import click
import time
from functools import wraps
from security.rbac_engine import RBACEngine
from security.audit import SecureAudit
from typing import Optional

rbac = RBACEngine()

def timed_command(func):
    @wraps(func)
    def wrapper(*args, **kwargs):
        start_time = time.time()
        result = func(*args, **kwargs)
        execution_time = time.time() - start_time
        kwargs['audit_logger'].log_performance(
            command=func.__name__,
            execution_time=execution_time
        )
        return result
    return wrapper

class CLICommand:
    def __init__(self, audit_logger: SecureAudit):
        self.audit_logger = audit_logger

    @click.command()
    @click.option('--task-id', required=True, help='Task ID to add')
    @click.option('--user', required=True, help='User adding task')
    @timed_command
    def add_task(self, task_id: str, user: str):
        """Add a new task with RBAC validation"""
        self.audit_logger.log_attempt(
            command='add_task',
            user=user,
            params={'task_id': task_id}
        )
        
        if not rbac.validate_permission(user, 'task_add'):
            self.audit_logger.log_denial(
                command='add_task',
                user=user,
                reason='RBAC validation failed'
            )
            click.echo("Permission denied")
            return
        
        # Implementation would go here
        click.echo(f"Added task {task_id}")
        self.audit_logger.log_success(
            command='add_task',
            user=user,
            result={'task_id': task_id}
        )

    @click.command()
    @click.option('--user', required=True, help='User requesting task')
    @timed_command
    def get_next_task(self, user: str):
        """Get next available task with RBAC validation"""
        self.audit_logger.log_attempt(
            command='get_next_task',
            user=user
        )
        
        if not rbac.validate_permission(user, 'task_read'):
            self.audit_logger.log_denial(
                command='get_next_task',
                user=user,
                reason='RBAC validation failed'
            )
            click.echo("Permission denied")
            return
            
        # Implementation would go here
        click.echo("Retrieved next task")
        self.audit_logger.log_success(
            command='get_next_task',
            user=user
        )

    @click.command()
    @click.option('--task-id', required=True, help='Task ID to process')
    @click.option('--user', required=True, help='User processing task')
    @timed_command
    def process_task(self, task_id: str, user: str):
        """Process a task with RBAC validation"""
        self.audit_logger.log_attempt(
            command='process_task',
            user=user,
            params={'task_id': task_id}
        )
        
        if not rbac.validate_permission(user, 'task_process'):
            self.audit_logger.log_denial(
                command='process_task',
                user=user,
                reason='RBAC validation failed'
            )
            click.echo("Permission denied")
            return
            
        # Implementation would go here
        click.echo(f"Processed task {task_id}")
        self.audit_logger.log_success(
            command='process_task',
            user=user,
            result={'task_id': task_id}
        )

    @click.command()
    @click.option('--user', required=True, help='User to validate')
    @click.option('--permission', required=True, help='Permission to validate')
    @timed_command
    def validate_permissions(self, user: str, permission: str):
        """Validate user permissions"""
        self.audit_logger.log_attempt(
            command='validate_permissions',
            user=user,
            params={'permission': permission}
        )
        
        result = rbac.validate_permission(user, permission)
        self.audit_logger.log_validation(
            user=user,
            permission=permission,
            result=result
        )
        click.echo(f"Permission {'granted' if result else 'denied'}")