"""
Lehrer-Dashboard Modul fuer das BreakPilot Studio.

Ein frei konfigurierbares Dashboard mit Drag & Drop Widget-System.
Lehrer koennen ihre persoenliche Startseite aus verschiedenen Widgets zusammenstellen.
"""

from .widgets import (
    TodosWidget,
    SchnellzugriffWidget,
    NotizenWidget,
    StundenplanWidget,
    KlassenWidget,
    FehlzeitenWidget,
    ArbeitenWidget,
    NachrichtenWidget,
    MatrixWidget,
    AlertsWidget,
    StatistikWidget,
    KalenderWidget,
)


class LehrerDashboardModule:
    """
    Haupt-Modul fuer das konfigurierbare Lehrer-Dashboard.
    """

    @staticmethod
    def get_css() -> str:
        # Sammle CSS von allen Widgets
        widget_css = "\n".join([
            TodosWidget.get_css(),
            SchnellzugriffWidget.get_css(),
            NotizenWidget.get_css(),
            StundenplanWidget.get_css(),
            KlassenWidget.get_css(),
            FehlzeitenWidget.get_css(),
            ArbeitenWidget.get_css(),
            NachrichtenWidget.get_css(),
            MatrixWidget.get_css(),
            AlertsWidget.get_css(),
            StatistikWidget.get_css(),
            KalenderWidget.get_css(),
        ])

        return f"""
/* ===== Lehrer-Dashboard Styles ===== */
.lehrer-dashboard-container {{
    padding: 24px;
    max-width: 1400px;
    margin: 0 auto;
}}

/* Dashboard Header */
.dashboard-header {{
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 24px;
}}

.dashboard-greeting {{
    font-size: 24px;
    font-weight: 700;
    color: var(--bp-text, #e5e7eb);
    margin-bottom: 4px;
}}

.dashboard-date {{
    font-size: 14px;
    color: var(--bp-text-muted, #9ca3af);
}}

.dashboard-actions {{
    display: flex;
    gap: 8px;
}}

.dashboard-edit-btn {{
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--bp-surface, #1e293b);
    border: 1px solid var(--bp-border, #475569);
    border-radius: 8px;
    color: var(--bp-text, #e5e7eb);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
}}

.dashboard-edit-btn:hover {{
    background: var(--bp-surface-elevated, #334155);
    border-color: var(--bp-primary, #6C1B1B);
}}

.dashboard-edit-btn.active {{
    background: var(--bp-primary, #6C1B1B);
    border-color: var(--bp-primary, #6C1B1B);
    color: white;
}}

/* Widget Grid */
.dashboard-grid {{
    display: flex;
    flex-direction: column;
    gap: 16px;
}}

.dashboard-row {{
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}}

.dashboard-row.single {{
    grid-template-columns: 1fr;
}}

/* Widget Container */
.dashboard-widget {{
    position: relative;
    min-height: 200px;
}}

.dashboard-widget.full {{
    grid-column: 1 / -1;
}}

/* Widget Settings Button */
.widget-settings-btn {{
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--bp-text-muted, #9ca3af);
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s;
    font-size: 14px;
}}

.widget-settings-btn:hover {{
    background: var(--bp-surface-elevated, #334155);
    color: var(--bp-text, #e5e7eb);
}}

/* ===== Edit Mode Styles ===== */
.dashboard-edit-mode .widget-catalog {{
    display: block !important;
}}

.dashboard-edit-mode .dashboard-widget {{
    position: relative;
}}

.dashboard-edit-mode .dashboard-widget::after {{
    content: '';
    position: absolute;
    inset: 0;
    border: 2px dashed var(--bp-border, #475569);
    border-radius: 12px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
}}

.dashboard-edit-mode .dashboard-widget:hover::after {{
    opacity: 1;
}}

.dashboard-edit-mode .widget-remove-btn {{
    display: flex !important;
}}

/* Widget Remove Button */
.widget-remove-btn {{
    display: none;
    position: absolute;
    top: 8px;
    right: 8px;
    width: 24px;
    height: 24px;
    align-items: center;
    justify-content: center;
    background: rgba(239, 68, 68, 0.9);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 14px;
    z-index: 10;
    transition: all 0.2s;
}}

.widget-remove-btn:hover {{
    background: #ef4444;
    transform: scale(1.1);
}}

/* Widget Catalog */
.widget-catalog {{
    display: none;
    background: var(--bp-surface, #1e293b);
    border: 1px solid var(--bp-border, #475569);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 24px;
}}

.widget-catalog-title {{
    font-size: 14px;
    font-weight: 600;
    color: var(--bp-text, #e5e7eb);
    margin-bottom: 12px;
}}

.widget-catalog-grid {{
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}}

.widget-catalog-item {{
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: var(--bp-bg, #0f172a);
    border: 1px solid var(--bp-border-subtle, rgba(255,255,255,0.1));
    border-radius: 8px;
    cursor: grab;
    transition: all 0.2s;
    user-select: none;
}}

.widget-catalog-item:hover {{
    border-color: var(--bp-primary, #6C1B1B);
    transform: translateY(-2px);
}}

.widget-catalog-item:active {{
    cursor: grabbing;
}}

.widget-catalog-item.dragging {{
    opacity: 0.5;
}}

.widget-catalog-item.disabled {{
    opacity: 0.4;
    cursor: not-allowed;
}}

.widget-catalog-item-icon {{
    font-size: 16px;
}}

.widget-catalog-item-name {{
    font-size: 12px;
    font-weight: 500;
    color: var(--bp-text, #e5e7eb);
}}

/* Drop Zone */
.drop-zone {{
    display: none;
    min-height: 100px;
    border: 2px dashed var(--bp-border, #475569);
    border-radius: 12px;
    background: var(--bp-bg, #0f172a);
    transition: all 0.2s;
}}

.dashboard-edit-mode .drop-zone {{
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bp-text-muted, #9ca3af);
    font-size: 13px;
}}

.drop-zone.drag-over {{
    border-color: var(--bp-accent, #5ABF60);
    background: rgba(90, 191, 96, 0.1);
    color: var(--bp-accent, #5ABF60);
}}

/* Add Row Button */
.add-row-btn {{
    display: none;
    width: 100%;
    padding: 16px;
    background: transparent;
    border: 2px dashed var(--bp-border, #475569);
    border-radius: 12px;
    color: var(--bp-text-muted, #9ca3af);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
}}

.dashboard-edit-mode .add-row-btn {{
    display: block;
}}

.add-row-btn:hover {{
    border-color: var(--bp-accent, #5ABF60);
    color: var(--bp-accent, #5ABF60);
}}

/* Widget Settings Modal */
.widget-settings-modal {{
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}}

.widget-settings-modal.active {{
    display: flex;
}}

.widget-settings-content {{
    background: var(--bp-surface, #1e293b);
    border: 1px solid var(--bp-border, #475569);
    border-radius: 16px;
    padding: 24px;
    max-width: 400px;
    width: 90%;
}}

.widget-settings-title {{
    font-size: 18px;
    font-weight: 600;
    color: var(--bp-text, #e5e7eb);
    margin-bottom: 16px;
}}

.widget-settings-close {{
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--bp-text-muted, #9ca3af);
    cursor: pointer;
    border-radius: 8px;
    font-size: 18px;
}}

.widget-settings-close:hover {{
    background: var(--bp-surface-elevated, #334155);
}}

/* Responsive */
@media (max-width: 768px) {{
    .lehrer-dashboard-container {{
        padding: 16px;
    }}

    .dashboard-header {{
        flex-direction: column;
        gap: 16px;
    }}

    .dashboard-row {{
        grid-template-columns: 1fr;
    }}

    .dashboard-greeting {{
        font-size: 20px;
    }}

    .widget-catalog-grid {{
        flex-direction: column;
    }}

    .widget-catalog-item {{
        width: 100%;
    }}
}}

/* Widget CSS */
{widget_css}
"""

    @staticmethod
    def get_html() -> str:
        return """
<div class="panel panel-lehrer-dashboard" id="panel-lehrer-dashboard" style="display: none;">
    <div class="lehrer-dashboard-container">
        <!-- Header -->
        <div class="dashboard-header">
            <div>
                <div class="dashboard-greeting" id="dashboard-greeting">Guten Tag!</div>
                <div class="dashboard-date" id="dashboard-date"></div>
            </div>
            <div class="dashboard-actions">
                <button class="dashboard-edit-btn" id="dashboard-edit-btn" onclick="toggleDashboardEditMode()">
                    <span>&#127912;</span>
                    <span id="edit-btn-text">Anpassen</span>
                </button>
            </div>
        </div>

        <!-- Widget Catalog (Edit Mode) -->
        <div class="widget-catalog" id="widget-catalog">
            <div class="widget-catalog-title">Widget-Katalog (ziehen Sie Widgets auf Ihr Dashboard):</div>
            <div class="widget-catalog-grid" id="widget-catalog-grid">
                <!-- Wird dynamisch gefuellt -->
            </div>
        </div>

        <!-- Dashboard Grid -->
        <div class="dashboard-grid" id="dashboard-grid">
            <!-- Wird dynamisch gefuellt -->
        </div>

        <!-- Add Row Button -->
        <button class="add-row-btn" onclick="addDashboardRow()">+ Neue Reihe hinzufuegen</button>
    </div>

    <!-- Widget Settings Modal -->
    <div class="widget-settings-modal" id="widget-settings-modal">
        <div class="widget-settings-content">
            <button class="widget-settings-close" onclick="closeWidgetSettings()">&times;</button>
            <div class="widget-settings-title" id="widget-settings-title">Widget-Einstellungen</div>
            <div id="widget-settings-body">
                <!-- Wird dynamisch gefuellt -->
            </div>
        </div>
    </div>
</div>
"""

    @staticmethod
    def get_js() -> str:
        # Sammle JS von allen Widgets
        widget_js = "\n".join([
            TodosWidget.get_js(),
            SchnellzugriffWidget.get_js(),
            NotizenWidget.get_js(),
            StundenplanWidget.get_js(),
            KlassenWidget.get_js(),
            FehlzeitenWidget.get_js(),
            ArbeitenWidget.get_js(),
            NachrichtenWidget.get_js(),
            MatrixWidget.get_js(),
            AlertsWidget.get_js(),
            StatistikWidget.get_js(),
            KalenderWidget.get_js(),
        ])

        return f"""
// ===== Lehrer-Dashboard JavaScript =====
const DASHBOARD_LAYOUT_KEY = 'bp-dashboard-layout';
const LEHRER_PROFIL_KEY = 'bp-lehrer-profil';
let dashboardEditMode = false;
let lehrerDashboardInitialized = false;

// Widget Registry
const WidgetRegistry = {{
    stundenplan: {{
        id: 'stundenplan',
        name: 'Stundenplan',
        icon: '&#128197;',
        color: '#3b82f6',
        defaultWidth: 'half',
        init: initStundenplanWidget,
        getHtml: () => `{StundenplanWidget.get_html().replace('`', '\\`').replace('${', '\\${')}`
    }},
    klassen: {{
        id: 'klassen',
        name: 'Meine Klassen',
        icon: '&#128202;',
        color: '#8b5cf6',
        defaultWidth: 'half',
        init: initKlassenWidget,
        getHtml: () => `{KlassenWidget.get_html().replace('`', '\\`').replace('${', '\\${')}`
    }},
    fehlzeiten: {{
        id: 'fehlzeiten',
        name: 'Fehlzeiten',
        icon: '&#9888;',
        color: '#ef4444',
        defaultWidth: 'half',
        init: initFehlzeitenWidget,
        getHtml: () => `{FehlzeitenWidget.get_html().replace('`', '\\`').replace('${', '\\${')}`
    }},
    arbeiten: {{
        id: 'arbeiten',
        name: 'Arbeiten',
        icon: '&#128221;',
        color: '#f59e0b',
        defaultWidth: 'half',
        init: initArbeitenWidget,
        getHtml: () => `{ArbeitenWidget.get_html().replace('`', '\\`').replace('${', '\\${')}`
    }},
    todos: {{
        id: 'todos',
        name: 'To-Dos',
        icon: '&#10003;',
        color: '#10b981',
        defaultWidth: 'half',
        init: initTodosWidget,
        getHtml: () => `{TodosWidget.get_html().replace('`', '\\`').replace('${', '\\${')}`
    }},
    nachrichten: {{
        id: 'nachrichten',
        name: 'E-Mails',
        icon: '&#128231;',
        color: '#06b6d4',
        defaultWidth: 'half',
        init: initNachrichtenWidget,
        getHtml: () => `{NachrichtenWidget.get_html().replace('`', '\\`').replace('${', '\\${')}`
    }},
    matrix: {{
        id: 'matrix',
        name: 'Matrix-Chat',
        icon: '&#128172;',
        color: '#8b5cf6',
        defaultWidth: 'half',
        init: initMatrixWidget,
        getHtml: () => `{MatrixWidget.get_html().replace('`', '\\`').replace('${', '\\${')}`
    }},
    alerts: {{
        id: 'alerts',
        name: 'Google Alerts',
        icon: '&#128276;',
        color: '#f59e0b',
        defaultWidth: 'half',
        init: initAlertsWidget,
        getHtml: () => `{AlertsWidget.get_html().replace('`', '\\`').replace('${', '\\${')}`
    }},
    statistik: {{
        id: 'statistik',
        name: 'Statistik',
        icon: '&#128200;',
        color: '#3b82f6',
        defaultWidth: 'full',
        init: initStatistikWidget,
        getHtml: () => `{StatistikWidget.get_html().replace('`', '\\`').replace('${', '\\${')}`
    }},
    schnellzugriff: {{
        id: 'schnellzugriff',
        name: 'Schnellzugriff',
        icon: '&#9889;',
        color: '#6b7280',
        defaultWidth: 'full',
        init: initSchnellzugriffWidget,
        getHtml: () => `{SchnellzugriffWidget.get_html().replace('`', '\\`').replace('${', '\\${')}`
    }},
    notizen: {{
        id: 'notizen',
        name: 'Notizen',
        icon: '&#128203;',
        color: '#fbbf24',
        defaultWidth: 'half',
        init: initNotizenWidget,
        getHtml: () => `{NotizenWidget.get_html().replace('`', '\\`').replace('${', '\\${')}`
    }},
    kalender: {{
        id: 'kalender',
        name: 'Termine',
        icon: '&#128198;',
        color: '#ec4899',
        defaultWidth: 'half',
        init: initKalenderWidget,
        getHtml: () => `{KalenderWidget.get_html().replace('`', '\\`').replace('${', '\\${')}`
    }}
}};

// Default Layout
function getDefaultLayout() {{
    return {{
        version: 1,
        rows: [
            {{
                id: 'row-1',
                widgets: [
                    {{ widgetId: 'stundenplan', width: 'half' }},
                    {{ widgetId: 'klassen', width: 'half' }}
                ]
            }},
            {{
                id: 'row-2',
                widgets: [
                    {{ widgetId: 'fehlzeiten', width: 'half' }},
                    {{ widgetId: 'arbeiten', width: 'half' }}
                ]
            }},
            {{
                id: 'row-3',
                widgets: [
                    {{ widgetId: 'todos', width: 'half' }},
                    {{ widgetId: 'nachrichten', width: 'half' }}
                ]
            }},
            {{
                id: 'row-4',
                widgets: [
                    {{ widgetId: 'schnellzugriff', width: 'full' }}
                ]
            }}
        ]
    }};
}}

function loadDashboardLayout() {{
    const stored = localStorage.getItem(DASHBOARD_LAYOUT_KEY);
    return stored ? JSON.parse(stored) : getDefaultLayout();
}}

function saveDashboardLayout(layout) {{
    localStorage.setItem(DASHBOARD_LAYOUT_KEY, JSON.stringify(layout));
}}

function getGreeting() {{
    const hour = new Date().getHours();
    if (hour < 12) return 'Guten Morgen';
    if (hour < 18) return 'Guten Tag';
    return 'Guten Abend';
}}

function getLehrerName() {{
    const profil = localStorage.getItem(LEHRER_PROFIL_KEY);
    if (profil) {{
        try {{
            return JSON.parse(profil).name || 'Lehrer';
        }} catch (e) {{}}
    }}
    return '';
}}

function formatDashboardDate() {{
    return new Date().toLocaleDateString('de-DE', {{
        weekday: 'long',
        year: 'numeric',
        month: 'long',
        day: 'numeric'
    }});
}}

function renderDashboardHeader() {{
    const greetingEl = document.getElementById('dashboard-greeting');
    const dateEl = document.getElementById('dashboard-date');

    if (greetingEl) {{
        const name = getLehrerName();
        greetingEl.textContent = `${{getGreeting()}}${{name ? ', ' + name : ''}}!`;
    }}

    if (dateEl) {{
        dateEl.textContent = formatDashboardDate();
    }}
}}

function renderWidgetCatalog() {{
    const grid = document.getElementById('widget-catalog-grid');
    if (!grid) return;

    const layout = loadDashboardLayout();
    const usedWidgets = new Set();

    layout.rows.forEach(row => {{
        row.widgets.forEach(w => usedWidgets.add(w.widgetId));
    }});

    grid.innerHTML = Object.values(WidgetRegistry).map(widget => {{
        const isUsed = usedWidgets.has(widget.id);
        return `
            <div class="widget-catalog-item ${{isUsed ? 'disabled' : ''}}"
                 draggable="${{!isUsed}}"
                 data-widget-id="${{widget.id}}"
                 ondragstart="handleWidgetDragStart(event)"
                 ondragend="handleWidgetDragEnd(event)">
                <span class="widget-catalog-item-icon">${{widget.icon}}</span>
                <span class="widget-catalog-item-name">${{widget.name}}</span>
            </div>
        `;
    }}).join('');
}}

function renderDashboardGrid() {{
    const grid = document.getElementById('dashboard-grid');
    if (!grid) return;

    const layout = loadDashboardLayout();

    grid.innerHTML = layout.rows.map((row, rowIndex) => {{
        const isSingleFull = row.widgets.length === 1 && row.widgets[0].width === 'full';

        return `
            <div class="dashboard-row ${{isSingleFull ? 'single' : ''}}" data-row-id="${{row.id}}">
                ${{row.widgets.map((w, widgetIndex) => {{
                    const widget = WidgetRegistry[w.widgetId];
                    if (!widget) return '';

                    return `
                        <div class="dashboard-widget ${{w.width}}" data-widget-id="${{w.widgetId}}">
                            <button class="widget-remove-btn" onclick="removeWidget('${{row.id}}', ${{widgetIndex}})">&times;</button>
                            ${{widget.getHtml()}}
                        </div>
                    `;
                }}).join('')}}
                ${{dashboardEditMode && row.widgets.length < 2 ? `
                    <div class="drop-zone"
                         ondragover="handleDragOver(event)"
                         ondragleave="handleDragLeave(event)"
                         ondrop="handleDrop(event, '${{row.id}}')"
                         data-row-id="${{row.id}}">
                        Widget hier ablegen
                    </div>
                ` : ''}}
            </div>
        `;
    }}).join('');

    // Initialize all widgets
    layout.rows.forEach(row => {{
        row.widgets.forEach(w => {{
            const widget = WidgetRegistry[w.widgetId];
            if (widget && widget.init) {{
                setTimeout(() => widget.init(), 0);
            }}
        }});
    }});
}}

function toggleDashboardEditMode() {{
    dashboardEditMode = !dashboardEditMode;

    const container = document.querySelector('.lehrer-dashboard-container');
    const btn = document.getElementById('dashboard-edit-btn');
    const btnText = document.getElementById('edit-btn-text');

    if (container) {{
        if (dashboardEditMode) {{
            container.classList.add('dashboard-edit-mode');
        }} else {{
            container.classList.remove('dashboard-edit-mode');
        }}
    }}

    if (btn) {{
        btn.classList.toggle('active', dashboardEditMode);
    }}

    if (btnText) {{
        btnText.textContent = dashboardEditMode ? 'Fertig' : 'Anpassen';
    }}

    renderWidgetCatalog();
    renderDashboardGrid();
}}

function handleWidgetDragStart(event) {{
    const widgetId = event.target.dataset.widgetId;
    event.dataTransfer.setData('widget-id', widgetId);
    event.target.classList.add('dragging');
}}

function handleWidgetDragEnd(event) {{
    event.target.classList.remove('dragging');
}}

function handleDragOver(event) {{
    event.preventDefault();
    event.currentTarget.classList.add('drag-over');
}}

function handleDragLeave(event) {{
    event.currentTarget.classList.remove('drag-over');
}}

function handleDrop(event, rowId) {{
    event.preventDefault();
    event.currentTarget.classList.remove('drag-over');

    const widgetId = event.dataTransfer.getData('widget-id');
    if (!widgetId || !WidgetRegistry[widgetId]) return;

    const layout = loadDashboardLayout();
    const row = layout.rows.find(r => r.id === rowId);

    if (row && row.widgets.length < 2) {{
        const widget = WidgetRegistry[widgetId];
        row.widgets.push({{
            widgetId: widgetId,
            width: widget.defaultWidth === 'full' ? 'full' : 'half'
        }});

        saveDashboardLayout(layout);
        renderWidgetCatalog();
        renderDashboardGrid();
    }}
}}

function removeWidget(rowId, widgetIndex) {{
    const layout = loadDashboardLayout();
    const rowIndex = layout.rows.findIndex(r => r.id === rowId);

    if (rowIndex !== -1) {{
        layout.rows[rowIndex].widgets.splice(widgetIndex, 1);

        // Remove empty rows
        if (layout.rows[rowIndex].widgets.length === 0) {{
            layout.rows.splice(rowIndex, 1);
        }}

        saveDashboardLayout(layout);
        renderWidgetCatalog();
        renderDashboardGrid();
    }}
}}

function addDashboardRow() {{
    const layout = loadDashboardLayout();
    const newRowId = 'row-' + Date.now();

    layout.rows.push({{
        id: newRowId,
        widgets: []
    }});

    saveDashboardLayout(layout);
    renderDashboardGrid();
}}

function openWidgetSettings(widgetId) {{
    const modal = document.getElementById('widget-settings-modal');
    const title = document.getElementById('widget-settings-title');
    const body = document.getElementById('widget-settings-body');

    if (!modal || !title || !body) return;

    const widget = WidgetRegistry[widgetId];
    if (!widget) return;

    title.textContent = widget.name + ' - Einstellungen';
    body.innerHTML = `
        <p style="color: var(--bp-text-muted); font-size: 13px; text-align: center; padding: 24px;">
            Widget-Einstellungen werden in einer zukuenftigen Version verfuegbar sein.
        </p>
    `;

    modal.classList.add('active');
}}

function closeWidgetSettings() {{
    const modal = document.getElementById('widget-settings-modal');
    if (modal) {{
        modal.classList.remove('active');
    }}
}}

function loadLehrerDashboardModule() {{
    if (lehrerDashboardInitialized) {{
        console.log('Lehrer-Dashboard already initialized');
        return;
    }}

    console.log('Loading Lehrer-Dashboard Module...');

    renderDashboardHeader();
    renderWidgetCatalog();
    renderDashboardGrid();

    lehrerDashboardInitialized = true;
    console.log('Lehrer-Dashboard Module loaded successfully');
}}

// Widget JavaScript
{widget_js}
"""