from main import db, app, ma
from sqlalchemy import Sequence
from sqlalchemy.exc import SQLAlchemyError

class Face(db.Model):
    __tablename__ = "face"
    id = db.Column(db.Integer, db.Sequence('face_id_seq'), primary_key=True )
    face = db.Column( db.LargeBinary )
    locn = db.Column( db.String )
    refimg_lnk = db.relationship("FaceRefimgLink", uselist=False, viewonly=True)
    facefile_lnk = db.relationship("FaceFileLink", uselist=False, viewonly=True)
    refimg =db.relationship("Refimg", secondary="face_refimg_link", uselist=False)

    def __repr__(self):
        return f"<id: {self.id}, face={self.face}, locn={self.locn}"

class FaceFileLink(db.Model):
    __tablename__ = "face_file_link"
    face_id = db.Column(db.Integer, db.ForeignKey("face.id"), primary_key=True )
    file_eid = db.Column(db.Integer, db.ForeignKey("file.eid"), primary_key=True )
    model_used = db.Column(db.Integer, db.ForeignKey("ai_model.id"), primary_key=True )

    def __repr__(self):
        return f"<face_id: {self.face_id}, file_eid={self.file_eid}, model_used: {self.model_used}"

class FaceRefimgLink(db.Model):
    __tablename__ = "face_refimg_link"
    face_id = db.Column(db.Integer, db.ForeignKey("face.id"), primary_key=True )
    refimg_id = db.Column(db.Integer, db.ForeignKey("refimg.id"), primary_key=True )
    face_distance = db.Column(db.Integer)

    def __repr__(self):
        return f"<face_id: {self.face_id}, refimg_id={self.refimg_id}, face_distance: {self.face_distance}"