"""
PHONE CSV Importer
"""
from typing import Dict, List, Any
from sqlalchemy.orm import Session

from .base import BaseCSVImporter, ImportValidationError
from app.models.rolodex import Phone, Rolodex


class PhoneCSVImporter(BaseCSVImporter):
    """CSV importer for PHONE table"""
    
    @property
    def table_name(self) -> str:
        return "phone"
        
    @property
    def required_fields(self) -> List[str]:
        return ["rolodex_id", "phone"]  # rolodex_id and phone number are required
        
    @property
    def field_mapping(self) -> Dict[str, str]:
        """Map CSV headers to database field names"""
        return {
            "rolodex_id": "rolodex_id",
            "location": "location",
            "phone": "phone"
        }
        
    def create_model_instance(self, row_data: Dict[str, Any]) -> Phone:
        """Create a Phone instance from processed row data"""
        
        # Validate required fields
        if not row_data.get("rolodex_id"):
            raise ImportValidationError("Rolodex ID is required")
        if not row_data.get("phone"):
            raise ImportValidationError("Phone number is required")
            
        # Validate foreign key exists
        rolodex_exists = self.db_session.query(Rolodex).filter_by(
            id=row_data["rolodex_id"]
        ).first()
        if not rolodex_exists:
            raise ImportValidationError(f"Rolodex ID '{row_data['rolodex_id']}' does not exist")
            
        # Create instance with field length validation
        phone = Phone(
            rolodex_id=self.normalize_string(row_data["rolodex_id"], 80),
            location=self.normalize_string(row_data.get("location", ""), 45),
            phone=self.normalize_string(row_data["phone"], 45)
        )
        
        return phone