"""SQLAlchemy ORM table definitions for activity-core.

These are the persistence-layer counterparts to the Pydantic domain models in
models.py.  Alembic reads Base.metadata (imported via db.py) for autogenerate.
"""

from __future__ import annotations

import uuid
from datetime import datetime

from sqlalchemy import (
    Boolean,
    DateTime,
    ForeignKey,
    Integer,
    Text,
    func,
)
from sqlalchemy.dialects.postgresql import JSONB, UUID
from sqlalchemy.orm import Mapped, mapped_column

from activity_core.db import Base


class ActivityDefinition(Base):
    __tablename__ = "activity_definitions"

    id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    name: Mapped[str] = mapped_column(Text, nullable=False)
    enabled: Mapped[bool] = mapped_column(Boolean, nullable=False, default=True)
    trigger_type: Mapped[str] = mapped_column(Text, nullable=False)
    trigger_config: Mapped[dict] = mapped_column(JSONB, nullable=False)
    context_sources: Mapped[list] = mapped_column(JSONB, nullable=False, default=list)
    task_templates: Mapped[list] = mapped_column(JSONB, nullable=False, default=list)
    dedupe_key_strategy: Mapped[str] = mapped_column(
        Text, nullable=False, default="skip"
    )
    version: Mapped[int] = mapped_column(Integer, nullable=False, default=1)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True),
        nullable=False,
        server_default=func.now(),
        onupdate=func.now(),
    )


class ActivityRun(Base):
    __tablename__ = "activity_runs"

    run_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    activity_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("activity_definitions.id", ondelete="RESTRICT"),
        nullable=False,
        index=True,
    )
    scheduled_for: Mapped[datetime | None] = mapped_column(
        DateTime(timezone=True), nullable=True
    )
    fired_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )
    context_snapshot: Mapped[dict] = mapped_column(
        JSONB, nullable=False, default=dict
    )
    tasks_spawned: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
    version_used: Mapped[int] = mapped_column(Integer, nullable=False)


class TaskInstance(Base):
    __tablename__ = "task_instances"

    id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    run_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("activity_runs.run_id", ondelete="CASCADE"),
        nullable=False,
        index=True,
    )
    type: Mapped[str] = mapped_column(Text, nullable=False)
    params: Mapped[dict] = mapped_column(JSONB, nullable=False, default=dict)
    status: Mapped[str] = mapped_column(Text, nullable=False, default="pending")
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )