-- Phase 7: Idle shutdown, credits, usage metering, plan quotas

CREATE TYPE "CreditTransactionType" AS ENUM ('GRANT', 'USAGE_DEBIT', 'ADJUSTMENT', 'EXPIRE');

ALTER TABLE "plans"
  ADD COLUMN IF NOT EXISTS "maxServersPerUser" INTEGER,
  ADD COLUMN IF NOT EXISTS "idleTimeoutMinutes" INTEGER NOT NULL DEFAULT 15,
  ADD COLUMN IF NOT EXISTS "idleGraceAfterStartMinutes" INTEGER NOT NULL DEFAULT 3,
  ADD COLUMN IF NOT EXISTS "idleCountdownSeconds" INTEGER NOT NULL DEFAULT 120,
  ADD COLUMN IF NOT EXISTS "queuePriority" INTEGER NOT NULL DEFAULT 0,
  ADD COLUMN IF NOT EXISTS "monthlyCreditGrant" INTEGER NOT NULL DEFAULT 0;

ALTER TABLE "game_servers"
  ADD COLUMN IF NOT EXISTS "idleShutdownEnabled" BOOLEAN NOT NULL DEFAULT true,
  ADD COLUMN IF NOT EXISTS "lastPlayerSeenAt" TIMESTAMPTZ(3),
  ADD COLUMN IF NOT EXISTS "idleStopAt" TIMESTAMPTZ(3),
  ADD COLUMN IF NOT EXISTS "runningSince" TIMESTAMPTZ(3),
  ADD COLUMN IF NOT EXISTS "lastMeteredAt" TIMESTAMPTZ(3);

CREATE TABLE "credit_wallets" (
  "id" TEXT NOT NULL,
  "userId" TEXT NOT NULL,
  "balance" INTEGER NOT NULL DEFAULT 0,
  "periodStart" TIMESTAMPTZ(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
  "createdAt" TIMESTAMPTZ(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
  "updatedAt" TIMESTAMPTZ(3) NOT NULL,

  CONSTRAINT "credit_wallets_pkey" PRIMARY KEY ("id")
);

CREATE UNIQUE INDEX "credit_wallets_userId_key" ON "credit_wallets"("userId");

ALTER TABLE "credit_wallets"
  ADD CONSTRAINT "credit_wallets_userId_fkey"
  FOREIGN KEY ("userId") REFERENCES "users"("id") ON DELETE CASCADE ON UPDATE CASCADE;

CREATE TABLE "credit_transactions" (
  "id" TEXT NOT NULL,
  "walletId" TEXT NOT NULL,
  "amount" INTEGER NOT NULL,
  "type" "CreditTransactionType" NOT NULL,
  "referenceType" TEXT,
  "referenceId" TEXT,
  "idempotencyKey" TEXT NOT NULL,
  "metadata" JSONB,
  "createdAt" TIMESTAMPTZ(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

  CONSTRAINT "credit_transactions_pkey" PRIMARY KEY ("id")
);

CREATE UNIQUE INDEX "credit_transactions_idempotencyKey_key" ON "credit_transactions"("idempotencyKey");
CREATE INDEX "credit_transactions_walletId_createdAt_idx" ON "credit_transactions"("walletId", "createdAt");

ALTER TABLE "credit_transactions"
  ADD CONSTRAINT "credit_transactions_walletId_fkey"
  FOREIGN KEY ("walletId") REFERENCES "credit_wallets"("id") ON DELETE CASCADE ON UPDATE CASCADE;

CREATE TABLE "usage_records" (
  "id" TEXT NOT NULL,
  "serverId" TEXT NOT NULL,
  "userId" TEXT NOT NULL,
  "ramMb" INTEGER NOT NULL,
  "durationSeconds" INTEGER NOT NULL,
  "creditsCharged" INTEGER NOT NULL,
  "periodStart" TIMESTAMPTZ(3) NOT NULL,
  "periodEnd" TIMESTAMPTZ(3) NOT NULL,
  "idempotencyKey" TEXT NOT NULL,
  "createdAt" TIMESTAMPTZ(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

  CONSTRAINT "usage_records_pkey" PRIMARY KEY ("id")
);

CREATE UNIQUE INDEX "usage_records_idempotencyKey_key" ON "usage_records"("idempotencyKey");
CREATE INDEX "usage_records_serverId_periodStart_idx" ON "usage_records"("serverId", "periodStart");
CREATE INDEX "usage_records_userId_periodStart_idx" ON "usage_records"("userId", "periodStart");

ALTER TABLE "usage_records"
  ADD CONSTRAINT "usage_records_serverId_fkey"
  FOREIGN KEY ("serverId") REFERENCES "game_servers"("id") ON DELETE CASCADE ON UPDATE CASCADE;