import { Injectable, NotFoundException } from '@nestjs/common';
import omit from 'lodash.omit';
import pick from 'lodash.pick';
import { BuildingService } from 'src/objects/building/building.service';
import { GroupService } from 'src/objects/group/group.service';
import { User } from 'src/objects/user/user.entity';
import { UserService } from 'src/objects/user/user.service';
import { BuildingFloorUpdateRequestDto } from './dto/buildings-floor-request.dto';
import { CreateBuildingRequestDto } from './dto/buildings-create-request.dto';
import { BuildingsUpdateRequestDto } from './dto/buildings-update-request.dto';
import {
  BuildingsCreateRoomRequestDto,
  BuildingsUpdateRoomRequestDto,
} from './dto/buildings-create-room-request.dto';
import { PlanRendererService } from './plan-renderer/plan-renderer.service';

@Injectable()
export class AppBuildingService {
  constructor(
    private readonly buildingService: BuildingService,
    private readonly userService: UserService,
    private readonly groupService: GroupService,
    private readonly planRenderService: PlanRendererService,
  ) {}

  async getUserBuildings(user: User) {
    return this.buildingService.getBuildingsByUserSub(user.sub);
  }

  async createBuilding(user: User, body: CreateBuildingRequestDto) {
    const getGroup = await this.groupService.getByIdAndMemberSub(
      body.group,
      user.sub,
    );
    if (!getGroup) {
      throw new NotFoundException('Group not found');
    }

    // TODO: validate color

    const newBuilding = await this.buildingService.saveBuilding({
      ...pick(body, ['displayName', 'color', 'address']),
      groups: [getGroup],
    });

    const newFloor = await this.buildingService.saveFloor({
      displayName: 'Ground Floor',
      number: 0,
      plan: '{}',
      building: newBuilding,
    });

    delete newFloor.building;
    newBuilding.floors = [newFloor];

    return omit(newBuilding, ['groups']);
  }

  async updateBuilding(
    user: User,
    id: number,
    body: BuildingsUpdateRequestDto,
  ) {
    const building = await this.buildingService.getBuildingByIdAndUserSub(
      id,
      user.sub,
    );

    if (!building) {
      throw new NotFoundException('Building not found');
    }

    Object.assign(building, body);

    await this.buildingService.saveBuilding(building);

    return building;
  }

  async getBuildingById(user: User, id: number) {
    const building = await this.buildingService.getBuildingByIdAndUserSub(
      id,
      user.sub,
      ['floors', 'floors.rooms'],
    );

    if (!building) {
      throw new NotFoundException('Building not found');
    }

    return omit(building, ['groups']);
  }

  async getBuildingFloors(user: User, buildingId: number) {
    const floors = await this.buildingService.getFloorsByBuildingAndUserSub(
      buildingId,
      user.sub,
      ['rooms'],
    );

    return floors.map((floor) => omit(floor, ['building']));
  }

  async getBuildingFloor(user: User, buildingId: number, floorNumber: number) {
    const floor = await this.buildingService.getFloorByBuildingAndUserSub(
      buildingId,
      floorNumber,
      user.sub,
      ['rooms'],
    );

    if (!floor) {
      throw new NotFoundException('Floor not found');
    }

    return omit(floor, ['building']);
  }

  async updateBuildingFloor(
    user: User,
    body: BuildingFloorUpdateRequestDto,
    buildingId: number,
    floorNumber: number,
  ) {
    const floor = await this.buildingService.getFloorByBuildingAndUserSub(
      buildingId,
      floorNumber,
      user.sub,
      ['rooms'],
    );

    if (!floor) {
      throw new NotFoundException('Floor not found');
    }

    Object.assign(floor, body);

    this.planRenderService.renderFloor(floor);
    await this.buildingService.saveFloor(floor);
    return omit(floor, ['building']);
  }

  async addNewRoom(
    user: User,
    body: BuildingsCreateRoomRequestDto,
    buildingId: number,
    floorNumber: number,
  ) {
    const floor = await this.buildingService.getFloorByBuildingAndUserSub(
      buildingId,
      floorNumber,
      user.sub,
      ['building', 'rooms'],
    );

    if (!floor) {
      throw new NotFoundException('Floor not found');
    }

    const newRoom = await this.buildingService.saveRoom({
      ...body,
      floor,
      building: floor.building,
    });

    floor.rooms = [...floor.rooms, newRoom];

    return omit(newRoom, ['building', 'floor']);
  }

  async getRoomsOnFloor(user: User, buildingId: number, floorNumber: number) {
    return this.buildingService.getRoomsOnFloorByBuildingAndUserSub(
      buildingId,
      floorNumber,
      user.sub,
    );
  }

  async getRoomsInBuilding(user: User, buildingId: number) {
    const rooms = await this.buildingService.getRoomsByBuildingAndUserSub(
      buildingId,
      user.sub,
      ['floor'],
    );

    return rooms.map((room) => ({
      ...room,
      floor: pick(room.floor, ['id', 'displayName', 'number']),
    }));
  }

  async getRoom(user: User, buildingId: number, roomId: number) {
    const room = await this.buildingService.getRoomByBuildingAndUserSub(
      buildingId,
      roomId,
      user.sub,
    );
    if (!room) {
      throw new NotFoundException('Room not found');
    }
    return room;
  }

  async updateRoom(
    user: User,
    body: BuildingsUpdateRoomRequestDto,
    buildingId: number,
    roomId: number,
  ) {
    const room = await this.buildingService.getRoomByBuildingAndUserSub(
      buildingId,
      roomId,
      user.sub,
    );

    if (!room) {
      throw new NotFoundException('Room not found');
    }

    Object.assign(room, body);

    await this.buildingService.saveRoom(room);

    return room;
  }

  async deleteRoom(user: User, buildingId: number, roomId: number) {
    const room = await this.buildingService.getRoomByBuildingAndUserSub(
      buildingId,
      roomId,
      user.sub,
    );

    if (!room) {
      throw new NotFoundException('Room not found');
    }

    await this.buildingService.deleteRoom(room);

    return room;
  }
}