<?php
header('Content-Type: application/json');

$response = [];

// The directory where recordings will be stored.
$uploadDir = 'uploads/';

// Ensure the upload directory exists and is writable.
if (!is_dir($uploadDir)) {
    if (!mkdir($uploadDir, 0775, true)) {
        $response = ['success' => false, 'message' => 'Failed to create upload directory.'];
        echo json_encode($response);
        exit;
    }
}

// Get the raw POST data.
$audioData = file_get_contents('php://input');

if ($audioData) {
    // Generate a unique filename.
    $fileName = 'recording_' . date('Y-m-d_H-i-s') . '_' . uniqid() . '.wav';
    $filePath = $uploadDir . $fileName;

    // Save the file.
    if (file_put_contents($filePath, $audioData)) {
        $response['success'] = true;
        $response['message'] = 'Audio saved successfully.';
        $response['file_path'] = $filePath;
    } else {
        $response['success'] = false;
        $response['message'] = 'Error saving audio file. Check directory permissions.';
    }
} else {
    $response['success'] = false;
    $response['message'] = 'No audio data received.';
}

echo json_encode($response);
?>