"""Alembic generic migration script."""
"""
Revision ID: 0001
Revises:
Create Date: 2025-01-01
"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa

revision: str = "0001"
down_revision: Union[str, None] = None
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "agents",
        sa.Column("id", sa.Integer, primary_key=True, autoincrement=True),
        sa.Column("name", sa.String(128), unique=True, nullable=False),
        sa.Column("description", sa.Text, default=""),
        sa.Column("api_key", sa.String(128), unique=True),
        sa.Column("status", sa.String(32), default="active"),
        sa.Column("last_heartbeat_at", sa.DateTime, nullable=True),
        sa.Column("created_at", sa.DateTime, server_default=sa.func.now()),
        sa.Column("updated_at", sa.DateTime, server_default=sa.func.now()),
    )

    op.create_table(
        "notification_channels",
        sa.Column("id", sa.Integer, primary_key=True, autoincrement=True),
        sa.Column("name", sa.String(128), nullable=False),
        sa.Column("channel_type", sa.String(32), nullable=False),
        sa.Column("config", sa.Text, nullable=False),
        sa.Column("enabled", sa.Boolean, default=True),
        sa.Column("created_at", sa.DateTime, server_default=sa.func.now()),
        sa.Column("updated_at", sa.DateTime, server_default=sa.func.now()),
    )

    op.create_table(
        "scheduled_tasks",
        sa.Column("id", sa.Integer, primary_key=True, autoincrement=True),
        sa.Column("agent_id", sa.Integer, sa.ForeignKey("agents.id", ondelete="CASCADE"), nullable=False),
        sa.Column("name", sa.String(256), nullable=False),
        sa.Column("description", sa.Text, default=""),
        sa.Column("cron_expression", sa.String(64), nullable=False),
        sa.Column("grace_period", sa.Integer, default=300),
        sa.Column("status", sa.String(32), default="active"),
        sa.Column("last_run_at", sa.DateTime, nullable=True),
        sa.Column("last_run_result", sa.String(32), nullable=True),
        sa.Column("next_run_at", sa.DateTime, nullable=True),
        sa.Column("total_run_count", sa.Integer, default=0),
        sa.Column("created_at", sa.DateTime, server_default=sa.func.now()),
        sa.Column("updated_at", sa.DateTime, server_default=sa.func.now()),
    )

    op.create_table(
        "task_executions",
        sa.Column("id", sa.Integer, primary_key=True, autoincrement=True),
        sa.Column("task_id", sa.Integer, sa.ForeignKey("scheduled_tasks.id", ondelete="CASCADE"), nullable=False),
        sa.Column("agent_id", sa.Integer, sa.ForeignKey("agents.id", ondelete="CASCADE"), nullable=False),
        sa.Column("status", sa.String(32), default="running"),
        sa.Column("started_at", sa.DateTime, server_default=sa.func.now()),
        sa.Column("finished_at", sa.DateTime, nullable=True),
        sa.Column("duration_ms", sa.Integer, nullable=True),
        sa.Column("result", sa.Text, nullable=True),
        sa.Column("log", sa.Text, nullable=True),
        sa.Column("error_message", sa.Text, nullable=True),
        sa.Column("created_at", sa.DateTime, server_default=sa.func.now()),
    )

    op.create_table(
        "alert_rules",
        sa.Column("id", sa.Integer, primary_key=True, autoincrement=True),
        sa.Column("task_id", sa.Integer, sa.ForeignKey("scheduled_tasks.id", ondelete="CASCADE"), nullable=False),
        sa.Column("channel_id", sa.Integer, sa.ForeignKey("notification_channels.id", ondelete="CASCADE"), nullable=False),
        sa.Column("alert_type", sa.String(32), default="missed_run"),
        sa.Column("enabled", sa.Boolean, default=True),
        sa.Column("created_at", sa.DateTime, server_default=sa.func.now()),
    )

    op.create_table(
        "alerts",
        sa.Column("id", sa.Integer, primary_key=True, autoincrement=True),
        sa.Column("task_id", sa.Integer, sa.ForeignKey("scheduled_tasks.id", ondelete="SET NULL"), nullable=True),
        sa.Column("alert_type", sa.String(32), nullable=False),
        sa.Column("message", sa.Text, nullable=False),
        sa.Column("status", sa.String(32), default="pending"),
        sa.Column("acknowledged_at", sa.DateTime, nullable=True),
        sa.Column("created_at", sa.DateTime, server_default=sa.func.now()),
    )

    op.create_table(
        "system_config",
        sa.Column("key", sa.String(128), primary_key=True),
        sa.Column("value", sa.Text, nullable=False),
        sa.Column("description", sa.String(256), default=""),
        sa.Column("updated_at", sa.DateTime, server_default=sa.func.now()),
    )

    op.create_table(
        "users",
        sa.Column("id", sa.Integer, primary_key=True, autoincrement=True),
        sa.Column("username", sa.String(64), unique=True, nullable=False),
        sa.Column("password_hash", sa.String(256), nullable=False),
        sa.Column("display_name", sa.String(128), default=""),
        sa.Column("email", sa.String(128), default=""),
        sa.Column("is_active", sa.Boolean, default=True),
        sa.Column("created_at", sa.DateTime, server_default=sa.func.now()),
        sa.Column("updated_at", sa.DateTime, server_default=sa.func.now()),
    )


def downgrade() -> None:
    op.drop_table("users")
    op.drop_table("system_config")
    op.drop_table("alerts")
    op.drop_table("alert_rules")
    op.drop_table("task_executions")
    op.drop_table("scheduled_tasks")
    op.drop_table("notification_channels")
    op.drop_table("agents")