-- DropIndex
DROP INDEX IF EXISTS "onboarding_requests_email_verification_token_hash_key";

-- DropIndex
DROP INDEX IF EXISTS "onboarding_requests_expires_at_idx";

-- AlterTable
ALTER TABLE "onboarding_requests"
ADD COLUMN "otp_hash" TEXT,
ADD COLUMN "otp_expires_at" TIMESTAMP(3),
ADD COLUMN "otp_attempts" INTEGER NOT NULL DEFAULT 0,
ADD COLUMN "otp_last_sent_at" TIMESTAMP(3),
ADD COLUMN "otp_resend_count" INTEGER NOT NULL DEFAULT 0;

-- Backfill for existing rows
UPDATE "onboarding_requests"
SET
  "otp_hash" = md5("id"::text || ':legacy'),
  "otp_expires_at" = COALESCE("expires_at", NOW()),
  "otp_last_sent_at" = COALESCE("email_verification_sent_at", NOW());

-- Enforce required fields
ALTER TABLE "onboarding_requests"
ALTER COLUMN "otp_hash" SET NOT NULL,
ALTER COLUMN "otp_expires_at" SET NOT NULL,
ALTER COLUMN "otp_last_sent_at" SET NOT NULL;

-- CreateIndex
CREATE INDEX "onboarding_requests_otp_expires_at_idx" ON "onboarding_requests"("otp_expires_at");

-- Drop legacy columns
ALTER TABLE "onboarding_requests"
DROP COLUMN "email_verification_token_hash",
DROP COLUMN "email_verification_sent_at",
DROP COLUMN "expires_at";