from __future__ import annotations

NO_ROLLBACK_ACTIONS = {
    'container.clear_logs',
    'container.stop',
    'gateway.clear_cache',
    'unraid.mover.start',
    'volume.delete',
}


def build_preflight(action: str, target: str, policy_decision: str, risk: str):
    dependencies = ['connector']
    if action.startswith('container.'):
        dependencies.append('container runtime')
    if action.startswith('sonarr.') or action.startswith('radarr.'):
        dependencies.append('media indexer api')

    return {
        'action': action,
        'target': target,
        'risk': risk,
        'policyDecision': policy_decision,
        'affectedApps': [target],
        'dependencies': dependencies,
        'preChecks': ['policy evaluate', 'connector config', 'maintenance status'],
        'postChecks': ['connector state', 'service availability', 'policy audit'],
        'rollbackAvailable': action not in NO_ROLLBACK_ACTIONS,
        'auditPreview': f'Action {action} on {target} is prepared for execution review.',
    }