"""Create ai_decision_records table for oversight.

Revision ID: 0128
Revises: 0127
"""

from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects.postgresql import UUID, JSONB

revision = "0128"
down_revision = "0127"
branch_labels = None
depends_on = None


def upgrade() -> None:
    # Use IF NOT EXISTS to avoid DuplicateTableError if table was already
    # created by Base.metadata.create_all() in prestart.sh
    op.execute("""
        CREATE TABLE IF NOT EXISTS ai_decision_records (
            id UUID NOT NULL DEFAULT gen_random_uuid() PRIMARY KEY,
            tenant_id UUID NOT NULL REFERENCES tenants(id) ON DELETE CASCADE,
            owner_id UUID,
            agent_run_id UUID NOT NULL,
            recommendation TEXT NOT NULL,
            evidence JSONB NOT NULL DEFAULT '{}',
            reviewer_id UUID,
            decision VARCHAR(20),
            decision_timestamp VARCHAR(40),
            deviation_note TEXT,
            created_at TIMESTAMP WITH TIME ZONE DEFAULT now() NOT NULL,
            updated_at TIMESTAMP WITH TIME ZONE DEFAULT now() NOT NULL,
            deleted_at TIMESTAMP WITH TIME ZONE
        )
    """)
    op.execute("CREATE INDEX IF NOT EXISTS ix_ai_decision_records_tenant_id ON ai_decision_records(tenant_id)")
    op.execute("CREATE INDEX IF NOT EXISTS ix_ai_decision_records_agent_run_id ON ai_decision_records(agent_run_id)")


def downgrade() -> None:
    op.drop_table("ai_decision_records")