"""Add agent config and run log tables: local_agent_configs, cloud_agent_configs, agent_run_logs.

Revision ID: 003
Revises: 002
Create Date: 2026-03-05
"""

from __future__ import annotations

from typing import Sequence, Union

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

revision: str = "003"
down_revision: Union[str, None] = "002"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    # ── Enum types — idempotent creation ──────────────────────────────────
    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 $$ BEGIN
            CREATE TYPE cloud_provider AS ENUM ('gmail', 'teams', 'outlook');
        EXCEPTION WHEN duplicate_object THEN NULL;
        END $$;
    """)

    # ── local_agent_configs ───────────────────────────────────────────────
    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("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 ───────────────────────────────────────────────
    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"])

    # ── agent_run_logs ─────────────────────────────────────────────────────
    op.create_table(
        "agent_run_logs",
        sa.Column("id", postgresql.UUID(as_uuid=False), nullable=False),
        # Plain string — not a FK because it references either local_agent_configs or
        # cloud_agent_configs depending on agent_type.
        sa.Column("agent_id", sa.String(255), nullable=False),
        sa.Column(
            "agent_type",
            postgresql.ENUM("local", "cloud", name="agent_type", create_type=False),
            nullable=False,
        ),
        sa.Column("user_id", postgresql.UUID(as_uuid=False), nullable=False),
        sa.Column(
            "status",
            postgresql.ENUM("running", "success", "error", "partial", name="agent_run_status", create_type=False),
            nullable=False,
            server_default="running",
        ),
        sa.Column("items_processed", sa.Integer, nullable=False, server_default="0"),
        sa.Column("items_created", sa.Integer, nullable=False, server_default="0"),
        sa.Column("errors", sa.JSON, nullable=True),
        sa.Column("started_at", sa.DateTime(timezone=True), nullable=False, server_default=sa.text("now()")),
        sa.Column("completed_at", sa.DateTime(timezone=True), nullable=True),
        sa.PrimaryKeyConstraint("id"),
        sa.ForeignKeyConstraint(["user_id"], ["users.id"], ondelete="CASCADE"),
    )
    op.create_index("ix_agent_run_logs_user_id", "agent_run_logs", ["user_id"])
    op.create_index("ix_agent_run_logs_agent_id", "agent_run_logs", ["agent_id"])


def downgrade() -> None:
    op.drop_table("agent_run_logs")
    op.drop_table("cloud_agent_configs")
    op.drop_table("local_agent_configs")

    op.execute("DROP TYPE IF EXISTS cloud_provider;")
    op.execute("DROP TYPE IF EXISTS agent_run_status;")
    op.execute("DROP TYPE IF EXISTS agent_type;")