# Admin Panel: Invite Codes + User Management Enhancement

**Date:** 2026-02-12
**Status:** Proposed — Combined Plan

---

## Summary

Enhance admin capabilities to:

1. Create invite codes tied to plans (`free`, `pro`, `team`) with optional trial durations.
2. Send invite emails via Resend (best-effort, non-blocking).
3. Apply invite-assigned plan/trial on registration.
4. Give admins a detailed user management view with subscription, session, and audit context.
5. Support admin subscription actions (change plan, extend/start trial).
6. Auto-downgrade expired trials during authenticated access checks.

---

## Goals

- Remove manual invite-code sharing workflow.
- Support controlled beta onboarding with plan + trial at invite level.
- Enable operational admin workflows for account/subscription lifecycle.
- Keep backward compatibility where practical and avoid unsafe breaking changes.

---

## Non-Goals

- Stripe billing workflow redesign.
- Full historical pagination for user-detail sessions/audits in this iteration.
- Rework of account invite (`/accounts/me/invites`) flow.

---

## Key Decisions Locked

| Decision | Choice | Rationale |
|----------|--------|-----------|
| Invite API path | Standardize on `/invites` | Already in use (`router = APIRouter(prefix="/invites")`). Update CLAUDE.md which incorrectly references `/invite-codes`. |
| User detail endpoint | Enrich existing `GET /admin/users/{id}` | One endpoint, richer response. No reason for admin to get a "lite" version. |
| Invite email matching | Advisory only (no strict enforcement) | The invite code itself is the security gate. Email is for admin tracking. Strict matching creates friction during beta. |
| Invite plan/trial application | Applies whenever a valid invite code is provided, even if `REQUIRE_INVITE_CODE=false` | Ensures plan/trial always carries through regardless of registration policy. |
| Trial duration bounds | 1–90 days | 90 days covers any realistic beta period. Protects against typos. Admin can always extend after expiry. |
| Extend trial behavior | May convert non-trialing subscriptions to `trialing` | Admin should have maximum control. Covers scenarios like forgotten trial assignment or second chances. |
| User detail payload | Recent summaries (latest 10 sessions + 10 audit logs) + total counts | Balances useful at-a-glance admin view with response performance. Full history via future paginated endpoints. |

---

## Phase 1: Database Migration (030)

**New file:** `backend/alembic/versions/030_enhance_invite_codes.py` (down revision `029`)

Add columns to `invite_codes`:

- `email`: `String(255)`, nullable, indexed.
- `assigned_plan`: `String(50)`, non-null, server default `'free'`.
- `trial_duration_days`: `Integer`, nullable.
- `email_sent_at`: `DateTime(timezone=True)`, nullable.

Database constraints:

- `assigned_plan IN ('free', 'pro', 'team')`.
- `trial_duration_days IS NULL OR trial_duration_days BETWEEN 1 AND 90`.
- Consistency guard: `assigned_plan = 'free'` implies `trial_duration_days IS NULL`.

**Update:** `backend/app/models/invite_code.py`

- Add mapped columns for all new fields.
- Add computed properties:
  - `has_trial: bool` — `trial_duration_days is not None and > 0`
  - `email_sent: bool` — `email_sent_at is not None`

---

## Phase 2: Resend Email Integration

**New file:** `backend/app/core/email.py`

- `EmailService` class with `send_invite_email(to_email, code, plan, trial_days, signup_url) -> bool`.
- Returns `False` if `RESEND_API_KEY` not set (graceful degradation).
- Catches provider failures, returns `False`, logs warning/error.
- Never blocks invite creation (best-effort delivery).

**New file:** `backend/app/templates/invite_email.html`

- Branded HTML email: monochrome design, ResolutionFlow logo, CTA button.
- Shows invite code, plan name, trial duration if applicable, signup link.

**Update:** `backend/app/core/config.py`

- Add `RESEND_API_KEY: Optional[str] = None`
- Add `FROM_EMAIL: str = "ResolutionFlow <invites@resolutionflow.com>"`
- Add `email_enabled` computed property.

**Update:** `backend/requirements.txt` — add `resend` package.

**Env vars required:** `RESEND_API_KEY`, `FROM_EMAIL` (has default).

**Prerequisite:** DNS records (SPF, DKIM) must be configured in Resend for `resolutionflow.com` domain before production email delivery will work.

---

## Phase 3: Backend Schemas + Endpoints

### 3a. Invite Code Schemas

**Update:** `backend/app/schemas/invite_code.py`

`InviteCodeCreate` — add fields:

- `email: Optional[EmailStr]`
- `assigned_plan: Literal['free', 'pro', 'team'] = 'free'`
- `trial_duration_days: Optional[int]` (validated 1–90)

`InviteCodeResponse` — add fields:

- `email`, `assigned_plan`, `trial_duration_days`, `email_sent_at`
- Computed flags: `has_trial`, `email_sent`

### 3b. Invite Endpoints

**Update:** `backend/app/api/endpoints/invite.py`

- `POST /invites` — accept new fields (email, assigned_plan, trial_duration_days).
  - Create invite with plan/trial/email metadata.
  - If email provided, attempt send via EmailService.
  - On send success: set `email_sent_at`.
  - On send failure: invite still returns 201.
  - Add audit log entry for invite creation with delivery result.
- Keep `GET /invites`, `DELETE /invites/{code}`, `GET /invites/validate/{code}` behavior compatible.

### 3c. Registration Plan Assignment

**Update:** `backend/app/api/endpoints/auth.py` (registration endpoint, around lines 178–183)

- If invite code is supplied and valid, load it and apply invite plan/trial **regardless of `REQUIRE_INVITE_CODE` setting**.
- For non-account-invite registrations:
  - Create subscription with `plan = invite_code.assigned_plan` (fallback `'free'`).
  - If `trial_duration_days` is set:
    - `status = 'trialing'`
    - `current_period_start = now`
    - `current_period_end = now + trial_duration_days`
  - Else: `status = 'active'`.
- Preserve existing account-invite join flow behavior.
- Mark invite as used after user creation.

### 3d. Admin Subscription + User Detail Endpoints

**Update:** `backend/app/api/endpoints/admin.py`

Enrich `GET /admin/users/{id}` response to include:

- Base user fields (name, email, role, active status).
- Account summary (account name, display code).
- Subscription summary (plan, status, trial end date).
- Recent sessions: latest 10 + total count.
- Recent audit logs: latest 10 + total count.
- Invite code used summary (code, assigned plan, who created it).

Add new endpoints:

- `PUT /admin/users/{id}/subscription/plan` — change user's plan.
- `PUT /admin/users/{id}/subscription/extend-trial` — add days to trial, or convert to trialing if not already.

Both endpoints should create audit log entries.

### 3e. Trial Expiry Check

**Update:** `backend/app/api/deps.py` — in `get_current_active_user`

- Check account subscription status.
- If `status = 'trialing'` and `current_period_end < now`:
  - Set `plan = 'free'`, `status = 'active'`.
  - Clear/normalize trial period fields.
  - Commit before returning user.

**Note:** This is a lightweight login-time check. Users with active JWT sessions will retain access until token refresh. Acceptable for beta; revisit if stricter enforcement needed later.

---

## Phase 4: Backend Schema Additions

**Check first:** Verify whether `backend/app/schemas/subscription.py` already exists. If it does, extend it. If not, create it.

Schemas needed in `backend/app/schemas/subscription.py`:

- `SubscriptionPlanUpdate` — for plan change requests.
- `ExtendTrialRequest` — for trial extension requests.
- `SubscriptionResponse` — for subscription state in responses.

**New file:** `backend/app/schemas/user_detail.py`

- `AccountSummary`
- `SessionSummary`
- `AuditLogSummary`
- `InviteCodeUsedSummary`
- `UserDetailResponse` (superset response for enriched `/admin/users/{id}`)

---

## Phase 5: Frontend Types + API Client

**Update:** `frontend/src/types/admin.ts`

- Enhanced `InviteCodeResponse` with email, plan, trial, email-sent fields.
- New types: `UserDetail`, `SubscriptionDetail`, `SessionSummary`, `AuditLogSummary`, `AccountSummary`.

**Update:** `frontend/src/api/admin.ts`

- Ensure invite endpoints target `/invites` (not `/invite-codes`).
- Enhance `createInviteCode` payload with new fields.
- Add: `getUserDetail(userId)`, `updateUserSubscriptionPlan(userId, plan)`, `extendUserTrial(userId, days)`.

---

## Phase 6: Frontend — Enhanced Invite Codes Page

**Update:** `frontend/src/pages/admin/InviteCodesPage.tsx`

Create form additions:

- Email input (optional, validated).
- Plan selector dropdown (Free / Pro / Team).
- Trial duration input (number of days, shown only when plan ≠ free).

Table additions:

- "Recipient" column (email or "—").
- "Plan" column with badge.
- "Trial" column (days or "—").
- "Email Sent" indicator.

Preserve existing create/copy/delete actions and status badges.

---

## Phase 7: Frontend — User Detail Page

**New file:** `frontend/src/pages/admin/UserDetailPage.tsx`

Sections:

- **Header** — name, email, role badges, active status.
- **Account & Subscription card** — plan, status, trial end date, account display code.
- **Admin Actions card** — Change Role, Change Plan, Extend/Start Trial, Activate/Deactivate (modal-based).
- **Recent Sessions tab** — tree name, started, completed, outcome.
- **Audit Logs tab** — action, resource, timestamp, expandable details.
- **Invite Code card** — code used, plan assigned, who created it.

**Update:** `frontend/src/router.tsx` — add route `admin/users/:userId`.

**Update:** `frontend/src/pages/admin/UsersPage.tsx` — make user rows clickable to navigate to detail page. Ensure action menu clicks (dropdowns, buttons) don't trigger row navigation.

---

## File Inventory

### Files to Create

| File | Phase |
|------|-------|
| `backend/alembic/versions/030_enhance_invite_codes.py` | 1 |
| `backend/app/core/email.py` | 2 |
| `backend/app/templates/invite_email.html` | 2 |
| `backend/app/schemas/subscription.py` (verify doesn't exist first) | 4 |
| `backend/app/schemas/user_detail.py` | 4 |
| `frontend/src/pages/admin/UserDetailPage.tsx` | 7 |

### Files to Modify

| File | Phase | What Changes |
|------|-------|-------------|
| `backend/app/models/invite_code.py` | 1 | Add new columns + computed properties |
| `backend/app/core/config.py` | 2 | Add RESEND_API_KEY, FROM_EMAIL, email_enabled |
| `backend/requirements.txt` | 2 | Add resend package |
| `backend/app/schemas/invite_code.py` | 3a | Add email, plan, trial fields to create/response |
| `backend/app/api/endpoints/invite.py` | 3b | Accept new fields, send email, audit log |
| `backend/app/api/endpoints/auth.py` | 3c | Apply invite plan/trial on registration (lines ~178–183) |
| `backend/app/api/endpoints/admin.py` | 3d | Enrich user detail, add subscription endpoints |
| `backend/app/api/deps.py` | 3e | Trial expiry check in get_current_active_user |
| `frontend/src/types/admin.ts` | 5 | Enhanced invite + new detail types |
| `frontend/src/api/admin.ts` | 5 | New API functions, fix invite path |
| `frontend/src/pages/admin/InviteCodesPage.tsx` | 6 | Form + table enhancements |
| `frontend/src/pages/admin/UsersPage.tsx` | 7 | Clickable rows → detail page |
| `frontend/src/router.tsx` | 7 | Add user detail route |

### Also Update (Housekeeping)

| File | What Changes |
|------|-------------|
| `CLAUDE.md` | Fix invite codes endpoint reference from `/invite-codes` to `/invites` |

---

## API / Interface Changes

### Modified Endpoints

- `POST /invites` — new request fields: `email`, `assigned_plan`, `trial_duration_days`.
- `GET /invites` — new response fields: `email`, `assigned_plan`, `trial_duration_days`, `email_sent_at`, `has_trial`, `email_sent`.
- `GET /admin/users/{id}` — enriched response with account/subscription/recent activity details.

### New Endpoints

- `PUT /admin/users/{id}/subscription/plan`
- `PUT /admin/users/{id}/subscription/extend-trial`

---

## Implementation Order

1. Migration 030 (invite code fields)
2. Model update (invite_code.py)
3. Resend integration (email.py, config.py, template, requirements.txt)
4. Backend schemas (invite_code, subscription, user_detail)
5. Backend API (invite.py, auth.py, admin.py, deps.py)
6. Backend tests
7. Frontend types + API client
8. Frontend invite codes page enhancement
9. Frontend user detail page
10. End-to-end testing

---

## Test Plan

### Backend Tests

1. Invite create with `assigned_plan` + `trial_duration_days` persists correctly.
2. Invite create with email — Resend success sets `email_sent_at`.
3. Invite create with email — Resend failure still returns 201, does not set `email_sent_at`.
4. Registration with invite applies correct subscription plan/status/period fields.
5. Registration with optional invite (`REQUIRE_INVITE_CODE=false`) still applies plan/trial when code provided.
6. Expired trial auto-downgrades on authenticated request.
7. Admin plan update endpoint updates subscription + creates audit log.
8. Admin extend-trial endpoint converts/extends correctly + creates audit log.
9. Enriched `GET /admin/users/{id}` returns expected shape and list-size caps (10 sessions, 10 audit logs).
10. Trial duration validation rejects values outside 1–90 range.
11. Free plan invite rejects trial_duration_days (consistency guard).

### Frontend Verification

1. Create invite with email + plan + trial from admin UI.
2. Confirm invite table renders recipient/plan/trial/email-sent columns.
3. Open user detail from users table (click row).
4. Change plan and extend trial from detail page.
5. Confirm updated values refresh in UI.
6. `cd frontend && npm run build` passes.

### Commands

```
cd backend && pytest --override-ini="addopts="
cd frontend && npm run build
```

---

## Risks and Mitigations

| Risk | Mitigation |
|------|-----------|
| Endpoint drift (`/invite-codes` vs `/invites`) | Update CLAUDE.md and admin API client. Verify all admin invite calls use `/invites`. |
| Subscription side-effects in auth/deps | Centralize trial-expiry logic. Cover with targeted tests. |
| Payload growth for user detail | Cap related arrays at 10 items, include total counts. |
| Email provider outages | Best-effort send with logging. Invite creation never fails due to email. |
| DNS not configured for Resend | Document as prerequisite. Email gracefully degrades when API key missing. |
| `subscription.py` may already exist | Verify before creating. Extend if present, create if not. |
| JWT session outlives trial expiry | Acceptable for beta. Document as known limitation. |

---

## Rollout

1. Deploy migration and backend changes.
2. Validate admin invite creation and registration path in staging.
3. Deploy frontend with new invite/user-detail UI.
4. Monitor audit logs and invite email delivery behavior post-release.

---

## Assumptions

- Existing admin access control (`require_admin`) remains unchanged.
- Plan limits for `free/pro/team` are already configured in `plan_limits`.
- No mandatory template engine addition is required for email template rendering.
- Alembic `env.py` already imports `InviteCode` model (per LESSONS-LEARNED.md).
