-- Additive upgrade before Prisma db push; safe to run repeatedly.
-- On a fresh database Prisma creates the entire schema afterwards.
DO $upgrade$
BEGIN
  IF to_regclass('invitations') IS NULL THEN
    RETURN;
  END IF;

  ALTER TABLE "invitations"
    ADD COLUMN IF NOT EXISTS "userId" TEXT,
    ADD COLUMN IF NOT EXISTS "sentAt" TIMESTAMP(3),
    ADD COLUMN IF NOT EXISTS "lastAttemptAt" TIMESTAMP(3),
    ADD COLUMN IF NOT EXISTS "leaseUntil" TIMESTAMP(3),
    ADD COLUMN IF NOT EXISTS "attempts" INTEGER NOT NULL DEFAULT 0,
    ADD COLUMN IF NOT EXISTS "failed" BOOLEAN NOT NULL DEFAULT false;

  CREATE UNIQUE INDEX IF NOT EXISTS "invitations_userId_key" ON "invitations"("userId");

  IF NOT EXISTS (
    SELECT 1 FROM pg_constraint
    WHERE conname = 'invitations_userId_fkey'
      AND conrelid = 'invitations'::regclass
  ) THEN
    ALTER TABLE "invitations"
      ADD CONSTRAINT "invitations_userId_fkey"
      FOREIGN KEY ("userId") REFERENCES "users"("id")
      ON DELETE CASCADE ON UPDATE CASCADE;
  END IF;
END
$upgrade$;