import {
  Body,
  Controller,
  Get,
  HttpCode,
  HttpStatus,
  Post,
  Req,
  Res,
} from '@nestjs/common';
import { ApiBearerAuth, ApiTags } from '@nestjs/swagger';
import { Throttle } from '@nestjs/throttler';
import type { Request, Response } from 'express';
import { Public } from './decorators/public.decorator';
import { AnyAuthenticatedUser } from './decorators/any-authenticated-user.decorator';
import { CurrentUser } from './decorators/current-user.decorator';
import type { AuthenticatedUser } from './types/authenticated-user';
import { LoginDto } from './dto/login.dto';
import { AccessTokenDto } from './dto/access-token.dto';
import { MfaVerifyDto } from './dto/mfa-verify.dto';
import { AuthService, CurrentUserProfile } from './auth.service';
import { SENSITIVE_ACTION_THROTTLE } from './util/throttle';
import {
  clearRefreshTokenCookie,
  extractRefreshToken,
  setRefreshTokenCookie,
} from './util/refresh-token-cookie';

export interface MfaRequiredResponse {
  mfaRequired: true;
  mfaToken: string;
}

@ApiTags('auth')
@Controller('auth')
export class AuthController {
  constructor(private readonly authService: AuthService) {}

  @Public()
  @Throttle(SENSITIVE_ACTION_THROTTLE)
  @Post('login')
  @HttpCode(HttpStatus.OK)
  async login(
    @Body() dto: LoginDto,
    @Res({ passthrough: true }) res: Response,
  ): Promise<AccessTokenDto | MfaRequiredResponse> {
    const result = await this.authService.login(dto.email, dto.password);
    if (result.mfaRequired) {
      return { mfaRequired: true, mfaToken: result.mfaToken };
    }
    setRefreshTokenCookie(res, result.refreshToken);
    return { accessToken: result.accessToken };
  }

  @Public()
  @Throttle(SENSITIVE_ACTION_THROTTLE)
  @Post('mfa/verify')
  @HttpCode(HttpStatus.OK)
  async verifyMfa(
    @Body() dto: MfaVerifyDto,
    @Res({ passthrough: true }) res: Response,
  ): Promise<AccessTokenDto> {
    const { accessToken, refreshToken } =
      await this.authService.verifyMfaAndLogin(dto.mfaToken, dto.code);
    setRefreshTokenCookie(res, refreshToken);
    return { accessToken };
  }

  @Public()
  @Throttle(SENSITIVE_ACTION_THROTTLE)
  @Post('refresh')
  @HttpCode(HttpStatus.OK)
  async refresh(
    @Req() req: Request,
    @Res({ passthrough: true }) res: Response,
  ): Promise<AccessTokenDto> {
    const { accessToken, refreshToken } = await this.authService.refresh(
      extractRefreshToken(req),
    );
    setRefreshTokenCookie(res, refreshToken);
    return { accessToken };
  }

  @Public()
  @Post('logout')
  @HttpCode(HttpStatus.NO_CONTENT)
  async logout(
    @Req() req: Request,
    @Res({ passthrough: true }) res: Response,
  ): Promise<void> {
    await this.authService.logout(extractRefreshToken(req));
    clearRefreshTokenCookie(res);
  }

  @ApiBearerAuth()
  @AnyAuthenticatedUser()
  @Get('me')
  me(@CurrentUser() user: AuthenticatedUser): Promise<CurrentUserProfile> {
    return this.authService.getCurrentUserProfile(user.id);
  }
}