<?php

/**
 * Send an email or log email details
 *
 * @param string $to Recipient email address
 * @param string $subject Email subject
 * @param string $message Email body
 * @param array $options Optional configuration options
 * @return bool Success status of email sending or logging
 */
function send_email(string $to, string $subject, string $message, array $options = []): bool
{
	// Default configuration
    $config = array_merge([
        'from' => env('admin_email', 'noreply@'.$_SERVER['SERVER_NAME']),
        'log_path' => '../logs/email.log',
        'method' => 'smtp', // 'smtp' or 'log'
        'smtp_host' => env('smtp_host', 'localhost'),
        'smtp_port' => env('smtp_port', 25),
        'smtp_username' => env('smtp_username', null),
        'smtp_password' => env('smtp_password', null),
        'smtp_encryption' => env('smtp_encryption', null)
    ], $options);

	// Always send to log during debug
	if (env('debug', false)) $config['method'] = 'log';

    // Validate input
    if (empty($to) || empty($subject) || empty($message)) {
        error_log('Email sending failed: Missing required parameters');
        return false;
    }

    // Prepare email headers
    $headers = [
        'From: ' . $config['from'],
        'X-Mailer: PHP/' . phpversion()
    ];

    // Choose sending method
    switch ($config['method']) {
        case 'log':
            // Log email details to file
            $logMessage = sprintf(
                "[%s] To: %s, Subject: %s, Message:\n\n %s\n\n\n\n",
                date('Y-m-d H:i:s'),
                $to,
                $subject,
                $message
            );

            // Attempt to log to file
            if (file_put_contents($config['log_path'], $logMessage, FILE_APPEND) === false) {
                error_log('Failed to write to log file: ' . $config['log_path']);
                return false;
            }
            return true;

        case 'smtp':
        default:
            // Attempt to send via SMTP
            try {
                // Prepare SMTP connection
                $smtpConfig = [
                    'host' => $config['smtp_host'],
                    'port' => $config['smtp_port'],
                    'username' => $config['smtp_username'],
                    'password' => $config['smtp_password'],
                    'encryption' => $config['smtp_encryption']
                ];

                // Send email using PHP's mail function (basic SMTP)
                $result = mail(
                    $to,
                    $subject,
                    $message,
                    implode("\r\n", $headers)
                );

                if (!$result) {
                    error_log('SMTP email sending failed');
                    return false;
                }

                return true;
            } catch (Exception $e) {
                error_log('Email sending error: ' . $e->getMessage());
                return false;
            }
    }
}

// Example usage:
// Send via SMTP
// send_email('recipient@example.com', 'Test Subject', 'Email body text');

// Send via log
// send_email('recipient@example.com', 'Test Subject', 'Email body text', ['method' => 'log']);

// Customize SMTP settings
// send_email('recipient@example.com', 'Test Subject', 'Email body text', [
//     'method' => 'smtp',
//     'smtp_host' => 'smtp.yourserver.com',
//     'smtp_port' => 587,
//     'smtp_username' => 'your_username',
//     'smtp_password' => 'your_password',
//     'smtp_encryption' => 'tls'
// ]);