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

class GrossMarginContributionBase(BaseModel):
    gross_id : int | None = Field(default=None)
    category_name  : str | None = Field(default=None)
    contribution_to_total_sales :float | None = Field(default=None)
    contribution_to_gross_margin : float | None = Field(default=None)
    rationale  : str | None = Field(default=None)
    group_id : int | None = Field(default=None)

class TblGrossMarginContribution(Base):
    __tablename__ = "tbl_gross_margin_contribution"
    gross_id : Mapped[int] = mapped_column("gross_id", Integer, primary_key=True, autoincrement=True)
    category_name : Mapped[str] = mapped_column("category_name", VARCHAR(255), nullable=True, server_default=None)
    contribution_to_total_sales : Mapped[float] = mapped_column("contribution_to_total_sales", Float, nullable=False, server_default=None)
    contribution_to_gross_margin : Mapped[float] = mapped_column("contribution_to_gross_margin", Float, nullable=False, server_default=None)
    rationale  : Mapped[str] = mapped_column("rationale", VARCHAR(255), nullable=True, server_default=None)
    group_id : Mapped[int] = mapped_column("group_id", Integer, ForeignKey("tbl_group.group_id"))
    
    group = relationship("TblGroup", back_populates="gross_margin_contribution")
    
    # # float value convert to percentage
    # @classmethod
    # def perccentage(cls, obj):
    #     return cls(contribution_to_total_sales=f"{obj.contribution_to_total_sales * 100:.2f}%", contribution_to_gross_margin=f"{obj.contribution_to_gross_margin * 100:.2f}%")
    
    @classmethod
    def create_gross_margin_contribution(cls, data:GrossMarginContributionBase, db:Session) ->"TblGrossMarginContribution":
        data_dict = data.model_dump()
        new_data = cls(**data_dict)
        db.add(new_data)
        db.flush()
        return new_data
    
    @classmethod
    def get_gross_margin_contribution(cls, gross_margin_get_id:int, db:Session) ->"TblGrossMarginContribution":
        get_data = db.query(cls).filter(cls.gross_id == gross_margin_get_id).first()
        return get_data
    
    @classmethod
    def update_gross_margin_contribution(cls, gross_margin_update_id:int, data:GrossMarginContributionBase, db:Session) ->"TblGrossMarginContribution":
        update_data = db.query(cls).filter(cls.gross_id == gross_margin_update_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_gross_margin_contribution(cls, gross_id:int, db:Session) ->"TblGrossMarginContribution":
        delete_data = db.query(cls).filter(cls.gross_id == gross_id).first()
        if not delete_data:
            return False
        db.delete(delete_data)
        db.commit()
        return True