# models/schema/vendor_domain.py
"""
Pydantic schemas for Vendor Domain operations.

Schemas include:
- VendorDomainCreate: For adding custom domains
- VendorDomainUpdate: For updating domain settings
- VendorDomainResponse: Standard domain response
- VendorDomainListResponse: Paginated domain list
- DomainVerificationInstructions: DNS verification instructions
"""

import re
from datetime import datetime
from typing import List, Optional, Dict
from pydantic import BaseModel, ConfigDict, Field, field_validator


class VendorDomainCreate(BaseModel):
    """Schema for adding a custom domain to vendor."""

    domain: str = Field(
        ...,
        description="Custom domain (e.g., myshop.com or shop.mybrand.com)",
        min_length=3,
        max_length=255
    )
    is_primary: bool = Field(
        default=False,
        description="Set as primary domain for the vendor"
    )

    @field_validator('domain')
    @classmethod
    def validate_domain(cls, v: str) -> str:
        """Validate and normalize domain."""
        # Remove protocol if present
        domain = v.replace("https://", "").replace("http://", "")

        # Remove trailing slash
        domain = domain.rstrip("/")

        # Convert to lowercase
        domain = domain.lower().strip()

        # Basic validation
        if not domain or '/' in domain:
            raise ValueError("Invalid domain format")

        if '.' not in domain:
            raise ValueError("Domain must have at least one dot")

        # Check for reserved subdomains
        reserved = ['www', 'admin', 'api', 'mail', 'smtp', 'ftp', 'cpanel', 'webmail']
        first_part = domain.split('.')[0]
        if first_part in reserved:
            raise ValueError(f"Domain cannot start with reserved subdomain: {first_part}")

        # Validate domain format (basic regex)
        domain_pattern = r'^[a-z0-9]([a-z0-9-]{0,61}[a-z0-9])?(\.[a-z0-9]([a-z0-9-]{0,61}[a-z0-9])?)*$'
        if not re.match(domain_pattern, domain):
            raise ValueError("Invalid domain format")

        return domain


class VendorDomainUpdate(BaseModel):
    """Schema for updating vendor domain settings."""

    is_primary: Optional[bool] = Field(None, description="Set as primary domain")
    is_active: Optional[bool] = Field(None, description="Activate or deactivate domain")

    model_config = ConfigDict(from_attributes=True)


class VendorDomainResponse(BaseModel):
    """Standard schema for vendor domain response."""
    model_config = ConfigDict(from_attributes=True)

    id: int
    vendor_id: int
    domain: str
    is_primary: bool
    is_active: bool
    is_verified: bool
    ssl_status: str
    verification_token: Optional[str] = None
    verified_at: Optional[datetime] = None
    ssl_verified_at: Optional[datetime] = None
    created_at: datetime
    updated_at: datetime


class VendorDomainListResponse(BaseModel):
    """Schema for paginated vendor domain list."""

    domains: List[VendorDomainResponse]
    total: int


class DomainVerificationInstructions(BaseModel):
    """DNS verification instructions for domain ownership."""

    domain: str
    verification_token: str
    instructions: Dict[str, str]
    txt_record: Dict[str, str]
    common_registrars: Dict[str, str]

    model_config = ConfigDict(from_attributes=True)


class DomainVerificationResponse(BaseModel):
    """Response after domain verification."""

    message: str
    domain: str
    verified_at: datetime
    is_verified: bool


class DomainDeletionResponse(BaseModel):
    """Response after domain deletion."""

    message: str
    domain: str
    vendor_id: int