"""
Inventory Manager Agent

Manages inventory levels, tracks stock, automates reordering,
and optimizes inventory across locations.
"""

from typing import Any, Dict, List
from agents.base import BaseAgent


class InventoryManagerAgent(BaseAgent):
    """
    Manages inventory and stock levels.

    Features:
    - Stock tracking
    - Automated reordering
    - Multi-location management
    - Demand forecasting
    - Stock optimization
    - Waste reduction
    """

    def __init__(self):
        super().__init__(
            name='inventory-manager',
            description='Manage inventory levels and automate reordering',
            category='business',
            version='1.0.0',
            tags=['inventory', 'stock', 'warehousing', 'supply-chain', 'logistics']
        )

    async def execute(self, params: Dict[str, Any]) -> Dict[str, Any]:
        """
        Manage inventory operations.

        Args:
            params: {
                'operation': 'check_stock|reorder|transfer|adjust|forecast',
                'product_id': str,
                'location_id': str,
                'options': {
                    'auto_reorder': bool,
                    'optimize_levels': bool,
                    'track_expiry': bool,
                    'alert_low_stock': bool
                }
            }

        Returns:
            {
                'status': 'success|failed',
                'inventory': Dict,
                'recommendations': List[Dict],
                'alerts': List[Dict]
            }
        """
        operation = params.get('operation', 'check_stock')
        product_id = params.get('product_id')
        location_id = params.get('location_id')
        options = params.get('options', {})

        self.logger.info(f"Inventory operation: {operation}")

        # Mock inventory data
        inventory_items = [
            {
                'id': 'PRD-001',
                'sku': 'LAP-MBP-16-512',
                'name': 'MacBook Pro 16" 512GB',
                'category': 'Electronics',
                'current_stock': 45,
                'reorder_point': 20,
                'reorder_quantity': 50,
                'max_stock_level': 100,
                'unit_cost': 2499.00,
                'unit_price': 3199.00,
                'total_value': 112455.00,
                'locations': {
                    'WAREHOUSE-01': 30,
                    'WAREHOUSE-02': 10,
                    'STORE-NYC': 3,
                    'STORE-SF': 2
                },
                'status': 'adequate',
                'last_reorder_date': '2025-10-15',
                'supplier': 'Apple Inc',
                'lead_time_days': 7,
                'turnover_rate': 8.5,  # times per year
                'days_of_stock': 42
            },
            {
                'id': 'PRD-002',
                'sku': 'MON-DELL-27-4K',
                'name': 'Dell 27" 4K Monitor',
                'category': 'Electronics',
                'current_stock': 12,
                'reorder_point': 15,
                'reorder_quantity': 30,
                'max_stock_level': 50,
                'unit_cost': 449.00,
                'unit_price': 599.00,
                'total_value': 5388.00,
                'locations': {
                    'WAREHOUSE-01': 8,
                    'WAREHOUSE-02': 4,
                    'STORE-NYC': 0,
                    'STORE-SF': 0
                },
                'status': 'low_stock',
                'last_reorder_date': '2025-09-20',
                'supplier': 'Dell Technologies',
                'lead_time_days': 5,
                'turnover_rate': 12.3,
                'days_of_stock': 29,
                'reorder_triggered': True,
                'reorder_date': '2025-11-16',
                'expected_delivery': '2025-11-21'
            },
            {
                'id': 'PRD-003',
                'sku': 'OFF-CHR-ERG',
                'name': 'Ergonomic Office Chair',
                'category': 'Furniture',
                'current_stock': 3,
                'reorder_point': 10,
                'reorder_quantity': 25,
                'max_stock_level': 40,
                'unit_cost': 299.00,
                'unit_price': 449.00,
                'total_value': 897.00,
                'locations': {
                    'WAREHOUSE-01': 3,
                    'WAREHOUSE-02': 0,
                    'STORE-NYC': 0,
                    'STORE-SF': 0
                },
                'status': 'critical',
                'last_reorder_date': '2025-08-10',
                'supplier': 'ErgoFurniture Co',
                'lead_time_days': 14,
                'turnover_rate': 6.2,
                'days_of_stock': 18,
                'reorder_triggered': True,
                'reorder_date': '2025-11-15',
                'expected_delivery': '2025-11-29'
            },
            {
                'id': 'PRD-004',
                'sku': 'ACC-KB-MX',
                'name': 'Mechanical Keyboard',
                'category': 'Accessories',
                'current_stock': 156,
                'reorder_point': 50,
                'reorder_quantity': 100,
                'max_stock_level': 200,
                'unit_cost': 79.00,
                'unit_price': 129.00,
                'total_value': 12324.00,
                'locations': {
                    'WAREHOUSE-01': 100,
                    'WAREHOUSE-02': 40,
                    'STORE-NYC': 8,
                    'STORE-SF': 8
                },
                'status': 'adequate',
                'last_reorder_date': '2025-11-01',
                'supplier': 'KeyTech Industries',
                'lead_time_days': 3,
                'turnover_rate': 15.8,
                'days_of_stock': 36
            },
            {
                'id': 'PRD-005',
                'sku': 'NET-RTR-WIFI6',
                'name': 'WiFi 6 Router',
                'category': 'Networking',
                'current_stock': 234,
                'reorder_point': 60,
                'reorder_quantity': 120,
                'max_stock_level': 250,
                'unit_cost': 189.00,
                'unit_price': 279.00,
                'total_value': 44226.00,
                'locations': {
                    'WAREHOUSE-01': 180,
                    'WAREHOUSE-02': 40,
                    'STORE-NYC': 7,
                    'STORE-SF': 7
                },
                'status': 'overstock',
                'last_reorder_date': '2025-10-28',
                'supplier': 'NetGear Corp',
                'lead_time_days': 4,
                'turnover_rate': 10.2,
                'days_of_stock': 83,
                'overstock_days': 48
            }
        ]

        # Mock reorder recommendations
        reorder_recommendations = [
            {
                'product_id': 'PRD-003',
                'product_name': 'Ergonomic Office Chair',
                'current_stock': 3,
                'reorder_point': 10,
                'recommended_order_qty': 25,
                'priority': 'critical',
                'estimated_stockout_date': '2025-11-22',
                'days_until_stockout': 6,
                'supplier': 'ErgoFurniture Co',
                'lead_time_days': 14,
                'order_cost': 7475.00,
                'reason': 'Below reorder point - critical stock level'
            },
            {
                'product_id': 'PRD-002',
                'product_name': 'Dell 27" 4K Monitor',
                'current_stock': 12,
                'reorder_point': 15,
                'recommended_order_qty': 30,
                'priority': 'high',
                'estimated_stockout_date': '2025-12-05',
                'days_until_stockout': 19,
                'supplier': 'Dell Technologies',
                'lead_time_days': 5,
                'order_cost': 13470.00,
                'reason': 'Below reorder point - trending toward stockout'
            }
        ]

        # Mock stock movements
        recent_movements = [
            {
                'date': '2025-11-16',
                'type': 'sale',
                'product_id': 'PRD-001',
                'product_name': 'MacBook Pro 16"',
                'quantity': -2,
                'location': 'STORE-NYC',
                'reference': 'ORDER-12345'
            },
            {
                'date': '2025-11-15',
                'type': 'reorder_placed',
                'product_id': 'PRD-003',
                'product_name': 'Ergonomic Office Chair',
                'quantity': 25,
                'location': 'WAREHOUSE-01',
                'reference': 'PO-9876',
                'expected_delivery': '2025-11-29'
            },
            {
                'date': '2025-11-15',
                'type': 'transfer',
                'product_id': 'PRD-004',
                'product_name': 'Mechanical Keyboard',
                'quantity': -10,
                'from_location': 'WAREHOUSE-01',
                'to_location': 'STORE-SF',
                'reference': 'TRANS-567'
            },
            {
                'date': '2025-11-14',
                'type': 'receipt',
                'product_id': 'PRD-005',
                'product_name': 'WiFi 6 Router',
                'quantity': 120,
                'location': 'WAREHOUSE-01',
                'reference': 'PO-9854'
            },
            {
                'date': '2025-11-13',
                'type': 'adjustment',
                'product_id': 'PRD-002',
                'product_name': 'Dell Monitor',
                'quantity': -1,
                'location': 'WAREHOUSE-02',
                'reference': 'ADJ-123',
                'reason': 'Damaged unit'
            }
        ]

        # Mock inventory analytics
        analytics = {
            'total_items': 5,
            'total_stock_value': 175290.00,
            'total_stock_units': 450,
            'inventory_by_status': {
                'adequate': 2,
                'low_stock': 1,
                'critical': 1,
                'overstock': 1
            },
            'avg_turnover_rate': 10.6,
            'avg_days_of_stock': 45.6,
            'reorders_triggered': 2,
            'pending_receipts': 2,
            'pending_receipts_value': 20945.00,
            'stock_accuracy': 0.987,
            'carrying_cost_monthly': 2923.17,  # 2% of inventory value per month
            'stockout_risk_items': 2,
            'overstock_items': 1,
            'dead_stock_items': 0
        }

        # Mock demand forecast
        demand_forecast = {
            'product_id': 'PRD-001',
            'forecast_period': '30_days',
            'predicted_demand': 38,
            'confidence_level': 0.87,
            'forecast_method': 'time_series_analysis',
            'factors_considered': [
                'Historical sales',
                'Seasonal trends',
                'Market conditions',
                'Promotional calendar'
            ],
            'recommended_stock_level': 65,
            'current_stock': 45,
            'action': 'maintain_current_levels'
        }

        # Mock alerts
        alerts = [
            {
                'severity': 'critical',
                'type': 'stockout_risk',
                'product': 'PRD-003 - Ergonomic Office Chair',
                'message': 'Critical stock level - only 3 units remaining',
                'action_required': 'Expedite reorder or find alternative supplier',
                'estimated_stockout': '2025-11-22'
            },
            {
                'severity': 'high',
                'type': 'low_stock',
                'product': 'PRD-002 - Dell 27" 4K Monitor',
                'message': 'Stock below reorder point',
                'action_required': 'Reorder already placed - monitor delivery',
                'expected_delivery': '2025-11-21'
            },
            {
                'severity': 'medium',
                'type': 'overstock',
                'product': 'PRD-005 - WiFi 6 Router',
                'message': '83 days of stock - potential overstock',
                'action_required': 'Consider promotional campaign or reduce reorder quantity',
                'excess_units': 84
            },
            {
                'severity': 'low',
                'type': 'delivery_delay',
                'product': 'PRD-003 - Ergonomic Office Chair',
                'message': 'Reorder placed but lead time is 14 days',
                'action_required': 'Monitor for potential stockout before delivery',
                'gap_days': 6
            }
        ]

        # Mock location performance
        location_performance = {
            'WAREHOUSE-01': {
                'total_value': 145890.00,
                'utilization': 0.73,
                'turnover_rate': 11.2,
                'stockouts_ytd': 3,
                'accuracy_rate': 0.992
            },
            'WAREHOUSE-02': {
                'total_value': 24510.00,
                'utilization': 0.41,
                'turnover_rate': 9.8,
                'stockouts_ytd': 1,
                'accuracy_rate': 0.985
            },
            'STORE-NYC': {
                'total_value': 2445.00,
                'utilization': 0.88,
                'turnover_rate': 15.6,
                'stockouts_ytd': 8,
                'accuracy_rate': 0.978
            },
            'STORE-SF': {
                'total_value': 2445.00,
                'utilization': 0.85,
                'turnover_rate': 14.9,
                'stockouts_ytd': 6,
                'accuracy_rate': 0.981
            }
        }

        return {
            'status': 'success',
            'operation': operation,
            'inventory_items': inventory_items,
            'total_items': len(inventory_items),
            'reorder_recommendations': reorder_recommendations,
            'reorders_needed': len(reorder_recommendations),
            'recent_movements': recent_movements,
            'analytics': analytics,
            'demand_forecast': demand_forecast,
            'alerts': alerts,
            'critical_alerts': len([a for a in alerts if a['severity'] == 'critical']),
            'location_performance': location_performance,
            'optimization_opportunities': [
                {
                    'type': 'reduce_overstock',
                    'product': 'PRD-005 - WiFi 6 Router',
                    'potential_savings': '$8,845',
                    'action': 'Reduce reorder quantity by 40 units'
                },
                {
                    'type': 'transfer_stock',
                    'product': 'PRD-002 - Dell Monitor',
                    'from': 'WAREHOUSE-02',
                    'to': 'STORE-NYC',
                    'quantity': 3,
                    'benefit': 'Prevent stockout at retail location'
                },
                {
                    'type': 'consolidate',
                    'products': ['Multiple low-turnover items'],
                    'action': 'Consolidate to WAREHOUSE-01',
                    'potential_savings': '$1,250/month in carrying costs'
                }
            ],
            'recommendations': [
                'URGENT: Expedite PRD-003 order or source from alternative supplier',
                'Monitor PRD-002 delivery expected on 2025-11-21',
                'Reduce WiFi 6 Router reorder quantity to prevent overstock',
                'Transfer Dell monitors from WAREHOUSE-02 to STORE-NYC',
                'Review reorder points for store locations - frequent stockouts',
                'Implement safety stock for critical items with long lead times',
                'Consider increasing order frequency for fast-moving items'
            ],
            'next_steps': [
                'Process critical reorders immediately',
                'Contact ErgoFurniture for expedited delivery',
                'Execute recommended stock transfers',
                'Update reorder points based on demand forecast',
                'Conduct cycle count at WAREHOUSE-02',
                'Review and adjust max stock levels',
                'Schedule quarterly inventory optimization review'
            ]
        }

    def validate_params(self, params: Dict[str, Any]) -> bool:
        """Validate inventory management parameters."""
        valid_operations = [
            'check_stock', 'reorder', 'transfer', 'adjust', 'forecast'
        ]

        operation = params.get('operation')
        if operation and operation not in valid_operations:
            self.logger.error(f"Invalid operation: {operation}")
            return False

        return True
