// GigLez - Upload Functionality

let selectedFiles = [];

// Initialize upload functionality
document.addEventListener('DOMContentLoaded', () => {
    setupDropZone();
    setupFileInput();
});

function setupDropZone() {
    const dropZone = document.getElementById('drop-zone');

    dropZone.addEventListener('click', () => {
        document.getElementById('file-input').click();
    });

    dropZone.addEventListener('dragover', (e) => {
        e.preventDefault();
        dropZone.classList.add('drag-over');
    });

    dropZone.addEventListener('dragleave', () => {
        dropZone.classList.remove('drag-over');
    });

    dropZone.addEventListener('drop', (e) => {
        e.preventDefault();
        dropZone.classList.remove('drag-over');

        const files = Array.from(e.dataTransfer.files).filter(f => f.name.endsWith('.sub'));
        addFiles(files);
    });
}

function setupFileInput() {
    const fileInput = document.getElementById('file-input');

    fileInput.addEventListener('change', (e) => {
        const files = Array.from(e.target.files);
        addFiles(files);
    });
}

function addFiles(files) {
    if (files.length === 0) {
        alert('Please select .sub files');
        return;
    }

    // Add new files
    selectedFiles.push(...files);

    // Show file list
    document.getElementById('file-list').style.display = 'block';

    // Render file list
    renderFileList();
}

function renderFileList() {
    const container = document.getElementById('files-container');

    container.innerHTML = selectedFiles.map((file, index) => `
        <div class="file-item" data-index="${index}">
            <div class="file-info">
                <div class="file-name">${file.name}</div>
                <div class="file-meta">${formatFileSize(file.size)}</div>
            </div>
            <div class="file-actions">
                <button type="button" class="btn btn-secondary" onclick="removeFile(${index})">Remove</button>
            </div>
        </div>
    `).join('');
}

function removeFile(index) {
    selectedFiles.splice(index, 1);

    if (selectedFiles.length === 0) {
        document.getElementById('file-list').style.display = 'none';
    } else {
        renderFileList();
    }
}

function clearFiles() {
    selectedFiles = [];
    document.getElementById('file-list').style.display = 'none';
    document.getElementById('file-input').value = '';
}

async function uploadFiles() {
    if (selectedFiles.length === 0) {
        alert('Please select files to upload');
        return;
    }

    // Validate GPS coordinates
    const lat = parseFloat(document.getElementById('default-lat').value);
    const lon = parseFloat(document.getElementById('default-lon').value);

    if (isNaN(lat) || isNaN(lon)) {
        alert('Please provide valid GPS coordinates');
        return;
    }

    if (lat < -90 || lat > 90 || lon < -180 || lon > 180) {
        alert('GPS coordinates out of range');
        return;
    }

    // Hide file list, show progress
    document.getElementById('file-list').style.display = 'none';
    document.getElementById('upload-progress').style.display = 'block';

    try {
        // Build manifest
        const sessionUuid = document.getElementById('session-uuid').value || generateUUID();
        const accuracy = parseFloat(document.getElementById('default-accuracy').value) || 5.0;
        const altitude = parseFloat(document.getElementById('default-altitude').value) || null;

        const manifest = {
            session_uuid: sessionUuid,
            captures: selectedFiles.map(file => ({
                filename: file.name,
                latitude: lat,
                longitude: lon,
                accuracy: accuracy,
                altitude: altitude,
                timestamp: new Date().toISOString()
            }))
        };

        // Build FormData
        const formData = new FormData();
        formData.append('manifest', JSON.stringify(manifest));

        selectedFiles.forEach(file => {
            formData.append('files', file);
        });

        // Upload
        updateProgress(0, 'Uploading files...');

        const response = await fetch('/api/v1/captures/upload', {
            method: 'POST',
            body: formData
        });

        updateProgress(100, 'Processing...');

        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.detail || 'Upload failed');
        }

        const result = await response.json();

        // Show results
        showUploadResults(result);

    } catch (error) {
        console.error('Upload error:', error);
        alert(`Upload failed: ${error.message}`);

        // Reset
        document.getElementById('upload-progress').style.display = 'none';
        document.getElementById('file-list').style.display = 'block';
    }
}

function updateProgress(percent, text) {
    document.getElementById('progress-fill').style.width = `${percent}%`;
    document.getElementById('progress-text').textContent = text;
}

function showUploadResults(result) {
    // Hide progress
    document.getElementById('upload-progress').style.display = 'none';

    // Show results
    const resultsDiv = document.getElementById('upload-results');
    const container = document.getElementById('results-container');

    resultsDiv.style.display = 'block';

    const successCount = result.successful?.length || 0;
    const errorCount = result.failed?.length || 0;

    let html = `
        <div class="result-summary">
            <p>Successfully uploaded: <strong>${successCount}</strong> files</p>
            ${errorCount > 0 ? `<p>Failed: <strong>${errorCount}</strong> files</p>` : ''}
        </div>
    `;

    if (result.successful && result.successful.length > 0) {
        html += '<h4>Successful Uploads:</h4>';
        result.successful.forEach(item => {
            html += `
                <div class="result-item">
                    <div class="file-name">${item.filename}</div>
                    <div class="file-meta">
                        Frequency: ${(item.frequency / 1e6).toFixed(2)} MHz |
                        Protocol: ${item.protocol || 'RAW'}
                    </div>
                </div>
            `;
        });
    }

    if (result.failed && result.failed.length > 0) {
        html += '<h4>Failed Uploads:</h4>';
        result.failed.forEach(item => {
            html += `
                <div class="result-item error">
                    <div class="file-name">${item.filename}</div>
                    <div class="file-meta">Error: ${item.error}</div>
                </div>
            `;
        });
    }

    container.innerHTML = html;
}

function resetUpload() {
    // Hide results
    document.getElementById('upload-results').style.display = 'none';

    // Clear files
    clearFiles();

    // Reset form
    document.getElementById('default-lat').value = '';
    document.getElementById('default-lon').value = '';
    document.getElementById('session-uuid').value = '';
}

function useCurrentLocation() {
    if (!navigator.geolocation) {
        alert('Geolocation is not supported by your browser');
        return;
    }

    navigator.geolocation.getCurrentPosition(
        (position) => {
            document.getElementById('default-lat').value = position.coords.latitude.toFixed(6);
            document.getElementById('default-lon').value = position.coords.longitude.toFixed(6);
            document.getElementById('default-accuracy').value = position.coords.accuracy.toFixed(1);

            if (position.coords.altitude) {
                document.getElementById('default-altitude').value = position.coords.altitude.toFixed(1);
            }
        },
        (error) => {
            alert(`Geolocation error: ${error.message}`);
        }
    );
}

function generateUUID() {
    return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
        const r = Math.random() * 16 | 0;
        const v = c === 'x' ? r : (r & 0x3 | 0x8);
        return v.toString(16);
    });
}

function formatFileSize(bytes) {
    if (bytes < 1024) return bytes + ' B';
    if (bytes < 1024 * 1024) return (bytes / 1024).toFixed(1) + ' KB';
    return (bytes / (1024 * 1024)).toFixed(1) + ' MB';
}