination,
        arrival: new Date(quote.arrival_date),
      });

      const transitDays = quote.transit_days || this.calculateTransitDays(quote.departure_date, quote.arrival_date);

      return RateQuote.create({
        id: uuidv4(),
        carrierId: 'one',
        carrierName: 'ONE',
        carrierCode: 'ONEY',
        origin: {
          code: originalInput.origin,
          name: quote.loading_port_name || originalInput.origin,
          country: quote.loading_country || 'Unknown',
        },
        destination: {
          code: originalInput.destination,
          name: quote.discharge_port_name || originalInput.destination,
          country: quote.discharge_country || 'Unknown',
        },
        pricing: {
          baseFreight,
          surcharges,
          totalAmount,
          currency: quote.currency || 'USD',
        },
        containerType: originalInput.containerType,
        mode: originalInput.mode,
        etd: new Date(quote.departure_date),
        eta: new Date(quote.arrival_date),
        transitDays,
        route,
        availability: quote.capacity_status?.available || 0,
        frequency: quote.service_info?.frequency || 'Weekly',
        vesselType: 'Container Ship',
        co2EmissionsKg: quote.environmental_info?.co2_emissions,
      });
    });
  }

  private mapContainerType(type: string): string {
    const mapping: Record<string, string> = {
      '20GP': '20DV',
      '40GP': '40DV',
      '40HC': '40HC',
      '45HC': '45HC',
      '20RF': '20RF',
      '40RF': '40RH',
    };
    return mapping[type] || type;
  }

  private formatChargeName(key: string): string {
    return key
      .split('_')
      .map((word) => word.charAt(0).toUpperCase() + word.slice(1))
      .join(' ');
  }

  private calculateTransitDays(departure?: string, arrival?: string): number {
    if (!departure || !arrival) return 0;
    const depDate = new Date(departure);
    const arrDate = new Date(arrival);
    const diff = arrDate.getTime() - depDate.getTime();
    return Math.ceil(diff / (1000 * 60 * 60 * 24));
  }
}