from sqlalchemy import Column, String, Integer, Float, DateTime, Text, ForeignKey
from sqlalchemy.orm import relationship
from datetime import datetime
from app.core.database.db_session import Base

class POSTerminal(Base):
    __tablename__ = "pos_terminals"
    __bind_key__ = "commerce"

    terminal_id = Column(String(50), primary_key=True)
    store_name = Column(String(150), nullable=False)
    status = Column(String(20), default="ONLINE")  # ONLINE, IDLE, OFFLINE
    ip_address = Column(String(45), nullable=True)
    last_heartbeat = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
    synced_today = Column(Integer, default=0)
    pending_queue = Column(Integer, default=0)
    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

    logs = relationship("POSTransactionLog", back_populates="terminal", cascade="all, delete-orphan")


class POSTransactionLog(Base):
    __tablename__ = "pos_transaction_logs"
    __bind_key__ = "commerce"

    sync_id = Column(String(50), primary_key=True)
    terminal_id = Column(String(50), ForeignKey("pos_terminals.terminal_id"), nullable=False)
    invoice_no = Column(String(100), nullable=False, index=True)
    pos_transaction_id = Column(String(100), nullable=False, index=True)
    items_count = Column(Integer, default=1)
    total_amount = Column(Float, default=0.0)
    status = Column(String(20), default="SYNCED")  # SYNCED, FAILED, PENDING_RETRY
    error_detail = Column(Text, nullable=True)
    created_at = Column(DateTime, default=datetime.utcnow, index=True)

    terminal = relationship("POSTerminal", back_populates="logs")