from sqlalchemy import Column, Integer, String, Date, ForeignKey
from sqlalchemy.orm import relationship
from app.database import Base
from app.calculations import calculate_number_of_pucks, calculate_number_of_samples


class Shipment(Base):
    __tablename__ = "shipments"

    shipment_id = Column(String, primary_key=True, index=True)
    shipment_name = Column(String, index=True)
    shipment_date = Column(Date)
    shipment_status = Column(String)
    comments = Column(String(200), nullable=True)
    contact_person_id = Column(Integer, ForeignKey("contact_persons.id"))
    return_address_id = Column(Integer, ForeignKey("addresses.id"))
    proposal_id = Column(Integer, ForeignKey('proposals.id'), nullable=True)

    contact_person = relationship("ContactPerson", back_populates="shipments")
    return_address = relationship("Address", back_populates="shipments")
    proposal = relationship("Proposal", back_populates="shipments")
    dewars = relationship("Dewar", back_populates="shipment")


class ContactPerson(Base):
    __tablename__ = "contact_persons"

    id = Column(Integer, primary_key=True, index=True)
    firstname = Column(String)
    lastname = Column(String)
    phone_number = Column(String)
    email = Column(String)

    shipments = relationship("Shipment", back_populates="contact_person")


class Address(Base):
    __tablename__ = "addresses"

    id = Column(Integer, primary_key=True, index=True)
    street = Column(String)
    city = Column(String)
    zipcode = Column(String)
    country = Column(String)

    shipments = relationship("Shipment", back_populates="return_address")


class Dewar(Base):
    __tablename__ = "dewars"

    id = Column(String, primary_key=True, index=True)
    dewar_name = Column(String)
    tracking_number = Column(String)
    status = Column(String)
    ready_date = Column(Date, nullable=True)
    shipping_date = Column(Date, nullable=True)
    arrival_date = Column(Date, nullable=True)
    returning_date = Column(Date, nullable=True)
    qrcode = Column(String)
    shipment_id = Column(String, ForeignKey("shipments.shipment_id"))
    return_address_id = Column(Integer, ForeignKey("addresses.id"))
    contact_person_id = Column(Integer, ForeignKey("contact_persons.id"))

    shipment = relationship("Shipment", back_populates="dewars")
    return_address = relationship("Address")
    contact_person = relationship("ContactPerson")
    pucks = relationship("Puck", back_populates="dewar")

    @property
    def number_of_pucks(self) -> int:
        return calculate_number_of_pucks(self)

    @property
    def number_of_samples(self) -> int:
        return calculate_number_of_samples(self)


class Proposal(Base):
    __tablename__ = "proposals"

    id = Column(Integer, primary_key=True, index=True)
    number = Column(String)

    shipments = relationship("Shipment", back_populates="proposal")


class Puck(Base):
    __tablename__ = 'pucks'

    id = Column(String, primary_key=True)
    puck_name = Column(String)
    puck_type = Column(String)
    puck_location_in_dewar = Column(Integer)
    dewar_id = Column(String, ForeignKey('dewars.id'))  # Note: changed to String

    positions = relationship("Sample", back_populates="puck")
    dewar = relationship("Dewar", back_populates="pucks")


class Sample(Base):
    __tablename__ = 'samples'

    id = Column(Integer, primary_key=True)
    sample_name = Column(String)
    puck_id = Column(Integer, ForeignKey('pucks.id'))
    puck = relationship("Puck", back_populates="positions")