"""Pydantic schemas for Product model"""
from pydantic import BaseModel, Field, field_validator, ConfigDict
from decimal import Decimal
from datetime import datetime
from typing import Optional


class ProductCreateRequest(BaseModel):
    """Schema for creating a new product"""
    model_config = ConfigDict(
        json_schema_extra={
            "example": {
                "name": "Handcrafted Wooden Bowl",
                "description": "A beautiful handcrafted bowl made from oak",
                "price": 45.99,
                "stock": 10,
                "image_url": "https://example.com/bowl.jpg"
            }
        }
    )
    
    name: str = Field(..., min_length=1, max_length=200, description="Product name")
    description: Optional[str] = Field(None, description="Product description")
    price: Decimal = Field(..., gt=0, description="Product price (must be greater than 0)")
    stock: int = Field(default=0, ge=0, description="Product stock quantity")
    image_url: Optional[str] = Field(None, max_length=500, description="Product image URL")
    
    @field_validator("price")
    @classmethod
    def validate_price(cls, v: Decimal) -> Decimal:
        """Validate that price has at most 2 decimal places"""
        if v.as_tuple().exponent < -2:
            raise ValueError("Price must have at most 2 decimal places")
        return v


class ProductResponse(BaseModel):
    """Schema for product response"""
    model_config = ConfigDict(
        from_attributes=True,
        json_schema_extra={
            "example": {
                "id": 1,
                "name": "Handcrafted Wooden Bowl",
                "description": "A beautiful handcrafted bowl made from oak",
                "price": 45.99,
                "stock": 10,
                "image_url": "https://example.com/bowl.jpg",
                "is_active": True,
                "created_at": "2024-01-15T10:30:00",
                "updated_at": "2024-01-15T10:30:00"
            }
        }
    )
    
    id: int
    name: str
    description: Optional[str] = None
    price: float
    stock: int
    image_url: Optional[str] = None
    is_active: bool
    created_at: Optional[datetime] = None
    updated_at: Optional[datetime] = None