import encryption from '@adonisjs/core/services/encryption'
import cache from '@adonisjs/cache/services/main'
import env from '#start/env'

export class AuthService {
  async generateCode(email: string, expiresIn: string) {
    // TODO: Generate magic link token
    // const identifier = email
    // const token = encryption.encrypt(identifier, expiresIn)
    // const magicLink = env.get('PUBLIC_AUTH_URL') + '/success?signature=' + token

    // Generate code
    const formattedOTP = Math.floor(Math.random() * 1000000)
      .toString()
      .padStart(6, '0')
    await cache.set({
      key: 'auth:otp:' + formattedOTP,
      value: email,
      ttl: expiresIn,
    })

    const emailTitle = `${formattedOTP} est votre code de vérification pour ${env.get('APP_NAME')}`
    return {
      emailTitle,
      formattedOTP,
      // magicLink,
      expiresIn,
      email,
      // token,
    }
  }

  async validateCode(code: string) {
    // Validate code
    const key = 'auth:otp:' + code
    const email = await cache.get({ key })
    if (!email) return { success: false, email: null }

    // Delete code from cache
    await cache.delete({ key })

    return {
      email,
      success: true,
    }
  }

  generateToken(email: string, expiresIn: string) {
    // Generate token
    const identifier = email.toLowerCase()
    const token = encryption.encrypt(identifier, expiresIn)

    return {
      token,
      expiresIn,
      email: identifier,
    }
  }

  validateToken(token: string) {
    // Decrypt token
    const decrypted = encryption.decrypt(token)
    if (!decrypted) return { success: false, email: null }

    // Validate email format
    const email = (decrypted as string).toLowerCase()
    if (!email.includes('@')) return { success: false, email: null }

    return {
      success: true,
      email,
    }
  }
}