"""add query route memories

Revision ID: 20260415_add_query_route_memories
Revises: 20260413_rename_control_plane_status
Create Date: 2026-04-15
"""

from __future__ import annotations

from alembic import op
import sqlalchemy as sa

try:
    from sqlalchemy.dialects.postgresql import JSONB
except Exception:  # pragma: no cover
    JSONB = sa.JSON


revision = "20260415_add_query_route_memories"
down_revision = "20260413_rename_control_plane_status"
branch_labels = None
depends_on = None


def _json_type(bind):
    return JSONB() if bind.dialect.name == "postgresql" else sa.JSON()


def _table_exists(bind, table_name: str) -> bool:
    return sa.inspect(bind).has_table(table_name)


def upgrade() -> None:
    bind = op.get_bind()
    if _table_exists(bind, "query_route_memories"):
        return

    op.create_table(
        "query_route_memories",
        sa.Column("id", sa.Integer(), primary_key=True, autoincrement=True),
        sa.Column("tenant_id", sa.BigInteger(), nullable=False),
        sa.Column("created_at", sa.TIMESTAMP(), server_default=sa.func.now(), nullable=False),
        sa.Column("updated_at", sa.TIMESTAMP(), server_default=sa.func.now(), nullable=False),
        sa.Column("qa_record_id", sa.Integer(), sa.ForeignKey("qa_records.id", ondelete="CASCADE"), nullable=False),
        sa.Column("project_id", sa.BigInteger(), nullable=True),
        sa.Column("question_text", sa.Text(), nullable=False),
        sa.Column("route_mode_predicted", sa.String(length=32), nullable=False),
        sa.Column("route_mode_effective", sa.String(length=32), nullable=False),
        sa.Column("decision_origin", sa.String(length=64), nullable=True),
        sa.Column("reply_contract", _json_type(bind), nullable=True),
        sa.Column("probe_snapshot", _json_type(bind), nullable=True),
        sa.Column("query_profile", _json_type(bind), nullable=True),
        sa.Column("feedback_outcome", _json_type(bind), nullable=True),
        sa.Column("question_embedding", _json_type(bind), nullable=True),
        sa.UniqueConstraint(
            "tenant_id",
            "qa_record_id",
            name="uq_query_route_memories_tenant_qa_record",
        ),
    )
    op.create_index("ix_query_route_memories_tenant_id", "query_route_memories", ["tenant_id"], unique=False)
    op.create_index("ix_query_route_memories_qa_record_id", "query_route_memories", ["qa_record_id"], unique=False)
    op.create_index("ix_query_route_memories_project_id", "query_route_memories", ["project_id"], unique=False)
    op.create_index(
        "ix_query_route_memories_route_mode_predicted",
        "query_route_memories",
        ["route_mode_predicted"],
        unique=False,
    )
    op.create_index(
        "ix_query_route_memories_route_mode_effective",
        "query_route_memories",
        ["route_mode_effective"],
        unique=False,
    )
    op.create_index(
        "ix_query_route_memories_decision_origin",
        "query_route_memories",
        ["decision_origin"],
        unique=False,
    )


def downgrade() -> None:
    bind = op.get_bind()
    if not _table_exists(bind, "query_route_memories"):
        return

    for index_name in (
        "ix_query_route_memories_decision_origin",
        "ix_query_route_memories_route_mode_effective",
        "ix_query_route_memories_route_mode_predicted",
        "ix_query_route_memories_project_id",
        "ix_query_route_memories_qa_record_id",
        "ix_query_route_memories_tenant_id",
    ):
        op.drop_index(index_name, table_name="query_route_memories")
    op.drop_table("query_route_memories")