/**
 ** Need more function for example
 ** !!! The vue is below !!!
 */

// CDN Vue Import
const { createApp, ref, computed } = Vue

// isValideEmail() (JUST EXAMPLE FOR SNIPPET)
// Helper function to validate email address
function isValidEmail(email) {
  const emailRegex = /^\S+@\S+\.\S+$/;
  return emailRegex.test(email);
}

// AuthService (JUST EXAMPLE FOR SNIPPET)
class AuthServiceClass {
  errors
  
  constructor() {
    this.errors = {};
  }

  register(inputs) {
    // Reset Errors
    this.errors = {};
    
    console.log(inputs)
    
    // Check the UserName field
    if (!inputs.userName) {
      this.errors.UserName = (this.errors?.UserName ?? []).concat("Username is required");
    }
    if (!inputs.userName || inputs.userName.length < 6) {
      this.errors.UserName = (this.errors?.UserName ?? []).concat("Minimum length of 6 characters is required");
    }

    // Check the EmailAddress field
    if (!inputs.emailAddress) {
      this.errors.EmailAddress = (this.errors?.EmailAddress ?? []).concat("Email Address is required");
    }
    if (!inputs.emailAddress || !isValidEmail(inputs.emailAddress)) {
      this.errors.EmailAddress = (this.errors?.EmailAddress ?? []).concat("Invalid Email Address");
    }

    // Check the Password field
    if (!inputs.password) {
      this.errors.Password = (this.errors?.Password ?? []).concat("Password is required");
    }
    if (!inputs.password || inputs.password.length < 8) {
      this.errors.Password = (this.errors?.Password ?? []).concat("Minimum length of 8 characters is required");
    }

    // Check the ConfirmPassword field
    if (!inputs.confirmPassword) {
      this.errors.ConfirmPassword = (this.errors?.ConfirmPassword ?? []).concat("Confirm Password is required");
    }
    
    // Return with Promise because its just a simulate your really AuthService.register
    return new Promise((resolve, reject) => {
      if (this.errors.length !== 0) {
        reject({ errors: this.errors });
      } else {
        resolve({ success: true, errors: null });
      }
    });
  }
}
// Import AuthService (JUST EXAMPLE FOR SNIPPET)
const AuthService = new AuthServiceClass()

// Declare useAuth() (JUST EXAMPLE FOR SNIPPET)
function useAuth()
{
    const errors = ref({}) 

    const register = async (request) => {
        await AuthService.register(request)
          .then(res => {
            console.log("AuthService Register Successfully Response", res)
          })
          .catch(err => {
            console.log("AuthService Register Error Response", err)
            const newErrors = err.errors;
            errors.value = newErrors
          })
    }
    
    return { register, errors }
}

/**
 ** !!!!!!
 ** Here's started vue code snippet
 */

// Component.vue
const app = createApp({
  setup() {
    // Get register() and errors Ref
    const { register, errors } = useAuth();

    // Declare Ref Object for inputs
    const request = ref({
      userName: "",
      emailAddress: "",
      password: "",
      confirmPassword: "",
    });

    // Declare Submit Function (async for Promise check !!!)
    const handleSubmit = async () => {
        console.log('') // just log
        console.log('Detect New Handle') // just log

        // call register() function with our value of inputs
        // wait answer by "await"
        await register(request.value);

        console.log('HandleSubmit - Check Error List', errors.value) // just log
    };
    
    // Just Extra Computed Value, not important
    // return true/false
    const hasError = computed(() => Object.keys(errors.value).length > 0)
    
    return { hasError, errors, request, handleSubmit }
  },
}).mount('#app')

.input {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 10px;
  max-width: 200px;
}

.error {
  color: red;
}

<!-- Component.vue -->

<script src="https://unpkg.com/vue@3.3.4/dist/vue.global.prod.js"></script>

<div id="app">
  <div>
    <!-- Display Errors -->
    <div v-if="hasError">
      <!-- errors is an object, so you can foreach its keys -->
      <div v-for="inputName of Object.keys(errors)">
        <span>{{ inputName }}:</span>
        <!-- name-array pairs can be directly printed as error messages -->
        <div v-for="errorMessage of errors[inputName]" class="error">
          {{ errorMessage }}
        </div>
      </div>
    </div>
    <!-- Inputs -->
    <!-- request is an object, so you can foreach its keys -->
    <div class="input" v-for="inputName of Object.keys(request)">
      <label>{{ inputName }}</label>
      <input v-model="request[inputName]" />
    </div>
    <!-- Submit Button -->
    <button @click="handleSubmit">Submit</button>
  </div>
</div>