# Bug Fix: Node Form, Device Status, & Peer Config

## TL;DR

> **Quick Summary**: Fix 5 bugs in NexusGuard dashboard-ui + server-core terkait node registration form, device online/offline status, peer address netmask, advanced options, dan editable wg.conf view. Plus fix 3 critical bugs uncovered by Metis review (IPAM string comparison, share.go prefix, Update handler gap).
>
> **Deliverables**:
> - Single input IP Pool + Interface Address dengan available IP counter
> - Fix peer Address menggunakan pool netmask (bukan /32)
> - Advanced Options collapsible + Table default "Off"
> - Editable wg.conf view (safe, validated)
> - Device status akurat (Online hanya jika benar-benar konek)
> - IPAM exclusion bug fixed (server IP tidak di-override peer)
>
> **Estimated Effort**: Medium (10-14 tasks across 3 waves)
> **Parallel Execution**: YES — 3 waves
> **Critical Path**: IPAM fix → Backend fixes → Frontend fixes → wg.conf feature

---

## Context

### Original Request
5 bugs diidentifikasi user:
1. IP Pool CIDR + Interface Address jadi 1 input (dengan available IP count)
2. Peer Address tidak pakai netmask pool (selalu /32)
3. Advanced Options tidak collapsible + Table default "auto"
4. Tidak ada editable raw wg.conf view
5. Device status selalu Online meskipun tidak konek

### Metis Review — Critical Findings
**3 bugs uncovered yang harus diperbaiki bersamaan**:

| # | Bug | Lokasi | Dampak |
|---|-----|--------|--------|
| C1 | **IPAM string comparison mismatch** | `ipam/manager.go:87-94 vs 107` | `interface_address` tersimpan sebagai `"10.8.0.1/24"` tapi dibandingkan dengan `"10.8.0.1"` (tanpa prefix). Server's own IP **tidak pernah dikecualikan** → peer bisa dapat IP yang sama dengan server → IP conflict |
| C2 | **share.go juga hardcode /32** | `share.go:63` | Sama seperti peers.go, share link juga generate Address dengan /32 |
| C3 | **Update handler tidak recalculate InterfaceAddress** | `servers.go:321-326` | Create handler auto-calc InterfaceAddress, tapi Update handler tidak. Ganti IPPoolCIDR saat edit → InterfaceAddress stale |

### Konfirmasi dari User
- **IP single input**: ✅ Sepakat. `10.172.20.1/24` → pool=`10.172.20.0/24`, interface=`10.172.20.1/24`
- **Advanced collapsible + Table=Off**: ✅ Keduanya
- **Editable wg.conf**: ✅ Editable, harus aman. wg.conf tidak ada sebagai file fisik (generated config via wgctrl)
- **Device status**: User tidak tahu apakah pakai Redis. Device-agent pakai official WG client

---

## Work Objectives

### Core Objective
Memperbaiki 5 bugs dashboard-ui + server-core + 3 critical bugs dari Metis review.

### Concrete Deliverables
1. **Servers.vue**: Form register/edit node — single IP input + available count
2. **peers.go + share.go**: Peer Address pakai pool netmask (bukan /32)
3. **ipam/manager.go**: Fix string comparison untuk interface_address exclusion
4. **Servers.vue**: Advanced Overrides collapsible + Table default "Off"
5. **PeerConfigModal.vue**: Editable wg.conf + safe Apply
6. **models.go + peers.go + devices.go + heartbeat/redis.go**: IsActive default false

### Must Have
- [x] IPAM tidak lagi mengalokasikan IP yang sama dengan server's interface_address
- [x] Edit node dengan mengubah IPPoolCIDR → InterfaceAddress otomatis recalculate
- [x] Single input IP/Prefix menolak network address (x.x.x.0/24) dan broadcast
- [x] Peer Address di config menggunakan netmask dari pool, bukan /32
- [x] Device baru muncul sebagai "Offline" sampai heartbeat pertama
- [x] Advanced Overrides collapsible (default tertutup) di create + edit form
- [x] Table default "Off" untuk server baru
- [x] Editable wg.conf view dengan validasi keamanan

### Must NOT Have (Guardrails)
- **JANGAN** ubah struktur kolom DB WgServer (merge hanya UI-level, backend tetap 2 field)
- **JANGAN** ubah AllowedIPs /32 di [Peer] section (hanya Address di [Interface])
- **JANGAN** deduplikasi config generator (scope creep)
- **JANGAN** izinkan edit PrivateKey/PresharedKey tanpa warning
- **JANGAN** tambahkan DB migration untuk backfill Table/IsActive existing
- **JANGAN** `nft flush table` atau ubah behavior firewall
- **JANGAN** log plaintext keys

---

## Verification Strategy

### Test Decision
- **Infrastructure exists**: YES (bun test + vitest di dashboard-ui)
- **Automated tests**: NO (bug fix, verification via QA scenarios)
- **Framework**: vitest (existing)

### QA Policy
Setiap task diverifikasi oleh agent (agent-executed QA). Tidak ada verifikasi manual.

- **Frontend**: Playwright — navigasi form, input data, assert DOM
- **API**: Bash (curl) — send requests, assert JSON response
- **Backend**: Bash (go run) — test specific functions if needed

---

## Execution Strategy

### Parallel Execution Waves

```
Wave 1 (Backend Foundation — IPAM + Model Fixes):
├── Task 1: Fix IPAM string comparison (ipam/manager.go) [quick]
├── Task 2: Fix Update handler recalculate InterfaceAddress (servers.go) [quick]
├── Task 3: Change GORM defaults — IsActive=false + Table=off (models.go) [quick]
├── Task 4: Fix SyncToDB isActive default (heartbeat/redis.go) [quick]
├── Task 5: Remove IsActive:true hardcode from CreatePeer + Devices.Create (peers.go, devices.go) [quick]
└── Task 6: Fix peer Address to use pool netmask (peers.go + share.go) [quick]

Wave 2 (Frontend — Form + UI Changes):
├── Task 7: Merge IP Pool + Interface Address jadi 1 input + available IP count (Servers.vue) [visual-engineering]
├── Task 8: Advanced Overrides collapsible + Table default "Off" (Servers.vue) [visual-engineering]
├── Task 9: Device status UI — handle IsActive=false untuk new device (Devices.vue, DeviceDetail.vue) [quick]

Wave 3 (wg.conf Editable View):
├── Task 10: Editable wg.conf textarea + backend validation endpoint (PeerConfigModal.vue + peers.go) [unspecified-high]
```

---

## TODOs

- [x] 1. Fix IPAM string comparison — strip prefix dari interface_address

  **What to do**:
  - Di `ipam/manager.go:AllocateIPFromCIDR()` (line 87-107): saat `Pluck("interface_address", &serverIPs)`, data yang didapat format `"10.8.0.1/24"` (dengan prefix)
  - Saat dimasukkan ke `usedMap` (line 94): `usedMap["10.8.0.1/24"] = true`
  - Tapi perbandingan (line 107): `if !usedMap[ip.String()]` — `ip.String()` = `"10.8.0.1"` (tanpa prefix)
  - String `"10.8.0.1/24"` ≠ `"10.8.0.1"` → server IP tidak pernah match → peer bisa dapat IP server
  - Fix: Parse `interface_address` ambil IP saja sebelum masuk `usedMap`
  - Juga fix di `AllocateIP()` (line 39-46) — masalah yang sama

  **Must NOT do**:
  - Jangan ubah logika increment IP atau skip broadcast
  - Jangan tambah field baru ke model

  **Recommended Agent Profile**:
  - Category: `quick`
  - Skills: []

  **Parallelization**:
  - Can Run In Parallel: YES
  - Blocks: Tasks 7 (backend change untuk single input), Task 6 (peer fix)
  - Blocked By: None

  **References**:
  - `apps/server-core/internal/ipam/manager.go:73-116` — AllocateIPFromCIDR function
  - `apps/server-core/internal/ipam/manager.go:30-71` — AllocateIP function (same bug)
  - `apps/server-core/internal/ipam/manager.go:123-133` — `IsAvailable` already handles prefix correctly (pattern to follow)
  - `apps/server-core/internal/models/models.go:35-36` — IPPoolCIDR and InterfaceAddress field definitions

  **Acceptance Criteria**:
  - [ ] Server with InterfaceAddress `10.8.0.1/24` → IPAM tidak mengalokasikan `10.8.0.1`
  - [ ] Server with InterfaceAddress `10.8.0.1/24` → IPAM bisa alokasikan `10.8.0.2` (tersedia)

  **QA Scenarios**:
  ```
  Scenario: Verify server interface IP excluded from allocation
    Tool: Bash (curl)
    Preconditions: DB has server with IPPoolCIDR="10.8.0.0/24", InterfaceAddress="10.8.0.1/24"
    Steps:
      1. curl -s -X POST /api/v1/peers -H "Authorization: Bearer $TOKEN" -d '{"name":"test-peer","wg_server_id":"$SERVER_ID"}'
      2. Parse response JSON → get device.InternalIP
    Expected Result: InternalIP != "10.8.0.1" (server IP not allocated to peer)
    Failure Indicators: Peer gets 10.8.0.1
    Evidence: .sisyphus/evidence/task-1-ipam-fix.json
  ```

- [x] 2. Fix Update handler — recalculate InterfaceAddress saat IPPoolCIDR berubah

  **What to do**:
  - Di `api/servers.go:321-326` (Update handler):
  - Saat ini hanya: `if req.InterfaceAddress != nil { server.InterfaceAddress = *req.InterfaceAddress }`
  - Tambahkan: jika `req.IPPoolCIDR != nil && req.InterfaceAddress == nil` → auto-calculate seperti Create handler (line 162-171)
  - Extract logika auto-calc ke helper function untuk reuse

  **Must NOT do**:
  - Jangan trigger auto-calc jika InterfaceAddress juga dikirim (user ingin override manual)

  **Parallelization**:
  - Can Run In Parallel: YES
  - Blocks: Task 7 (single input tergantung backend)
  - Blocked By: None

  **References**:
  - `apps/server-core/api/servers.go:162-171` — Create handler auto-calc logic (pattern to copy)
  - `apps/server-core/api/servers.go:278-365` — Update handler (current behavior to fix)

  **Acceptance Criteria**:
  - [ ] PUT /servers/{id} with `{"ip_pool_cidr": "10.9.0.0/24"}` → InterfaceAddress berubah jadi `10.9.0.1/24`
  - [ ] PUT /servers/{id} with `{"ip_pool_cidr": "10.9.0.0/24", "interface_address": "10.9.0.5/24"}` → InterfaceAddress = `10.9.0.5/24` (manual override)

- [x] 3. Change GORM defaults — IsActive=false + Table=off

  **What to do**:
  - `models.go:37`: `Table string \`...default:'auto'\`` → `default:'off'`
  - `models.go:70`: `IsActive bool \`gorm:"default:true"\`` → `default:false`

  **Parallelization**:
  - Can Run In Parallel: YES
  - Blocks: Tasks 4, 5, 9
  - Blocked By: None

  **References**:
  - `apps/server-core/internal/models/models.go:37` — Table field
  - `apps/server-core/internal/models/models.go:70` — IsActive field

- [x] 4. Fix SyncToDB — isActive default false instead of true

  **What to do**:
  - `heartbeat/redis.go:67` — change `isActive := true` to `isActive := false`
  - Device dianggap offline sampai Redis membuktikan online

  **Parallelization**:
  - Can Run In Parallel: YES (with Task 5)
  - Blocked By: Task 3 (model default change)

  **References**:
  - `apps/server-core/internal/heartbeat/redis.go:57-84` — SyncToDB function

- [x] 5. Remove IsActive:true hardcode dari CreatePeer + Devices.Create

  **What to do**:
  - `peers.go:99`: Hapus `IsActive: true` dari struct literal (gunakan default dari model)
  - `devices.go:118` (perlu cek): Hapus `IsActive: true` yang hardcode

  **Must NOT do**:
  - Jangan set IsActive: false secara eksplisit — biarkan GORM default (yang sudah diubah ke false)

  **Parallelization**:
  - Can Run In Parallel: YES (with Task 4)
  - Blocked By: Task 3 (model default change)

  **References**:
  - `apps/server-core/api/peers.go:89-103` — Device creation struct
  - `apps/server-core/api/devices.go` — Devices handler

- [x] 6. Fix peer Address — gunakan pool netmask (bukan /32)

  **What to do**:
  - `peers.go:133`: `Address = %s/32` → parse `wgServer.IPPoolCIDR`, ambil `ones` (netmask bits), gunakan `%s/%d`
  - `peers.go:205`: Sama di `getDeviceConfig` — `Address = %s/32` → pool netmask
  - `share.go:63`: Sama — `Address = %s/32` → pool netmask
  - Fallback: jika `IPPoolCIDR` kosong, tetap gunakan `/32`
  - Hanya ubah `Address` di `[Interface]`, jangan ubah `AllowedIPs` di `[Peer]`

  **Must NOT do**:
  - JANGAN ubah AllowedIPs `/32` untuk non-internet peers (itu untuk routing, bukan interface address)

  **Parallelization**:
  - Can Run In Parallel: YES
  - Blocked By: None (tapi idealnya setelah Task 1)

  **References**:
  - `apps/server-core/api/peers.go:131-147` — CreatePeer config generation
  - `apps/server-core/api/peers.go:203-225` — getDeviceConfig config generation
  - `apps/server-core/api/share.go` — Share link config generation

  **Acceptance Criteria**:
  - [ ] Peer dengan server pool `10.8.0.0/24` → Address = `10.8.0.2/24` (bukan /32)
  - [ ] Server tanpa pool (kosong) → Address = `x.x.x.x/32` (fallback)

- [x] 7. Merge IP Pool + Interface Address jadi 1 input + available IP count

  **What to do**:
  - **Create form** (`Servers.vue`):
    - Hapus 2 field terpisah (IP Pool CIDR + Interface Address)
    - Tambah 1 field baru: `Interface IP / Prefix` dengan placeholder `10.172.20.1/24`
    - Saat user mengetik, parse: extract IP untuk interface, extract network untuk pool
    - Update `v-model` dan `handleAdd` untuk kirim `ip_pool_cidr` + `interface_address` ke API (backend tetap 2 field)
    - Tampilkan info: "254 Available IPs" (dihitung dari prefix)
    
  - **Edit form** (`Servers.vue` openEdit):
    - Reconstruct single input dari existing `srv.IPPoolCIDR` + `srv.InterfaceAddress`
    - Format: extract IP dari InterfaceAddress + prefix dari IPPoolCIDR
    - Contoh: pool=`10.8.0.0/24`, interface=`10.8.0.1/24` → input=`10.8.0.1/24`

  - **Validasi**:
    - Tolak jika IP adalah network address (`10.172.20.0/24`)
    - Tolak jika IP adalah broadcast (`10.172.20.255/24`)
    - Tolak jika prefix < /24 (too large) atau > /32 (no usable IPs)
    - Tampilkan error message jelas di form

  - **Available IP Count**:
    - Hitung: `2^(32-prefix) - 2` (network + broadcast)
    - Tampilkan sebagai teks di bawah input: "254 available IP addresses"
    - Update otomatis saat user mengubah prefix

  - **Backend**: Tidak ada perubahan model — UI memparse dan mengirim ke 2 field yang ada

  **Must NOT do**:
  - JANGAN ubah model `WgServer` (tetap 2 kolom terpisah di DB)
  - JANGAN hapus API backward compatibility (endpoint masih terima `ip_pool_cidr` + `interface_address`)

  **Parallelization**:
  - Can Run In Parallel: NO (dengan Task 1-6)
  - Blocked By: Task 2 (backend recalculate handler)

  **References**:
  - `apps/dashboard-ui/src/views/Servers.vue:48-55,186-192` — Current form fields
  - `apps/dashboard-ui/src/views/Servers.vue:265-284,295-300` — Form data models
  - `apps/dashboard-ui/src/views/Servers.vue:368-404` — handleAdd function
  - `apps/dashboard-ui/src/views/Servers.vue:302-358` — openEdit + handleEditSave
  - `apps/dashboard-ui/src/api/servers.ts:33-36` — createServer API call

  **Acceptance Criteria**:
  - [ ] Input `10.172.20.1/24` → IP Pool = `10.172.20.0/24`, Interface = `10.172.20.1/24`
  - [ ] Input `10.172.20.0/24` → error "Network address tidak valid untuk interface"
  - [ ] Input `10.172.20.255/24` → error "Broadcast address tidak valid"
  - [ ] Tampilkan "254 available IP addresses" untuk /24, "126" untuk /25
  - [ ] Edit form menunjukkan existing server sebagai `{ip}/{prefix}`

- [x] 8. Advanced Overrides collapsible + Table default "Off"

  **What to do**:
  - Tambahkan `showAdvanced` ref (default `false`) seperti di DeviceDetail.vue
  - Bungkus section Advanced Overrides (`Servers.vue:63-91` dan `195-222`) dengan toggle:
    ```html
    <button @click="showAdvanced = !showAdvanced" class="...">
      <span>Advanced Overrides</span>
      <span :class="showAdvanced ? 'rotate-180' : ''">▼</span>
    </button>
    <div v-if="showAdvanced" class="...">
      <!-- existing advanced fields -->
    </div>
    ```
  - **Create form**: Ubah `form.value.table = 'auto'` → `'off'` (line 275)
  - **Edit form**: Ubah `editForm.value.table = 'auto'` → `'off'` (line 297, 313)
    - `srv.Table || 'auto'` → `srv.Table || 'off'`
  - **handleEditSave**: Kirim table hanya jika ada perubahan: `table: editForm.value.table === 'off' ? undefined : 'auto'`
    - Sebenarnya: kalau default 'off', tidak perlu kirim jika 'off' (biar undefined)
    - Tapi kalau user pilih 'auto', kirim 'auto'

  **Must NOT do**:
  - JANGAN tambah migration untuk backfill existing server
  - JANGAN ubah validasi form yang sudah ada

  **Parallelization**:
  - Can Run In Parallel: YES (with Task 7)
  - Blocked By: None

  **References**:
  - `apps/dashboard-ui/src/views/Servers.vue:63-91` — Create form advanced section
  - `apps/dashboard-ui/src/views/Servers.vue:195-222` — Edit form advanced section  
  - `apps/dashboard-ui/src/views/DeviceDetail.vue:42-72` — Collapsible pattern to follow
  - `apps/dashboard-ui/src/views/Servers.vue:275,297,313` — Current table defaults

  **Acceptance Criteria**:
  - [ ] Advanced Overrides section collapsible dengan toggle chevron
  - [ ] Section tertutup secara default
  - [ ] Nilai di dalam section tetap terkirim saat save meski section tertutup
  - [ ] Create server baru → Table = "off" secara default
  - [ ] Edit server → Table = "off" jika belum pernah diubah

- [x] 9. Device status UI — handle IsActive=false untuk device baru

  **What to do**:
  - **Devices.vue:29-33**: Status badge sudah menggunakan `device.IsActive ? 'Online' : 'Offline'`
  - Dengan fix di Task 3-5, device baru akan muncul sebagai "Offline" — ini yang benar
  - Opsional: Tambah deteksi "Unknown" untuk device tanpa heartbeat sama sekali
    - Cek `device.LastHandshake` — jika zero value (`0001-01-01` atau `null`) → "Unknown" / "Pending"
    - Tapi ini nice-to-have, minimal fix cukup dengan IsActive=false

  **Parallelization**:
  - Can Run In Parallel: YES (with Tasks 7, 8)
  - Blocked By: Tasks 3, 4, 5 (model default + remove hardcode)

  **References**:
  - `apps/dashboard-ui/src/views/Devices.vue:29-33` — Status display
  - `apps/dashboard-ui/src/views/DeviceDetail.vue:12-14` — Status badge

- [x] 10. Editable wg.conf view + backend validation endpoint

  **What to do**:
  - **Frontend** (`PeerConfigModal.vue`):
    - Ubah textarea dari `readonly` menjadi editable
    - Hapus `resize-none` + `select-all`, tambah class agar bisa diedit
    - Tambah tombol "Save & Apply" + "Cancel" (reset ke generated config)
    - Tambah confirmation dialog jika edit PrivateKey/PresharedKey

  - **Backend** (new endpoint atau extend existing):
    - `PUT /devices/{id}/config` atau extend `PUT /devices/{id}`
    - Validate:
      - Parse WireGuard INI format
      - Valid base64 keys
      - Valid CIDR untuk Address
      - Valid endpoint format
    - Safe fields-only update:
      - Parse config → extract: DNS, MTU, PersistentKeepalive, AllowedIPs
      - **JANGAN izinkan** update PrivateKey, PresharedKey, Address (internal IP)
      - Jika user mengubah field terlarang → reject with error message
    - Update DB fields → regenerate config
    - Return updated config_text

  - **Error handling**:
    - Parse error → tampilkan "Invalid config format: {detail}"
    - Rejected field → "Cannot change PrivateKey via config editor. Use 'Regenerate Keys' feature."
    - Network error → "Failed to save config. Check your connection."

  **Must NOT do**:
  - JANGAN izinkan edit PrivateKey/PresharedKey tanpa warning + confirmation
  - JANGAN simpan raw config text (parse ke DB fields)
  - JANGAN trigger restart WireGuard interface

  **Parallelization**:
  - Can Run In Parallel: NO
  - Blocked By: Task 6 (pool netmask fix — config format berubah)

  **References**:
  - `apps/dashboard-ui/src/components/PeerConfigModal.vue` — Config modal (read-only saat ini)
  - `apps/dashboard-ui/src/components/AddPeerModal.vue:20-24` — Config text area pattern
  - `apps/server-core/api/peers.go:155-225` — getDeviceConfig (config generation)
  - `apps/server-core/api/peers.go:131-147` — CreatePeer config pattern

  **Acceptance Criteria**:
  - [ ] Textarea bisa diedit (tidak readonly)
  - [ ] Edit AllowedIPs → Apply → config berubah
  - [ ] Edit PrivateKey → warning muncul → user bisa cancel
  - [ ] Config tidak valid → error message muncul

---

## Final Verification Wave

- [x] F1. **Plan Compliance Audit** — `oracle`
  Verify: IPAM fix applied, all 5 bugs addressed, no scope creep

- [x] F2. **Code Quality Review** — `unspecified-high`
  Run `tsc --noEmit` + `bun test`, check for unused imports, console.log

- [x] F3. **Real Manual QA** — `unspecified-high` (+ playwright)
  Execute QA scenarios for all 10 tasks. Test cross-task integration.

- [x] F4. **Scope Fidelity Check** — `deep`
  Verify: Must Have checklist complete, Must NOT compliance

---

## Commit Strategy

- **1-5**: `fix(server-core): ipam fix + isactive default + update handler`
- **6**: `fix(server-core): peer address uses pool netmask`
- **7-9**: `fix(dashboard-ui): node form merge + advanced collapse + status`
- **10**: `feat(dashboard-ui): editable wg.conf view with safe apply`

---

## Success Criteria

### Final Checklist
- [x] Server yang InterfaceAddress-nya `10.8.0.1/24` — peer tidak dapat IP `10.8.0.1`
- [x] Single input `10.172.20.1/24` → IP Pool `10.172.20.0/24`, Interface `10.172.20.1/24`
- [x] Peer Address di config: `10.172.20.2/24` (mengikuti pool netmask)
- [x] Advanced Overrides collapsible + Table default "Off"
- [x] Editable wg.conf view dengan validasi
- [x] Device baru: "Offline" sampai heartbeat pertama
- [x] `10.172.20.0/24` — tolak sebagai network address
