# vendor.py - Keep basic format validation, remove business logic
import re
from datetime import datetime
from typing import List, Optional
from pydantic import BaseModel, ConfigDict, Field, field_validator

class VendorCreate(BaseModel):
    vendor_code: str = Field(..., description="Unique vendor identifier")
    vendor_name: str = Field(..., description="Display name of the vendor ")
    description: Optional[str] = Field(None, description="Vendor description")
    contact_email: Optional[str] = None
    contact_phone: Optional[str] = None
    website: Optional[str] = None
    business_address: Optional[str] = None
    tax_number: Optional[str] = None
    # Removed: min_length, max_length constraints - let service handle

    @field_validator("contact_email")
    @classmethod
    def validate_contact_email(cls, v):
        # Keep basic format validation for data integrity
        if v and ("@" not in v or "." not in v):
            raise ValueError("Invalid email format")
        return v.lower() if v else v

class VendorUpdate(BaseModel):
    vendor_name: Optional[str] = None
    description: Optional[str] = None
    contact_email: Optional[str] = None
    contact_phone: Optional[str] = None
    website: Optional[str] = None
    business_address: Optional[str] = None
    tax_number: Optional[str] = None

    @field_validator("contact_email")
    @classmethod
    def validate_contact_email(cls, v):
        if v and ("@" not in v or "." not in v):
            raise ValueError("Invalid email format")
        return v.lower() if v else v

class VendorResponse(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: int
    vendor_code: str
    vendor_name: str
    description: Optional[str]
    owner_id: int
    contact_email: Optional[str]
    contact_phone: Optional[str]
    website: Optional[str]
    business_address: Optional[str]
    tax_number: Optional[str]
    is_active: bool
    is_verified: bool
    created_at: datetime
    updated_at: datetime

class VendorListResponse(BaseModel):
    vendors: List[VendorResponse]
    total: int
    skip: int
    limit: int