# database/repositories/inventory_repository.py
from typing import List, Optional, Tuple
from datetime import datetime
from database.connection import get_connection
from model.inventory import InventoryRecord



class InventoryRepository:
    def get_all(self) -> List[InventoryRecord]:
        try:
            with get_connection() as conn:
                with conn.cursor() as cur:
                    cur.execute("SELECT * FROM inventory_history ORDER BY scanned_at DESC")
                    return [
                        InventoryRecord(
                            id=row[0],
                            robot_id=row[1],
                            product_id=row[2],
                            quantity=row[3],
                            zone=row[4],
                            row_number=row[5],
                            shelf_number=row[6],
                            status=row[7],
                            scanned_at=row[8],
                            created_at=row[9]
                        ) for row in cur.fetchall()
                    ]
        except Exception as e:
            print(f"Ошибка получения истории инвентаризации: {e}")
            return []

    def get_by_id(self, record_id: int) -> Optional[InventoryRecord]:
        try:
            with get_connection() as conn:
                with conn.cursor() as cur:
                    cur.execute("SELECT * FROM inventory_history WHERE id = %s", (record_id,))
                    row = cur.fetchone()
                    return InventoryRecord(*row) if row else None
        except Exception as e:
            print(f"Ошибка получения записи инвентаризации {record_id}: {e}")
            return None

    def create_record(self, robot_id: str, product_id: str, quantity: int, zone: str,
                      row_number: int, shelf_number: int, status: str, scanned_at: datetime) -> Optional[int]:
        try:
            with get_connection() as conn:
                with conn.cursor() as cur:
                    cur.execute("""
                        INSERT INTO inventory_history 
                        (robot_id, product_id, quantity, zone, row_number, shelf_number, status, scanned_at)
                        VALUES (%s, %s, %s, %s, %s, %s, %s, %s)
                        RETURNING id
                    """, (robot_id, product_id, quantity, zone, row_number, shelf_number, status, scanned_at))

                    record_id = cur.fetchone()[0]
                    conn.commit()
                    return record_id
        except Exception as e:
            print(f"Ошибка создания записи инвентаризации: {e}")
            return None

    def get_latest_inventory(self) -> List[InventoryRecord]:
        try:
            with get_connection() as conn:
                with conn.cursor() as cur:
                    cur.execute("""
                        SELECT DISTINCT ON (product_id) *
                        FROM inventory_history 
                        ORDER BY product_id, scanned_at DESC
                    """)
                    return [InventoryRecord(*row) for row in cur.fetchall()]
        except Exception as e:
            print(f"Ошибка получения последней записи инвентаризации по каждому товару: {e}")
            return []

    def get_records_by_product(self, product_id: str, limit: int = 100) -> List[InventoryRecord]:
        try:
            with get_connection() as conn:
                with conn.cursor() as cur:
                    cur.execute("""
                        SELECT * FROM inventory_history 
                        WHERE product_id = %s 
                        ORDER BY scanned_at DESC 
                        LIMIT %s
                    """, (product_id, limit))
                    return [InventoryRecord(*row) for row in cur.fetchall()]
        except Exception as e:
            print(f"Ошибка получения записи инвентаризации по продукту {product_id}: {e}")
            return []

    def get_records_by_robot(self, robot_id: str, limit: int = 100) -> List[InventoryRecord]:
        try:
            with get_connection() as conn:
                with conn.cursor() as cur:
                    cur.execute("""
                        SELECT * FROM inventory_history 
                        WHERE robot_id = %s 
                        ORDER BY scanned_at DESC 
                        LIMIT %s
                    """, (robot_id, limit))
                    return [InventoryRecord(*row) for row in cur.fetchall()]
        except Exception as e:
            print(f"Ошибка получения записи инвентаризации по роботу {robot_id}: {e}")
            return []

    def get_records_by_zone(self, zone: str, limit: int = 100) -> List[InventoryRecord]:
        try:
            with get_connection() as conn:
                with conn.cursor() as cur:
                    cur.execute("""
                        SELECT * FROM inventory_history 
                        WHERE zone = %s 
                        ORDER BY scanned_at DESC 
                        LIMIT %s
                    """, (zone, limit))
                    return [InventoryRecord(*row) for row in cur.fetchall()]
        except Exception as e:
            print(f"Ошибка получения записи инвентаризации по зоне {zone}: {e}")
            return []

    def get_critical_items(self, hours: int = 24) -> List[InventoryRecord]:
        try:
            with get_connection() as conn:
                with conn.cursor() as cur:
                    cur.execute("""
                        SELECT * FROM inventory_history 
                        WHERE status IN ('LOW_STOCK', 'CRITICAL') 
                        AND scanned_at >= NOW() - INTERVAL '%s hours'
                        ORDER BY scanned_at DESC
                    """, (hours,))
                    return [InventoryRecord(*row) for row in cur.fetchall()]
        except Exception as e:
            print(f"Ошибка получения товаров с критическим статусом: {e}")
            return []