import { Body, Controller, Delete, Get, Patch, Post, Put, Req } from '@nestjs/common';
import type { Request } from 'express';

import { AdminAuthService } from './admin-auth.service';
import { Public } from './decorators/admin-auth.decorators';
import { AdminLoginDto, ChangeAdminPasswordDto } from './dto';

@Controller('auth/admin')
export class AdminAuthController {
  constructor(private readonly adminAuthService: AdminAuthService) {}

  @Get('me')
  me(@Req() request: { admin?: { id: string } }) {
    return this.adminAuthService.me(request.admin!.id);
  }

  @Put('avatar')
  async updateAvatar(@Req() request: Request & { admin?: { id: string } }) {
    const mimeType = String(request.headers['content-type'] ?? '').split(';')[0].trim().toLowerCase();
    const imageData = await readRequestBody(request);
    return this.adminAuthService.updateAvatar(request.admin!.id, imageData, mimeType);
  }

  @Delete('avatar')
  deleteAvatar(@Req() request: { admin?: { id: string } }) {
    return this.adminAuthService.deleteAvatar(request.admin!.id);
  }

  @Patch('password')
  changePassword(
    @Req() request: { admin?: { id: string } },
    @Body() body: ChangeAdminPasswordDto,
  ) {
    return this.adminAuthService.changePassword(request.admin!.id, body);
  }

  @Public()
  @Post('login')
  login(
    @Body() body: AdminLoginDto,
    @Req() request: { ip?: string; headers: Record<string, string | string[] | undefined> },
  ) {
    const userAgent = request.headers['user-agent'];

    return this.adminAuthService.login(body, {
      ipAddress: request.ip,
      userAgent: Array.isArray(userAgent) ? userAgent.join(', ') : userAgent,
    });
  }
}

function readRequestBody(request: Request) {
  return new Promise<Buffer>((resolve, reject) => {
    const chunks: Buffer[] = [];

    request.on('data', (chunk: Buffer | string) => {
      chunks.push(Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk));
    });
    request.on('end', () => resolve(Buffer.concat(chunks)));
    request.on('error', reject);
  });
}