"""Task model for the Tasks plugin."""

from __future__ import annotations

import uuid
from datetime import datetime

from sqlalchemy import DateTime, ForeignKey, Index, String, Text
from sqlalchemy.dialects.postgresql import UUID as PGUUID
from sqlalchemy.orm import Mapped, mapped_column

from app.core.db import Base, TenantMixin


class Task(Base, TenantMixin):
    """Task entity — free activities (calls, notes, visits) linked to contacts."""

    __tablename__ = "tasks"
    __table_args__ = (
        Index("ix_tasks_tenant_deleted", "tenant_id", "deleted_at"),
        Index("ix_tasks_tenant_status", "tenant_id", "status"),
        Index("ix_tasks_tenant_assigned", "tenant_id", "assigned_to"),
        Index("ix_tasks_tenant_due", "tenant_id", "due_date"),
        Index("ix_tasks_contact", "contact_id"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    title: Mapped[str] = mapped_column(String(255), nullable=False)
    description: Mapped[str | None] = mapped_column(Text, nullable=True)
    status: Mapped[str] = mapped_column(
        String(20), nullable=False, default="open"
    )  # open, in_progress, done
    priority: Mapped[str] = mapped_column(
        String(10), nullable=False, default="medium"
    )  # low, medium, high, urgent
    due_date: Mapped[datetime | None] = mapped_column(
        DateTime(timezone=True), nullable=True
    )
    assigned_to: Mapped[uuid.UUID | None] = mapped_column(
        PGUUID(as_uuid=True), ForeignKey("users.id", ondelete="SET NULL"), nullable=True
    )
    contact_id: Mapped[uuid.UUID | None] = mapped_column(
        PGUUID(as_uuid=True), ForeignKey("contacts.id", ondelete="SET NULL"), nullable=True
    )
    created_by: Mapped[uuid.UUID | None] = mapped_column(
        PGUUID(as_uuid=True), ForeignKey("users.id", ondelete="SET NULL"), nullable=True
    )