import json
import os
from typing import List, Optional
from models import Product, ProductCategory

class ProductDatabase:
    def __init__(self, json_file: str = "products.json"):
        self.json_file = json_file
        self.products = self.load_products()
        
    def load_products(self) -> List[Product]:
        if os.path.exists(self.json_file):
            with open(self.json_file, 'r') as f:
                data = json.load(f)
                return [Product(**item) for item in data]
        return self.create_default_products()
    
    def create_default_products(self) -> List[Product]:
        products = [
            # Personal Care Products
            Product(
                id=1,
                name="Regular Shampoo",
                category=ProductCategory.PERSONAL_CARE,
                ingredients=["sodium lauryl sulfate", "parabens", "fragrance", "sodium chloride"],
                packaging=["plastic bottle"],
                contains_chemicals=True,
                water_usage="medium",
                carbon_footprint="medium"
            ),
            Product(
                id=2,
                name="Organic Shampoo Bar",
                category=ProductCategory.PERSONAL_CARE,
                ingredients=["coconut oil", "shea butter", "essential oils", "clay"],
                packaging=["cardboard box"],
                is_organic=True,
                contains_chemicals=False,
                water_usage="low",
                carbon_footprint="low"
            ),
            Product(
                id=3,
                name="Plastic Toothbrush",
                category=ProductCategory.PERSONAL_CARE,
                materials=["plastic", "nylon"],
                packaging=["plastic blister pack"],
                contains_chemicals=True,
                is_recyclable=False,
                water_usage="low",
                carbon_footprint="medium"
            ),
            Product(
                id=4,
                name="Bamboo Toothbrush",
                category=ProductCategory.PERSONAL_CARE,
                materials=["bamboo", "nylon", "cardboard"],
                packaging=["cardboard box"],
                is_organic=True,
                is_recyclable=True,
                water_usage="low",
                carbon_footprint="low"
            ),
            Product(
                id=5,
                name="Plastic Deodorant",
                category=ProductCategory.PERSONAL_CARE,
                ingredients=["aluminum compounds", "parabens", "propylene glycol", "fragrance"],
                packaging=["plastic container"],
                contains_chemicals=True,
                water_usage="medium",
                carbon_footprint="medium"
            ),
            Product(
                id=6,
                name="Natural Crystal Deodorant",
                category=ProductCategory.PERSONAL_CARE,
                ingredients=["potassium alum", "mineral salts"],
                packaging=["cardboard box"],
                contains_chemicals=False,
                is_organic=True,
                water_usage="low",
                carbon_footprint="low"
            ),
            Product(
                id=7,
                name="Disposable Razor",
                category=ProductCategory.PERSONAL_CARE,
                materials=["plastic", "stainless steel"],
                packaging=["plastic packaging"],
                contains_chemicals=True,
                is_recyclable=False,
                water_usage="low",
                carbon_footprint="medium"
            ),
            Product(
                id=8,
                name="Safety Razor",
                category=ProductCategory.PERSONAL_CARE,
                materials=["stainless steel", "brass"],
                packaging=["cardboard box"],
                contains_chemicals=False,
                is_recyclable=True,
                water_usage="low",
                carbon_footprint="low"
            ),
            
            # Food Products
            Product(
                id=9,
                name="Palm Oil Cooking Oil",
                category=ProductCategory.FOOD,
                ingredients=["palm oil"],
                packaging=["plastic bottle"],
                contains_palm_oil=True,
                water_usage="high",
                carbon_footprint="high"
            ),
            Product(
                id=10,
                name="Olive Oil",
                category=ProductCategory.FOOD,
                ingredients=["olive oil"],
                packaging=["glass bottle"],
                contains_palm_oil=False,
                is_organic=True,
                water_usage="medium",
                carbon_footprint="medium"
            ),
            Product(
                id=11,
                name="Plastic-Wrapped Cucumber",
                category=ProductCategory.FOOD,
                ingredients=["cucumber"],
                packaging=["plastic wrap"],
                contains_chemicals=False,
                water_usage="medium",
                carbon_footprint="medium"
            ),
            Product(
                id=12,
                name="Loose Organic Cucumber",
                category=ProductCategory.FOOD,
                ingredients=["cucumber"],
                packaging=["none"],
                is_organic=True,
                water_usage="low",
                carbon_footprint="low"
            ),
            Product(
                id=13,
                name="Coffee Pods (Plastic)",
                category=ProductCategory.FOOD,
                ingredients=["coffee", "plastic"],
                packaging=["plastic pods", "cardboard box"],
                contains_chemicals=True,
                is_recyclable=False,
                water_usage="high",
                carbon_footprint="high"
            ),
            Product(
                id=14,
                name="Ground Coffee (Compostable Bag)",
                category=ProductCategory.FOOD,
                ingredients=["coffee"],
                packaging=["compostable paper bag"],
                is_organic=True,
                is_recyclable=True,
                water_usage="medium",
                carbon_footprint="medium"
            ),
            
            # Beverages
            Product(
                id=15,
                name="Plastic Water Bottle",
                category=ProductCategory.BEVERAGE,
                materials=["plastic"],
                packaging=["plastic bottle"],
                is_recyclable=True,
                water_usage="medium",
                carbon_footprint="high"
            ),
            Product(
                id=16,
                name="Reusable Stainless Steel Bottle",
                category=ProductCategory.BEVERAGE,
                materials=["stainless steel"],
                packaging=["cardboard box"],
                is_recyclable=True,
                water_usage="low",
                carbon_footprint="low"
            ),
            Product(
                id=17,
                name="Aluminum Soda Can",
                category=ProductCategory.BEVERAGE,
                materials=["aluminum"],
                packaging=["aluminum can"],
                is_recyclable=True,
                water_usage="medium",
                carbon_footprint="medium"
            ),
            Product(
                id=18,
                name="Plastic Soda Bottle",
                category=ProductCategory.BEVERAGE,
                materials=["plastic"],
                packaging=["plastic bottle"],
                is_recyclable=True,
                water_usage="medium",
                carbon_footprint="high"
            ),
            Product(
                id=19,
                name="Glass Milk Bottle",
                category=ProductCategory.BEVERAGE,
                materials=["glass"],
                packaging=["glass bottle"],
                is_recyclable=True,
                water_usage="medium",
                carbon_footprint="medium"
            ),
            Product(
                id=20,
                name="Tetra Pak Juice Box",
                category=ProductCategory.BEVERAGE,
                materials=["paper", "plastic", "aluminum"],
                packaging=["tetra pak"],
                is_recyclable=False,
                water_usage="medium",
                carbon_footprint="medium"
            ),
            
            # Clothing
            Product(
                id=21,
                name="Organic Cotton T-shirt",
                category=ProductCategory.CLOTHING,
                materials=["organic cotton"],
                packaging=["paper bag"],
                is_organic=True,
                water_usage="low",
                carbon_footprint="low"
            ),
            Product(
                id=22,
                name="Conventional Cotton T-shirt",
                category=ProductCategory.CLOTHING,
                materials=["cotton"],
                packaging=["plastic bag"],
                contains_chemicals=True,
                water_usage="high",
                carbon_footprint="medium"
            ),
            Product(
                id=23,
                name="Polyester Jacket",
                category=ProductCategory.CLOTHING,
                materials=["polyester", "nylon"],
                packaging=["plastic bag"],
                contains_chemicals=True,
                water_usage="medium",
                carbon_footprint="high"
            ),
            Product(
                id=24,
                name="Recycled Polyester Jacket",
                category=ProductCategory.CLOTHING,
                materials=["recycled polyester"],
                packaging=["recycled paper bag"],
                is_recyclable=True,
                water_usage="medium",
                carbon_footprint="low"
            ),
            Product(
                id=25,
                name="Leather Boots",
                category=ProductCategory.CLOTHING,
                materials=["leather", "rubber"],
                packaging=["cardboard box"],
                contains_chemicals=True,
                water_usage="high",
                carbon_footprint="high"
            ),
            Product(
                id=26,
                name="Vegan Leather Boots",
                category=ProductCategory.CLOTHING,
                materials=["polyurethane", "rubber"],
                packaging=["cardboard box"],
                contains_chemicals=True,
                water_usage="medium",
                carbon_footprint="medium"
            ),
            Product(
                id=27,
                name="Fast Fashion Dress",
                category=ProductCategory.CLOTHING,
                materials=["polyester", "spandex"],
                packaging=["plastic bag"],
                contains_chemicals=True,
                water_usage="high",
                carbon_footprint="high"
            ),
            Product(
                id=28,
                name="Vintage/Second-hand Dress",
                category=ProductCategory.CLOTHING,
                materials=["various"],
                packaging=["none"],
                is_organic=False,
                water_usage="low",
                carbon_footprint="very low"
            ),
            
            # Household Products
            Product(
                id=29,
                name="Plastic Dish Scourer",
                category=ProductCategory.HOUSEHOLD,
                materials=["plastic", "nylon"],
                packaging=["plastic packaging"],
                contains_chemicals=True,
                is_recyclable=False,
                water_usage="low",
                carbon_footprint="medium"
            ),
            Product(
                id=30,
                name="Natural Loofah Scourer",
                category=ProductCategory.HOUSEHOLD,
                materials=["loofah", "cotton"],
                packaging=["cardboard"],
                is_organic=True,
                is_recyclable=True,
                water_usage="low",
                carbon_footprint="low"
            ),
            Product(
                id=31,
                name="Chemical Cleaner (Bleach)",
                category=ProductCategory.HOUSEHOLD,
                ingredients=["sodium hypochlorite", "surfactants", "fragrance"],
                packaging=["plastic bottle"],
                contains_chemicals=True,
                water_usage="medium",
                carbon_footprint="medium"
            ),
            Product(
                id=32,
                name="Vinegar-Based Cleaner",
                category=ProductCategory.HOUSEHOLD,
                ingredients=["vinegar", "essential oils", "water"],
                packaging=["glass bottle"],
                contains_chemicals=False,
                is_organic=True,
                water_usage="low",
                carbon_footprint="low"
            ),
            Product(
                id=33,
                name="Plastic Trash Bags",
                category=ProductCategory.HOUSEHOLD,
                materials=["plastic"],
                packaging=["cardboard box"],
                contains_chemicals=True,
                is_recyclable=False,
                water_usage="low",
                carbon_footprint="medium"
            ),
            Product(
                id=34,
                name="Compostable Trash Bags",
                category=ProductCategory.HOUSEHOLD,
                materials=["corn starch", "plant materials"],
                packaging=["cardboard box"],
                is_organic=True,
                is_recyclable=True,
                water_usage="low",
                carbon_footprint="low"
            ),
            
            # Electronics
            Product(
                id=35,
                name="Smartphone",
                category=ProductCategory.ELECTRONICS,
                materials=["plastic", "glass", "lithium", "rare earth metals"],
                packaging=["cardboard box", "plastic"],
                contains_chemicals=True,
                is_recyclable=False,
                water_usage="high",
                carbon_footprint="high"
            ),
            Product(
                id=36,
                name="Refurbished Smartphone",
                category=ProductCategory.ELECTRONICS,
                materials=["plastic", "glass", "lithium", "rare earth metals"],
                packaging=["recycled cardboard"],
                contains_chemicals=True,
                is_recyclable=True,
                water_usage="low",
                carbon_footprint="low"
            ),
            Product(
                id=37,
                name="Single-use Batteries",
                category=ProductCategory.ELECTRONICS,
                materials=["zinc", "manganese", "plastic", "chemicals"],
                packaging=["plastic blister pack"],
                contains_chemicals=True,
                is_recyclable=False,
                water_usage="medium",
                carbon_footprint="high"
            ),
            Product(
                id=38,
                name="Rechargeable Batteries",
                category=ProductCategory.ELECTRONICS,
                materials=["lithium-ion", "nickel"],
                packaging=["cardboard box"],
                contains_chemicals=True,
                is_recyclable=True,
                water_usage="medium",
                carbon_footprint="medium"
            ),
            
            # Additional Food Products
            Product(
                id=39,
                name="Imported Avocados",
                category=ProductCategory.FOOD,
                ingredients=["avocados"],
                packaging=["none"],
                contains_palm_oil=False,
                water_usage="high",  # High water usage
                carbon_footprint="high"  # High transport emissions
            ),
            Product(
                id=40,
                name="Local Seasonal Vegetables",
                category=ProductCategory.FOOD,
                ingredients=["mixed vegetables"],
                packaging=["paper bag"],
                is_organic=True,
                water_usage="low",
                carbon_footprint="low"
            ),
            Product(
                id=41,
                name="Farmed Salmon",
                category=ProductCategory.FOOD,
                ingredients=["salmon"],
                packaging=["plastic tray", "plastic wrap"],
                contains_chemicals=True,
                water_usage="high",
                carbon_footprint="medium"
            ),
            Product(
                id=42,
                name="Wild Caught Salmon",
                category=ProductCategory.FOOD,
                ingredients=["salmon"],
                packaging=["paper"],
                is_organic=True,
                water_usage="low",
                carbon_footprint="low"
            ),
            Product(
                id=43,
                name="Beef (Feedlot)",
                category=ProductCategory.FOOD,
                ingredients=["beef"],
                packaging=["plastic wrap", "styrofoam"],
                contains_chemicals=True,
                water_usage="high",
                carbon_footprint="very high"
            ),
            Product(
                id=44,
                name="Grass-Fed Beef",
                category=ProductCategory.FOOD,
                ingredients=["beef"],
                packaging=["paper", "compostable wrap"],
                is_organic=True,
                water_usage="medium",
                carbon_footprint="high"
            ),
            Product(
                id=45,
                name="Plant-Based Burger",
                category=ProductCategory.FOOD,
                ingredients=["pea protein", "coconut oil", "potato starch"],
                packaging=["cardboard box"],
                contains_palm_oil=False,
                water_usage="low",
                carbon_footprint="low"
            ),
            
            # Household Paper Products
            Product(
                id=46,
                name="Virgin Paper Towels",
                category=ProductCategory.HOUSEHOLD,
                materials=["wood pulp"],
                packaging=["plastic wrap"],
                contains_palm_oil=False,
                water_usage="high",
                carbon_footprint="medium"
            ),
            Product(
                id=47,
                name="Recycled Paper Towels",
                category=ProductCategory.HOUSEHOLD,
                materials=["recycled paper"],
                packaging=["paper wrap"],
                is_recyclable=True,
                water_usage="low",
                carbon_footprint="low"
            ),
            Product(
                id=48,
                name="Bamboo Toilet Paper",
                category=ProductCategory.HOUSEHOLD,
                materials=["bamboo"],
                packaging=["paper wrap"],
                is_organic=True,
                water_usage="low",
                carbon_footprint="low"
            ),
            Product(
                id=49,
                name="Regular Toilet Paper",
                category=ProductCategory.HOUSEHOLD,
                materials=["wood pulp"],
                packaging=["plastic wrap"],
                contains_palm_oil=False,
                water_usage="high",
                carbon_footprint="medium"
            ),
            
            # Personal Care - Makeup
            Product(
                id=50,
                name="Conventional Lipstick",
                category=ProductCategory.PERSONAL_CARE,
                ingredients=["parabens", "petrolatum", "fragrance", "synthetic dyes"],
                packaging=["plastic tube"],
                contains_chemicals=True,
                water_usage="medium",
                carbon_footprint="medium"
            ),
            Product(
                id=51,
                name="Natural Lipstick",
                category=ProductCategory.PERSONAL_CARE,
                ingredients=["beeswax", "shea butter", "natural pigments"],
                packaging=["recycled cardboard"],
                is_organic=True,
                contains_chemicals=False,
                water_usage="low",
                carbon_footprint="low"
            ),
            Product(
                id=52,
                name="Plastic Makeup Wipes",
                category=ProductCategory.PERSONAL_CARE,
                ingredients=["polyester", "chemicals", "preservatives"],
                packaging=["plastic pouch"],
                contains_chemicals=True,
                is_recyclable=False,
                water_usage="medium",
                carbon_footprint="medium"
            ),
            Product(
                id=53,
                name="Reusable Cotton Rounds",
                category=ProductCategory.PERSONAL_CARE,
                materials=["organic cotton"],
                packaging=["cardboard box"],
                is_organic=True,
                is_recyclable=True,
                water_usage="low",
                carbon_footprint="low"
            ),
            
            # Baby Products
            Product(
                id=54,
                name="Disposable Diapers",
                category=ProductCategory.PERSONAL_CARE,
                materials=["plastic", "wood pulp", "superabsorbent polymers"],
                packaging=["plastic bag"],
                contains_chemicals=True,
                is_recyclable=False,
                water_usage="high",
                carbon_footprint="high"
            ),
            Product(
                id=55,
                name="Cloth Diapers",
                category=ProductCategory.PERSONAL_CARE,
                materials=["organic cotton", "bamboo"],
                packaging=["reusable bag"],
                is_organic=True,
                is_recyclable=True,
                water_usage="medium",
                carbon_footprint="low"
            ),
            
            # Pet Products
            Product(
                id=56,
                name="Plastic Pet Food Bowl",
                category=ProductCategory.HOUSEHOLD,
                materials=["plastic"],
                packaging=["plastic"],
                contains_chemicals=True,
                water_usage="low",
                carbon_footprint="medium"
            ),
            Product(
                id=57,
                name="Stainless Steel Pet Bowl",
                category=ProductCategory.HOUSEHOLD,
                materials=["stainless steel"],
                packaging=["cardboard"],
                is_recyclable=True,
                water_usage="low",
                carbon_footprint="low"
            ),
            Product(
                id=58,
                name="Conventional Cat Litter",
                category=ProductCategory.HOUSEHOLD,
                materials=["clay", "silica", "chemicals"],
                packaging=["plastic bag"],
                contains_chemicals=True,
                water_usage="medium",
                carbon_footprint="medium"
            ),
            Product(
                id=59,
                name="Biodegradable Cat Litter",
                category=ProductCategory.HOUSEHOLD,
                materials=["recycled paper", "wood", "corn"],
                packaging=["paper bag"],
                is_organic=True,
                is_recyclable=True,
                water_usage="low",
                carbon_footprint="low"
            ),
            
            # Office Supplies
            Product(
                id=60,
                name="Plastic Pens (Pack)",
                category=ProductCategory.OTHER,
                materials=["plastic", "ink"],
                packaging=["plastic blister pack"],
                contains_chemicals=True,
                is_recyclable=False,
                water_usage="medium",
                carbon_footprint="medium"
            ),
            Product(
                id=61,
                name="Refillable Bamboo Pen",
                category=ProductCategory.OTHER,
                materials=["bamboo", "metal", "ink"],
                packaging=["cardboard"],
                is_organic=True,
                is_recyclable=True,
                water_usage="low",
                carbon_footprint="low"
            ),
            Product(
                id=62,
                name="Plastic Stapler",
                category=ProductCategory.OTHER,
                materials=["plastic", "metal"],
                packaging=["plastic"],
                contains_chemicals=True,
                is_recyclable=False,
                water_usage="low",
                carbon_footprint="medium"
            ),
            Product(
                id=63,
                name="Metal Stapler",
                category=ProductCategory.OTHER,
                materials=["metal"],
                packaging=["cardboard"],
                is_recyclable=True,
                water_usage="low",
                carbon_footprint="low"
            ),
        ]
        
        # Save to JSON file
        with open(self.json_file, 'w') as f:
            json.dump([p.dict() for p in products], f, indent=2)
        
        return products
    
    def search_product(self, query: str) -> Optional[Product]:
        """Search for a product by name (partial match)"""
        query = query.lower()
        
        # First try exact match
        for product in self.products:
            if query == product.name.lower():
                return product
        
        # Then try partial match
        for product in self.products:
            if query in product.name.lower():
                return product
        
        # Try matching individual words
        query_words = query.split()
        best_match = None
        best_match_count = 0
        
        for product in self.products:
            product_name_lower = product.name.lower()
            match_count = sum(1 for word in query_words if word in product_name_lower)
            
            if match_count > best_match_count:
                best_match_count = match_count
                best_match = product
        
        return best_match if best_match_count > 0 else None
    
    def get_products_by_category(self, category: ProductCategory) -> List[Product]:
        """Get all products in a specific category"""
        return [p for p in self.products if p.category == category]
    
    def get_all_products(self) -> List[Product]:
        """Get all products"""
        return self.products
    
    def get_alternatives(self, category: ProductCategory, exclude_id: int, limit: int = 3) -> List[Product]:
        """Get alternative products in the same category"""
        # Get products in same category with better eco characteristics
        alternatives = []
        
        for product in self.products:
            if product.id != exclude_id and product.category == category:
                # Prioritize organic, recyclable, low-impact products
                score = 0
                if product.is_organic:
                    score += 3
                if product.is_recyclable:
                    score += 2
                if not product.contains_chemicals:
                    score += 2
                if not product.contains_palm_oil:
                    score += 1
                if product.water_usage == 'low':
                    score += 1
                if product.carbon_footprint == 'low':
                    score += 1
                
                alternatives.append((score, product))
        
        # Sort by score (higher is better) and return top alternatives
        alternatives.sort(key=lambda x: x[0], reverse=True)
        return [p for _, p in alternatives[:limit]]
    
    def add_product(self, product: Product) -> int:
        """Add a new product to the database"""
        # Generate new ID
        new_id = max([p.id for p in self.products if p.id is not None] + [0]) + 1
        product.id = new_id
        
        self.products.append(product)
        
        # Save to JSON
        with open(self.json_file, 'w') as f:
            json.dump([p.dict() for p in self.products], f, indent=2)
        
        return new_id
    
    def get_product_summary(self) -> dict:
        """Get summary statistics about products"""
        summary = {
            'total_products': len(self.products),
            'by_category': {},
            'organic_count': 0,
            'recyclable_count': 0,
            'contains_palm_oil': 0,
            'contains_chemicals': 0
        }
        
        for product in self.products:
            # Count by category
            category = product.category.value
            summary['by_category'][category] = summary['by_category'].get(category, 0) + 1
            
            # Count attributes
            if product.is_organic:
                summary['organic_count'] += 1
            if product.is_recyclable:
                summary['recyclable_count'] += 1
            if product.contains_palm_oil:
                summary['contains_palm_oil'] += 1
            if product.contains_chemicals:
                summary['contains_chemicals'] += 1
        
        return summary