/**
 * ServerManager - Main Application JavaScript
 * ES6+ Modules and utilities
 */

(function () {
    'use strict';

    /* ==========================================================================
       Sidebar Toggle
       ========================================================================== */

    const sidebar = document.getElementById('sidebar');
    const sidebarToggle = document.getElementById('sidebarToggle');

    if (sidebarToggle && sidebar) {
        sidebarToggle.addEventListener('click', function () {
            const isCollapsed = sidebar.classList.toggle('collapsed');
            try { localStorage.setItem('sidebar_collapsed', isCollapsed ? '1' : '0'); } catch (e) {}
        });

        try {
            if (window.innerWidth > 768 && localStorage.getItem('sidebar_collapsed') === '1') {
                sidebar.classList.add('collapsed');
            }
        } catch (e) {}
    }

    /* ==========================================================================
       Theme Toggle
       ========================================================================== */

    const themeToggle = document.getElementById('themeToggle');

    if (themeToggle) {
        const savedTheme = localStorage.getItem('theme') || 'dark';
        document.documentElement.setAttribute('data-theme', savedTheme);
        updateThemeIcon(savedTheme);

        themeToggle.addEventListener('click', function () {
            const current = document.documentElement.getAttribute('data-theme');
            const next = current === 'dark' ? 'light' : 'dark';
            document.documentElement.setAttribute('data-theme', next);
            localStorage.setItem('theme', next);
            updateThemeIcon(next);
        });
    }

    function updateThemeIcon(theme) {
        if (!themeToggle) return;
        const icon = themeToggle.querySelector('i');
        if (icon) {
            icon.className = theme === 'dark' ? 'fas fa-sun' : 'fas fa-moon';
        }
    }

    /* ==========================================================================
       Toast Notifications
       ========================================================================== */

    window.showToast = function (type, message) {
        const container = document.getElementById('toastContainer');
        if (!container) return;

        const toast = document.createElement('div');
        toast.className = 'toast toast-' + type;
        toast.innerHTML = `
            <div class="toast-body">
                <i class="fas fa-${type === 'success' ? 'check-circle' :
                               type === 'error' ? 'times-circle' :
                               type === 'warning' ? 'exclamation-triangle' : 'info-circle'}"></i>
                ${escapeHtml(message)}
            </div>
            <button class="toast-close">&times;</button>
        `;

        container.appendChild(toast);

        const closeBtn = toast.querySelector('.toast-close');
        closeBtn.addEventListener('click', function () {
            toast.remove();
        });

        setTimeout(() => {
            if (toast.parentNode) {
                toast.style.opacity = '0';
                toast.style.transition = 'opacity 0.3s ease';
                setTimeout(() => toast.remove(), 300);
            }
        }, 5000);
    };

    function escapeHtml(text) {
        const div = document.createElement('div');
        div.textContent = text;
        return div.innerHTML;
    }

    /* ==========================================================================
       Auto-dismiss Toasts
       ========================================================================== */

    document.addEventListener('DOMContentLoaded', function () {
        document.querySelectorAll('.toast[data-autohide="true"]').forEach(function (toast) {
            setTimeout(() => {
                toast.style.opacity = '0';
                toast.style.transition = 'opacity 0.3s ease';
                setTimeout(() => toast.remove(), 300);
            }, 5000);
        });
    });

    /* ==========================================================================
       Password Toggle
       ========================================================================== */

    document.addEventListener('click', function (e) {
        const toggle = e.target.closest('.input-toggle-password');
        if (!toggle) return;

        const input = toggle.parentElement.querySelector('input');
        const icon = toggle.querySelector('i');

        if (input) {
            const isPassword = input.type === 'password';
            input.type = isPassword ? 'text' : 'password';
            if (icon) {
                icon.className = isPassword ? 'fas fa-eye-slash' : 'fas fa-eye';
            }
        }
    });

    /* ==========================================================================
       Dropdowns
       ========================================================================== */

    document.addEventListener('click', function (e) {
        const toggle = e.target.closest('.dropdown-toggle');
        if (toggle) {
            const dropdown = toggle.closest('.dropdown');
            const wasActive = dropdown.classList.contains('active');

            document.querySelectorAll('.dropdown.active').forEach(d => {
                d.classList.remove('active');
            });

            if (!wasActive) {
                dropdown.classList.add('active');
            }
            e.preventDefault();
            return;
        }

        if (!e.target.closest('.dropdown')) {
            document.querySelectorAll('.dropdown.active').forEach(d => {
                d.classList.remove('active');
            });
        }
    });

    /* ==========================================================================
       Dashboard Auto-Refresh
       ========================================================================== */

    const refreshBtn = document.getElementById('refreshBtn');
    let autoRefreshInterval = null;
    const AUTO_REFRESH_MS = 30000;

    if (refreshBtn) {
        refreshBtn.addEventListener('click', function () {
            if (autoRefreshInterval) {
                clearInterval(autoRefreshInterval);
                autoRefreshInterval = null;
                refreshBtn.classList.remove('spinning');
                showToast('info', 'Auto-refresh disabled');
            } else {
                autoRefreshInterval = setInterval(refreshDashboardStats, AUTO_REFRESH_MS);
                refreshBtn.classList.add('spinning');
                showToast('info', 'Auto-refresh enabled (30s)');
                refreshDashboardStats();
            }
        });
    }

    function refreshDashboardStats() {
        fetch('/dashboard/stats')
            .then(r => r.json())
            .then(data => {
                if (data.success && data.data) {
                    const stats = data.data;
                    const el = (id) => document.getElementById(id);
                    if (el('statTotalServers')) el('statTotalServers').textContent = stats.total_servers;
                    if (el('statOnlineServers')) el('statOnlineServers').textContent = stats.online_servers;
                    if (el('statOfflineServers')) el('statOfflineServers').textContent = stats.offline_servers;
                    if (el('statAvgCpu')) el('statAvgCpu').textContent = stats.avg_cpu + '%';
                    if (el('statAvgRam')) el('statAvgRam').textContent = stats.avg_ram + '%';
                    if (el('statAvgDisk')) el('statAvgDisk').textContent = stats.avg_disk + '%';
                }
            })
            .catch(() => {});
    }

    /* ==========================================================================
       API Request Helper
       ========================================================================== */

    window.api = {
        get: function (url) {
            return fetch(url, {
                headers: {
                    'Accept': 'application/json',
                    'Authorization': 'Bearer ' + (localStorage.getItem('api_token') || ''),
                },
            }).then(r => r.json());
        },

        post: function (url, data) {
            return fetch(url, {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                    'Accept': 'application/json',
                    'Authorization': 'Bearer ' + (localStorage.getItem('api_token') || ''),
                },
                body: JSON.stringify(data),
            }).then(r => r.json());
        },

        put: function (url, data) {
            return fetch(url, {
                method: 'PUT',
                headers: {
                    'Content-Type': 'application/json',
                    'Accept': 'application/json',
                    'Authorization': 'Bearer ' + (localStorage.getItem('api_token') || ''),
                },
                body: JSON.stringify(data),
            }).then(r => r.json());
        },

        delete: function (url) {
            return fetch(url, {
                method: 'DELETE',
                headers: {
                    'Accept': 'application/json',
                    'Authorization': 'Bearer ' + (localStorage.getItem('api_token') || ''),
                },
            }).then(r => r.json());
        },
    };

    /* ==========================================================================
       Console Info
       ========================================================================== */

    console.log(
        '%c ServerManager %c v1.0.0 ',
        'background:#6366f1;color:white;padding:4px 8px;border-radius:4px 0 0 4px;font-weight:bold;',
        'background:#1a1d2b;color:#9ca3af;padding:4px 8px;border-radius:0 4px 4px 0;'
    );
    console.log('%cLinux Server Management Platform', 'color:#6b7280;font-style:italic;');
})();