import type { HttpContext } from '@adonisjs/core/http'
import { registerValidator, requestLoginValidator, verifyCodeValidator } from '#validators/auth'
import mail from '@adonisjs/mail/services/main'
import { AuthService } from '#services/auth_service'
import { inject } from '@adonisjs/core'
import app from '@adonisjs/core/services/app'
import env from '#start/env'
import User from '#models/user'

@inject()
export default class AuthController {
  constructor(private authService: AuthService) { }

  // POST /auth/request
  async requestLogin({ request, response, captcha }: HttpContext) {
    // Validate captcha
    if (app.inProduction) {
      const validateResult = await (captcha.use('turnstile') as any).validate()
      if (!validateResult.success) {
        return response.badRequest({
          success: false,
          message: 'Veuillez valider le captcha',
          error: validateResult.errorCodes,
        })
      }
    }

    const { email } = await request.validateUsing(requestLoginValidator)

    // Generate token
    const expiresIn = '15 minutes'
    const payload = await this.authService.generateCode(email, expiresIn)

    // Send email
    await mail
      .send((message) => {
        message
          .from(env.get('MAIL_FROM')!)
          .to(email)
          .subject(payload.emailTitle)
          .htmlView('mails/auth', payload)
          .textView('mails/auth-fallback', payload)
      })
      // TODO: Handle email sending errors
      .then(console.log)
      .catch(console.error)

    return {
      success: true,
    }
  }

  // POST /auth/verify
  async verifyCode({ request, response, auth }: HttpContext) {
    // Validate code
    const { code } = await request.validateUsing(verifyCodeValidator)
    const { success, email } = await this.authService.validateCode(code)
    if (!success) {
      return response.badRequest({
        success: false,
        message: 'Code de vérification invalide',
      })
    }

    // Find user by id
    const user = await User.findBy('email', email)
    if (!user) {
      // If the user does not exist, return a token for registration
      const expiresIn = '1 hour'
      const { token, email: userEmail } = this.authService.generateToken(email, expiresIn)
      return {
        token,
        email: userEmail,
        success: true,
      }
    }

    // Perform login
    await auth.use('web').login(user, true) // true for remember me
    return {
      success: true,
      user
    }
  }

  // POST /auth/register
  async register({ request, response, auth }: HttpContext) {
    const { firstName, lastName, className, token } = await request.validateUsing(registerValidator)

    // Validate token
    const { success, email } = this.authService.validateToken(token)
    if (!success || !email) {
      return response.badRequest({
        success: false,
        message: 'Votre lien de connexion est invalide ou a expiré.',
      })
    }

    // Check if user already exists
    const existingUser = await User.findBy('email', email)
    if (existingUser) {
      // If user already exists, perform login
      await auth.use('web').login(existingUser, true) // true for remember me
      return {
        success: true,
        user: existingUser,
      }
    }

    // TODO: Check if className is allowed (else redirect for account giving)

    // TODO: Rewrite user creation (NEVER CREATE USER - use string similarity)
    // Create new user
    const user = await User.create({
      firstName,
      lastName,
      className,
      email
    })
    // Perform login
    await auth.use('web').login(user, true) // true for remember me
    return {
      success: true,
      user
    }
  }

  // TODO: Magic link login
  // magicLink({ }: HttpContext) {
  //   // Validate signed url (adonis)
  //   // + login current device
  //   // + SSE to notify other devices (and login)
  // }

  // listen({ }: HttpContext) {
  //   // Listen for SSE events
  //   // Need an AUTH token to connect
  //   // AUTH token sent to client in requestLogin
  // }
}