from sqlalchemy import Column, Integer, String, Float, DateTime, ForeignKey, Text
from sqlalchemy.orm import relationship
from sqlalchemy.ext.declarative import as_declarative, declared_attr
from sqlalchemy.sql import func
from pydantic import BaseModel
from typing import Optional

@as_declarative()
class Base:
    @declared_attr
    def __tablename__(cls):
        return cls.__name__.lower()

    # Automatically apply nullable=False to ForeignKey columns unless explicitly set
    @staticmethod
    def Column(*args, **kwargs):
        if any(isinstance(arg, ForeignKey) for arg in args) and 'nullable' not in kwargs:
            kwargs['nullable'] = False
        return Column(*args, **kwargs)

# Enum for User Role
from sqlalchemy import Enum
from enum import Enum as PyEnum

class UserRole(PyEnum):
    PRIVATE = "PRIVATE"
    BUSINESS = "BUSINESS"

# User model
class User(Base):
    __tablename__ = 'users'
    id = Column(Integer, primary_key=True, autoincrement=True)
    name = Column(String, nullable=False)
    company = Column(String, nullable=True)
    address = Column(String, nullable=False)
    postcode = Column(Integer, nullable=False)
    city = Column(String, nullable=False)
    latitude = Column(String, nullable=True)
    longitude = Column(String, nullable=True)
    phone = Column(String, nullable=False)
    privatePhone = Column(String, nullable=True)
    email = Column(String, unique=True, nullable=False)
    cvr = Column(String, nullable=True)
    password = Column(String, nullable=False)
    role = Column(Enum(UserRole), default=UserRole.PRIVATE)
    updatedAt = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
    createdAt = Column(DateTime(timezone=True), server_default=func.now())

    auctions = relationship('Auction', back_populates='user')
    accounts = relationship('Account', back_populates='user')
    sessions = relationship('Session', back_populates='user')
    bids = relationship('Bid', back_populates='user')

# Vehicle model
class Vehicle(Base):
    __tablename__ = 'vehicles'
    id = Column(Integer, primary_key=True, autoincrement=True)
    brand = Column(String, nullable=False)
    model = Column(String, nullable=False)
    variant = Column(String, nullable=True)
    year = Column(Integer, nullable=False)
    kilometers = Column(Integer, nullable=False)
    condition = Column(String, nullable=False)
    location = Column(String, nullable=False)
    latitude = Column(String, nullable=True)
    longitude = Column(String, nullable=True)
    gasType = Column(String, nullable=False)
    images = Column(Text, nullable=False)  # Store image paths or references
    description = Column(String, nullable=False)
    service = Column(String, nullable=False)
    inspectedAt = Column(DateTime(timezone=True), nullable=True)
    updatedAt = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
    createdAt = Column(DateTime(timezone=True), server_default=func.now())

    auctions = relationship('Auction', back_populates='vehicle')
    equipment = relationship('VehicleEquipment', back_populates='vehicle')

# Equipment model
class Equipment(Base):
    __tablename__ = 'equipment'
    id = Column(Integer, primary_key=True, autoincrement=True)
    name = Column(String, nullable=False)

    vehicles = relationship('VehicleEquipment', back_populates='equipment')

# Vehicle-Equipment association table
class VehicleEquipment(Base):
    __tablename__ = 'vehicle_equipment'
    vehicle_id = Column(Integer, ForeignKey('vehicles.id'), primary_key=True)
    equipment_id = Column(Integer, ForeignKey('equipment.id'), primary_key=True)

    vehicle = relationship('Vehicle', back_populates='equipment')
    equipment = relationship('Equipment', back_populates='vehicles')

# Auction model
class Auction(Base):
    __tablename__ = 'auctions'
    id = Column(Integer, primary_key=True, autoincrement=True)
    vehicleId = Column(Integer, ForeignKey('vehicles.id'), nullable=False)
    userId = Column(Integer, ForeignKey('users.id'), nullable=False)
    askingPrice = Column(Float, nullable=False)
    description = Column(String, nullable=True)
    updatedAt = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
    createdAt = Column(DateTime(timezone=True), server_default=func.now())

    user = relationship('User', back_populates='auctions')
    vehicle = relationship('Vehicle', back_populates='auctions')
    bids = relationship('Bid', back_populates='auction')

# Bid model
class Bid(Base):
    __tablename__ = 'bids'
    id = Column(Integer, primary_key=True, autoincrement=True)
    auctionId = Column(Integer, ForeignKey('auctions.id'), nullable=False)
    userId = Column(Integer, ForeignKey('users.id'), nullable=False)
    bid = Column(Float, nullable=False)
    updatedAt = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
    createdAt = Column(DateTime(timezone=True), server_default=func.now())

    auction = relationship('Auction', back_populates='bids')
    user = relationship('User', back_populates='bids')

# Account model
class Account(Base):
    __tablename__ = 'accounts'
    id = Column(Integer, primary_key=True, autoincrement=True)
    userId = Column(Integer, ForeignKey('users.id'), nullable=False)
    type = Column(String, nullable=False)
    provider = Column(String, nullable=False)
    providerAccountId = Column(String, nullable=False)
    refresh_token = Column(String, nullable=True)
    access_token = Column(String, nullable=True)
    expires_at = Column(Integer, nullable=True)

    user = relationship('User', back_populates='accounts')

# Session model
class Session(Base):
    __tablename__ = 'sessions'
    id = Column(Integer, primary_key=True, autoincrement=True)
    sessionToken = Column(String, unique=True, nullable=False)
    userId = Column(Integer, ForeignKey('users.id'))
    expires = Column(DateTime, nullable=False)

    user = relationship('User', back_populates='sessions')

# VerificationToken model
class VerificationToken(Base):
    __tablename__ = 'verification_tokens'
    identifier = Column(String, primary_key=True)
    token = Column(String, unique=True, nullable=False)
    expires = Column(DateTime, nullable=False)

# Pydantic model for user registration
class UserCreate(BaseModel):
    email: str
    password: str
    name: str
    phone: str
    address: str
    postcode: int
    city: str
    role: str
    company: Optional[str] = None
    privatePhone: Optional[str] = None
    cvr: Optional[str] = None

class UserLogin(BaseModel):
    email: str
    password: str