//video.js
let videoBlob = null;
let videoDuration = 0;
let mediaRecorder = null;
let recordedChunks = [];
let currentVideoUrl = null;
const timeline = document.getElementById('timeline');
const trimStart = document.getElementById('trim-start');
const trimEnd = document.getElementById('trim-end');
const videoElement = document.querySelector("#recorded-video");
const downloadBtn = document.querySelector("#download-btn");
const trimBtn = document.querySelector("#trim-btn");

let isDraggingStart = false;
let isDraggingEnd = false;

trimStart.style.left = '0%';
trimEnd.style.left = '100%';

trimBtn.disabled = true;

trimStart.addEventListener('mousedown', startDragStart);
trimEnd.addEventListener('mousedown', startDragEnd);
document.addEventListener('mousemove', drag);
document.addEventListener('mouseup', stopDrag);

function startDragStart(e) {
    isDraggingStart = true;
    e.preventDefault();
}

function startDragEnd(e) {
    isDraggingEnd = true;
    e.preventDefault();
}

function drag(e) {
    if (!isDraggingStart && !isDraggingEnd) return;

    const timelineRect = timeline.getBoundingClientRect();
    let newPosition = ((e.clientX - timelineRect.left) / timelineRect.width) * 100;
    
    newPosition = Math.max(0, Math.min(newPosition, 100));

    if (isDraggingStart) {
        const endPosition = parseFloat(trimEnd.style.left) || 100;
        if (newPosition >= endPosition) return;
        trimStart.style.left = `${newPosition}%`;
        updateVideoTime(newPosition, 'start');
    }
    
    if (isDraggingEnd) {
        const startPosition = parseFloat(trimStart.style.left) || 0;
        if (newPosition <= startPosition) return;
        trimEnd.style.left = `${newPosition}%`;
        updateVideoTime(newPosition, 'end');
    }
}

function updateVideoTime(position, type) {
    if (!videoDuration || !isFinite(videoDuration)) return;
    
    const timeInSeconds = (position / 100) * videoDuration;
    if (isFinite(timeInSeconds) && type === 'start') {
        videoElement.currentTime = timeInSeconds;
    }
}

function stopDrag() {
    isDraggingStart = false;
    isDraggingEnd = false;
}

async function waitForVideoDuration() {
    return new Promise((resolve) => {
        const checkDuration = () => {
            if (videoElement.readyState >= 2 && isFinite(videoElement.duration)) {
                videoDuration = videoElement.duration;
                resolve(videoDuration);
            } else {
                setTimeout(checkDuration, 100);
            }
        };
        checkDuration();
    });
}

async function trimVideo(startTime, endTime) {
    // Validate inputs
    if (!isFinite(startTime) || !isFinite(endTime) || startTime < 0 || endTime <= startTime) {
        throw new Error('Invalid trim times');
    }

    return new Promise((resolve, reject) => {
        const canvas = document.createElement('canvas');
        const ctx = canvas.getContext('2d');
        
        // Set canvas dimensions to match video
        canvas.width = videoElement.videoWidth;
        canvas.height = videoElement.videoHeight;
        
        // Create a new MediaRecorder
        const stream = canvas.captureStream();
        try {
            mediaRecorder = new MediaRecorder(stream, {
                mimeType: 'video/webm;codecs=vp8',
                videoBitsPerSecond: 2500000
            });
        } catch (e) {
            mediaRecorder = new MediaRecorder(stream, {
                mimeType: 'video/webm',
                videoBitsPerSecond: 2500000
            });
        }
        
        recordedChunks = [];
        mediaRecorder.ondataavailable = (e) => {
            if (e.data.size > 0) {
                recordedChunks.push(e.data);
            }
        };
        
        mediaRecorder.onstop = () => {
            const blob = new Blob(recordedChunks, { type: 'video/webm' });
            resolve(blob);
        };
        
        // Start recording
        mediaRecorder.start(100);
        
        // Set video to start time
        videoElement.currentTime = startTime;
        
        const drawFrame = () => {
            if (videoElement.currentTime >= endTime) {
                mediaRecorder.stop();
                return;
            }
            
            ctx.drawImage(videoElement, 0, 0, canvas.width, canvas.height);
            videoElement.currentTime += 1/30;
            requestAnimationFrame(drawFrame);
        };
        
        videoElement.onseeked = () => {
            if (Math.abs(videoElement.currentTime - startTime) < 0.1) {
                drawFrame();
                videoElement.onseeked = null;
            }
        };
    });
}

async function playVideo(message) {
    const url = message?.videoUrl || message?.base64;
    if (!url) {
        console.error('No video URL provided');
        return;
    }

    try {
        // Clean up previous video if it exists
        if (currentVideoUrl) {
            URL.revokeObjectURL(currentVideoUrl);
            currentVideoUrl = null;
        }

        // Reset video element
        videoElement.pause();
        videoElement.currentTime = 0;
        videoElement.src = '';

        // Clear previous video data
        videoBlob = null;
        videoDuration = 0;
        
        // Load new video blob
        const response = await fetch(url);
        videoBlob = await response.blob();
        
        // Create and store new object URL
        currentVideoUrl = URL.createObjectURL(videoBlob);
        videoElement.src = currentVideoUrl;
        
        // Wait for video metadata and duration
        await waitForVideoDuration();
        console.log('Video duration:', videoDuration);
        
        // Reset trim handles
        trimStart.style.left = '0%';
        trimEnd.style.left = '100%';
        
        // Enable trim button
        trimBtn.disabled = false;

        // Clear any stored video URL
        if (chrome?.storage?.local) {
            chrome.storage.local.remove("videoUrl");
        }

        // Store new video URL
        if (url !== currentVideoUrl) {
            saveVideo(url);
        }
        
    } catch (error) {
        console.error('Error loading video:', error);
        // Clean up on error
        if (currentVideoUrl) {
            URL.revokeObjectURL(currentVideoUrl);
            currentVideoUrl = null;
        }
        return;
    }

    // Update download functionality
    // Update download functionality
downloadBtn.onclick = () => {
    if (videoBlob) {
        try {
            // Create a download link
            const a = document.createElement('a');
            a.href = currentVideoUrl;
            // Set a default filename with timestamp
            const timestamp = new Date().toISOString().replace(/[:.]/g, '-');
            a.download = `recorded_video_${timestamp}.webm`;
            // Make sure the link is hidden
            a.style.display = 'none';
            // Add to document, click it, and remove it
            document.body.appendChild(a);
            a.click();
            // Small timeout before removing the element
            setTimeout(() => {
                document.body.removeChild(a);
            }, 100);
        } catch (error) {
            console.error('Download error:', error);
            alert('Error downloading video. Please try again.');
        }
    } else {
        alert('No video available to download');
    }
};

    // Update trim functionality
    trimBtn.onclick = async () => {
        if (!videoBlob || !videoDuration) {
            console.error('Video not properly loaded');
            return;
        }

        try {
            const startPercent = parseFloat(trimStart.style.left) || 0;
            const endPercent = parseFloat(trimEnd.style.left) || 100;

            const startTime = (startPercent / 100) * videoDuration;
            const endTime = (endPercent / 100) * videoDuration;

            if (!isFinite(startTime) || !isFinite(endTime)) {
                throw new Error('Invalid trim times calculated');
            }

            console.log(`Trimming video from ${startTime}s to ${endTime}s`);
            
            trimBtn.disabled = true;
            trimBtn.textContent = 'Trimming...';
            
            const trimmedBlob = await trimVideo(startTime, endTime);
            
            // Clean up previous video
            if (currentVideoUrl) {
                URL.revokeObjectURL(currentVideoUrl);
            }
            
            // Set up new video
            videoBlob = trimmedBlob;
            currentVideoUrl = URL.createObjectURL(trimmedBlob);
            videoElement.src = currentVideoUrl;
            
            console.log('Video trimmed successfully');
        } catch (error) {
            console.error('Error trimming video:', error.message);
        } finally {
            trimBtn.disabled = false;
            trimBtn.textContent = 'Trim Video';
        }
    };
}

// Storage and message handling
const saveVideo = (videoUrl) => {
    if (chrome?.storage?.local) {
        chrome.storage.local.set({ videoUrl }, () => {
            if (chrome.runtime.lastError) {
                console.error('Error saving video URL:', chrome.runtime.lastError);
            }
        });
    }
};


// Listen for stored video on load
if (chrome?.storage?.local) {
    chrome.storage.local.get(["videoUrl"], (result) => {
        if (result.videoUrl) {
            playVideo(result);
        }
    });
}

// Listen for messages from service worker
if (chrome?.runtime?.onMessage) {
    chrome.runtime.onMessage.addListener((message) => {
        switch (message.type) {
            case "play-video":
                playVideo(message);
                break;
            default:
                console.log("Unknown message type");
        }
    });
}
window.addEventListener('unload', () => {
    if (currentVideoUrl) {
        URL.revokeObjectURL(currentVideoUrl);
    }
});
// Add these variables at the top of video.js
// Add these variables at the top of video.js
let embedCode = '';
 // Make sure this is defined

// Function to generate embed code
function generateEmbedCode(videoUrl) {
    const embedWidth = 640;
    const embedHeight = 360;
    return `<iframe width="${embedWidth}" height="${embedHeight}" src="${videoUrl}" frameborder="0" allowfullscreen></iframe>`;
}

// Function to show embed modal
function showEmbedModal() {
    const embedModal = document.getElementById('embed-modal');
    const embedCodeTextarea = document.getElementById('embed-code');
    const copyEmbedBtn = document.getElementById('copy-embed');
    const closeEmbedModalBtn = document.getElementById('close-embed-modal');

    if (videoBlob) {
        const videoUrl = URL.createObjectURL(videoBlob);
        embedCode = generateEmbedCode(videoUrl);
        embedCodeTextarea.value = embedCode;
        embedModal.style.display = 'flex';

        // Copy button functionality
        copyEmbedBtn.onclick = () => {
            embedCodeTextarea.select();
            document.execCommand('copy');
            copyEmbedBtn.innerHTML = '<i class="fas fa-check"></i> Copied!';
            setTimeout(() => {
                copyEmbedBtn.innerHTML = '<i class="fas fa-copy"></i> Copy Code';
            }, 2000);
        };

        // Close button functionality
        closeEmbedModalBtn.onclick = () => {
            embedModal.style.display = 'none';
        };

        // Close modal when clicking outside
        window.onclick = (event) => {
            if (event.target === embedModal) {
                embedModal.style.display = 'none';
            }
        };
    }
}

// Add embed button to controls
function addEmbedButton() {
    const controlsContainer = document.getElementById('controls');
    const embedBtn = document.createElement('button');
    embedBtn.className = 'btn';
    embedBtn.innerHTML = '<i class="fas fa-code"></i> Get Embed Code';
    embedBtn.onclick = showEmbedModal;
    controlsContainer.appendChild(embedBtn);
}

// Initialize embed functionality
document.addEventListener('DOMContentLoaded', () => {
    addEmbedButton();
});

// Additional CSS to add to your existing styles
const additionalStyles = `
.modal {
    animation: fadeIn 0.3s ease-in-out;
}

.modal-content {
    animation: slideIn 0.3s ease-in-out;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

#embed-code {
    background: #f8f9fa;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    resize: none;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 15px;
    margin: 15px 0;
    transition: border-color 0.3s ease;
}

#embed-code:focus {
    outline: none;
    border-color: #5d3fbd;
}

.modal-buttons .btn {
    min-width: 120px;
    justify-content: center;
}

.modal-buttons .btn i {
    margin-right: 8px;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

#copy-embed:not(:hover) i {
    transition: transform 0.3s ease;
}

#copy-embed:hover i {
    transform: translateY(-2px);
}
`;