// backend/src/modules/auth/auth.controller.ts

import {
  Controller,
  Post,
  Body,
  UseGuards,
  Req,
  Res,
  HttpCode,
  HttpStatus,
  Get
} from '@nestjs/common';
import type { Response } from 'express';
import {
  ApiTags,
  ApiOperation,
  ApiResponse,
  ApiBearerAuth,
  ApiBody,
  ApiUnauthorizedResponse,
  ApiBadRequestResponse
} from '@nestjs/swagger';

import { AuthService } from './auth.service';
import { LoginDto } from './dto/login.dto';
import { RegisterDto } from './dto/register.dto';
import { CreateOrganizationDto } from './dto/create-organization.dto';
import { JwtAuthGuard } from './guards/jwt-auth.guard';
import { LocalAuthGuard } from './guards/local-auth.guard';

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

  // =========================
  // LOGIN
  // =========================
  @Post('login')
  @HttpCode(HttpStatus.OK)
  @UseGuards(LocalAuthGuard)
  @ApiOperation({ summary: 'Login with email and password' })
  @ApiBody({ type: LoginDto })
  @ApiResponse({ status: 200, description: 'Login successful' })
  @ApiUnauthorizedResponse({ description: 'Invalid credentials' })
  @ApiBadRequestResponse({ description: 'Invalid input data' })
  async login(
    @Body() loginDto: LoginDto,
    @Req() req,
    @Res({ passthrough: true }) res: Response
  ) {
    console.log('Login endpoint hit');

    const result = await this.authService.login(loginDto, req.user);

    // ✅ SET COOKIES HERE
    this.setAuthCookies(res, result.data.accessToken, result.data.refreshToken);

    return {
      success: true,
      data: {
        user: result.data.user,
        organizations: result.data.organizations,
      },
    };
  }

  // =========================
  // REGISTER
  // =========================
  @Post('register')
  @ApiOperation({ summary: 'Register a new user' })
  @ApiBody({ type: RegisterDto })
  @ApiResponse({ status: 201, description: 'User registered successfully' })
  @ApiBadRequestResponse({ description: 'Invalid input data' })
  async register(
    @Body() registerDto: RegisterDto,
    @Res({ passthrough: true }) res: Response
  ) {
    console.log('Register endpoint hit');

    const result = await this.authService.register(registerDto);

    // ✅ SET COOKIES HERE
    this.setAuthCookies(res, result.data.accessToken, result.data.refreshToken);

    return {
      success: true,
      data: {
        user: result.data.user,
        organizations: result.data.organizations,
      },
    };
  }

  // =========================
  // SELECT ORGANIZATION
  // =========================
  @Post('select-organization')
  @UseGuards(JwtAuthGuard)
  @ApiBearerAuth('JWT-auth')
  async selectOrganization(
    @Req() req,
    @Body('organizationId') organizationId: string,
    @Res({ passthrough: true }) res: Response
  ) {
    const result = await this.authService.selectOrganization(
      req.user.id,
      organizationId
    );

    // 🔥 Replace access token with org-scoped token
    this.setAccessToken(res, result.data.accessToken);

    return {
      success: true,
      data: {
        organization: result.data.organization,
      },
    };
  }

  @Post('organizations')
  @UseGuards(JwtAuthGuard)
  @ApiBearerAuth('JWT-auth')
  @ApiOperation({ summary: 'Create organization for current user' })
  async createOrganization(@Req() req, @Body() dto: CreateOrganizationDto) {
    return this.authService.createOrganization(req.user.id, dto);
  }

  // =========================
  // PROFILE
  // =========================
  @Get('profile')
  @UseGuards(JwtAuthGuard)
  @ApiBearerAuth('JWT-auth')
  @ApiOperation({ summary: 'Get user profile' })
  @ApiResponse({ status: 200, description: 'Profile retrieved successfully' })
  @ApiUnauthorizedResponse({ description: 'Invalid or missing JWT token' })
  async getProfile(@Req() req) {
    console.log('Profile endpoint hit');
    console.log('USER FROM JWT:', req.user);

    return this.authService.getProfile(req.user.id);
  }

  @Get('subscription-alert')
  @UseGuards(JwtAuthGuard)
  @ApiBearerAuth('JWT-auth')
  @ApiOperation({
    summary:
      'Owner-only: seat / trial status for warning indicator (current org from JWT)',
  })
  async getSubscriptionAlert(@Req() req) {
    return this.authService.getOwnerSubscriptionAlert(
      req.user.id,
      req.user.organizationId,
    );
  }

  // =========================
  // LOGOUT
  // =========================
  @Post('logout')
  @HttpCode(HttpStatus.OK)
  @ApiOperation({ summary: 'Logout current user' })
  @ApiResponse({ status: 200, description: 'Logout successful' })
  async logout(@Req() req, @Res({ passthrough: true }) res: Response) {
    const accessToken = req?.cookies?.accessToken;

    if (accessToken) {
      await this.authService.logout(accessToken);
    }

    this.clearAuthCookies(res);

    return {
      success: true,
      message: 'Logged out successfully',
    };
  }

  // =========================
  // TEST
  // =========================
  @Get('test')
  @ApiOperation({ summary: 'Test endpoint' })
  test() {
    return { message: 'Auth controller is working!' };
  }

  // =========================
  // 🔥 COOKIE HELPERS
  // =========================
  private setAuthCookies(
    res: Response,
    accessToken: string,
    refreshToken: string
  ) {
    this.setAccessToken(res, accessToken);
    this.setRefreshToken(res, refreshToken);
  }

  private setAccessToken(res: Response, token: string) {
    res.cookie('accessToken', token, {
      httpOnly: true,
      secure: false, // ⚠️ true in production (HTTPS)
      sameSite: 'lax',
      path: '/',
    });
  }

  private setRefreshToken(res: Response, token: string) {
    res.cookie('refreshToken', token, {
      httpOnly: true,
      secure: false,
      sameSite: 'lax',
      path: '/',
    });
  }

  private clearAuthCookies(res: Response) {
    res.clearCookie('accessToken', {
      httpOnly: true,
      secure: false,
      sameSite: 'lax',
      path: '/',
    });
    res.clearCookie('refreshToken', {
      httpOnly: true,
      secure: false,
      sameSite: 'lax',
      path: '/',
    });
  }
}