import { OnModuleInit, Inject, Injectable } from '@nestjs/common';
import { ClientGrpc } from '@nestjs/microservices';
import { DadosferaLogger } from '@dadosfera/dadosfera-logs';

import { ProtoServices } from '@dadosfera/protospack-v2/dist/lib/Duc';
import {
  CustomersProtoService,
  UsersProtoService,
} from '@dadosfera/protospack-v2/dist/lib/Duc/interfaces/write-service';
import {
  AssignRoleToUserRequest,
  IdRequest,
  UnassignRoleFromUserRequest,
  UserCreateRequest,
} from '@dadosfera/protospack-v2/dist/lib/Duc/interfaces/messages';
import { lastValueFrom } from 'rxjs';
import {
  BatchCreateUserReq,
  CreateUserReq,
  Hierarchy,
  IUserByCustomer,
  SetUserRolesReq,
  UpdateUserReq,
  UserReporter,
} from './dtos/entities';
import { RolesService } from '../roles/roles.service';
import { HIERARCHIES } from './hierarchies';
import { LanguageEnum } from 'src/utils/languages.enum';
import { UserByCustomer } from '@dadosfera/protospack-v2/dist/lib/Duc/interfaces/entities';
import { EnrichErrorCode } from 'src/utils/ErrorBuilder';
import { DucClient } from '../duc/client.config';
import { Metadata } from '@grpc/grpc-js';
import { ParserBuilder } from 'src/utils/FileParser/parser.builder';

@Injectable()
export class UsersService implements OnModuleInit {
  logger: DadosferaLogger;
  language: LanguageEnum = LanguageEnum.ptbr;

  private usersClientService: UsersProtoService;
  private customersClientService: CustomersProtoService;
  constructor(
    @Inject(DadosferaLogger)
    dadosferaLogger: DadosferaLogger,
    @Inject(DucClient.name) private readonly grpcClient: ClientGrpc,
    private rolesService: RolesService,
  ) {
    this.logger = dadosferaLogger.logger;
  }

  onModuleInit() {
    this.usersClientService = this.grpcClient.getService(
      ProtoServices.UsersProtoService,
    );
    this.customersClientService = this.grpcClient.getService(
      ProtoServices.CustomersProtoService,
    );
  }

  setLanguage(l: LanguageEnum = LanguageEnum.ptbr) {
    if (Object.values(LanguageEnum).includes(l)) this.language = l;
    this.rolesService.setLanguage(l);
  }

  async findAllUsersByCustomerId(customerId: string) {
    const { users } = await lastValueFrom(
      this.usersClientService.UserFindAllByCustomerId({ customerId }),
    );
    const usersAdj = this.adjustUsersPayload(users);
    const dintinctDepartments = [...new Set(usersAdj.map((u) => u.department))]
      .filter((value) => value != null)
      .sort();
    const dintinctJobTitles = [...new Set(usersAdj.map((u) => u.jobTitle))]
      .filter((value) => value != null)
      .sort();
    return {
      users: usersAdj,
      jobTitles: dintinctJobTitles,
      departments: dintinctDepartments,
    };
  }

  async downloadUsersInCsv(customerId: string) {
    const { users } = await lastValueFrom(
      this.usersClientService.UserFindAllByCustomerId({ customerId }),
    );

    const formatUsers: UserReporter[] = users.map(user => ({
      createdAt: user.createdAt,
      email: user.email,
      lastLogin: user.lastLogin,
      mfaStatus: user.mfaStatus,
      name: user.name,
      status: user.status,
      updatedAt: user.updatedAt
    }))

    const parser = ParserBuilder.build<UserReporter>('csv');

    const file = await parser.parse(formatUsers);

    const timestamp = new Date().toISOString().replace(/[:.]/g, '-');
    const filename = `dadosfera_users_${timestamp}.csv`;

    return {
      file,
      filename
    }
  }

  async findOneById(id: string): Promise<{ user: IUserByCustomer }> {
    const { user } = await lastValueFrom(
      this.usersClientService.UserFindOneById({ id }),
    );
    const res: { user: IUserByCustomer } = {
      user: this.adjustUsersPayload([user])[0],
    };
    const { permissions } = await lastValueFrom(
      this.usersClientService.GetUserPermissions({ id }),
    ).catch((error) => {
      this.logger.error('UsersService.findOneById - GetUserPermissions', {
        error,
      });
      const permissions: string[] = [];
      return { permissions };
    });
    res.user.permissions = permissions;
    res.user.authProvider = process.env.AUTH_PROVIDER || 'cognito';
    return res;
  }

  async createUser(req: CreateUserReq, meta?: Metadata) {
    const { email, department, hierarchy, jobTitle, name, roleNames } = req;
    const { user } = await lastValueFrom(
      this.usersClientService.UserCreate(
        {
          email,
          hierarchy,
          name,
          roleIds: [],
          department,
          jobTitle,
          roleNames,
        },
        meta,
      ),
    );
    return { user: this.adjustUsersPayload([user])[0] };
  }

  async updateUser(req: UpdateUserReq, id: string, customerId: string) {
    const { roleNames, ...updateUserDTO } = req;
    if (roleNames && roleNames.length > 0) {
      await this.setRoles({ roleNames, userId: id }, customerId);
    }

    const { user } = await lastValueFrom(
      this.usersClientService.UserUpdate({
        department: updateUserDTO.department,
        email: updateUserDTO.email,
        hierarchy: updateUserDTO.hierarchy,
        jobTitle: updateUserDTO.jobTitle,
        name: updateUserDTO.name,
        bio: updateUserDTO.bio,
        companyName: updateUserDTO.companyName,
        personalSite: updateUserDTO.personalSite,
        customerId,
        id,
        metabaseUserId: undefined,
      }),
    );
    return { user: this.adjustUsersPayload([user])[0] };
  }

  async setRoles(body: SetUserRolesReq, customerId: string) {
    const { roleNames, userId } = body;
    const clearRoles = roleNames && roleNames.length === 0;
    const { user } = await lastValueFrom(
      this.usersClientService.UserSetRoles({
        userId,
        roleIds: [],
        roleNames,
        clearRoles,
        customerId,
      }),
    );

    return { user: this.adjustUsersPayload([user])[0] };
  }

  async batchCreateUser(req: BatchCreateUserReq, meta?: Metadata) {
    const { users } = req;
    const usersToCreate: UserCreateRequest[] = users.map(
      ({ roleNames, email, department, hierarchy, jobTitle, name }) => ({
        roleNames,
        email,
        department,
        hierarchy,
        jobTitle,
        name,
        roleIds: [],
      }),
    );
    const { errorUsers, usersCreated } = await lastValueFrom(
      this.usersClientService.UserBatchCreate(
        {
          users: usersToCreate,
        },
        meta,
      ),
    );

    return {
      usersCreated: this.adjustUsersPayload(usersCreated),
      errorUsers: errorUsers.map(({ user, error }) => ({
        user,
        error: EnrichErrorCode(error).message,
      })),
    };
  }

  async resendInvite(body: IdRequest, metadata: Metadata) {
    return lastValueFrom(
      this.usersClientService.UserResendInvite(body, metadata),
    );
  }

  async assignRoleToUser(body: AssignRoleToUserRequest) {
    return lastValueFrom(this.usersClientService.AssignRoleToUser(body));
  }

  async unassignRoleFromUser(body: UnassignRoleFromUserRequest) {
    return lastValueFrom(this.usersClientService.UnassignRoleFromUser(body));
  }

  async deleteUser(id: IdRequest) {
    return lastValueFrom(this.usersClientService.UserRemove(id));
  }

  getAllHierarchies(): { hierarchies: Hierarchy[] } {
    const hierarchies = Object.keys(HIERARCHIES).map((key) => ({
      id: key,
      name: HIERARCHIES[key]?.name[this.language] || key,
    }));
    return { hierarchies };
  }

  async getAllDepartments(customerId?: string) {
    return lastValueFrom(
      this.usersClientService.FindDistinctDepartments({ customerId }),
    );
  }

  async getAllJobTitles(customerId?: string) {
    return lastValueFrom(
      this.usersClientService.FindDistinctJobTitles({ customerId }),
    );
  }

  private adjustUsersPayload(users: UserByCustomer[]) {
    return users.map((u) => {
      if (!u) return undefined;
      return {
        ...u,
        roles: this.rolesService.getRolesPermissionsName(u.roles),
        hierarchy: HIERARCHIES[u.hierarchy]?.name[this.language] || u.hierarchy,
      };
    });
  }

  async findAllCustomers() {
    return await lastValueFrom(this.customersClientService.CustomerFindAll({}));
  }

  async synchronizeUser(userId: string) {
    return await lastValueFrom(
      this.usersClientService.INTERNAL_UserSynchronize({ userId }),
    );
  }
}