class ScreenStreamApp {
    constructor() {
        this.thumbnailInterval = null;
        this.durationInterval = null;
        this.isRecording = false;
        this.init();
    }

    init() {
        this.bindEvents();
        this.loadRecordings();
        this.checkRecordingStatus();
    }

    bindEvents() {
        document.getElementById('startBtn').addEventListener('click', () => this.startRecording());
        document.getElementById('stopBtn').addEventListener('click', () => this.stopRecording());
    }

    async checkRecordingStatus() {
        try {
            const response = await fetch('/duration');
            if (response.ok) {
                this.isRecording = true;
                this.updateUIForRecording();
                this.startLivePreview();
                this.startDurationTimer();
            } else {
                this.isRecording = false;
                this.updateUIForIdle();
                this.stopLivePreview();
                this.stopDurationTimer();
            }
        } catch (error) {
            console.error('Error checking recording status:', error);
            this.isRecording = false;
            this.updateUIForIdle();
        }
    }

    async startRecording() {
        const filename = document.getElementById('filename').value.trim() || 'recording_' + Date.now();
        const format = document.getElementById('format').value;

        try {
            const response = await fetch(`/start/${filename}?format=${format}`, {
                method: 'POST'
            });

            if (response.status === 204) {
                this.isRecording = true;
                this.updateUIForRecording();
                this.startLivePreview();
                this.startDurationTimer();
                this.showNotification('Recording started successfully!', 'success');
            } else {
                this.showNotification('Failed to start recording', 'error');
            }
        } catch (error) {
            console.error('Error starting recording:', error);
            this.showNotification('Error starting recording', 'error');
        }
    }

    async stopRecording() {
        try {
            const response = await fetch('/stop', {
                method: 'POST'
            });

            if (response.status === 204) {
                this.isRecording = false;
                this.updateUIForIdle();
                this.stopLivePreview();
                this.stopDurationTimer();
                this.showNotification('Recording stopped successfully!', 'success');
                this.loadRecordings();
            } else {
                this.showNotification('Failed to stop recording', 'error');
            }
        } catch (error) {
            console.error('Error stopping recording:', error);
            this.showNotification('Error stopping recording', 'error');
        }
    }

    updateUIForRecording() {
        document.getElementById('startBtn').disabled = true;
        document.getElementById('stopBtn').disabled = false;
        document.getElementById('statusDot').classList.remove('hidden');
        document.getElementById('statusText').textContent = 'Recording';
        document.getElementById('thumbnail').classList.remove('hidden');
        document.getElementById('noFeed').classList.add('hidden');
    }

    updateUIForIdle() {
        document.getElementById('startBtn').disabled = false;
        document.getElementById('stopBtn').disabled = true;
        document.getElementById('statusDot').classList.add('hidden');
        document.getElementById('statusText').textContent = 'Not Recording';
        document.getElementById('thumbnail').classList.add('hidden');
        document.getElementById('noFeed').classList.remove('hidden');
        document.getElementById('duration').textContent = '';
    }

    startLivePreview() {
        this.stopLivePreview();
        this.updateThumbnail();
        this.thumbnailInterval = setInterval(() => this.updateThumbnail(), 1000);
    }

    stopLivePreview() {
        if (this.thumbnailInterval) {
            clearInterval(this.thumbnailInterval);
            this.thumbnailInterval = null;
        }
    }

    async updateThumbnail() {
        const thumbnail = document.getElementById('thumbnail');
        try {
            const response = await fetch('/thumbnail');
            if (response.ok) {
                const blob = await response.blob();
                const url = URL.createObjectURL(blob);
                thumbnail.src = url + '?t=' + Date.now();
            }
        } catch (error) {
            console.error('Error updating thumbnail:', error);
        }
    }

    startDurationTimer() {
        this.stopDurationTimer();
        this.updateDuration();
        this.durationInterval = setInterval(() => this.updateDuration(), 1000);
    }

    stopDurationTimer() {
        if (this.durationInterval) {
            clearInterval(this.durationInterval);
            this.durationInterval = null;
        }
    }

    async updateDuration() {
        try {
            const response = await fetch('/duration');
            if (response.ok) {
                const duration = await response.text();
                document.getElementById('duration').textContent = this.formatDuration(parseInt(duration));
            }
        } catch (error) {
            console.error('Error updating duration:', error);
        }
    }

    formatDuration(seconds) {
        const hours = Math.floor(seconds / 3600);
        const minutes = Math.floor((seconds % 3600) / 60);
        const secs = seconds % 60;
        return `${hours.toString().padStart(2, '0')}:${minutes.toString().padStart(2, '0')}:${secs.toString().padStart(2, '0')}`;
    }

    async loadRecordings() {
        try {
            const response = await fetch('/videos');
            const videos = await response.json();
            this.renderRecordings(videos);
        } catch (error) {
            console.error('Error loading recordings:', error);
        }
    }

    renderRecordings(videos) {
        const container = document.getElementById('recordingsList');
        
        if (videos.length === 0) {
            container.innerHTML = `
                <div class="text-center py-8 text-gray-500">
                    <i data-feather="folder" class="w-12 h-12 mx-auto mb-4"></i>
                    <p>No recordings found</p>
                </div>
            `;
            return;
        }

        container.innerHTML = videos.map(video => `
            <div class="flex items-center justify-between p-4 border border-gray-200 rounded-lg hover:border-primary transition-colors">
                <div class="flex items-center gap-3">
                    <i data-feather="video" class="text-primary"></i>
                    <div>
                        <h3 class="font-semibold text-gray-800">${video}</h3>
                        <p class="text-sm text-gray-500">Click to download</p>
                    </div>
                </div>
                <div class="flex gap-2">
                    <a href="/recording/${video}" 
                       class="bg-primary hover:bg-blue-600 text-white px-4 py-2 rounded-lg text-sm font-medium transition-colors flex items-center gap-1">
                        <i data-feather="download"></i>
                        Download
                    </a>
                    <button onclick="app.deleteRecording('${video}')" 
                            class="bg-red-500 hover:bg-red-600 text-white px-4 py-2 rounded-lg text-sm font-medium transition-colors flex items-center gap-1">
                        <i data-feather="trash-2"></i>
                        Delete
                    </button>
                </div>
            </div>
        `).join('');
        
        feather.replace();
    }

    async deleteRecording(filename) {
        if (!confirm(`Are you sure you want to delete "${filename}"?`)) {
            return;
        }

        try {
            const response = await fetch(`/recording/${filename}`, {
            method: 'DELETE'
        });

            if (response.status === 204) {
                this.showNotification('Recording deleted successfully!', 'success');
                this.loadRecordings();
            } else {
                this.showNotification('Failed to delete recording', 'error');
            }
        } catch (error) {
            console.error('Error deleting recording:', error);
            this.showNotification('Error deleting recording', 'error');
        }
    }

    showNotification(message, type = 'info') {
        // Create notification element
        const notification = document.createElement('div');
        notification.className = `fixed top-4 right-4 z-50 p-4 rounded-lg shadow-lg transform transition-transform duration-300 translate-x-full ${
                type === 'success' ? 'bg-secondary' : 
                type === 'error' ? 'bg-red-500' : 
                'bg-primary'
            } text-white font-medium`;
        notification.textContent = message;

        document.body.appendChild(notification);

        // Animate in
        setTimeout(() => {
            notification.classList.remove('translate-x-full');
        }, 100);

        // Remove after delay
        setTimeout(() => {
            notification.classList.add('translate-x-full');
            setTimeout(() => {
                document.body.removeChild(notification);
            }, 300);
        }, 3000);
    }
}

// Initialize the app when DOM is loaded
document.addEventListener('DOMContentLoaded', () => {
    window.app = new ScreenStreamApp();
});