"""Restore agent config tables and add agent_config column.

9a1f2d0b6c7e dropped local_agent_configs and cloud_agent_configs, but both
ORM models are still active. This migration recreates them with agent_config
added to local_agent_configs.

Revision ID: a3b9c0d1e2f3
Revises: 9a1f2d0b6c7e
Create Date: 2026-04-07 00:00:00.000000

"""
from __future__ import annotations

from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op
from sqlalchemy.dialects import postgresql


# revision identifiers, used by Alembic.
revision: str = "a3b9c0d1e2f3"
down_revision: Union[str, None] = "9a1f2d0b6c7e"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    # Recreate enum types (idempotent — they may already exist from migration 003)
    op.execute("""
        DO $$ BEGIN
            CREATE TYPE agent_type AS ENUM ('local', 'cloud');
        EXCEPTION WHEN duplicate_object THEN NULL;
        END $$;
    """)
    op.execute("""
        DO $$ BEGIN
            CREATE TYPE agent_run_status AS ENUM ('running', 'success', 'error', 'partial');
        EXCEPTION WHEN duplicate_object THEN NULL;
        END $$;
    """)
    op.execute("""
        DO $$ BEGIN
            CREATE TYPE cloud_provider AS ENUM ('gmail', 'teams', 'outlook');
        EXCEPTION WHEN duplicate_object THEN NULL;
        END $$;
    """)

    bind = op.get_bind()
    inspector = sa.inspect(bind)
    existing = set(inspector.get_table_names())

    # ── local_agent_configs (with agent_config column) ────────────────────
    if "local_agent_configs" not in existing:
        op.create_table(
            "local_agent_configs",
            sa.Column("id", postgresql.UUID(as_uuid=False), nullable=False),
            sa.Column("user_id", postgresql.UUID(as_uuid=False), nullable=False),
            sa.Column("device_id", sa.String(255), nullable=False),
            sa.Column("name", sa.String(255), nullable=False),
            sa.Column("directory_paths", sa.JSON, nullable=False, server_default="[]"),
            sa.Column("data_types", sa.JSON, nullable=False, server_default="[]"),
            sa.Column("prompt_template", sa.Text, nullable=False, server_default=""),
            sa.Column("agent_config", sa.JSON, nullable=True),
            sa.Column("file_extensions", sa.JSON, nullable=False, server_default="[]"),
            sa.Column("schedule_cron", sa.String(100), nullable=False, server_default="0 */6 * * *"),
            sa.Column("enabled", sa.Boolean, nullable=False, server_default=sa.true()),
            sa.Column("last_run_at", sa.DateTime(timezone=True), nullable=True),
            sa.Column("created_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.text("now()")),
            sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.text("now()")),
            sa.PrimaryKeyConstraint("id"),
            sa.ForeignKeyConstraint(["user_id"], ["users.id"], ondelete="CASCADE"),
        )
        op.create_index("ix_local_agent_configs_user_id", "local_agent_configs", ["user_id"])

    # ── cloud_agent_configs ───────────────────────────────────────────────
    if "cloud_agent_configs" not in existing:
        op.create_table(
            "cloud_agent_configs",
            sa.Column("id", postgresql.UUID(as_uuid=False), nullable=False),
            sa.Column("user_id", postgresql.UUID(as_uuid=False), nullable=False),
            sa.Column(
                "provider",
                postgresql.ENUM("gmail", "teams", "outlook", name="cloud_provider", create_type=False),
                nullable=False,
            ),
            sa.Column("name", sa.String(255), nullable=False),
            sa.Column("data_types", sa.JSON, nullable=False, server_default="[]"),
            sa.Column("prompt_template", sa.Text, nullable=False, server_default=""),
            sa.Column("oauth_token_encrypted", sa.Text, nullable=True),
            sa.Column("filter_config", sa.JSON, nullable=True),
            sa.Column("schedule_cron", sa.String(100), nullable=False, server_default="0 */6 * * *"),
            sa.Column("enabled", sa.Boolean, nullable=False, server_default=sa.true()),
            sa.Column("last_run_at", sa.DateTime(timezone=True), nullable=True),
            sa.Column("created_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.text("now()")),
            sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.text("now()")),
            sa.PrimaryKeyConstraint("id"),
            sa.ForeignKeyConstraint(["user_id"], ["users.id"], ondelete="CASCADE"),
        )
        op.create_index("ix_cloud_agent_configs_user_id", "cloud_agent_configs", ["user_id"])


def downgrade() -> None:
    op.drop_index("ix_cloud_agent_configs_user_id", table_name="cloud_agent_configs")
    op.drop_table("cloud_agent_configs")
    op.drop_index("ix_local_agent_configs_user_id", table_name="local_agent_configs")
    op.drop_table("local_agent_configs")