-- Add an auditable cancellation exclusion count without changing released facts.
-- PostgreSQL 15+. Migrations 008 through 019 remain immutable.
BEGIN;
DO $$
BEGIN
    IF current_database() <> 'booking_test' THEN
        RAISE EXCEPTION 'ARR migration is allowed only in booking_test';
    END IF;
    IF to_regclass('finance.daily_versions') IS NULL
       OR to_regclass('finance.daily_records') IS NULL
       OR NOT EXISTS (
           SELECT 1 FROM pg_constraint
           WHERE conrelid = 'ingestion.artifacts'::regclass
             AND conname = 'artifacts_artifact_kind_check'
             AND pg_get_constraintdef(oid) LIKE '%ohip_json%'
       ) THEN
        RAISE EXCEPTION 'ARR migration 019 must be applied first';
    END IF;
END $$;

ALTER TABLE finance.daily_versions
    ADD COLUMN excluded_cancelled_rows integer NOT NULL DEFAULT 0
        CHECK (excluded_cancelled_rows >= 0);

ALTER TABLE finance.daily_versions
    DROP CONSTRAINT daily_versions_counts_reconcile;
ALTER TABLE finance.daily_versions
    ADD CONSTRAINT daily_versions_counts_reconcile CHECK (
        source_rows = retained_rows + excluded_rate_code_rows + duplicate_rows
            + validation_failed_rows + price_unmatched_rows + excluded_cancelled_rows
    );

ALTER TABLE finance.daily_records
    DROP CONSTRAINT daily_records_outcome_check;
ALTER TABLE finance.daily_records
    ADD CONSTRAINT daily_records_outcome_check CHECK (outcome IN (
        'retained', 'excluded_rate_code', 'duplicate', 'validation_failed',
        'price_unmatched', 'excluded_cancelled'
    ));

COMMENT ON COLUMN finance.daily_versions.excluded_cancelled_rows IS
  'Source rows explicitly excluded as cancelled under the pinned processor rules; older versions remain zero.';
COMMIT;