from datetime import datetime
from enum import Enum
from sqlalchemy import String, Text, DateTime, ForeignKey, Integer
from sqlalchemy.orm import Mapped, mapped_column, relationship
from typing import TYPE_CHECKING

from app.core.database import Base

if TYPE_CHECKING:
    from app.models.user import User


class CoinTransactionType(str, Enum):
    CHALLENGE_COMPLETE = "challenge_complete"
    PLAYTHROUGH_COMPLETE = "playthrough_complete"
    MARATHON_WIN = "marathon_win"
    MARATHON_PLACE = "marathon_place"
    COMMON_ENEMY_BONUS = "common_enemy_bonus"
    PURCHASE = "purchase"
    REFUND = "refund"
    ADMIN_GRANT = "admin_grant"
    ADMIN_DEDUCT = "admin_deduct"


class CoinTransaction(Base):
    __tablename__ = "coin_transactions"

    id: Mapped[int] = mapped_column(primary_key=True)
    user_id: Mapped[int] = mapped_column(ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True)
    amount: Mapped[int] = mapped_column(Integer, nullable=False)
    transaction_type: Mapped[str] = mapped_column(String(30), nullable=False)
    reference_type: Mapped[str | None] = mapped_column(String(30), nullable=True)
    reference_id: Mapped[int | None] = mapped_column(Integer, nullable=True)
    description: Mapped[str | None] = mapped_column(Text, nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)

    # Relationships
    user: Mapped["User"] = relationship(
        "User",
        back_populates="coin_transactions"
    )