<?php
require_once 'db/config.php';

if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['id'])) {
    $id = filter_var($_POST['id'], FILTER_SANITIZE_NUMBER_INT);

    try {
        $pdo = db();
        $pdo->beginTransaction();

        // Delete associated steps first
        $stmtSteps = $pdo->prepare("DELETE FROM process_steps WHERE process_id = :id");
        $stmtSteps->bindParam(':id', $id, PDO::PARAM_INT);
        $stmtSteps->execute();

        // Then delete the process
        $stmtProcess = $pdo->prepare("DELETE FROM processes WHERE id = :id");
        $stmtProcess->bindParam(':id', $id, PDO::PARAM_INT);
        if ($stmtProcess->execute()) {
            $pdo->commit();
            header('Location: index.php?success=processdeleted');
            exit();
        } else {
            $pdo->rollBack();
            header('Location: index.php?error=deletionfailed');
            exit();
        }
    } catch (PDOException $e) {
        $pdo->rollBack();
        error_log("DB Error: " . $e->getMessage());
        header('Location: index.php?error=dberror');
        exit();
    }
} else {
    header('Location: index.php?error=invalidrequest');
    exit();
}
?>