-- Create order_reviews table
CREATE TABLE IF NOT EXISTS order_reviews (
    id SERIAL PRIMARY KEY,
    transaction_id INTEGER NOT NULL UNIQUE REFERENCES transactions(id) ON DELETE CASCADE,
    rating TEXT,
    order_again BOOLEAN,
    note TEXT,
    item_verdicts JSONB NOT NULL DEFAULT '[]',
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- Add source_message_id to expense_metadata
ALTER TABLE expense_metadata ADD COLUMN IF NOT EXISTS source_message_id TEXT;

-- 1. Admit 'credits' as a payment method.
ALTER TABLE transactions DROP CONSTRAINT IF EXISTS transactions_payment_method_check;
ALTER TABLE transactions ADD CONSTRAINT transactions_payment_method_check
  CHECK (payment_method IS NULL OR payment_method IN
         ('card','cash','bank_transfer','credits','other'));

-- 2. Idempotency key (I7). Partial: rows without an order_reference
--    (manual entries) are unaffected.
CREATE UNIQUE INDEX IF NOT EXISTS uq_expense_source_order
  ON expense_metadata (source, order_reference)
  WHERE order_reference IS NOT NULL;

-- 3. I1 as a database-level guard, not just workflow logic.
--    Scoped to pipeline-created rows so manual/statement rows are untouched.
ALTER TABLE transactions DROP CONSTRAINT IF EXISTS chk_ingested_orders_after_cutover;
ALTER TABLE transactions ADD CONSTRAINT chk_ingested_orders_after_cutover
  CHECK (
    payment_method IS DISTINCT FROM 'credits'
    OR transaction_date >= DATE '2026-01-09'
  );

-- 4. Constrain the review verdict (§6.1).
ALTER TABLE order_reviews DROP CONSTRAINT IF EXISTS chk_order_review_rating;
ALTER TABLE order_reviews ADD CONSTRAINT chk_order_review_rating
  CHECK (rating IS NULL OR rating IN ('again','fine','never'));