document.addEventListener('DOMContentLoaded', function () {
    const presetContainer = document.getElementById('preset-container');
    const stopButton = document.querySelector('.stop-button');
    const currentStationName = document.getElementById('current-station-name');
    const presetModal = document.getElementById('preset-modal');
    const tableBody = document.querySelector('#sortable-tbody');
    const editPresetsButton = document.getElementById('edit-presets-button');
    const openSleepTimerModalButton = document.getElementById('open-sleep-timer-modal');
    const sleepTimerModal = document.getElementById('sleep-timer-modal');
    const closeSleepTimerModalButton = document.getElementById('close-sleep-timer-modal');
    const offSleepTimerModalButton = document.getElementById('off-sleep-timer-modal');
    let currentSound = null;
    let presets = [];
    let sleepTimerTimeout = null;
    let sleepTimerEndTime = null;

    initializeFooter();
    loadPresets();
    initializeEventListeners();

    function initializeFooter() {
        const currentYear = new Date().getFullYear();
        document.getElementById('current-year').textContent = currentYear;
        document.getElementById('server-name').textContent = window.location.hostname;
    }

    function updateTitle(stationName) {
        document.title = stationName ? `${stationName} - Radioplayer mit Presets` : "Radioplayer mit Presets";
    }

    function initializeEventListeners() {
        stopButton.addEventListener('click', stopPlayback);
        editPresetsButton.addEventListener('click', openModal);
    }

    async function loadPresets() {
        presets = JSON.parse(localStorage.getItem('presets')) || [];
        if (presets.length === 0) {
            try {
                const response = await fetch('webradio_presets.json');
                if (!response.ok) throw new Error('Datei konnte nicht geladen werden');
                presets = await response.json();
                localStorage.setItem('presets', JSON.stringify(presets));
            } catch (error) {
                alert('Fehler beim Laden der Presets: ' + error.message);
            }
        }
        displayPresets(presets);
        renderPresets();
        initSortable();
    }

    function displayPresets(presets) {
        presetContainer.innerHTML = '';
        presets.forEach(preset => addNewPreset(preset.name, preset.url));
    }

    function addNewPreset(name, url) {
        const presetItem = document.createElement('div');
        presetItem.classList.add('preset-item');
        presetItem.dataset.streamUrl = url;
        presetItem.innerHTML = `<h3>${name}</h3>`;
        presetItem.addEventListener('click', () => playStream(url, presetItem));
        presetContainer.appendChild(presetItem);
    }

    function renderPresets() {
        tableBody.innerHTML = '';
        presets.forEach((preset, index) => {
            const row = document.createElement('tr');
            row.setAttribute('data-index', index);
            row.innerHTML = `
                <td class="drag-handle">☰</td>
                <td><input type="text" value="${preset.name}" onchange="changeName(${index}, this.value)"></td>
                <td><input type="text" value="${preset.url}" onchange="changeURL(${index}, this.value)"></td>
                <td><button class="delete-btn" onclick="deletePreset(${index})"><i class="fas fa-trash-alt" style="color:grey"></i></button></td>
            `;
            tableBody.appendChild(row);
        });
    }

    openSleepTimerModalButton.addEventListener('click', function () {
        sleepTimerModal.classList.remove('hidden');
        sleepTimerModal.style.display = 'block';
        updateOffButtonVisibility();
    });

    closeSleepTimerModalButton.addEventListener('click', function () {
        sleepTimerModal.classList.add('hidden');
        sleepTimerModal.style.display = 'none';
    });

    offSleepTimerModalButton.addEventListener('click', function () {
        clearSleepTimer();
        sleepTimerModal.classList.add('hidden');
        sleepTimerModal.style.display = 'none';
    });

    document.querySelectorAll('.time-option').forEach(button => {
        button.addEventListener('click', function () {
            const timeInMilliseconds = button.getAttribute('data-time');
            startSleepTimer(parseInt(timeInMilliseconds));
            sleepTimerModal.classList.add('hidden');
            sleepTimerModal.style.display = 'none';
        });
    });

    function startSleepTimer(duration) {
        if (sleepTimerTimeout) {
            clearTimeout(sleepTimerTimeout);
        }
        sleepTimerEndTime = Date.now() + duration;
        sleepTimerTimeout = setTimeout(() => {
            stopPlayback();
            updateSleepTimerButton();
            updateOffButtonVisibility();
        }, duration);
        updateSleepTimerButton();
        updateOffButtonVisibility();
    }

    function clearSleepTimer() {
        if (sleepTimerTimeout) {
            clearTimeout(sleepTimerTimeout);
            sleepTimerTimeout = null;
            sleepTimerEndTime = null;
            openSleepTimerModalButton.textContent = 'Sleep Timer';
            updateOffButtonVisibility();
        }
    }

    function updateSleepTimerButton() {
        if (sleepTimerEndTime) {
            const remainingTime = Math.max(0, Math.ceil((sleepTimerEndTime - Date.now()) / 60000));
            openSleepTimerModalButton.innerHTML = `<i class="fas fa-hourglass-half"></i> ${remainingTime} Minuten`;
            if (remainingTime > 0) {
                setTimeout(updateSleepTimerButton, 60000); // Update every minute
            } else {
                openSleepTimerModalButton.textContent = 'Sleep Timer';
                sleepTimerEndTime = null;
                updateOffButtonVisibility();
            }
        }
    }

    function updateOffButtonVisibility() {
        if (sleepTimerTimeout) {
            offSleepTimerModalButton.style.display = 'inline-block';
        } else {
            offSleepTimerModalButton.style.display = 'none';
        }
    }

    function playStream(url, item) {
        stopPlayback();
        currentSound = new Howl({
            src: [url],
            html5: true,
            volume: 0.5,
            onplay: () => {
                stopButton.classList.remove('hidden');
                updateTitle(item.querySelector('h3').textContent);
                currentStationName.textContent = 'Es läuft: ' + item.querySelector('h3').textContent;
            },
            onstop: () => {
                stopButton.classList.add('hidden');
                currentStationName.textContent = 'Wähle einen Sender aus';
                updateTitle('');
            }
        });
        currentSound.play();
    }

    function stopPlayback() {
        if (currentSound) {
            currentSound.stop();
            currentSound = null;
        }
    }

    function openModal() {
        presetModal.classList.remove('hidden');
        presetModal.style.display = 'block';
        renderPresets();
    }

    window.closeModal = function() {
        presetModal.classList.add('hidden');
        presetModal.style.display = 'none';
    }

    window.addPreset = function() {
        presets.push({ name: 'Neuer Sender', url: '' });
        renderPresets();
    }

    window.changeName = function(index, newName) {
        presets[index].name = newName;
    }

    window.changeURL = function(index, newURL) {
        presets[index].url = newURL;
    }

    window.deletePreset = function(index) {
        presets.splice(index, 1);
        renderPresets();
    }

    window.saveAndClose = function() {
        savePresets();
        closeModal();
        location.reload();
    }

    function savePresets() {
        localStorage.setItem('presets', JSON.stringify(presets));
    }

    function initSortable() {
        const sortable = new Sortable(tableBody, {
            handle: '.drag-handle',
            animation: 150,
            onEnd: function (evt) {
                const newOrder = Array.from(tableBody.children).map(row => parseInt(row.getAttribute('data-index')));
                presets = newOrder.map(index => presets[index]);
            }
        });
    }

    window.exportPreset = function() {
        const presetsJSON = JSON.stringify(presets, null, 2);
        const blob = new Blob([presetsJSON], { type: 'application/json' });
        const url = URL.createObjectURL(blob);
        const a = document.createElement('a');
        a.href = url;
        a.download = 'radio_presets.json';
        document.body.appendChild(a);
        a.click();
        document.body.removeChild(a);
        URL.revokeObjectURL(url);
    }

    window.importPreset = function() {
        const input = document.createElement('input');
        input.type = 'file';
        input.accept = 'application/json';
        input.onchange = function(event) {
            const file = event.target.files[0];
            if (file) {
                const reader = new FileReader();
                reader.onload = function(e) {
                    try {
                        const importedPresets = JSON.parse(e.target.result);
                        presets = importedPresets;
                        localStorage.setItem('presets', JSON.stringify(presets));
                        renderPresets();
                        displayPresets(presets);
                        location.reload();
                    } catch (error) {
                        alert('Fehler beim Importieren der Presets: Ungültige Datei.');
                    }
                };
                reader.readAsText(file);
            }
        };
        input.click();
    }
});