import uuid
from datetime import date, datetime
from sqlalchemy import String, Text, Date, DateTime, Boolean, func, ForeignKey
from sqlalchemy.orm import Mapped, mapped_column, relationship
from sqlalchemy.dialects.postgresql import UUID
from app.database import Base


class Customer(Base):
    __tablename__ = "customers"

    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    name: Mapped[str] = mapped_column(String(200), index=True)
    customer_type: Mapped[str] = mapped_column(String(20), default="unit")
    industry: Mapped[str] = mapped_column(String(100), default="")
    address: Mapped[str] = mapped_column(String(500), default="")
    in_use_services: Mapped[str] = mapped_column(Text, default="")
    monthly_fee: Mapped[str] = mapped_column(String(100), default="")
    remarks: Mapped[str] = mapped_column(Text, default="")
    created_by: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"))
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
    updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
    last_visit_date: Mapped[date | None] = mapped_column(Date, nullable=True)
    last_visit_manager_id: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=True)

    contacts: Mapped[list["CustomerContact"]] = relationship("CustomerContact", back_populates="customer", cascade="all, delete-orphan")
    assignments: Mapped[list["CustomerAssignment"]] = relationship("CustomerAssignment", back_populates="customer", cascade="all, delete-orphan")