"""add ai_build session kind

Revision ID: beca7464b6b4
Revises: b3358ba0e48c
Create Date: 2026-05-29 18:41:38.601537

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision: str = 'beca7464b6b4'
down_revision: Union[str, None] = 'b3358ba0e48c'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.drop_constraint("ck_l1_walk_sessions_session_kind", "l1_walk_sessions", type_="check")
    op.create_check_constraint(
        "ck_l1_walk_sessions_session_kind", "l1_walk_sessions",
        "session_kind IN ('flow', 'proposal', 'adhoc', 'ai_build')",
    )
    op.drop_constraint("ck_l1_walk_sessions_target_consistency", "l1_walk_sessions", type_="check")
    op.create_check_constraint(
        "ck_l1_walk_sessions_target_consistency", "l1_walk_sessions",
        "(session_kind = 'flow' AND flow_id IS NOT NULL AND flow_proposal_id IS NULL) "
        "OR (session_kind = 'proposal' AND flow_proposal_id IS NOT NULL AND flow_id IS NULL) "
        "OR (session_kind IN ('adhoc', 'ai_build') AND flow_id IS NULL AND flow_proposal_id IS NULL)",
    )


def downgrade() -> None:
    op.drop_constraint("ck_l1_walk_sessions_target_consistency", "l1_walk_sessions", type_="check")
    op.create_check_constraint(
        "ck_l1_walk_sessions_target_consistency", "l1_walk_sessions",
        "(session_kind = 'flow' AND flow_id IS NOT NULL AND flow_proposal_id IS NULL) "
        "OR (session_kind = 'proposal' AND flow_proposal_id IS NOT NULL AND flow_id IS NULL) "
        "OR (session_kind = 'adhoc' AND flow_id IS NULL AND flow_proposal_id IS NULL)",
    )
    op.drop_constraint("ck_l1_walk_sessions_session_kind", "l1_walk_sessions", type_="check")
    op.create_check_constraint(
        "ck_l1_walk_sessions_session_kind", "l1_walk_sessions",
        "session_kind IN ('flow', 'proposal', 'adhoc')",
    )