import enum
from uuid import uuid4

from sqlalchemy import JSON, Column, DateTime, Enum, Float, ForeignKey, String
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func

from app.core.database import Base


class PaymentStatus(enum.Enum):
    PENDING = "pending"
    PROCESSING = "processing"
    COMPLETED = "completed"
    FAILED = "failed"
    REFUNDED = "refunded"

class PaymentMethod(enum.Enum):
    CREDIT_CARD = "credit_card"
    PAYPAL = "paypal"
    BANK_TRANSFER = "bank_transfer"
    CASH_ON_DELIVERY = "cash_on_delivery"
    STRIPE = "stripe"
    APPLE_PAY = "apple_pay"
    GOOGLE_PAY = "google_pay"

class Payment(Base):
    __tablename__ = "payments"

    id = Column(String(36), primary_key=True, default=lambda: str(uuid4()))
    order_id = Column(String(36), ForeignKey("orders.id"), nullable=False)
    amount = Column(Float, nullable=False)
    payment_method = Column(Enum(PaymentMethod), nullable=False)
    status = Column(Enum(PaymentStatus), default=PaymentStatus.PENDING)
    transaction_id = Column(String(255), nullable=True, unique=True)
    payment_details = Column(JSON, nullable=True)  # JSON with payment provider details
    error_message = Column(String(512), nullable=True)
    created_at = Column(DateTime(timezone=True), server_default=func.now())
    updated_at = Column(DateTime(timezone=True), onupdate=func.now())

    # Relationships
    order = relationship("Order", back_populates="payments")

    def __repr__(self):
        return f"<Payment {self.id} for Order {self.order_id}>"