<?php
require_once 'includes/helpers.php';
$user = getCurrentAppUser();
$company_id = get_current_company_id();
$job_id = $_GET['id'] ?? null;

if (!$job_id || !$user || !$company_id) {
    header("Location: index.php");
    exit;
}

// Fetch Job
$stmt = db()->prepare("SELECT j.*, s.name as status_name, c.name as client_name 
                      FROM jobs j 
                      LEFT JOIN job_statuses s ON j.status_id = s.id 
                      LEFT JOIN clients c ON j.client_id = c.id 
                      WHERE j.id = ? AND j.company_id = ?");
$stmt->execute([$job_id, $company_id]);
$job = $stmt->fetch(PDO::FETCH_ASSOC);

if (!$job) {
    die("Job not found.");
}

// Ensure all required folders for this company are created for this job
ensureRequiredJobFoldersExist($job_id, $company_id);

// Handle POST requests for File & Folder Management
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $action = $_POST['action'] ?? '';

    if ($action === 'toggle_approved') {
        $new_val = $job['works_approved'] ? 0 : 1;
        $stmt = db()->prepare("UPDATE jobs SET works_approved = ? WHERE id = ?");
        $stmt->execute([$new_val, $job_id]);
        
        logActivity($job_id, 'works_approved_toggle', 'works_approved', $job['works_approved'] ? 'True' : 'False', $new_val ? 'True' : 'False');
        
        header("Location: job_detail.php?id=" . $job_id);
        exit;
    } elseif ($action === 'add_folder') {
        $folder_name = trim($_POST['folder_name'] ?? '');
        if (!empty($folder_name)) {
            $result = createJobFolder($job_id, $company_id, $folder_name, TRUE);
            if ($result['success']) {
                // Log activity (already handled inside createJobFolder via ensureRequiredJobFoldersExist)
                header("Location: job_detail.php?id=" . $job_id . "&message=Folder '" . urlencode($folder_name) . "' created successfully.&message_type=success");
                exit;
            } else {
                $error = $result['message'] ?? 'Failed to create folder.';
            }
        } else {
            $error = 'Folder name cannot be empty.';
        }
    } elseif ($action === 'delete_folder') {
        $job_job_folder_id = (int)$_POST['job_job_folder_id'];
        $result = deleteJobFolder($job_job_folder_id, $job_id, $company_id);
        if ($result['success']) {
            header("Location: job_detail.php?id=" . $job_id . "&message=Folder deleted successfully.&message_type=success");
            exit;
        } else {
            $error = $result['message'] ?? 'Failed to delete folder.';
        }
    } elseif ($action === 'upload_file') {
        $job_job_folder_id = (int)$_POST['job_job_folder_id'];
        if (isset($_FILES['file_upload']) && $_FILES['file_upload']['error'] === UPLOAD_ERR_OK) {
            $file_tmp_path = $_FILES['file_upload']['tmp_name'];
            $file_name = basename($_FILES['file_upload']['name']);
            $file_size = $_FILES['file_upload']['size'];
            $file_type = $_FILES['file_upload']['type'];

            // Define upload directory: uploads/company_id/job_id/job_job_folder_id/
            $upload_dir = __DIR__ . "/uploads/{$company_id}/{$job_id}/{$job_job_folder_id}/";
            if (!is_dir($upload_dir)) {
                mkdir($upload_dir, 0775, true);
            }

            $dest_path = $upload_dir . $file_name;
            if (move_uploaded_file($file_tmp_path, $dest_path)) {
                $result = addJobFile($job_id, $job_job_folder_id, $company_id, $user['id'], $file_name, $dest_path, $file_type, $file_size);
                if ($result['success']) {
                    header("Location: job_detail.php?id=" . $job_id . "&message=File '" . urlencode($file_name) . "' uploaded successfully.&message_type=success");
                    exit;
                } else {
                    // If DB insert fails, try to remove the uploaded file
                    if (file_exists($dest_path)) { unlink($dest_path); }
                    $error = 'Failed to record file in database.';
                }
            } else {
                $error = 'Failed to move uploaded file.';
            }
        } else {
            $error = 'File upload error or no file selected.';
        }
    } elseif ($action === 'delete_file') {
        $file_id = (int)$_POST['file_id'];
        $result = deleteJobFile($file_id, $job_id, $company_id);
        if ($result['success']) {
            header("Location: job_detail.php?id=" . $job_id . "&message=File deleted successfully.&message_type=success");
            exit;
        } else {
            $error = $result['message'] ?? 'Failed to delete file.';
        }
    }
}

// Fetch Logs
$logStmt = db()->prepare("SELECT * FROM activity_logs WHERE job_id = ? ORDER BY created_at DESC");
$logStmt->execute([$job_id]);
$logs = $logStmt->fetchAll(PDO::FETCH_ASSOC);

// Fetch all job folders (required and custom)
$jobFolders = getJobFolders($job_id, $company_id);

// Get messages from URL for display
$message = $_GET['message'] ?? '';
$message_type = $_GET['message_type'] ?? '';

?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Job Detail - <?php echo htmlspecialchars($job['job_ref']); ?></title>
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap" rel="stylesheet">
    <link rel="stylesheet" href="assets/css/custom.css">
    <style>
        .folder-item { 
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 15px;
            border: 1px solid #E5E7EB;
            border-radius: 4px;
            margin-bottom: 8px;
            background-color: #F9FAFB;
        }
        .folder-item.required { background-color: #FFFBEB; border-color: #FCD34D; }
        .folder-item .folder-name {
            font-weight: 500;
            color: #111827;
        }
        .folder-item .folder-actions button {
            margin-left: 8px;
        }
        .message { padding: 15px; border-radius: 4px; margin-bottom: 20px; }
        .message.success { background-color: #D1FAE5; color: #065F46; border: 1px solid #34D399; }
        .message.error { background-color: #FEE2E2; color: #991B1B; border: 1px solid #F87171; }
    </style>
</head>
<body>
    <nav class="navbar navbar-expand-lg py-3">
        <div class="container">
            <a class="navbar-brand fw-bold" href="index.php">Repairs Pro</a>
            <div class="d-flex align-items-center">
                <a href="index.php" class="btn btn-light btn-sm me-2">Back to Dashboard</a>
            </div>
        </div>
    </nav>

    <main class="container py-5">

        <?php if ($message): ?>
            <div class="message <?php echo $message_type; ?>">
                <?php echo htmlspecialchars($message); ?>
            </div>
        <?php endif; ?>

        <?php if (isset($error)): ?>
            <div class="alert alert-danger"><?php echo $error; ?></div>
        <?php endif; ?>

        <div class="row">
            <div class="col-lg-8">
                <div class="card p-4 mb-4">
                    <div class="d-flex justify-content-between align-items-start mb-4">
                        <div>
                            <span class="text-secondary text-uppercase small fw-bold">Job Reference</span>
                            <h1 class="h3 fw-bold"><?php echo htmlspecialchars($job['job_ref']); ?></h1>
                        </div>
                        <div class="text-end">
                            <span class="badge bg-light text-dark border p-2 px-3"><?php echo htmlspecialchars($job['status_name']); ?></span>
                        </div>
                    </div>

                    <div class="row g-4">
                        <div class="col-md-6">
                            <label class="text-secondary small">Client</label>
                            <div class="fw-medium"><?php echo htmlspecialchars($job['client_name']); ?></div>
                        </div>
                        <div class="col-md-6">
                            <label class="text-secondary small">Created At</label>
                            <div class="fw-medium"><?php echo date('d M Y, H:i', strtotime($job['created_at'])); ?></div>
                        </div>
                        <div class="col-12">
                            <label class="text-secondary small">Address</label>
                            <div class="fw-medium"><?php echo htmlspecialchars($job['address_1'] ?: 'N/A'); ?></div>
                        </div>
                        <div class="col-12">
                            <label class="text-secondary small">Description</label>
                            <div class="p-3 bg-light border-start border-primary border-4 rounded-1">
                                <?php echo nl2br(htmlspecialchars($job['description'] ?: 'No description provided.')); ?>
                            </div>
                        </div>
                    </div>

                    <hr class="my-4">

                    <div class="d-flex justify-content-between align-items-center mb-4">
                        <div>
                            <h5 class="m-0 fw-bold">Works Approved</h5>
                            <p class="text-secondary small m-0">Toggle this when the scope of work is confirmed.</p>
                        </div>
                        <form method="POST">
                            <input type="hidden" name="action" value="toggle_approved">
                            <button type="submit" class="btn <?php echo $job['works_approved'] ? 'btn-success' : 'btn-outline-secondary'; ?>">
                                <?php echo $job['works_approved'] ? 'Approved' : 'Mark as Approved'; ?>
                            </button>
                        </form>
                    </div>

                    <hr class="my-4">

                    <!-- Job Folders Section -->
                    <div class="d-flex justify-content-between align-items-center mb-3">
                        <h5 class="m-0 fw-bold">Job Folders</h5>
                        <button type="button" class="btn btn-primary btn-sm" data-bs-toggle="modal" data-bs-target="#addFolderModal">Add Custom Folder</button>
                    </div>

                    <div class="folder-list">
                        <?php if (!empty($jobFolders)): ?>
                            <?php foreach ($jobFolders as $folder): ?>
                                <div class="folder-item <?php echo !$folder['is_custom'] ? 'required' : ''; ?>">
                                    <span class="folder-name">
                                        <?php echo htmlspecialchars($folder['name']); ?> 
                                        (<?php echo $folder['file_count']; ?> files)
                                        <?php if (!$folder['is_custom']): ?>
                                            <span class="badge bg-warning text-dark ms-2">Required</span>
                                        <?php endif; ?>
                                    </span>
                                    <div class="folder-actions">
                                        <button type="button" class="btn btn-sm btn-outline-secondary" data-bs-toggle="modal" data-bs-target="#uploadFileModal" data-job-job-folder-id="<?php echo $folder['id']; ?>" data-folder-name="<?php echo htmlspecialchars($folder['name']); ?>">Upload File</button>
                                        <?php if ($folder['is_custom']): ?>
                                            <form method="POST" class="d-inline-block" onsubmit="return confirm('Are you sure you want to delete this folder? This action cannot be undone.');">
                                                <input type="hidden" name="action" value="delete_folder">
                                                <input type="hidden" name="job_job_folder_id" value="<?php echo $folder['id']; ?>">
                                                <button type="submit" class="btn btn-sm btn-outline-danger" <?php echo ($folder['file_count'] > 0) ? 'disabled title="Folder must be empty to delete"' : ''; ?>>Delete</button>
                                            </form>
                                        <?php endif; ?>
                                    </div>
                                </div>
                                <!-- Display Files within this folder -->
                                <div class="files-list ms-4 mb-3">
                                    <?php $files = getFilesInJobFolder($folder['id'], $company_id); ?>
                                    <?php if (!empty($files)): ?>
                                        <?php foreach ($files as $file): ?>
                                            <div class="d-flex justify-content-between align-items-center mb-1 ps-2 py-1 border-start border-secondary">
                                                <span><a href="<?php echo htmlspecialchars($file['filepath']); ?>" target="_blank"><?php echo htmlspecialchars($file['filename']); ?></a> (<?php echo round($file['size'] / 1024, 2); ?> KB)</span>
                                                <form method="POST" class="d-inline-block" onsubmit="return confirm('Are you sure you want to delete this file? This action cannot be undone.');">
                                                    <input type="hidden" name="action" value="delete_file">
                                                    <input type="hidden" name="file_id" value="<?php echo $file['id']; ?>">
                                                    <button type="submit" class="btn btn-sm btn-outline-danger">Delete File</button>
                                                </form>
                                            </div>
                                        <?php endforeach; ?>
                                    <?php else: ?>
                                        <div class="text-muted small ms-2">No files in this folder.</div>
                                    <?php endif; ?>
                                </div>
                            <?php endforeach; ?>
                        <?php else: ?>
                            <div class="alert alert-info">No folders set up for this job yet.</div>
                        <?php endif; ?>
                    </div>

                </div>
            </div>

            <div class="col-lg-4">
                <div class="card">
                    <div class="card-header bg-white py-3">
                        <h5 class="m-0 fw-bold">Activity Log</h5>
                    </div>
                    <div class="activity-log">
                        <?php foreach ($logs as $log): ?>
                        <div class="log-entry">
                            <div class="d-flex justify-content-between mb-1">
                                <span class="fw-bold"><?php echo htmlspecialchars($log['user_name']); ?></span>
                                <span class="text-secondary x-small"><?php echo date('H:i', strtotime($log['created_at'])); ?></span>
                            </div>
                            <div class="text-primary small mb-1">
                                <?php 
                                    switch($log['event_type']) {
                                        case 'job_created': echo "Created the job"; break;
                                        case 'works_approved_toggle': echo "Updated 'Works Approved' status"; break;
                                        case 'folder_deleted': echo "Deleted folder: ". htmlspecialchars($log['old_value']); break;
                                        case 'file_uploaded': echo "Uploaded file: ". htmlspecialchars($log['new_value']); break;
                                        case 'file_deleted': echo "Deleted file: ". htmlspecialchars($log['old_value']); break;
                                        default: echo htmlspecialchars($log['event_type']);
                                    }
                                ?>
                            </div>
                            <?php if ($log['field_name']): ?>
                                <div class="text-secondary" style="font-size: 0.75rem;">
                                    <?php if ($log['old_value'] !== null): ?>
                                        <span class="text-decoration-line-through"><?php echo htmlspecialchars($log['old_value']); ?></span>
                                        &rarr; 
                                    <?php endif; ?>
                                    <span class="fw-medium"><?php echo htmlspecialchars($log['new_value']); ?></span>
                                </div>
                            <?php endif; ?>
                            <div class="text-muted mt-1" style="font-size: 0.7rem;">
                                <?php echo date('d M Y', strtotime($log['created_at'])); ?>
                            </div>
                        </div>
                        <?php endforeach; if (empty($logs)): ?>
                        <div class="p-4 text-center text-secondary">No activity yet.</div>
                        <?php endif; ?>
                    </div>
                </div>
            </div>
        </div>
    </main>

    <!-- Modals -->
    <!-- Add Folder Modal -->
    <div class="modal fade" id="addFolderModal" tabindex="-1" aria-labelledby="addFolderModalLabel" aria-hidden="true">
        <div class="modal-dialog">
            <form class="modal-content" method="POST">
                <input type="hidden" name="action" value="add_folder">
                <div class="modal-header">
                    <h5 class="modal-title" id="addFolderModalLabel">Add Custom Folder</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
                </div>
                <div class="modal-body">
                    <div class="mb-3">
                        <label for="folderName" class="form-label">Folder Name</label>
                        <input type="text" class="form-control" id="folderName" name="folder_name" required>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-light" data-bs-dismiss="modal">Cancel</button>
                    <button type="submit" class="btn btn-primary">Create Folder</button>
                </div>
            </form>
        </div>
    </div>

    <!-- Upload File Modal -->
    <div class="modal fade" id="uploadFileModal" tabindex="-1" aria-labelledby="uploadFileModalLabel" aria-hidden="true">
        <div class="modal-dialog">
            <form class="modal-content" method="POST" enctype="multipart/form-data">
                <input type="hidden" name="action" value="upload_file">
                <input type="hidden" name="job_job_folder_id" id="uploadFolderId">
                <div class="modal-header">
                    <h5 class="modal-title" id="uploadFileModalLabel">Upload File to <span id="uploadFolderName"></span></h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
                </div>
                <div class="modal-body">
                    <div class="mb-3">
                        <label for="fileUpload" class="form-label">Select File</label>
                        <input type="file" class="form-control" id="fileUpload" name="file_upload" required>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-light" data-bs-dismiss="modal">Cancel</button>
                    <button type="submit" class="btn btn-primary">Upload</button>
                </div>
            </form>
        </div>
    </div>

    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
    <script>
        // Populate folder ID and name in upload file modal
        var uploadFileModal = document.getElementById('uploadFileModal');
        uploadFileModal.addEventListener('show.bs.modal', function (event) {
            var button = event.relatedTarget;
            var jobJobFolderId = button.getAttribute('data-job-job-folder-id');
            var folderName = button.getAttribute('data-folder-name');
            
            var modalFolderIdInput = uploadFileModal.querySelector('#uploadFolderId');
            var modalFolderNameSpan = uploadFileModal.querySelector('#uploadFolderName');
            
            modalFolderIdInput.value = jobJobFolderId;
            modalFolderNameSpan.textContent = folderName;
        });
    </script>
</body>
</html>