"""
Diagnostic and monitoring routes.
"""

from flask import Blueprint, jsonify, request
from datetime import datetime
from functools import wraps

from web.controllers.auth_controller import optional_auth, require_auth

diagnostic_bp = Blueprint('diagnostic', __name__, url_prefix='/api/diagnostics')

# Simple decorator to handle API errors
def handle_api_errors(f):
    """Simple error handling decorator."""
    @wraps(f)
    def decorated_function(*args, **kwargs):
        try:
            return f(*args, **kwargs)
        except Exception as e:
            return jsonify({'status': 'error', 'message': str(e)}), 500
    return decorated_function

# Placeholder objects for missing modules
class PlaceholderNetworkChecker:
    def get_network_status(self): 
        return {
            "status": "unknown",
            "connected": True,
            "ping_ms": 0,
            "dns_working": True
        }
    def check_url_reachability(self, url): 
        return True

class PlaceholderErrorManager:
    def __init__(self):
        self.error_history = []
        self.blacklisted_urls = {}
        self.retry_counts = {}

class PlaceholderHealthMonitor:
    def get_current_health_status(self): 
        return {
            "status": "healthy",
            "uptime": "1h 30m",
            "memory_usage": "45%",
            "cpu_usage": "12%"
        }

class RetryableError(Exception):
    """Placeholder exception for retryable errors."""
    pass

network_health_checker = PlaceholderNetworkChecker()
error_recovery_manager = PlaceholderErrorManager()
health_monitor = PlaceholderHealthMonitor()

# Placeholder process lock constants and functions
RESCAN_LOCK = "rescan"
DOWNLOAD_LOCK = "download"

# Simple in-memory process lock system
_active_locks = {}

def is_process_running(lock_name):
    """Check if a process is currently running (locked)."""
    return lock_name in _active_locks

@diagnostic_bp.route('/network')
@handle_api_errors
@optional_auth
def network_diagnostics():
    """Get network diagnostics and connectivity status."""
    try:
        network_status = network_health_checker.get_network_status()
        
        # Test AniWorld connectivity
        aniworld_reachable = network_health_checker.check_url_reachability("https://aniworld.to")
        network_status['aniworld_reachable'] = aniworld_reachable
        
        return jsonify({
            'status': 'success',
            'data': network_status
        })
    except Exception as e:
        raise RetryableError(f"Network diagnostics failed: {e}")

@diagnostic_bp.route('/errors')
@handle_api_errors
@optional_auth
def get_error_history():
    """Get recent error history."""
    try:
        recent_errors = error_recovery_manager.error_history[-50:]  # Last 50 errors
        
        return jsonify({
            'status': 'success',
            'data': {
                'recent_errors': recent_errors,
                'total_errors': len(error_recovery_manager.error_history),
                'blacklisted_urls': list(error_recovery_manager.blacklisted_urls.keys())
            }
        })
    except Exception as e:
        raise RetryableError(f"Error history retrieval failed: {e}")

@diagnostic_bp.route('/system-status')
@handle_api_errors
@optional_auth
def system_status_summary():
    """Get comprehensive system status summary."""
    try:
        # Get health status
        health_status = health_monitor.get_current_health_status()
        
        # Get network status
        network_status = network_health_checker.get_network_status()
        
        # Get process status
        process_status = {
            'rescan_running': is_process_running(RESCAN_LOCK),
            'download_running': is_process_running(DOWNLOAD_LOCK)
        }
        
        # Get error statistics
        error_stats = {
            'total_errors': len(error_recovery_manager.error_history),
            'recent_errors': len([e for e in error_recovery_manager.error_history 
                                if (datetime.now() - datetime.fromisoformat(e.get('timestamp', datetime.now().isoformat()))).seconds < 3600]),
            'blacklisted_urls': len(error_recovery_manager.blacklisted_urls)
        }
        
        return jsonify({
            'status': 'success',
            'data': {
                'health': health_status,
                'network': network_status,
                'processes': process_status,
                'errors': error_stats,
                'timestamp': datetime.now().isoformat()
            }
        })
    except Exception as e:
        raise RetryableError(f"System status retrieval failed: {e}")

# Recovery routes
@diagnostic_bp.route('/recovery/clear-blacklist', methods=['POST'])
@handle_api_errors
@require_auth
def clear_blacklist():
    """Clear URL blacklist."""
    try:
        error_recovery_manager.blacklisted_urls.clear()
        return jsonify({
            'status': 'success',
            'message': 'URL blacklist cleared successfully'
        })
    except Exception as e:
        raise RetryableError(f"Blacklist clearing failed: {e}")

@diagnostic_bp.route('/recovery/retry-counts')
@handle_api_errors
@optional_auth
def get_retry_counts():
    """Get retry statistics."""
    try:
        return jsonify({
            'status': 'success',
            'data': {
                'retry_counts': error_recovery_manager.retry_counts,
                'total_retries': sum(error_recovery_manager.retry_counts.values())
            }
        })
    except Exception as e:
        raise RetryableError(f"Retry statistics retrieval failed: {e}")