import re
from datetime import datetime
from typing import List, Optional

from pydantic import BaseModel, ConfigDict, EmailStr, Field, field_validator

from models.api.stock import StockSummaryResponse


class ProductBase(BaseModel):
    product_id: Optional[str] = None
    title: Optional[str] = None
    description: Optional[str] = None
    link: Optional[str] = None
    image_link: Optional[str] = None
    availability: Optional[str] = None
    price: Optional[str] = None
    brand: Optional[str] = None
    gtin: Optional[str] = None
    mpn: Optional[str] = None
    condition: Optional[str] = None
    adult: Optional[str] = None
    multipack: Optional[int] = None
    is_bundle: Optional[str] = None
    age_group: Optional[str] = None
    color: Optional[str] = None
    gender: Optional[str] = None
    material: Optional[str] = None
    pattern: Optional[str] = None
    size: Optional[str] = None
    size_type: Optional[str] = None
    size_system: Optional[str] = None
    item_group_id: Optional[str] = None
    google_product_category: Optional[str] = None
    product_type: Optional[str] = None
    custom_label_0: Optional[str] = None
    custom_label_1: Optional[str] = None
    custom_label_2: Optional[str] = None
    custom_label_3: Optional[str] = None
    custom_label_4: Optional[str] = None
    additional_image_link: Optional[str] = None
    sale_price: Optional[str] = None
    unit_pricing_measure: Optional[str] = None
    unit_pricing_base_measure: Optional[str] = None
    identifier_exists: Optional[str] = None
    shipping: Optional[str] = None
    currency: Optional[str] = None
    # New marketplace fields
    marketplace: Optional[str] = None
    shop_name: Optional[str] = None


class ProductCreate(ProductBase):
    product_id: str = Field(..., min_length=1, description="Product ID is required")
    title: str = Field(..., min_length=1, description="Title is required")

    @field_validator("product_id", "title")
    @classmethod
    def validate_required_fields(cls, v):
        if not v or not v.strip():
            raise ValueError("Field cannot be empty")
        return v.strip()


class ProductUpdate(ProductBase):
    pass


class ProductResponse(ProductBase):
    model_config = ConfigDict(from_attributes=True)

    id: int
    created_at: datetime
    updated_at: datetime


class ProductListResponse(BaseModel):
    products: List[ProductResponse]
    total: int
    skip: int
    limit: int


class ProductDetailResponse(BaseModel):
    product: ProductResponse
    stock_info: Optional[StockSummaryResponse] = None