using UnityEngine;
using UnityEngine.UI;
using System.Text.RegularExpressions;

[RequireComponent(typeof(InputField))]
public class EmailValidator : MonoBehaviour
{
    public GameObject Indicator; // ex: T_Indicator (optionnel)
    public Color ValidColor = Color.white;
    public Color InvalidColor = new Color(1f, 0.8f, 0.8f);

    InputField input;

    // Regex simple & fiable pour email
    static readonly Regex EmailRegex =
        new Regex(@"^[^@\s]+@[^@\s]+\.[^@\s]+$", RegexOptions.IgnoreCase);

    void Awake()
    {
        input = GetComponent<InputField>();
        input.onValueChanged.AddListener(OnValueChanged);
        input.onEndEdit.AddListener(OnEndEdit);
    }

    void OnDestroy()
    {
        input.onValueChanged.RemoveListener(OnValueChanged);
        input.onEndEdit.RemoveListener(OnEndEdit);
    }

    void OnValueChanged(string value)
    {
        Validate(value, false);
    }

    void OnEndEdit(string value)
    {
        Validate(value, true);
    }

    void Validate(string value, bool finalCheck)
    {
        value = Clean(value);

        bool valid = EmailRegex.IsMatch(value);

        // Couleur visuelle
        var colors = input.colors;
        colors.normalColor = valid ? ValidColor : InvalidColor;
        input.colors = colors;

        // Indicateur UI
        if (Indicator != null)
            Indicator.SetActive(!valid && finalCheck);

        // Stockage normalisé
        if (valid && finalCheck)
            input.text = value;
    }

    string Clean(string s)
    {
        if (string.IsNullOrEmpty(s)) return "";
        return s.Replace("\u200B", "").Trim().ToLowerInvariant();
    }

    // Pour appel externe (ex: CheckAllInput)
    public bool IsValid()
    {
        return EmailRegex.IsMatch(Clean(input.text));
    }
}