/**
 * ToastManager - Sistema de Notificações Visuais
 * Gerencia notificações toast não-intrusivas para o usuário
 */
class ToastManager {
    constructor() {
        this.container = null;
        this.toasts = new Map();
        this.config = {
            position: 'top-right',
            duration: 5000,
            maxToasts: 5,
            animationDuration: 300
        };
        this.init();
    }

    init() {
        this.createContainer();
        console.log('🍞 ToastManager inicializado');
    }

    createContainer() {
        // Remover container existente se houver
        const existingContainer = document.querySelector('.toast-container');
        if (existingContainer) {
            existingContainer.remove();
        }

        // Criar novo container
        this.container = document.createElement('div');
        this.container.className = `toast-container toast-${this.config.position}`;
        this.container.style.cssText = `
            position: fixed;
            z-index: 10000;
            pointer-events: none;
        `;

        // Definir posição baseada na configuração
        this.setContainerPosition();
        
        document.body.appendChild(this.container);
    }

    setContainerPosition() {
        if (!this.container) return;

        const positions = {
            'top-right': { top: '20px', right: '20px', bottom: 'auto', left: 'auto' },
            'top-left': { top: '20px', left: '20px', bottom: 'auto', right: 'auto' },
            'top-center': { top: '20px', left: '50%', transform: 'translateX(-50%)', bottom: 'auto', right: 'auto' },
            'bottom-right': { bottom: '20px', right: '20px', top: 'auto', left: 'auto' },
            'bottom-left': { bottom: '20px', left: '20px', top: 'auto', right: 'auto' },
            'bottom-center': { bottom: '20px', left: '50%', transform: 'translateX(-50%)', top: 'auto', right: 'auto' }
        };

        const pos = positions[this.config.position] || positions['top-right'];
        Object.assign(this.container.style, pos);
    }

    show(message, type = 'info', duration = null, options = {}) {
        const toast = this.createToast(message, type, options);
        const toastId = toast.dataset.toastId;
        
        // Adicionar ao container
        this.container.appendChild(toast);
        
        // Armazenar referência
        this.toasts.set(toastId, toast);
        
        // Limitar número de toasts
        this.limitToasts();
        
        // Animar entrada
        requestAnimationFrame(() => {
            toast.classList.add('show');
        });
        
        // Configurar tempo de remoção
        const autoHideDuration = duration !== null ? duration : this.config.duration;
        if (autoHideDuration > 0) {
            setTimeout(() => {
                this.hide(toastId);
            }, autoHideDuration);
        }
        
        return toastId;
    }

    createToast(message, type, options) {
        const toast = document.createElement('div');
        const toastId = 'toast_' + Date.now() + '_' + Math.random().toString(36).substr(2, 9);
        
        toast.dataset.toastId = toastId;
        toast.className = `toast toast-${type}`;
        toast.style.cssText = `
            background: var(--toast-bg, #333);
            color: var(--toast-color, #fff);
            padding: 16px 20px;
            margin-bottom: 10px;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            font-size: 14px;
            line-height: 1.4;
            max-width: 400px;
            min-width: 300px;
            opacity: 0;
            transform: translateX(100%);
            transition: all ${this.config.animationDuration}ms ease;
            pointer-events: auto;
            position: relative;
            overflow: hidden;
        `;

        // Definir cores baseadas no tipo
        const colors = {
            success: { bg: '#22c55e', color: '#fff' },
            error: { bg: '#ef4444', color: '#fff' },
            warning: { bg: '#f59e0b', color: '#fff' },
            info: { bg: '#3b82f6', color: '#fff' }
        };

        const colorConfig = colors[type] || colors.info;
        toast.style.setProperty('--toast-bg', colorConfig.bg);
        toast.style.setProperty('--toast-color', colorConfig.color);

        // Adicionar ícone baseado no tipo
        const icons = {
            success: '✅',
            error: '❌',
            warning: '⚠️',
            info: 'ℹ️'
        };

        const icon = options.icon || icons[type] || icons.info;
        
        toast.innerHTML = `
            <div style="display: flex; align-items: flex-start; gap: 12px;">
                <span style="font-size: 16px; flex-shrink: 0;">${icon}</span>
                <div style="flex: 1;">${message}</div>
                <button onclick="toastManager.hide('${toastId}')" style="
                    background: none;
                    border: none;
                    color: inherit;
                    font-size: 18px;
                    cursor: pointer;
                    padding: 0;
                    margin-left: 8px;
                    opacity: 0.7;
                    transition: opacity 0.2s;
                " onmouseover="this.style.opacity=1" onmouseout="this.style.opacity=0.7">×</button>
            </div>
        `;

        return toast;
    }

    limitToasts() {
        if (this.toasts.size <= this.config.maxToasts) return;
        
        const toastsArray = Array.from(this.toasts.entries());
        const toRemove = toastsArray.slice(0, toastsArray.length - this.config.maxToasts);
        
        toRemove.forEach(([toastId]) => {
            this.hide(toastId);
        });
    }

    hide(toastId) {
        const toast = this.toasts.get(toastId);
        if (!toast) return;
        
        toast.classList.remove('show');
        
        setTimeout(() => {
            if (toast.parentNode) {
                toast.parentNode.removeChild(toast);
            }
            this.toasts.delete(toastId);
        }, this.config.animationDuration);
    }

    hideAll() {
        this.toasts.forEach((toast, toastId) => {
            this.hide(toastId);
        });
    }

    // Métodos de conveniência
    success(message, duration, options) {
        return this.show(message, 'success', duration, options);
    }

    error(message, duration, options) {
        return this.show(message, 'error', duration, options);
    }

    warning(message, duration, options) {
        return this.show(message, 'warning', duration, options);
    }

    info(message, duration, options) {
        return this.show(message, 'info', duration, options);
    }

    // Configurar posição
    setPosition(position) {
        if (['top-right', 'top-left', 'top-center', 'bottom-right', 'bottom-left', 'bottom-center'].includes(position)) {
            this.config.position = position;
            this.createContainer();
        }
    }

    // Obter estatísticas
    getStats() {
        return {
            activeToasts: this.toasts.size,
            maxToasts: this.config.maxToasts,
            position: this.config.position,
            duration: this.config.duration
        };
    }
}

// Tornar disponível globalmente
window.ToastManager = ToastManager;
window.toastManager = new ToastManager();