"""Qualify pgcrypto digest in the contact sync trigger.

Revision ID: 0002_pgcrypto_digest
Revises: 0001_initial
Create Date: 2026-07-16
"""

from collections.abc import Sequence

from alembic import op

revision: str = "0002_pgcrypto_digest"
down_revision: str | None = "0001_initial"
branch_labels: str | Sequence[str] | None = None
depends_on: str | Sequence[str] | None = None


def upgrade() -> None:
    op.execute(
        """
        CREATE OR REPLACE FUNCTION han_app.enqueue_contact_sync()
        RETURNS trigger
        LANGUAGE plpgsql
        SECURITY INVOKER
        SET search_path = han_app, pg_temp
        AS $$
        DECLARE
            v_entity_id uuid;
            v_task_type text;
            v_dedup text;
        BEGIN
            IF current_setting('han.sync_suppress', true) = 'true' THEN
                RETURN NEW;
            END IF;
            IF TG_TABLE_NAME = 'user_identities' THEN
                v_entity_id := NEW.id;
                v_task_type := CASE WHEN TG_OP = 'INSERT'
                    THEN 'contact.map_or_create' ELSE 'contact.update' END;
            ELSE
                v_entity_id := NEW.user_id;
                v_task_type := CASE WHEN TG_OP = 'INSERT'
                    THEN 'contact.map_or_create' ELSE 'contact.update' END;
            END IF;
            v_dedup := v_task_type || ':' || v_entity_id::text || ':' ||
                encode(public.digest(row_to_json(NEW)::text, 'sha256'), 'hex');
            INSERT INTO han_app.sync_queue
                (id, task_type, entity_type, entity_id, dedup_key, payload_json,
                 status, attempt_count, next_attempt_at, created_at, updated_at)
            VALUES
                (gen_random_uuid(), v_task_type, 'contact', v_entity_id, v_dedup,
                 jsonb_build_object('entity_id', v_entity_id), 'pending', 0,
                 now(), now(), now())
            ON CONFLICT (dedup_key) DO NOTHING;
            RETURN NEW;
        END;
        $$
        """
    )


def downgrade() -> None:
    raise RuntimeError("Contact sync trigger migration is forward-only")