from sqlalchemy import Column, Integer, String, Boolean, DateTime, Date, Numeric, ForeignKey, func
from sqlalchemy.orm import relationship
from .database import Base

class Tenant(Base):
    __tablename__ = "tenants"

    id = Column(Integer, primary_key=True, index=True)
    slug = Column(String(64), unique=True, index=True, nullable=False)
    name = Column(String(150), nullable=False)
    subdomain = Column(String(100), unique=True, nullable=False)
    contact_email = Column(String(191), default="")
    is_active = Column(Boolean, default=True)
    created_at = Column(DateTime, default=func.now())

    products = relationship("Product", back_populates="tenant", cascade="all, delete-orphan")
    events = relationship("Event", back_populates="tenant", cascade="all, delete-orphan")
    orders = relationship("Order", back_populates="tenant", cascade="all, delete-orphan")
    users = relationship("User", back_populates="tenant", cascade="all, delete-orphan")


class User(Base):
    __tablename__ = "users"

    id = Column(Integer, primary_key=True, index=True)
    tenant_id = Column(Integer, ForeignKey("tenants.id", ondelete="CASCADE"), nullable=False)
    email = Column(String(191), nullable=False)
    username = Column(String(100), nullable=False)
    password_hash = Column(String(255), default="")
    first_name = Column(String(100), nullable=False)
    last_name = Column(String(100), nullable=False)
    role = Column(String(20), default="user")
    is_active = Column(Boolean, default=True)
    created_at = Column(DateTime, default=func.now())

    tenant = relationship("Tenant", back_populates="users")
    orders = relationship("Order", back_populates="user")


class Product(Base):
    __tablename__ = "products"

    id = Column(Integer, primary_key=True, index=True)
    tenant_id = Column(Integer, ForeignKey("tenants.id", ondelete="CASCADE"), nullable=False)
    name = Column(String(150), nullable=False)
    description = Column(String(255), default="")
    price = Column(Numeric(10, 2), nullable=False, default=0.00)
    unit = Column(String(50), default="Stück")
    is_active = Column(Boolean, default=True)
    sort_order = Column(Integer, default=0)

    tenant = relationship("Tenant", back_populates="products")


class Event(Base):
    __tablename__ = "events"

    id = Column(Integer, primary_key=True, index=True)
    tenant_id = Column(Integer, ForeignKey("tenants.id", ondelete="CASCADE"), nullable=False)
    title = Column(String(150), nullable=False)
    event_date = Column(Date, nullable=False)
    deadline = Column(DateTime, nullable=False)
    status = Column(String(20), default="open")  # 'open', 'closed', 'completed'
    created_at = Column(DateTime, default=func.now())

    tenant = relationship("Tenant", back_populates="events")
    orders = relationship("Order", back_populates="event", cascade="all, delete-orphan")


class Order(Base):
    __tablename__ = "orders"

    id = Column(Integer, primary_key=True, index=True)
    tenant_id = Column(Integer, ForeignKey("tenants.id", ondelete="CASCADE"), nullable=False)
    event_id = Column(Integer, ForeignKey("events.id", ondelete="CASCADE"), nullable=False)
    user_id = Column(Integer, ForeignKey("users.id", ondelete="CASCADE"), nullable=False)
    total_price = Column(Numeric(10, 2), nullable=False, default=0.00)
    is_paid = Column(Boolean, default=False)
    created_at = Column(DateTime, default=func.now())

    tenant = relationship("Tenant", back_populates="orders")
    event = relationship("Event", back_populates="orders")
    user = relationship("User", back_populates="orders")
    items = relationship("OrderItem", back_populates="order", cascade="all, delete-orphan")


class OrderItem(Base):
    __tablename__ = "order_items"

    id = Column(Integer, primary_key=True, index=True)
    order_id = Column(Integer, ForeignKey("orders.id", ondelete="CASCADE"), nullable=False)
    product_id = Column(Integer, ForeignKey("products.id", ondelete="RESTRICT"), nullable=False)
    quantity = Column(Integer, default=1, nullable=False)
    unit_price = Column(Numeric(10, 2), nullable=False)

    order = relationship("Order", back_populates="items")
    product = relationship("Product")