# This is NOT the Next.js you know

This version has breaking changes — APIs, conventions, and file structure may all differ from your training data. Read the relevant guide in `node_modules/next/dist/docs/` before writing any code. Heed deprecation notices.

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# Project: chocoadmin

Admin panel for the chocomae service (mouse-typing), extracted into a standalone Next.js 16 app. It shares the existing MariaDB database — **do not modify the DB schema**.

## Critical rules

- **Never alter the DB schema.** All tables are shared with the live chocomae service.
- **Race-condition guard for approve/cancel/reject**: use a conditional `updateMany({ where: { id, Status: REQUEST_STATUSES.REQUESTED }, data: { Status: <target> } })` as the first step inside a transaction. If `count === 0`, check existence to return 404 vs 409. Never use read-then-write (findUnique → check Status → update) — it allows double-processing under concurrent requests.
- **Wrap every mutation in a transaction**: `maestro`, `maestro_extension`/`maestro_upgrade`, and `maestro_log` must be updated atomically.
- **Send email only after a successful commit**, never inside the transaction.
- **Never use `include: { maestro: true }`** when querying `maestro_extension` or `maestro_upgrade`. Always use `select` with only the needed columns to avoid logging the maestro `Password` field.
- Admin password verification uses MariaDB `PASSWORD()` function — the existing `admin` table stores hashed passwords this way. Do not change this without a migration plan.
- Extension approval date calculation happens **server-side**: if current expiry is in the past, use today +1 year; otherwise use current expiry +1 year.
- Upgrade approval sets `AvailableActivateDateTime = NOW() + 1 year`. **Do not change `PlayerCount`** on upgrade.
- When approving an extension or upgrade, close all other `Status = 1` requests for the same `MaestroID` by setting them to `Status = 2`, then set the approved request to `Status = 3`.
- **Docker containers must set `TZ: Asia/Seoul`** so that date calculations (`setHours(0,0,0,0)`, `formatDate`) match the KST-based existing data in the shared MariaDB.

## Authentication

- NextAuth.js v5 (`next-auth@5.0.0-beta.31`) with Credentials Provider.
- Config lives in `auth.ts` (project root), not inside `app/`.
- Unauthenticated requests are caught by `proxy.ts` (middleware) and redirected to `/login`.
- API routes must call `auth()` and return 401 if no session.

## Key files

| File | Purpose |
|---|---|
| `auth.ts` | NextAuth config (Credentials Provider, MariaDB PASSWORD verify) |
| `proxy.ts` | Middleware — redirects unauthenticated users to /login |
| `lib/db.ts` | Prisma Client singleton with SQL pretty-logging and result table logging |
| `lib/logger.ts` | Structured logger — `debug/info/warn/error`, level controlled by `LOG_LEVEL` / `APP_ENV` |
| `lib/errors.ts` | `ApiError` — unified error class with HTTP status code |
| `lib/api-handler.ts` | `withApiHandler` — wraps route handlers with auth, timing, and error logging |
| `lib/constants.ts` | Status code constants (`ACTIVATE_STATUS`, `ACCOUNT_TYPE`, `REQUEST_STATUS`); `PAID_ACCOUNT_TYPE_VALUES` (유료 계정 유형 배열 — 중복 정의 방지용 공용 상수) |
| `lib/maestros.ts` | Maestro DB queries |
| `lib/extension-requests.ts` | Extension request queries and approval logic |
| `lib/upgrade-requests.ts` | Upgrade request queries and approval logic |
| `prisma/schema.prisma` | Generated via `prisma db pull` — do not hand-edit model fields |
| `docs/business-rules.md` | Full reference for existing chocomae business logic |
| `docs/phase/phase9.md` | Log policy: levels, format, masking rules, Docker log operations |

## maestro_log conventions

Always record a log entry after a successful DB change. Use these `Type` values:

| Type | When |
|---|---|
| `extension_maestro` | Extension approved |
| `cancel_extension_maestro` | Extension cancelled (new type, not in original) |
| `upgrade_maestro` | Upgrade approved |
| `reject_upgrade_maestro` | Upgrade rejected (new type, not in original) |
| `update_maestro_name` | Maestro name changed | `{prev} -> {new}` |
| `update_maestro_email` | Maestro email changed | `{prev} -> {new}` |
| `update_maestro_status` | ActivateStatus changed (admin, new) | `{prev} -> {new}` (numeric) |
| `update_maestro_account_type` | AccountType changed (admin, new) | `{prev} -> {new}` (numeric) |
| `update_maestro_available_date` | AvailableActivateDateTime changed (admin, new) | `{YYYY-MM-DD} -> {YYYY-MM-DD}` |
| `update_maestro_allow_enter_code` | AllowEditEnterCode changed (admin, new) | `{prev} -> {new}` (0 or 1) |

`Remark` column is `char(100)` — keep values under 100 characters.

## Implemented phases (do not re-implement)

- Phase 0–8: login, maestro list/detail, extension requests, upgrade requests, Docker setup, transaction safety, auth guards.
- Phase 9 (substantially complete): structured logging (`lib/logger.ts`), `withApiHandler` wrapper (`lib/api-handler.ts`), `ApiError` class (`lib/errors.ts`), Prisma SQL pretty-logging and result table logging (`lib/db.ts`). Remaining: correlation IDs, stage/production log verification.
- Phase 10: Maestro info edit form (`PATCH /api/maestros/[id]`) + student list with server-side pagination (`GET /api/maestros/[id]/students`).
- Phase 11: Email auto-send via Nodemailer after extension/upgrade approval (`lib/mail.ts`). Upgrade email edge-case verification (trial→paid, paid→paid) still pending.
- Phase 12: Admin-initiated extension/upgrade request registration from maestro detail page.
  - `POST /api/maestros/[id]/extension-requests` — inserts into `maestro_extension` using maestro's current `AccountType` read server-side; rejects trial account types.
  - `POST /api/maestros/[id]/upgrade-requests` — inserts into `maestro_upgrade` inside a transaction; validates `requestedAccountType > maestro.AccountType`.
  - `ExtensionRequestsSection.tsx`, `UpgradeRequestsSection.tsx` — client components with inline action UI; call `router.refresh()` on success.
  - `PAID_ACCOUNT_TYPE_VALUES` consolidated in `lib/constants.ts` — shared by `lib/maestros.ts`, `lib/extension-requests.ts`, `lib/upgrade-requests.ts`, and both new API routes.
- Phase 13 (security/correctness fixes):
  - P0-1: `getActionTarget` in `lib/extension-requests.ts` replaced with inline `select` (no `include: { maestro: true }`) — prevents `Password` from appearing in debug result logs.
  - P0-2: Approve/cancel/reject flows in both `lib/extension-requests.ts` and `lib/upgrade-requests.ts` now use an atomic `updateMany({ Status: REQUESTED → target })` guard; `count === 0` triggers 404/409 — eliminates concurrent double-processing.
  - P0-3: `docker-compose.yml` and `docker-compose.stage.yml` now set `TZ: Asia/Seoul`; `lib/maestros.ts` date-change log remark uses `formatDate()` instead of `toISOString().slice(0,10)` for KST consistency.

## Planned phases (not yet implemented)

이후 작업 후보는 `docs/plan/project-plan.md` Section 10 "MVP 이후 확장 후보" 참조.

## Packages to know

- `mariadb` + `@prisma/adapter-mariadb` — Prisma uses the mariadb driver directly (not mysql2)
- `@base-ui/react` — used instead of Radix UI primitives for shadcn components
- `zod` v4 — Zod v4 API differs from v3; check docs before writing schemas
- `next-auth` v5 beta — API surface differs significantly from v4