<?php
// This script is designed to be run from the command line by a cron job.
// e.g., 0 1 * * * /usr/bin/php /path/to/your/project/cron/process_passive_income.php

require_once dirname(__DIR__) . '/db/config.php';

echo "Starting passive income processing...\n";

$db = db();
$db->beginTransaction();

try {
    // 1. Find pending payments
    $stmt = $db->prepare("SELECT * FROM passive_income_schedule WHERE status = 'pending' AND payment_date <= CURDATE()");
    $stmt->execute();
    $pending_payments = $stmt->fetchAll(PDO::FETCH_ASSOC);

    if (empty($pending_payments)) {
        echo "No pending passive income payments to process.\n";
        $db->commit();
        exit;
    }

    echo "Found " . count($pending_payments) . " pending payment(s).\n";

    foreach ($pending_payments as $payment) {
        $userId = $payment['user_id'];
        $amount = $payment['amount'];
        $scheduleId = $payment['id'];

        // 2. Insert into transactions
        $trans_stmt = $db->prepare(
            "INSERT INTO transactions (user_id, amount, type, description, related_user_id) VALUES (:user_id, :amount, 'passive_income', :description, NULL)"
        );
        $trans_stmt->execute([
            ':user_id' => $userId,
            ':amount' => $amount,
            ':description' => 'Monthly passive income payment from schedule #' . $scheduleId
        ]);

        // 3. Update user's wallet
        $user_stmt = $db->prepare("UPDATE users SET wallet_balance = wallet_balance + :amount, total_passive_income = total_passive_income + :amount WHERE id = :user_id");
        $user_stmt->execute([':amount' => $amount, ':user_id' => $userId]);

        // 4. Update schedule status to 'paid'
        $schedule_stmt = $db->prepare("UPDATE passive_income_schedule SET status = 'paid' WHERE id = :id");
        $schedule_stmt->execute([':id' => $scheduleId]);

        echo "Processed payment for user #$userId (Amount: $amount).\n";
    }

    $db->commit();
    echo "Passive income processing finished successfully.\n";

} catch (Exception $e) {
    $db->rollBack();
    echo "Error processing passive income: " . $e->getMessage() . "\n";
    // It's crucial to log this error to a file in a real-world scenario
    error_log("Passive Income Cron Failed: " . $e->getMessage());
}