import { Body, Controller, Delete, Get, Param, Post, Query, Req, Res } from '@nestjs/common';
import { Request, Response } from 'express';

import { CurriculumService } from './curriculum.service';

@Controller('curriculum')
export class CurriculumController {
  constructor(private readonly curriculumService: CurriculumService) {}

  @Get()
  getActiveCurriculum(@Req() request: Request, @Query('courseId') courseId?: string) {
    return this.curriculumService.getActiveCurriculum(
      this.getBearerToken(request),
      courseId,
    );
  }

  @Post('custom-modules')
  createCustomModule(
    @Req() request: Request,
    @Body() body: {
      courseId?: string;
      week?: number;
      name?: string;
      category?: string;
      dockerImage?: string;
      packageName?: string;
      launchFile?: string;
    },
  ) {
    return this.curriculumService.createCustomModule(this.getBearerToken(request), body);
  }

  @Delete('custom-modules/:moduleId')
  deleteCustomModule(
    @Req() request: Request,
    @Param('moduleId') moduleId: string,
    @Query('courseId') courseId?: string,
  ) {
    return this.curriculumService.deleteCustomModule(this.getBearerToken(request), moduleId, courseId);
  }

  @Get('courses')
  listCourses(@Req() request: Request) {
    return this.curriculumService.listCourses(this.getBearerToken(request));
  }

  @Get('references/:referenceId/download')
  async downloadReference(
    @Req() request: Request,
    @Param('referenceId') referenceId: string,
    @Res() response: Response,
  ) {
    const download = await this.curriculumService.getReferenceDownload(
      this.getBearerToken(request),
      referenceId,
    );
    if (download.url) return response.redirect(download.url);

    response.setHeader('content-type', download.contentType);
    return response.download(download.path, download.fileName);
  }

  private getBearerToken(request: Request): string | undefined {
    const [type, token] = request.headers.authorization?.split(' ') ?? [];
    return type === 'Bearer' ? token : undefined;
  }
}