<?php
/**
 * Initial authentication script for Zoho OAuth2
 * 
 * Step 1: Run this script to get the authorization URL
 * Step 2: Visit the URL and authorize the application
 * Step 3: Copy the authorization code from the redirect URL
 * Step 4: Run: php scripts/authenticate.php --code=YOUR_CODE
 */

declare(strict_types=1);

// Autoloader
spl_autoload_register(function ($class) {
    $prefix = 'App\\';
    $baseDir = __DIR__ . '/../src/';
    
    $len = strlen($prefix);
    if (strncmp($prefix, $class, $len) !== 0) {
        return;
    }
    
    $relativeClass = substr($class, $len);
    $file = $baseDir . str_replace('\\', '/', $relativeClass) . '.php';
    
    if (file_exists($file)) {
        require $file;
    }
});

use App\Core\ZohoClient;

// Load configuration
$config = require __DIR__ . '/../config/config.php';

// Parse command line options
$options = getopt('', ['service:', 'code:', 'help']);

$service = $options['service'] ?? 'projects';
$help = isset($options['help']);

if ($help) {
    echo "Zoho OAuth2 Authentication Script\n";
    echo "=================================\n\n";
    echo "Usage:\n";
    echo "  1. Generate authorization URL:\n";
    echo "     php scripts/authenticate.php --service=projects\n\n";
    echo "  2. Visit the URL, authorize, and copy the code from redirect URL\n\n";
    echo "  3. Exchange code for tokens:\n";
    echo "     php scripts/authenticate.php --service=projects --code=YOUR_CODE\n\n";
    echo "Options:\n";
    echo "  --service  Zoho service (projects, desk)\n";
    echo "  --code     Authorization code from OAuth flow\n";
    echo "  --help     Show this help message\n";
    exit(0);
}

$client = new ZohoClient($config);

if (isset($options['code'])) {
    // Exchange authorization code for tokens
    $code = $options['code'];
    
    echo "Exchanging authorization code for tokens...\n";
    
    try {
        $client->exchangeCodeForTokens($code, $service);
        echo "Success! Tokens have been saved.\n";
        echo "You can now run the export script.\n";
    } catch (\Exception $e) {
        echo "Error: " . $e->getMessage() . "\n";
        exit(1);
    }
} else {
    // Generate authorization URL
    try {
        $authUrl = $client->getAuthorizationUrl($service);
        echo "Authorization URL for Zoho {$service}:\n";
        echo "========================================\n";
        echo "{$authUrl}\n\n";
        echo "1. Visit this URL in your browser\n";
        echo "2. Authorize the application\n";
        echo "3. Copy the 'code' parameter from the redirect URL\n";
        echo "4. Run: php scripts/authenticate.php --service={$service} --code=YOUR_CODE\n";
    } catch (\Exception $e) {
        echo "Error: " . $e->getMessage() . "\n";
        exit(1);
    }
}