{% extends "base.html" %}

{% block title %}Calendario{% endblock %}

{% block content %}
<div class="animate-fade-in">
    <!-- Header -->
    <div class="flex items-center justify-between mb-8">
        <div>
            <h1 class="text-3xl font-bold">Calendario</h1>
            <p class="text-gray-400 mt-1">Visualiza y programa tus publicaciones</p>
        </div>
        <div class="flex gap-3">
            <button onclick="prevMonth()" class="btn-secondary px-4 py-2 rounded-xl flex items-center gap-2">
                <span>←</span> Anterior
            </button>
            <h2 class="text-xl font-bold px-4 py-2" id="current-month">Enero 2025</h2>
            <button onclick="nextMonth()" class="btn-secondary px-4 py-2 rounded-xl flex items-center gap-2">
                Siguiente <span>→</span>
            </button>
        </div>
    </div>

    <!-- View Controls -->
    <div class="card rounded-2xl p-4 mb-6">
        <div class="flex flex-wrap gap-4 items-center justify-between">
            <div class="flex gap-2">
                <button onclick="setView('month')" id="btn-month" class="btn-primary px-4 py-2 rounded-xl">
                    Mes
                </button>
                <button onclick="setView('week')" id="btn-week" class="btn-secondary px-4 py-2 rounded-xl">
                    Semana
                </button>
                <button onclick="goToToday()" class="btn-secondary px-4 py-2 rounded-xl">
                    Hoy
                </button>
            </div>
            <div class="flex gap-4 items-center">
                <span class="text-gray-400 text-sm">Filtrar:</span>
                <label class="flex items-center gap-2 cursor-pointer">
                    <input type="checkbox" checked class="platform-filter w-4 h-4 rounded" value="x" onchange="filterCalendar()">
                    <span class="text-sm bg-dark-700 px-2 py-1 rounded-lg">X</span>
                </label>
                <label class="flex items-center gap-2 cursor-pointer">
                    <input type="checkbox" checked class="platform-filter w-4 h-4 rounded" value="facebook" onchange="filterCalendar()">
                    <span class="text-sm bg-blue-600/30 text-blue-400 px-2 py-1 rounded-lg">Facebook</span>
                </label>
                <label class="flex items-center gap-2 cursor-pointer">
                    <input type="checkbox" checked class="platform-filter w-4 h-4 rounded" value="instagram" onchange="filterCalendar()">
                    <span class="text-sm bg-pink-600/30 text-pink-400 px-2 py-1 rounded-lg">Instagram</span>
                </label>
                <label class="flex items-center gap-2 cursor-pointer">
                    <input type="checkbox" checked class="platform-filter w-4 h-4 rounded" value="threads" onchange="filterCalendar()">
                    <span class="text-sm bg-dark-700 px-2 py-1 rounded-lg">Threads</span>
                </label>
            </div>
            <div class="flex gap-3 text-xs">
                <span class="flex items-center gap-1"><span class="w-2 h-2 rounded-full bg-blue-500"></span> Programado</span>
                <span class="flex items-center gap-1"><span class="w-2 h-2 rounded-full bg-yellow-500"></span> Pendiente</span>
                <span class="flex items-center gap-1"><span class="w-2 h-2 rounded-full bg-green-500"></span> Publicado</span>
            </div>
        </div>
    </div>

    <!-- Calendar Grid -->
    <div id="month-view" class="card rounded-2xl overflow-hidden">
        <!-- Day Headers -->
        <div class="grid grid-cols-7 bg-dark-800">
            <div class="p-3 text-center font-semibold border-r border-dark-600">Lun</div>
            <div class="p-3 text-center font-semibold border-r border-dark-600">Mar</div>
            <div class="p-3 text-center font-semibold border-r border-dark-600">Mié</div>
            <div class="p-3 text-center font-semibold border-r border-dark-600">Jue</div>
            <div class="p-3 text-center font-semibold border-r border-dark-600">Vie</div>
            <div class="p-3 text-center font-semibold border-r border-dark-600 text-primary">Sáb</div>
            <div class="p-3 text-center font-semibold text-primary">Dom</div>
        </div>

        <!-- Calendar Days -->
        <div id="calendar-grid" class="grid grid-cols-7">
            <!-- Days filled dynamically -->
        </div>
    </div>

    <!-- Week View (hidden by default) -->
    <div id="week-view" class="card rounded-2xl hidden">
        <div id="week-grid" class="divide-y divide-dark-600">
            <!-- Week days filled dynamically -->
        </div>
    </div>
</div>

<!-- Post Detail Modal -->
<div id="post-modal" class="fixed inset-0 bg-black/70 backdrop-blur-sm hidden items-center justify-center z-50">
    <div class="card rounded-2xl p-6 max-w-lg w-full mx-4">
        <div class="flex justify-between items-center mb-4">
            <h3 class="font-semibold text-lg">Detalle del Post</h3>
            <button onclick="closePostModal()" class="text-gray-400 hover:text-white text-xl">✕</button>
        </div>
        <div id="post-modal-content">
            <!-- Content loaded dynamically -->
        </div>
    </div>
</div>
{% endblock %}

{% block extra_scripts %}
<style>
    .calendar-day { min-height: 120px; }
    .calendar-day:hover { background-color: rgba(99, 102, 241, 0.1); }
    .calendar-day.today { border: 2px solid #6366f1; }
    .calendar-day.other-month { opacity: 0.4; }
    .post-item { font-size: 11px; padding: 2px 6px; border-radius: 6px; margin-bottom: 2px; cursor: pointer; }
    .post-item:hover { opacity: 0.8; }
    .status-published { background-color: rgba(16, 185, 129, 0.3); color: #34d399; }
    .status-scheduled { background-color: rgba(59, 130, 246, 0.3); color: #60a5fa; }
    .status-pending_approval { background-color: rgba(245, 158, 11, 0.3); color: #fbbf24; }
</style>
<script>
    let currentDate = new Date();
    let currentView = 'month';
    let calendarData = {};

    window.addEventListener('load', () => {
        loadCalendarData();
    });

    async function loadCalendarData() {
        const year = currentDate.getFullYear();
        const month = currentDate.getMonth();

        const firstDay = new Date(year, month, 1);
        const startDate = new Date(firstDay);
        startDate.setDate(startDate.getDate() - (startDate.getDay() || 7) + 1);

        try {
            const response = await fetch(
                `/api/calendar/posts/view?start_date=${formatDateISO(startDate)}&days=42`
            );
            const data = await response.json();
            calendarData = data.calendar || {};
            renderCalendar();
        } catch (error) {
            console.error('Error loading calendar:', error);
        }
    }

    function renderCalendar() {
        if (currentView === 'month') {
            renderMonthView();
        } else {
            renderWeekView();
        }

        const months = ['Enero', 'Febrero', 'Marzo', 'Abril', 'Mayo', 'Junio',
                       'Julio', 'Agosto', 'Septiembre', 'Octubre', 'Noviembre', 'Diciembre'];
        document.getElementById('current-month').textContent =
            `${months[currentDate.getMonth()]} ${currentDate.getFullYear()}`;
    }

    function renderMonthView() {
        const grid = document.getElementById('calendar-grid');
        const year = currentDate.getFullYear();
        const month = currentDate.getMonth();

        const firstDay = new Date(year, month, 1);
        const startDate = new Date(firstDay);
        startDate.setDate(startDate.getDate() - (startDate.getDay() || 7) + 1);

        const today = new Date();
        today.setHours(0, 0, 0, 0);

        const platforms = getSelectedPlatforms();
        let html = '';

        for (let i = 0; i < 42; i++) {
            const date = new Date(startDate);
            date.setDate(date.getDate() + i);

            const dateKey = formatDateISO(date);
            const isToday = date.getTime() === today.getTime();
            const isOtherMonth = date.getMonth() !== month;

            const dayPosts = (calendarData[dateKey] || []).filter(post =>
                post.platforms && post.platforms.some(p => platforms.includes(p))
            );

            html += `
                <div class="calendar-day p-2 border-r border-b border-dark-600 ${isToday ? 'today' : ''} ${isOtherMonth ? 'other-month' : ''}"
                     ondrop="dropPost(event, '${dateKey}')" ondragover="allowDrop(event)">
                    <div class="font-semibold text-sm mb-1 ${isToday ? 'text-primary' : ''}">${date.getDate()}</div>
                    <div class="space-y-1">
                        ${dayPosts.slice(0, 4).map(post => `
                            <div class="post-item status-${post.status} truncate"
                                 draggable="true"
                                 ondragstart="dragPost(event, ${post.id})"
                                 onclick="showPostDetail(${post.id})">
                                ${post.platforms ? post.platforms[0].charAt(0).toUpperCase() : '?'}:
                                ${escapeHtml(post.content || '').substring(0, 20)}
                            </div>
                        `).join('')}
                        ${dayPosts.length > 4 ? `<div class="text-xs text-gray-400">+${dayPosts.length - 4} más</div>` : ''}
                    </div>
                </div>
            `;
        }

        grid.innerHTML = html;
    }

    function renderWeekView() {
        const container = document.getElementById('week-grid');
        const weekStart = new Date(currentDate);
        weekStart.setDate(weekStart.getDate() - weekStart.getDay() + 1);

        const platforms = getSelectedPlatforms();
        const days = ['Lunes', 'Martes', 'Miércoles', 'Jueves', 'Viernes', 'Sábado', 'Domingo'];
        const today = new Date();
        today.setHours(0, 0, 0, 0);

        let html = '';

        for (let i = 0; i < 7; i++) {
            const date = new Date(weekStart);
            date.setDate(date.getDate() + i);
            const dateKey = formatDateISO(date);
            const isToday = date.getTime() === today.getTime();

            const dayPosts = (calendarData[dateKey] || []).filter(post =>
                post.platforms && post.platforms.some(p => platforms.includes(p))
            );

            html += `
                <div class="p-4 ${isToday ? 'bg-primary/10' : ''}" ondrop="dropPost(event, '${dateKey}')" ondragover="allowDrop(event)">
                    <div class="flex items-center gap-4 mb-3">
                        <div class="font-semibold ${isToday ? 'text-primary' : ''}">${days[i]}</div>
                        <div class="text-gray-400">${date.getDate()}/${date.getMonth() + 1}</div>
                        ${isToday ? '<span class="bg-primary text-white text-xs px-2 py-1 rounded-full">Hoy</span>' : ''}
                    </div>
                    <div class="grid grid-cols-4 gap-2">
                        ${dayPosts.map(post => `
                            <div class="post-item status-${post.status} p-2 rounded-lg"
                                 draggable="true"
                                 ondragstart="dragPost(event, ${post.id})"
                                 onclick="showPostDetail(${post.id})">
                                <div class="flex gap-1 mb-1">
                                    ${post.platforms ? post.platforms.map(p => `
                                        <span class="text-xs opacity-75">${p}</span>
                                    `).join('') : ''}
                                </div>
                                <div class="text-xs truncate">${escapeHtml(post.content || '').substring(0, 50)}</div>
                                <div class="text-xs text-gray-400 mt-1">
                                    ${post.scheduled_at ? new Date(post.scheduled_at).toLocaleTimeString('es-MX', {hour: '2-digit', minute: '2-digit'}) : ''}
                                </div>
                            </div>
                        `).join('') || '<div class="text-gray-500 text-sm">Sin posts</div>'}
                    </div>
                </div>
            `;
        }

        container.innerHTML = html;
    }

    function setView(view) {
        currentView = view;
        document.getElementById('btn-month').className = view === 'month' ? 'btn-primary px-4 py-2 rounded-xl' : 'btn-secondary px-4 py-2 rounded-xl';
        document.getElementById('btn-week').className = view === 'week' ? 'btn-primary px-4 py-2 rounded-xl' : 'btn-secondary px-4 py-2 rounded-xl';

        document.getElementById('month-view').classList.toggle('hidden', view !== 'month');
        document.getElementById('week-view').classList.toggle('hidden', view !== 'week');

        renderCalendar();
    }

    function prevMonth() {
        if (currentView === 'month') {
            currentDate.setMonth(currentDate.getMonth() - 1);
        } else {
            currentDate.setDate(currentDate.getDate() - 7);
        }
        loadCalendarData();
    }

    function nextMonth() {
        if (currentView === 'month') {
            currentDate.setMonth(currentDate.getMonth() + 1);
        } else {
            currentDate.setDate(currentDate.getDate() + 7);
        }
        loadCalendarData();
    }

    function goToToday() {
        currentDate = new Date();
        loadCalendarData();
    }

    function getSelectedPlatforms() {
        return Array.from(document.querySelectorAll('.platform-filter:checked')).map(el => el.value);
    }

    function filterCalendar() {
        renderCalendar();
    }

    let draggedPostId = null;

    function dragPost(event, postId) {
        draggedPostId = postId;
        event.dataTransfer.setData('text/plain', postId);
    }

    function allowDrop(event) {
        event.preventDefault();
    }

    async function dropPost(event, dateKey) {
        event.preventDefault();

        if (!draggedPostId) return;

        const newDate = new Date(dateKey + 'T12:00:00');

        try {
            await fetch(`/api/calendar/posts/${draggedPostId}/reschedule?scheduled_at=${newDate.toISOString()}`, {
                method: 'POST'
            });
            loadCalendarData();
        } catch (error) {
            alert('Error al reprogramar: ' + error.message);
        }

        draggedPostId = null;
    }

    function showPostDetail(postId) {
        let post = null;
        for (const dayPosts of Object.values(calendarData)) {
            post = dayPosts.find(p => p.id === postId);
            if (post) break;
        }

        if (!post) return;

        const content = `
            <div class="space-y-4">
                <div>
                    <span class="status-${post.status} px-2 py-1 rounded-lg text-xs">${post.status}</span>
                    ${post.platforms ? post.platforms.map(p => `<span class="bg-dark-700 px-2 py-1 rounded-lg text-xs ml-1">${p}</span>`).join('') : ''}
                </div>
                <p class="text-gray-300">${escapeHtml(post.content || '')}</p>
                <div class="text-gray-400 text-sm">
                    ${post.scheduled_at ? `Programado: ${new Date(post.scheduled_at).toLocaleString('es-MX')}` : ''}
                </div>
                <div class="flex gap-2 pt-4 border-t border-dark-600">
                    <a href="/posts" class="btn-secondary px-4 py-2 rounded-xl text-sm">Ver en Posts</a>
                    ${post.status === 'scheduled' ? `
                        <button onclick="publishNowFromModal(${post.id})" class="btn-primary px-4 py-2 rounded-xl text-sm">Publicar Ahora</button>
                    ` : ''}
                </div>
            </div>
        `;

        document.getElementById('post-modal-content').innerHTML = content;
        document.getElementById('post-modal').classList.remove('hidden');
        document.getElementById('post-modal').classList.add('flex');
    }

    function closePostModal() {
        document.getElementById('post-modal').classList.add('hidden');
        document.getElementById('post-modal').classList.remove('flex');
    }

    async function publishNowFromModal(postId) {
        try {
            await fetch(`/api/calendar/posts/${postId}/publish-now`, { method: 'POST' });
            closePostModal();
            loadCalendarData();
            showModal('<div class="text-center"><span class="text-4xl mb-4 block">🎉</span><p>Post enviado a publicación</p></div>');
        } catch (error) {
            showModal('<div class="text-center"><span class="text-4xl mb-4 block">❌</span><p>Error: ' + error.message + '</p></div>');
        }
    }

    function formatDateISO(date) {
        return date.toISOString().split('T')[0];
    }

    function escapeHtml(text) {
        const div = document.createElement('div');
        div.textContent = text;
        return div.innerHTML;
    }
</script>
{% endblock %}