import { Body, Controller, Get, Param, Patch, Post, Query, UseGuards } from '@nestjs/common';
import { CommandBus, QueryBus } from '@nestjs/cqrs';
import { ApiBearerAuth, ApiOperation, ApiResponse, ApiTags } from '@nestjs/swagger';
import { UserRole } from '@prisma/client';
import { JwtAuthGuard, Roles, RolesGuard } from '@modules/auth';
import { NotFoundException } from '@modules/shared';
import { CreateProjectCommand } from '../../application/commands/create-project/create-project.command';
import { UpdateProjectCommand } from '../../application/commands/update-project/update-project.command';
import { GetProjectQuery } from '../../application/queries/get-project/get-project.query';
import { ListProjectsQuery } from '../../application/queries/list-projects/list-projects.query';
import { CreateProjectDto } from '../dto/create-project.dto';
import { SearchProjectsDto } from '../dto/search-projects.dto';
import { UpdateProjectDto } from '../dto/update-project.dto';

interface RawProjectListItem {
  id: string;
  name: string;
  slug: string;
  developer: string;
  developerLogo: string | null;
  media?: { url: string; type?: string; order?: number }[] | null;
  [k: string]: unknown;
}

function shapeProject<T extends RawProjectListItem>(row: T) {
  const { developer, developerLogo, media, ...rest } = row;
  const thumbnailUrl =
    Array.isArray(media) && media.length > 0 ? (media[0]?.url ?? null) : null;
  return {
    ...rest,
    developer: { id: developer, name: developer, logo: developerLogo ?? null },
    thumbnailUrl,
    propertyTypes: [],
    completionDate: (rest as { completionDate?: Date | null }).completionDate ?? null,
  };
}

@ApiTags('projects')
@Controller('projects')
export class ProjectsController {
  constructor(
    private readonly commandBus: CommandBus,
    private readonly queryBus: QueryBus,
  ) {}

  // ── Public endpoints ──────────────────────────────────────────────

  @ApiOperation({ summary: 'Danh sách dự án', description: 'Tìm kiếm và lọc dự án bất động sản' })
  @ApiResponse({ status: 200, description: 'Danh sách dự án phân trang' })
  @Get()
  async listProjects(@Query() dto: SearchProjectsDto) {
    const result = await this.queryBus.execute<
      ListProjectsQuery,
      { data: RawProjectListItem[]; total: number; page: number; limit: number; totalPages: number }
    >(
      new ListProjectsQuery(
        dto.q,
        dto.status,
        dto.city,
        dto.district,
        dto.developer,
        dto.isVerified,
        dto.page ?? 1,
        dto.limit ?? 20,
      ),
    );
    return { ...result, data: result.data.map(shapeProject) };
  }

  @ApiOperation({ summary: 'Chi tiết dự án', description: 'Xem chi tiết dự án theo slug hoặc ID' })
  @ApiResponse({ status: 200, description: 'Thông tin chi tiết dự án' })
  @ApiResponse({ status: 404, description: 'Không tìm thấy dự án' })
  @Get(':slugOrId')
  async getProject(@Param('slugOrId') slugOrId: string) {
    const result = await this.queryBus.execute<GetProjectQuery, RawProjectListItem | null>(
      new GetProjectQuery(slugOrId),
    );
    if (!result) {
      throw new NotFoundException('Dự án', slugOrId);
    }
    return shapeProject(result);
  }

  // ── Admin endpoints ───────────────────────────────────────────────

  @ApiOperation({ summary: 'Tạo dự án (admin)', description: 'Tạo mới dự án bất động sản' })
  @ApiResponse({ status: 201, description: 'Dự án đã tạo' })
  @ApiBearerAuth('JWT')
  @UseGuards(JwtAuthGuard, RolesGuard)
  @Roles(UserRole.ADMIN)
  @Post()
  async createProject(@Body() dto: CreateProjectDto) {
    return this.commandBus.execute(
      new CreateProjectCommand(
        dto.name,
        dto.slug,
        dto.developer,
        dto.developerLogo ?? null,
        dto.totalUnits,
        dto.status,
        dto.latitude,
        dto.longitude,
        dto.address,
        dto.ward,
        dto.district,
        dto.city,
        dto.description ?? null,
        dto.amenities ?? null,
        dto.masterPlanUrl ?? null,
        dto.minPrice ? BigInt(dto.minPrice) : null,
        dto.maxPrice ? BigInt(dto.maxPrice) : null,
        dto.pricePerM2Range ?? null,
        dto.totalArea ?? null,
        dto.buildingCount ?? null,
        dto.floorCount ?? null,
        dto.unitTypes ?? null,
        dto.tags ?? [],
        dto.startDate ? new Date(dto.startDate) : null,
        dto.completionDate ? new Date(dto.completionDate) : null,
      ),
    );
  }

  @ApiOperation({ summary: 'Cập nhật dự án (admin)', description: 'Cập nhật thông tin dự án' })
  @ApiResponse({ status: 200, description: 'Dự án đã cập nhật' })
  @ApiBearerAuth('JWT')
  @UseGuards(JwtAuthGuard, RolesGuard)
  @Roles(UserRole.ADMIN)
  @Patch(':id')
  async updateProject(@Param('id') id: string, @Body() dto: UpdateProjectDto) {
    return this.commandBus.execute(
      new UpdateProjectCommand(
        id,
        dto.name,
        dto.developer,
        dto.developerLogo,
        dto.totalUnits,
        dto.completedUnits,
        dto.status,
        dto.description,
        dto.amenities,
        dto.masterPlanUrl,
        dto.minPrice !== undefined ? (dto.minPrice ? BigInt(dto.minPrice) : null) : undefined,
        dto.maxPrice !== undefined ? (dto.maxPrice ? BigInt(dto.maxPrice) : null) : undefined,
        dto.pricePerM2Range,
        dto.totalArea,
        dto.buildingCount,
        dto.floorCount,
        dto.unitTypes,
        dto.media,
        dto.documents,
        dto.tags,
        dto.isVerified,
        dto.startDate !== undefined ? (dto.startDate ? new Date(dto.startDate) : null) : undefined,
        dto.completionDate !== undefined ? (dto.completionDate ? new Date(dto.completionDate) : null) : undefined,
      ),
    );
  }
}