from datetime import datetime

from sqlalchemy import Column, Integer, SmallInteger, String, DateTime, ForeignKey
from sqlalchemy.orm import relationship

from app import db


class User(db.Model):
    __tablename__ = "user"

    id = Column(Integer, primary_key=True)
    nickname = Column(String(25), unique=True, nullable=False)
    pronouns = Column(String(25), default="")
    volunteerwork = Column(String(4000), default="")
    freetext = Column(String(4000), default="")
    created = Column(DateTime, nullable=False)
    updated = Column(DateTime, onupdate=datetime.now, nullable=False)

    contacts = relationship("Contact")
    address = relationship("Address", uselist=False, back_populates="user")
    skills = relationship("UserSkill", back_populates="users")
    languages = relationship("UserLanguage", "users")


class Contact(db.Model):
    __tablename__ = "contact"

    id = Column(Integer, primary_key=True)
    user_id = Column(Integer, ForeignKey("user.id"))
    user = relationship("User", back_populates="contacts")
    contacttype_id = Column(Integer, ForeignKey("contacttype.id"))
    contacttype = relationship("ContactType")
    content = Column(String(200), nullable=False)


class ContactType(db.Model):
    __tablename__ = "contacttype"

    id = Column(Integer, primary_key=True)
    name = Column(String(25), nullable=False)


class Address(db.Model):
    __tablename__ = "address"

    id = Column(Integer, primary_key=True)
    street = Column(String(25), default="")
    house_number = Column(String(10), default="")
    additional = Column(String(25), default="")
    postcode = Column(String(10), default="")
    city = Column(String(25), default="")
    country = Column(String(25), default="")

    user_id = Column(Integer, ForeignKey("user.id"))
    user = relationship("User", back_populates="address")


class Skill(db.Model):
    __tablename__ = "skill"

    id = Column(Integer, primary_key=True)
    name = Column(String(25), unique=True, nullable=False)

    users = relationship("User", back_populates="skills")

    def to_dict(self):
        return {"id": self.id, "name": self.name}


class UserSkill(db.Model):
    __tablename__ = "user_skill"

    user_id = Column(Integer, ForeignKey("user.id"), primary_key=True)
    skill_id = Column(Integer, ForeignKey("skill.id"), primary_key=True)
    level = Column(SmallInteger)

    user = relationship("User", back_populates="skills")
    skill = relationship("Skill", back_populates="users")


class Language(db.Model):
    __tablename__ = "language"

    id = Column(String(2), primary_key=True)
    name = Column(String(25), nullable=False)

    users = relationship("UserLanguage", back_populates="languages")

    def to_dict(self):
        return {"id": self.id, "name": self.name}


class UserLanguage(db.Model):
    __tablename__ = "user_language"

    user_id = Column(Integer, ForeignKey("user.id"), primary_key=True)
    language_id = Column(Integer, ForeignKey("language.id"), primary_key=True)
    level = Column(SmallInteger)

    user = relationship("User", back_populates="languages")
    language = relationship("Language", back_populates="users")