import { CommandHandler } from '@nestjs/cqrs';
import { CreateAdCommand } from '../../commands/create-ad.command';
import { Ad } from '../entities/ad';
import { AdRepository } from '../../adapters/secondaries/ad.repository';
import { InjectMapper } from '@automapper/nestjs';
import { Mapper } from '@automapper/core';
import { CreateAdRequest } from '../dtos/create-ad.request';
import { Inject } from '@nestjs/common';
import { IProvideParams } from '../interfaces/params-provider.interface';
import { ICreateGeorouter } from '../../../geography/domain/interfaces/georouter-creator.interface';
import { IFindTimezone } from '../../../geography/domain/interfaces/timezone-finder.interface';
import { IGeorouter } from '../../../geography/domain/interfaces/georouter.interface';
import { DefaultParams } from '../types/default-params.type';
import { Role } from '../types/role.enum';
import { Geography } from '../entities/geography';
import { IEncodeDirection } from '../../../geography/domain/interfaces/direction-encoder.interface';
import { TimeConverter } from '../entities/time-converter';
import { Coordinate } from '../../../geography/domain/entities/coordinate';
import {
  DIRECTION_ENCODER,
  GEOROUTER_CREATOR,
  PARAMS_PROVIDER,
  TIMEZONE_FINDER,
} from '../../ad.constants';

@CommandHandler(CreateAdCommand)
export class CreateAdUseCase {
  private readonly georouter: IGeorouter;
  private readonly defaultParams: DefaultParams;
  private timezone: string;
  private roles: Role[];
  private geography: Geography;
  private ad: Ad;

  constructor(
    @InjectMapper() private readonly mapper: Mapper,
    private readonly adRepository: AdRepository,
    @Inject(PARAMS_PROVIDER)
    private readonly defaultParamsProvider: IProvideParams,
    @Inject(GEOROUTER_CREATOR)
    private readonly georouterCreator: ICreateGeorouter,
    @Inject(TIMEZONE_FINDER)
    private readonly timezoneFinder: IFindTimezone,
    @Inject(DIRECTION_ENCODER)
    private readonly directionEncoder: IEncodeDirection,
  ) {
    this.defaultParams = defaultParamsProvider.getParams();
    this.georouter = georouterCreator.create(
      this.defaultParams.GEOROUTER_TYPE,
      this.defaultParams.GEOROUTER_URL,
    );
  }

  async execute(command: CreateAdCommand): Promise<Ad> {
    try {
      this.ad = this.mapper.map(command.createAdRequest, CreateAdRequest, Ad);
      this.setTimezone(command.createAdRequest.addresses);
      this.setGeography(command.createAdRequest.addresses);
      this.setRoles(command.createAdRequest);
      await this.geography.createRoutes(this.roles, this.georouter, {
        withDistance: false,
        withPoints: true,
        withTime: false,
      });
      this.setAdGeography(command);
      this.setAdSchedule(command);
      return await this.adRepository.createAd(this.ad);
    } catch (error) {
      throw error;
    }
  }

  private setTimezone = (coordinates: Coordinate[]): void => {
    this.timezone = this.defaultParams.DEFAULT_TIMEZONE;
    try {
      const timezones = this.timezoneFinder.timezones(
        coordinates[0].lon,
        coordinates[0].lat,
      );
      if (timezones.length > 0) this.timezone = timezones[0];
    } catch (e) {}
  };

  private setRoles = (createAdRequest: CreateAdRequest): void => {
    this.roles = [];
    if (createAdRequest.driver) this.roles.push(Role.DRIVER);
    if (createAdRequest.passenger) this.roles.push(Role.PASSENGER);
  };

  private setGeography = (coordinates: Coordinate[]): void => {
    this.geography = new Geography(coordinates);
  };

  private setAdGeography = (command: CreateAdCommand): void => {
    this.ad.driverDistance = this.geography.driverRoute?.distance;
    this.ad.driverDuration = this.geography.driverRoute?.duration;
    this.ad.passengerDistance = this.geography.passengerRoute?.distance;
    this.ad.passengerDuration = this.geography.passengerRoute?.duration;
    this.ad.fwdAzimuth = this.geography.driverRoute
      ? this.geography.driverRoute.fwdAzimuth
      : this.geography.passengerRoute.fwdAzimuth;
    this.ad.backAzimuth = this.geography.driverRoute
      ? this.geography.driverRoute.backAzimuth
      : this.geography.passengerRoute.backAzimuth;
    this.ad.waypoints = this.directionEncoder.encode(
      command.createAdRequest.addresses,
    );
    this.ad.direction = this.geography.driverRoute
      ? this.directionEncoder.encode(this.geography.driverRoute.points)
      : undefined;
  };

  private setAdSchedule = (command: CreateAdCommand): void => {
    this.ad.monTime = TimeConverter.toUtcDatetime(
      this.ad.fromDate,
      command.createAdRequest.monTime,
      this.timezone,
    );
    this.ad.tueTime = TimeConverter.toUtcDatetime(
      this.ad.fromDate,
      command.createAdRequest.tueTime,
      this.timezone,
    );
    this.ad.wedTime = TimeConverter.toUtcDatetime(
      this.ad.fromDate,
      command.createAdRequest.wedTime,
      this.timezone,
    );
    this.ad.thuTime = TimeConverter.toUtcDatetime(
      this.ad.fromDate,
      command.createAdRequest.thuTime,
      this.timezone,
    );
    this.ad.friTime = TimeConverter.toUtcDatetime(
      this.ad.fromDate,
      command.createAdRequest.friTime,
      this.timezone,
    );
    this.ad.satTime = TimeConverter.toUtcDatetime(
      this.ad.fromDate,
      command.createAdRequest.satTime,
      this.timezone,
    );
    this.ad.sunTime = TimeConverter.toUtcDatetime(
      this.ad.fromDate,
      command.createAdRequest.sunTime,
      this.timezone,
    );
  };
}