"""Desktop execution agent (Phase 0): devices, device_events, codegen_runs exec fields.

Revision ID: 082
Revises: 081
"""
from typing import Sequence, Union

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

revision: str = "082"
down_revision: Union[str, None] = "081"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "devices",
        sa.Column("id", postgresql.UUID(as_uuid=True), primary_key=True),
        # Unset until pairing is approved.
        sa.Column(
            "workspace_id",
            postgresql.UUID(as_uuid=True),
            sa.ForeignKey("workspaces.id", ondelete="CASCADE"),
            nullable=True,
        ),
        sa.Column(
            "user_id",
            postgresql.UUID(as_uuid=True),
            sa.ForeignKey("users.id", ondelete="SET NULL"),
            nullable=True,
        ),
        sa.Column("name", sa.String(100), nullable=True),
        sa.Column("hostname", sa.String(255), nullable=True),
        sa.Column("os", sa.String(20), nullable=True),
        sa.Column("os_version", sa.String(64), nullable=True),
        sa.Column("app_version", sa.String(32), nullable=True),
        sa.Column("device_secret_hash", sa.String(255), nullable=True),
        # pending_pairing | active | offline | unhealthy | revoked
        sa.Column("status", sa.String(20), nullable=False, server_default="pending_pairing"),
        sa.Column("capabilities", postgresql.JSONB, nullable=True),
        sa.Column("last_heartbeat_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("last_seen_ip", sa.String(64), nullable=True),
        sa.Column("paired_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("revoked_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column(
            "revoked_by", postgresql.UUID(as_uuid=True), sa.ForeignKey("users.id"), nullable=True
        ),
        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
        sa.Column(
            "updated_at",
            sa.DateTime(timezone=True),
            server_default=sa.func.now(),
            onupdate=sa.func.now(),
        ),
        # Pairing (device-code flow) — nulled once the device_secret has been delivered.
        sa.Column("device_code", sa.String(64), nullable=True, unique=True),
        sa.Column("user_code", sa.String(16), nullable=True),
        sa.Column("pairing_expires_at", sa.DateTime(timezone=True), nullable=True),
    )
    op.create_index("ix_devices_workspace_id", "devices", ["workspace_id"])
    op.create_index("ix_devices_device_code", "devices", ["device_code"])

    op.create_table(
        "device_events",
        sa.Column("id", postgresql.UUID(as_uuid=True), primary_key=True),
        sa.Column(
            "device_id",
            postgresql.UUID(as_uuid=True),
            sa.ForeignKey("devices.id", ondelete="CASCADE"),
            nullable=False,
        ),
        # paired | revoked | health_failed | recovered
        sa.Column("event_type", sa.String(32), nullable=False),
        # user | admin | device | health_monitor | security_event
        sa.Column("triggered_by", sa.String(32), nullable=False, server_default="user"),
        sa.Column("occurred_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
        sa.Column("metadata_json", postgresql.JSONB, nullable=True),
    )
    op.create_index("ix_device_events_device_id", "device_events", ["device_id"])
    op.create_index("ix_device_events_occurred_at", "device_events", ["occurred_at"])

    op.add_column(
        "codegen_runs",
        sa.Column("execution_target", sa.String(20), nullable=False, server_default="cloud"),
    )
    op.add_column(
        "codegen_runs",
        sa.Column(
            "device_id",
            postgresql.UUID(as_uuid=True),
            sa.ForeignKey("devices.id", ondelete="SET NULL"),
            nullable=True,
        ),
    )
    op.create_index("ix_codegen_runs_device_id", "codegen_runs", ["device_id"])


def downgrade() -> None:
    op.drop_index("ix_codegen_runs_device_id", table_name="codegen_runs")
    op.drop_column("codegen_runs", "device_id")
    op.drop_column("codegen_runs", "execution_target")

    op.drop_index("ix_device_events_occurred_at", table_name="device_events")
    op.drop_index("ix_device_events_device_id", table_name="device_events")
    op.drop_table("device_events")

    op.drop_index("ix_devices_device_code", table_name="devices")
    op.drop_index("ix_devices_workspace_id", table_name="devices")
    op.drop_table("devices")