"""Transaction model for income/expense records"""

from sqlalchemy import Column, Integer, Float, String, DateTime, Boolean, ForeignKey, Text, Enum
from sqlalchemy.orm import relationship
from datetime import datetime
from enum import Enum as PyEnum
from app.db.database import Base


class TransactionType(str, PyEnum):
    """Types of transactions"""
    EXPENSE = "expense"
    INCOME = "income"
    TRANSFER = "transfer"


class Transaction(Base):
    """Transaction model - represents income/expense transaction"""

    __tablename__ = "transactions"

    id = Column(Integer, primary_key=True)
    family_id = Column(Integer, ForeignKey("families.id"), nullable=False, index=True)
    user_id = Column(Integer, ForeignKey("users.id"), nullable=False, index=True)
    account_id = Column(Integer, ForeignKey("accounts.id"), nullable=False, index=True)
    category_id = Column(Integer, ForeignKey("categories.id"), nullable=True)
    
    # Transaction details
    amount = Column(Float, nullable=False)
    transaction_type = Column(Enum(TransactionType), nullable=False)
    description = Column(String(500), nullable=True)
    notes = Column(Text, nullable=True)
    tags = Column(String(500), nullable=True)  # Comma-separated tags
    
    # Receipt
    receipt_photo_url = Column(String(500), nullable=True)
    
    # Recurring transaction
    is_recurring = Column(Boolean, default=False)
    recurrence_pattern = Column(String(50), nullable=True)  # daily, weekly, monthly, etc.
    
    # Status
    is_confirmed = Column(Boolean, default=True)
    
    # Timestamps
    transaction_date = Column(DateTime, nullable=False, index=True)
    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
    
    # Relationships
    family = relationship("Family")
    user = relationship("User", back_populates="transactions")
    account = relationship("Account", back_populates="transactions")
    category = relationship("Category", back_populates="transactions")

    def __repr__(self) -> str:
        return f"<Transaction(id={self.id}, amount={self.amount}, type={self.transaction_type})>"