import sqlite3
from datetime import datetime, date
from typing import List, Optional
from src.models import StockMovement


class BaseDAO:
    """Base DAO class with common database operations"""
    
    def __init__(self, db_manager):
        self.db_manager = db_manager


class StockMovementDAO(BaseDAO):
    """Data access object for StockMovement model"""
    
    def create(self, movement: StockMovement) -> bool:
        """Create a new stock movement record"""
        if not self.db_manager.connect():
            return False
            
        try:
            cursor = self.db_manager.connection.cursor()
            cursor.execute('''
                INSERT INTO stock_movements (product_id, movement_type, quantity, reference_type, reference_id)
                VALUES (?, ?, ?, ?, ?)
            ''', (movement.product_id, movement.movement_type, movement.quantity, 
                  movement.reference_type, movement.reference_id))
            
            movement.id = cursor.lastrowid
            self.db_manager.connection.commit()
            return True
        except Exception as e:
            print(f"Error creating stock movement: {e}")
            return False
        finally:
            self.db_manager.disconnect()
            
    def get_by_id(self, movement_id: int) -> Optional[StockMovement]:
        """Get stock movement by ID"""
        if not self.db_manager.connect():
            return None
            
        try:
            cursor = self.db_manager.connection.cursor()
            cursor.execute('SELECT * FROM stock_movements WHERE id = ?', (movement_id,))
            row = cursor.fetchone()
            
            if row:
                created_at = datetime.fromisoformat(row['created_at']) if row['created_at'] else None
                
                return StockMovement(
                    id=row['id'],
                    product_id=row['product_id'],
                    movement_type=row['movement_type'],
                    quantity=row['quantity'],
                    reference_type=row['reference_type'],
                    reference_id=row['reference_id']
                )
            return None
        except Exception as e:
            print(f"Error getting stock movement: {e}")
            return None
        finally:
            self.db_manager.disconnect()
            
    def get_by_product_id(self, product_id: int) -> List[StockMovement]:
        """Get all stock movements for a product"""
        if not self.db_manager.connect():
            return []
            
        try:
            cursor = self.db_manager.connection.cursor()
            cursor.execute('SELECT * FROM stock_movements WHERE product_id = ? ORDER BY created_at DESC', (product_id,))
            rows = cursor.fetchall()
            
            movements = []
            for row in rows:
                created_at = datetime.fromisoformat(row['created_at']) if row['created_at'] else None
                
                movements.append(StockMovement(
                    id=row['id'],
                    product_id=row['product_id'],
                    movement_type=row['movement_type'],
                    quantity=row['quantity'],
                    reference_type=row['reference_type'],
                    reference_id=row['reference_id']
                ))
            return movements
        except Exception as e:
            print(f"Error getting stock movements: {e}")
            return []
        finally:
            self.db_manager.disconnect()
            
    def get_all(self) -> List[StockMovement]:
        """Get all stock movements"""
        if not self.db_manager.connect():
            return []
            
        try:
            cursor = self.db_manager.connection.cursor()
            cursor.execute('SELECT * FROM stock_movements ORDER BY created_at DESC')
            rows = cursor.fetchall()
            
            movements = []
            for row in rows:
                created_at = datetime.fromisoformat(row['created_at']) if row['created_at'] else None
                
                movements.append(StockMovement(
                    id=row['id'],
                    product_id=row['product_id'],
                    movement_type=row['movement_type'],
                    quantity=row['quantity'],
                    reference_type=row['reference_type'],
                    reference_id=row['reference_id']
                ))
            return movements
        except Exception as e:
            print(f"Error getting stock movements: {e}")
            return []
        finally:
            self.db_manager.disconnect()
            
    def get_by_date_range(self, start_date: date, end_date: date) -> List[StockMovement]:
        """Get stock movements within a date range"""
        if not self.db_manager.connect():
            return []
            
        try:
            cursor = self.db_manager.connection.cursor()
            cursor.execute('''
                SELECT * FROM stock_movements 
                WHERE DATE(created_at) BETWEEN ? AND ? 
                ORDER BY created_at DESC
            ''', (start_date.isoformat(), end_date.isoformat()))
            rows = cursor.fetchall()
            
            movements = []
            for row in rows:
                created_at = datetime.fromisoformat(row['created_at']) if row['created_at'] else None
                
                movements.append(StockMovement(
                    id=row['id'],
                    product_id=row['product_id'],
                    movement_type=row['movement_type'],
                    quantity=row['quantity'],
                    reference_type=row['reference_type'],
                    reference_id=row['reference_id']
                ))
            return movements
        except Exception as e:
            print(f"Error getting stock movements by date range: {e}")
            return []
        finally:
            self.db_manager.disconnect()