from pydantic import BaseModel, Field
from sqlalchemy.orm import Mapped, mapped_column, relationship, Session
from sqlalchemy import Integer, Enum, ForeignKey, VARCHAR
from enum import Enum as PyEnum
from app.models.base_class import Base

class OnlineStoreFormatBase(BaseModel):
    online_id : int | None = Field(default=None)
    metric : str | None = Field(default=None)
    y1_y2 : int | None = Field(default=None)
    y3_y4 : int | None = Field(default=None)
    y5_y6 : int | None = Field(default=None)
    group_id : int | None = Field(default=None)

class MetricEnum(PyEnum):
    INVESTMENT_AND_CAPITAL_EXPENSES = "Investment & Capital Expenses"
    NUMBER_OF_TRANSACTIONS = "Number of Transactions"
    AVERAGE_TRANSACTION_VALUE = "Average Transaction Value"
    
class TblOnlineStoreFormat(Base):
    __tablename__ = "tbl_online_store_format"
    online_id : Mapped[int] = mapped_column("online_id", Integer, primary_key=True, autoincrement=True)
    metric : Mapped[str] = mapped_column("metric", VARCHAR(255), Enum(MetricEnum))
    y1_y2 : Mapped[int] = mapped_column("y1_y2", Integer, nullable=True, server_default=None)
    y3_y4 : Mapped[int] = mapped_column("y3_y4", Integer, nullable=True, server_default=None)
    y5_y6 : Mapped[int] = mapped_column("y5_y6", Integer, nullable=True, server_default=None)
    group_id : Mapped[int] = mapped_column("group_id", ForeignKey("tbl_group.group_id"))
    
    group = relationship("TblGroup", back_populates="online_store_format")
    
    @classmethod
    def create(cls, data:OnlineStoreFormatBase, db:Session) ->"TblOnlineStoreFormat":
        create_data = cls(**data.model_dump())
        db.add(create_data)
        db.flush()
        return create_data
    
    @classmethod
    def get(cls, group_id:int, db:Session) ->"TblOnlineStoreFormat":
        get_data = db.query(cls).filter(cls.group_id == group_id).all()
        return get_data
    
    @classmethod
    def update(cls, online_id:int, data:OnlineStoreFormatBase, db:Session) ->"TblOnlineStoreFormat":
        update_data = db.query(cls).filter(cls.online_id == online_id).first()
        data_dict = data.model_dump()
        for key, value in data_dict.items():
            if value is not None:
                setattr(update_data, key, value)
        db.commit()
        db.refresh(update_data)
        return update_data
    
    @classmethod
    def delete(cls, online_id:int, db:Session) ->"TblOnlineStoreFormat":
        delete_data = db.query(cls).filter(cls.online_id == online_id).first()
        if not delete_data:
            return False
        db.delete(delete_data)
        db.commit()
        return True