# iOS PWA Push Notification Testing Guide

Debugging web push notifications for the shark game on iOS.

## Setup

1. Load the test page at https://shark.iamgmb.com/push-test.html
2. Share -> "Add to Home Screen"
3. Open from home screen (not from Safari browser tab)

## Expected subscription flow

```
Browser supports push -> SW registered -> Permission granted -> Push subscribed -> Subscription sent to server
```

## If subscribe succeeds but banner is invisible

The push opt-in `<div id="pushBanner" style="display:none">` is hardcoded hidden in HTML. The `showNotificationBanner()` function must call `banner.style.display = 'block'` — without this explicit line, the banner state variable changes but the UI never reveals the prompt.

**Check:** Does `showNotificationBanner()` have `banner.style.display = 'block';` at the top of the function body?

## iOS PWA push limitation

PushManager is NOT available in Safari's browser tab on iOS. The `FAIL: No PushManager` error is expected behavior on iPhone Safari. The user MUST:**

1. Tap Share -> "Add to Home Screen"
2. Open from home screen (PWA mode, fullscreen, no URL bar)
3. Then push subscription works via Apple Push Service (APNs)

## Common subscription failures
The `user_id` column has a FK constraint to `users.id`. Test subscriptions use `user_id: NULL` — ensure the column allows NULL and the subscribe-noauth endpoint passes NULL.

Fix:
```sql
-- Rebuild table with nullable user_id
CREATE TABLE push_subscriptions_new (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    user_id INTEGER,
    endpoint TEXT NOT NULL UNIQUE,
    p256dh TEXT NOT NULL,
    auth TEXT NOT NULL,
    created_at TEXT DEFAULT (datetime('now'))
);
INSERT INTO push_subscriptions_new SELECT * FROM push_subscriptions;
DROP TABLE push_subscriptions;
ALTER TABLE push_subscriptions_new RENAME TO push_subscriptions;
```

### Server rejected subscription
Check that the subscribe-noauth endpoint exists and accepts the POST body:
```json
{"endpoint": "https://...", "p256dh": "...", "auth": "..."}
```

## Test send after subcription

```bash
curl -s -X POST https://shark.iamgmb.com/api/push/test \
  -H "Content-Type: application/json" \
  -d '{}'
```

Expected: `{"sent": 1}`
Failure: `{"sent": 0}` — check journald for `Push test failed: ...`

## Debugging database

```bash
sqlite3 /root/shark-game/backend/game.db "SELECT count(*) FROM push_subscriptions;"
sqlite3 /root/shark-game/backend/game.db "SELECT id, endpoint FROM push_subscriptions;"
```