# TASK: Phase 1 — Authentication, Persistence & Settings Page

**Version target:** 0.7.0
**Repo:** `deploy-felhom-compose` (controller)

## Overview

Three workstreams in this phase:
1. Implement login/logout authentication for the controller dashboard
2. Persist DB validation results across container restarts
3. Add "Beállítások" (Settings) page with config display and password change

All user-editable state is stored in a single `settings.json` file at:
`/opt/docker/felhom-controller/data/settings.json`

This path is already bind-mounted into the container (the `data/` dir holds `restic-password` etc.).
The controller.yaml config remains the source of truth for operator-provisioned values;
`settings.json` holds customer-modifiable overrides.

---

## 1. settings.json — Shared Persistence Layer

### 1.1 Create `internal/settings/settings.go`
```
File: controller/internal/settings/settings.go
```

Define the settings struct and load/save logic:
```go
type Settings struct {
    mu sync.RWMutex `json:"-"`

    // Auth
    PasswordHash string `json:"password_hash,omitempty"` // bcrypt hash, overrides controller.yaml

    // Notification preferences (Phase 2 — define struct now, leave empty)
    Notifications *NotificationPrefs `json:"notifications,omitempty"`

    // Cached state
    DBValidations map[string]DBValidationCache `json:"db_validations,omitempty"`
}

type NotificationPrefs struct {
    // placeholder for Phase 2
}

type DBValidationCache struct {
    ValidatedAt string `json:"validated_at"`          // RFC3339
    TableCount  int    `json:"table_count"`
    HasHeader   bool   `json:"has_header"`
    Error       string `json:"error,omitempty"`
}
```

**Behavior:**
- `Load(path string) (*Settings, error)` — reads file, returns empty Settings{} if file doesn't exist (not an error)
- `Save() error` — atomic write (write to `.tmp`, rename). Path stored internally from Load.
- Use `sync.RWMutex` for concurrent access (backup goroutine writes validations, web reads them)
- Log on every save: `[DEBUG] Settings saved to <path>`

**File location:** The controller's docker-compose.yml already mounts `./data:/opt/docker/felhom-controller/data`.
The settings file path should be passed to the Settings manager on init.

**Testing:** On startup, if file doesn't exist, log `[INFO] No settings.json found, using defaults`. Do NOT create the file until something actually needs saving.

---

## 2. Authentication (Login / Logout)

### 2.1 Password resolution

The effective password hash is determined with this priority:
1. `settings.json` → `password_hash` (customer changed it)
2. `controller.yaml` → `web.password_hash` (operator provisioned)
3. Empty string → no auth required (current testing behavior)

On startup, log which source is active:
```
[INFO] Auth: using password from settings.json
[INFO] Auth: using password from controller.yaml
[INFO] Auth: no password configured — dashboard is open
```

### 2.2 Session management

Use a **signed session cookie** approach (not just `"authenticated"` string):
- Generate a random 32-byte session secret on startup (store in memory only, not persisted — restarts invalidate sessions, which is fine)
- Cookie name: `felhom_session`
- Cookie value: `<expiry_unix>.<hmac_sha256_hex>` — HMAC of expiry timestamp with session secret
- `HttpOnly: true`, `SameSite: Strict`, `Secure: false` (local network, self-signed certs)
- `MaxAge: 7 days` (configurable later)
- `Path: /`

### 2.3 Routes

Add to `internal/web/server.go` routing:

| Method | Path        | Auth? | Handler            |
|--------|-------------|-------|--------------------|
| GET    | `/login`    | No    | Show login form    |
| POST   | `/login`    | No    | Validate + set cookie + redirect to `/` |
| GET/POST | `/logout` | No    | Clear cookie + redirect to `/login` |

**Auth middleware** (wrap all routes except `/login`, `/logout`, `/style.css`, `/assets/*`, `/api/*`):
- Check `felhom_session` cookie → validate HMAC + check expiry
- If invalid/missing → redirect to `/login` (for browser) or return 401 (for API)
- If no password configured → pass through (no auth)

### 2.4 Login page template
```
File: controller/internal/web/templates/login.html
```

- Standalone page (no sidebar), same dark theme as rest of dashboard
- Felhom logo centered at top
- Single password field + "Bejelentkezés" button
- On error: "Hibás jelszó" message (red, below form)
- Customer name shown below logo (from config)
- No username field — single-user system

### 2.5 Logout

- `GET /logout` or `POST /logout` → set cookie MaxAge=-1 → redirect to `/login`
- Add logout link to sidebar bottom (near version display):
```
  <version> | Kijelentkezés
```
  Only show "Kijelentkezés" if auth is enabled.

### 2.6 Edge cases

- If password_hash is empty in both sources → no auth, no login page, no logout link
- If user is on a page and session expires → next request redirects to `/login`, after login redirect back to original page (use `?next=/backups` query param)
- Cookie cleared on logout must work even if server secret rotated (clear by MaxAge=-1)

---

## 3. DB Validation Persistence

### 3.1 Problem

After container restart, the backup page "Érvényesítés" column shows "–" for all databases until the next backup cycle runs validation. The v0.6.2 cross-check helps once RefreshCache runs, but the initial load after restart still shows no data.

### 3.2 Solution

**On validation completion** (`internal/backup/dbdump.go` → `ValidateDump`):
- After successful validation, save result to `settings.json` via settings package:
```go
  settings.SetDBValidation("immich-postgres.sql", DBValidationCache{
      ValidatedAt: time.Now().Format(time.RFC3339),
      TableCount:  60,
      HasHeader:   true,
  })
  // SetDBValidation acquires write lock, updates map, calls Save()
```

**On startup / RefreshCache** (`internal/backup/backup.go`):
- Load cached validations from `settings.json`
- For each dump file that exists on disk AND has a cached validation:
  - Use the cached validation data
  - Set `DumpValidation.Valid = true/false` based on cached result
  - Set `DumpValidation.Message` to include cached info: e.g., `"60 tábla (utolsó: 08:04)"`
- The next actual validation run overwrites the cache with fresh data

**Important:** The cache is keyed by dump filename (e.g., `immich-postgres.sql`). If a dump file no longer exists, its cached validation is ignored (stale data cleanup).

### 3.3 Template update

No template changes needed — the existing 4-branch guard from v0.6.2 already handles showing validation status correctly. The only difference is now the data will be populated from cache on startup instead of being zero-valued.

---

## 4. "Beállítások" (Settings) Page

### 4.1 Sidebar menu item

Add "Beállítások" as the last menu item, visually separated from the main navigation — placed at the bottom of the sidebar, just above the version/logout section. Use a gear/cog icon (⚙ or SVG).

Sidebar order:
```
Vezérlőpult
Alkalmazások
Biztonsági mentés
Rendszermonitor
─── (spacer / flex-grow) ───
⚙ Beállítások          ← new, pinned to bottom
v0.7.0 | Kijelentkezés
```

### 4.2 Route

| Method | Path        | Auth? | Handler             |
|--------|-------------|-------|---------------------|
| GET    | `/settings` | Yes   | Show settings page  |
| POST   | `/settings/password` | Yes | Change password |

### 4.3 Settings page layout

The page has two sections:

#### Section A: "Rendszer konfiguráció" (System Configuration) — Read-only

Display key values from `controller.yaml` in a clean info-grid. These are read-only — the customer can see what's configured but can't change it here.

| Label (Hungarian)        | Source in controller.yaml        | Display format |
|--------------------------|----------------------------------|----------------|
| Ügyfél azonosító         | `customer.id`                    | `demo-felhom`  |
| Ügyfél neve              | `customer.name`                  | `Demo Ügyfél`  |
| Domain                   | `customer.domain`                | `demo-felhom.eu` |
| Alkalmazás sablon forrás | `git.repo_url`                   | URL (truncated) |
| Sablon szinkronizálás    | `git.sync_interval`              | `15m`          |
| Biztonsági mentés        | `backup.enabled`                 | ✅ Aktív / ❌ Inaktív |
| Mentés ütemezés          | `backup.db_dump_schedule` + `backup.restic_schedule` | `02:30 / 03:00` |
| Monitoring               | `monitoring.enabled`             | ✅ Aktív / ❌ Inaktív |
| Healthchecks URL         | `monitoring.healthchecks_base`   | URL or "–"     |
| Hub jelentés             | `hub.enabled` (if exists)        | ✅ Aktív / ❌ Inaktív / "–" |
| Controller verzió        | built-in Version constant        | `0.7.0`        |

Use green checkmark / red X styling for boolean states, consistent with the backup page.

#### Section B: "Jelszó módosítás" (Change Password) — Editable

Only shown if auth is enabled (password_hash is set). If no auth, show an info message:
"A jelszavas védelem nincs beállítva. Kérd az üzemeltetőt a beállításhoz."

Form fields:
- Jelenlegi jelszó (current password) — required
- Új jelszó (new password) — required, min 8 chars
- Új jelszó megerősítése (confirm new password) — required, must match

**POST `/settings/password` handler:**
1. Validate current password against effective hash (bcrypt compare)
2. Validate new password: min 8 chars, both fields match
3. Generate bcrypt hash (cost 10) for new password
4. Save to `settings.json` → `password_hash`
5. Invalidate current session (regenerate session secret so all cookies become invalid)
6. Redirect to `/login` with success flash message: "Jelszó sikeresen módosítva. Kérjük, jelentkezzen be az új jelszóval."

**Error handling:**
- Wrong current password → "Hibás jelenlegi jelszó" (stay on page)
- Passwords don't match → "A két jelszó nem egyezik"
- Too short → "A jelszónak legalább 8 karakter hosszúnak kell lennie"
- Show errors inline, don't clear form

### 4.4 Template
```
File: controller/internal/web/templates/settings.html
```

Follow the same card-based layout as the backup page. Two cards:
1. "Rendszer konfiguráció" — info-grid with labels + values
2. "Jelszó módosítás" — form card

---

## 5. Implementation Order

Follow this sequence to keep each step testable:

### Step 1: settings.json package
- Create `internal/settings/settings.go` with Settings struct, Load/Save
- Add settings instance to the controller's main app struct
- Load on startup, log result
- **Test:** Start controller, check logs for settings load message

### Step 2: Authentication
- Add session secret generation on startup
- Add auth middleware
- Add login.html template
- Add login/logout handlers
- Add logout link to sidebar
- Wire up routes in server.go
- Set `web.password_hash` in controller.yaml on demo to test
- **Test:** Navigate to dashboard → redirected to /login → enter password → dashboard loads → /logout → back to /login

### Step 3: DB validation persistence
- After ValidateDump completes, save results to settings.json
- On RefreshCache, load cached validations for initial display
- **Test:** Deploy apps with DBs → trigger backup → check Érvényesítés column shows data → restart container → check column still shows data

### Step 4: Settings page
- Add settings.html template
- Add settings route + handler
- Add sidebar menu item with bottom-pinning
- Implement password change POST handler
- **Test:** Open /settings → see config values → change password → re-login with new password

### Step 5: Cleanup & version bump
- Update CONTEXT.md
- Bump version to 0.7.0
- Build + deploy + verify on demo-felhom.eu

---

## 6. Files to Create / Modify

### New files:
- `controller/internal/settings/settings.go` — Settings persistence
- `controller/internal/web/templates/login.html` — Login page
- `controller/internal/web/templates/settings.html` — Settings page

### Modified files:
- `controller/internal/web/server.go` — Add auth middleware, new routes (/login, /logout, /settings, /settings/password), session management, settings page handler
- `controller/internal/web/templates/` sidebar partial or base template — Add "Beállítások" menu item at bottom, logout link
- `controller/internal/backup/backup.go` — Load cached validations in RefreshCache
- `controller/internal/backup/dbdump.go` — Save validation results to settings.json
- `controller/internal/config/config.go` — Possibly add data_dir path helper
- `controller/cmd/controller/main.go` — Initialize settings, pass to web server and backup manager

---

## 7. Design Decisions & Notes

### Why settings.json (not SQLite)?
- Single file, human-debuggable, easy to backup/restore
- Tiny data volume (password hash + a few validation entries)
- No query needs — just load/save whole struct
- Customers or operators can inspect/reset it easily

### Why not modify controller.yaml for password changes?
- controller.yaml is operator-provisioned config, risky to programmatically rewrite YAML
- settings.json is a clean override layer: operator sets initial password in yaml, customer changes it in json
- If settings.json is deleted, system falls back to controller.yaml password (recovery path)

### Session secret is ephemeral (memory only)
- Container restart = all sessions invalidated = users must re-login
- This is acceptable and actually desirable for security
- No need to persist session state

### Notifications (Phase 2 prep)
- The Settings struct includes a `Notifications` field placeholder
- Phase 2 will add: email relay via k3s (similar to contact-mailer pattern), notification preferences UI
- The relay approach: customer controller sends HTTP POST to a central notification API on k3s, which handles Resend delivery. Avoids storing Resend API keys on customer hardware.
- This keeps secrets centralized and customer nodes lightweight.

### Settings page scope — what goes where
- "Beállítások" = actual settings (things the user can configure or needs to know about their setup)
- "Rendszermonitor" = live system state (hostname, uptime, CPU, RAM, disk, Docker containers)
- No overlap — config is static, monitoring is dynamic