"""add qa context workspaces

Revision ID: 20260507_add_qa_context_workspaces
Revises: 20260506_add_execution_runtime_credentials
Create Date: 2026-05-07
"""

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 = "20260507_add_qa_context_workspaces"
down_revision = "20260506_add_execution_runtime_credentials"
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 _column_exists(bind, table_name: str, column_name: str) -> bool:
    if not _table_exists(bind, table_name):
        return False
    return any(column["name"] == column_name for column in sa.inspect(bind).get_columns(table_name))


def upgrade() -> None:
    bind = op.get_bind()
    if not _table_exists(bind, "qa_session_states"):
        return
    with op.batch_alter_table("qa_session_states") as batch_op:
        if not _column_exists(bind, "qa_session_states", "active_workspace"):
            batch_op.add_column(sa.Column("active_workspace", _json_type(bind), nullable=True))
        if not _column_exists(bind, "qa_session_states", "context_capsules"):
            batch_op.add_column(sa.Column("context_capsules", _json_type(bind), nullable=True))


def downgrade() -> None:
    bind = op.get_bind()
    if not _table_exists(bind, "qa_session_states"):
        return
    with op.batch_alter_table("qa_session_states") as batch_op:
        if _column_exists(bind, "qa_session_states", "context_capsules"):
            batch_op.drop_column("context_capsules")
        if _column_exists(bind, "qa_session_states", "active_workspace"):
            batch_op.drop_column("active_workspace")