from typing import List, Optional

from pydantic import BaseModel, EmailStr, Field


class SupplierBase(BaseModel):
    """
    Base supplier schema with common attributes.
    """
    name: str = Field(..., description="Supplier name")
    contact_name: Optional[str] = Field(None, description="Contact person name")
    email: Optional[EmailStr] = Field(None, description="Supplier email address")
    phone: Optional[str] = Field(None, description="Supplier phone number")
    address: Optional[str] = Field(None, description="Supplier address")


class SupplierCreate(SupplierBase):
    """
    Schema for supplier creation.
    """
    pass


class SupplierUpdate(BaseModel):
    """
    Schema for updating supplier information.
    """
    name: Optional[str] = Field(None, description="Supplier name")
    contact_name: Optional[str] = Field(None, description="Contact person name")
    email: Optional[EmailStr] = Field(None, description="Supplier email address")
    phone: Optional[str] = Field(None, description="Supplier phone number")
    address: Optional[str] = Field(None, description="Supplier address")


class SupplierInDBBase(SupplierBase):
    """
    Base schema for suppliers from the database.
    """
    id: int = Field(..., description="Supplier ID")

    class Config:
        from_attributes = True


class Supplier(SupplierInDBBase):
    """
    Schema for supplier information returned to clients.
    """
    pass


class SupplierWithItems(SupplierInDBBase):
    """
    Schema for supplier with related items.
    """
    from app.schemas.item import Item
    items: List[Item] = Field([], description="Items from this supplier")