import re

with open('WorkflowEngine.php', 'r') as f:
    content = f.read()

new_method = """
    public function createNewInstance(int $personId, int $processDefinitionId, int $userId, array $context = []): array {
        if (!is_int($processDefinitionId) || $processDefinitionId <= 0) {
            throw new InvalidArgumentException("processDefinitionId must be a positive integer.");
        }
        if (!is_int($personId) || $personId <= 0) {
            throw new InvalidArgumentException("personId must be a positive integer.");
        }

        $stmt_def = $this->pdo->prepare("SELECT definition_json, code, is_active FROM process_definitions WHERE id = ?");
        $stmt_def->execute([$processDefinitionId]);
        $definition = $stmt_def->fetch(PDO::FETCH_ASSOC);

        if (!$definition) {
            throw new WorkflowNotFoundException("Process definition #$processDefinitionId not found.");
        }

        if (empty($definition['is_active'])) {
            throw new WorkflowNotAllowedException("Process is not active and cannot be started.");
        }

        $eligibility = $this->checkEligibility($personId, $processDefinitionId, $context);
        if (!$eligibility['is_eligible']) {
            throw new WorkflowEligibilityException("Person is not eligible to start this process.", $eligibility['reasons']);
        }

        $definition_json = !empty($definition['definition_json']) ? json_decode($definition['definition_json'], true) : [];
        $start_node = $definition_json['start_node_id'] ?? 'start';
        $initial_data_map = $definition_json['initial_data'] ?? [];
        $data_json = !empty($initial_data_map) ? json_encode($initial_data_map) : null;

        $stmt = $this->pdo->prepare(
            "INSERT INTO process_instances (person_id, process_definition_id, current_node_id, current_status, data_json, last_activity_at) VALUES (?, ?, ?, 'in_progress', ?, NOW())"
        );
        $stmt->execute([$personId, $processDefinitionId, $start_node, $data_json]);
        $newInstanceId = $this->pdo->lastInsertId();

        $this->logEvent($newInstanceId, 'process_started', 'Process started', $start_node, ['context' => $context], $userId);

        $stmt = $this->pdo->prepare("SELECT * FROM process_instances WHERE id = ?");
        $stmt->execute([$newInstanceId]);
        return $stmt->fetch(PDO::FETCH_ASSOC);
    }
"

content = content.replace(
    'public function getOrCreateInstanceByDefId(int $personId, int $processDefinitionId, int $userId, array $context = []): ?array {',
    new_method + '\n    public function getOrCreateInstanceByDefId(int $personId, int $processDefinitionId, int $userId, array $context = []): ?array {'
)

with open('WorkflowEngine.php', 'w') as f:
    f.write(content)

print("Patched.")