from backend.models.workflow_schema import ALLOWED_ACTIONS, ALLOWED_TRIGGERS


def validate_workflow(workflow: dict) -> None:
    trigger_type = workflow["trigger"]["type"]
    if trigger_type not in ALLOWED_TRIGGERS:
        raise ValueError(f"Unsupported trigger: {trigger_type}")
    step_ids = set()
    for step in workflow["steps"]:
        if step["id"] in step_ids:
            raise ValueError(f"Duplicate step id: {step['id']}")
        step_ids.add(step["id"])
        if step["action"] not in ALLOWED_ACTIONS:
            raise ValueError(f"Unsupported action: {step['action']}")