from sqlalchemy import Column, Integer, String, Boolean, Text, DateTime, ForeignKey, UniqueConstraint
from sqlalchemy.dialects.postgresql import JSONB
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func
from app.database import Base


class Service(Base):
    __tablename__ = "services"

    id = Column(Integer, primary_key=True)
    name = Column(Text, nullable=False)
    slug = Column(Text, nullable=False, unique=True)
    duration_min = Column(Integer, nullable=False, default=15)
    description = Column(Text)
    category = Column(Text, default="generale")
    active = Column(Boolean, default=True)
    sort_order = Column(Integer, default=0)
    created_at = Column(DateTime(timezone=True), server_default=func.now())

    provider_services = relationship("ProviderService", back_populates="service")
    bookings = relationship("Booking", back_populates="service")


class Provider(Base):
    __tablename__ = "providers"

    id = Column(Integer, primary_key=True)
    name = Column(Text, nullable=False)
    email = Column(Text)
    phone = Column(Text)
    google_calendar_id = Column(Text)
    active = Column(Boolean, default=True)
    created_at = Column(DateTime(timezone=True), server_default=func.now())

    provider_services = relationship("ProviderService", back_populates="provider")
    bookings = relationship("Booking", back_populates="provider")


class ProviderService(Base):
    __tablename__ = "provider_services"
    __table_args__ = (UniqueConstraint("provider_id", "service_id"),)

    id = Column(Integer, primary_key=True)
    provider_id = Column(Integer, ForeignKey("providers.id", ondelete="CASCADE"))
    service_id = Column(Integer, ForeignKey("services.id", ondelete="CASCADE"))
    availability_rules = Column(JSONB, nullable=False, default=[])

    provider = relationship("Provider", back_populates="provider_services")
    service = relationship("Service", back_populates="provider_services")


class Booking(Base):
    __tablename__ = "bookings"

    id = Column(Integer, primary_key=True)
    service_id = Column(Integer, ForeignKey("services.id"))
    provider_id = Column(Integer, ForeignKey("providers.id"))
    customer_name = Column(Text, nullable=False)
    customer_phone = Column(Text, nullable=False)
    customer_email = Column(Text)
    start_at = Column(DateTime(timezone=True), nullable=False)
    end_at = Column(DateTime(timezone=True), nullable=False)
    status = Column(Text, default="confirmed")
    google_event_id = Column(Text)
    notes = Column(Text)
    reminder_sent = Column(Boolean, default=False)
    created_at = Column(DateTime(timezone=True), server_default=func.now())

    service = relationship("Service", back_populates="bookings")
    provider = relationship("Provider", back_populates="bookings")