/* ===================================
 * NETGESCON FORM HANDLER
 * ===================================
 * Gestione form con UX migliorata:
 * - Modal di conferma
 * - Progress indicators
 * - No refresh pagina
 * - Feedback immediato
 * =================================== */

class NetGesConFormHandler {
    constructor() {
        this.init();
    }

    init() {
        this.setupFormListeners();
        this.createLoadingModal();
        this.setupAjaxDefaults();
    }

    setupAjaxDefaults() {
        // Setup CSRF token per tutte le richieste AJAX
        $.ajaxSetup({
            headers: {
                'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
            }
        });
    }

    setupFormListeners() {
        // Intercetta tutti i form con classe 'netgescon-form'
        $(document).on('submit', '.netgescon-form', (e) => {
            e.preventDefault();
            this.handleFormSubmit(e.target);
        });

        // Intercetta i form di creazione/modifica stabili
        $(document).on('submit', 'form[action*="stabili"]', (e) => {
            if (!$(e.target).hasClass('netgescon-form')) {
                e.preventDefault();
                this.handleFormSubmit(e.target);
            }
        });
    }

    createLoadingModal() {
        const modalHtml = `
            <div id="netgescon-loading-modal" class="fixed inset-0 bg-black bg-opacity-50 hidden z-50">
                <div class="flex items-center justify-center min-h-screen p-4">
                    <div class="bg-white dark:bg-gray-800 rounded-lg shadow-xl p-6 max-w-sm w-full mx-auto">
                        <div class="text-center">
                            <div class="mx-auto flex items-center justify-center h-12 w-12 rounded-full bg-blue-100 dark:bg-blue-900 mb-4">
                                <i class="fas fa-spinner fa-spin text-blue-600 dark:text-blue-400 text-2xl"></i>
                            </div>
                            <h3 class="text-lg font-medium text-gray-900 dark:text-gray-100 mb-2">
                                Elaborazione in corso...
                            </h3>
                            <p class="text-sm text-gray-500 dark:text-gray-400" id="loading-message">
                                Attendere mentre salviamo i dati
                            </p>
                            <div class="mt-4">
                                <div class="bg-gray-200 dark:bg-gray-700 rounded-full h-2">
                                    <div class="bg-blue-600 h-2 rounded-full transition-all duration-300" 
                                         id="progress-bar" style="width: 0%"></div>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        `;
        
        $('body').append(modalHtml);
    }

    showLoadingModal(message = 'Elaborazione in corso...') {
        $('#loading-message').text(message);
        $('#progress-bar').css('width', '20%');
        $('#netgescon-loading-modal').removeClass('hidden');
        
        // Simula progress
        setTimeout(() => $('#progress-bar').css('width', '60%'), 500);
        setTimeout(() => $('#progress-bar').css('width', '80%'), 1000);
    }

    hideLoadingModal() {
        $('#progress-bar').css('width', '100%');
        setTimeout(() => {
            $('#netgescon-loading-modal').addClass('hidden');
            $('#progress-bar').css('width', '0%');
        }, 300);
    }

    handleFormSubmit(form) {
        const $form = $(form);
        const formData = new FormData(form);
        const action = $form.attr('action');
        const method = $form.attr('method') || 'POST';

        // Determina il messaggio di loading in base al form
        let loadingMessage = 'Salvataggio in corso...';
        if (action.includes('create') || method.toUpperCase() === 'POST') {
            loadingMessage = 'Creazione in corso...';
        } else if (action.includes('edit') || action.includes('update')) {
            loadingMessage = 'Aggiornamento in corso...';
        }

        this.showLoadingModal(loadingMessage);

        // Se il form ha un metodo specificato tramite _method, usalo
        const actualMethod = formData.get('_method') || method;

        $.ajax({
            url: action,
            type: method,
            data: formData,
            processData: false,
            contentType: false,
            success: (response) => {
                this.hideLoadingModal();
                this.handleSuccess(response, $form);
            },
            error: (xhr) => {
                this.hideLoadingModal();
                this.handleError(xhr, $form);
            }
        });
    }

    handleSuccess(response, $form) {
        // Mostra notifica di successo
        this.showNotification('Operazione completata con successo!', 'success');
        
        // Reindirizza se specificato nella risposta
        if (response.redirect) {
            setTimeout(() => {
                window.location.href = response.redirect;
            }, 1500);
        } else {
            // Altrimenti ricarica la pagina dopo un delay
            setTimeout(() => {
                window.location.reload();
            }, 1500);
        }
    }

    handleError(xhr, $form) {
        console.error('Form submission error:', xhr);
        
        let errorMessage = 'Si è verificato un errore. Riprova.';
        
        if (xhr.status === 422 && xhr.responseJSON && xhr.responseJSON.errors) {
            // Errori di validazione
            errorMessage = 'Errori di validazione:';
            const errors = xhr.responseJSON.errors;
            const errorList = Object.values(errors).flat();
            
            this.showValidationErrors(errorList, $form);
            return;
        } else if (xhr.responseJSON && xhr.responseJSON.message) {
            errorMessage = xhr.responseJSON.message;
        }
        
        this.showNotification(errorMessage, 'error');
    }

    showValidationErrors(errors, $form) {
        // Rimuovi errori precedenti
        $form.find('.error-message').remove();
        $form.find('.border-red-500').removeClass('border-red-500');
        
        // Mostra nuovo alert con errori
        const errorHtml = `
            <div class="error-message bg-red-50 border border-red-200 text-red-700 px-4 py-3 rounded mb-4">
                <div class="flex items-start">
                    <i class="fas fa-exclamation-triangle mr-2 mt-1"></i>
                    <div>
                        <h4 class="font-bold">Errori di validazione:</h4>
                        <ul class="mt-2 text-sm">
                            ${errors.map(error => `<li>• ${error}</li>`).join('')}
                        </ul>
                    </div>
                </div>
            </div>
        `;
        
        $form.prepend(errorHtml);
        
        // Scroll al primo errore
        $form[0].scrollIntoView({ behavior: 'smooth' });
    }

    showNotification(message, type = 'info') {
        const bgColor = type === 'success' ? 'bg-green-500' : 
                       type === 'error' ? 'bg-red-500' : 'bg-blue-500';
        
        const notification = $(`
            <div class="fixed top-4 right-4 ${bgColor} text-white px-6 py-4 rounded-lg shadow-lg z-50 transform translate-x-full transition-transform duration-300">
                <div class="flex items-center">
                    <i class="fas fa-${type === 'success' ? 'check' : type === 'error' ? 'exclamation-triangle' : 'info'} mr-2"></i>
                    <span>${message}</span>
                </div>
            </div>
        `);
        
        $('body').append(notification);
        
        // Mostra notifica
        setTimeout(() => {
            notification.removeClass('translate-x-full');
        }, 100);
        
        // Nascondi dopo 4 secondi
        setTimeout(() => {
            notification.addClass('translate-x-full');
            setTimeout(() => notification.remove(), 300);
        }, 4000);
    }
}

// Inizializza quando il DOM è pronto
$(document).ready(() => {
    // Verifica se jQuery è disponibile
    if (typeof $ === 'undefined') {
        console.warn('NetGesConFormHandler: jQuery non trovato, caricamento alternativo...');
        // Carica jQuery se non presente
        const script = document.createElement('script');
        script.src = 'https://code.jquery.com/jquery-3.6.0.min.js';
        script.onload = () => {
            new NetGesConFormHandler();
        };
        document.head.appendChild(script);
    } else {
        new NetGesConFormHandler();
    }
});

// Esporta per uso globale
window.NetGesConFormHandler = NetGesConFormHandler;