# n8n 整合範例

## 基本設定

### API 端點
- **Base URL:** `http://localhost:3002/api/v1`
- **Method:** `POST`
- **Content-Type:** `application/json`

---

## Workflow 1: 基礎搜尋

### Trigger: Manual / Webhook

```
[Manual Trigger] 
     ↓
[HTTP Request] → POST http://localhost:3002/api/v1/search
     ↓
[Set] → 設定搜尋詞 "charade"
     ↓
[Code] → 處理回傳結果
     ↓
[Respond]
```

### HTTP Request 設定
```json
{
  "url": "http://localhost:3002/api/v1/search",
  "method": "POST",
  "body": {
    "query": "={{ $json.searchTerm }}",
    "limit": 5
  },
  "options": {
    "headers": {
      "Content-Type": "application/json"
    }
  }
}
```

### Code (處理結果)
```javascript
const results = $input.first().json.results;

const videoUrl = "https://wp.momentry.ddns.net/Old_Time_Movie_Show_-_Charade_1963.HD.mov";

return results.map(r => ({
  chunk_id: r.chunk_id,
  text: r.text,
  start: r.start_time,
  end: r.end_time,
  score: r.score,
  video_url: `${videoUrl}#t=${r.start_time},${r.end_time}`
}));
```

---

## Workflow 2: n8n 專用格式

使用 `/n8n/search` 端點（已包含 media_url）

### HTTP Request
```json
{
  "url": "http://localhost:3002/api/v1/n8n/search",
  "method": "POST",
  "body": {
    "query": "={{ $json.searchTerm }}",
    "limit": 5
  }
}
```

### 回傳格式
```json
{
  "query": "charade",
  "count": 5,
  "hits": [
    {
      "id": "sentence_0006",
      "vid": "a1b10138a6bbb0cd",
      "start": 48.8,
      "end": 55.44,
      "title": "Chunk sentence_0006",
      "text": "fun plot twists...",
      "score": 0.526,
      "media_url": "https://wp.momentry.ddns.net/Old_Time_Movie_Show_-_Charade_1963.HD.mov"
    }
  ]
}
```

---

## Workflow 3: 訊息機器人整合

### Telegram Bot 範例

```
[Webhook: Telegram]
     ↓
[Extract: /search charade]
     ↓
[HTTP Request] → POST /api/v1/search
     ↓
[Format Response]
     ↓
[Telegram: Send Message]
```

### 回傳格式
```
🎬 搜尋結果: "charade"

1. "fun plot twists, Woody Dialog and charming performances..."
   ⏱ 48.8s - 55.4s
   📊 分數: 0.526
   
2. "Don't you like me to say that a pretty girl..."
   ⏱ 4745.6s - 4748.6s
   📊 分數: 0.525
```

---

## Workflow 4: 多影片搜尋

### 取得所有影片
```
[HTTP Request]
GET http://localhost:3002/api/v1/videos
```

### 依 UUID 篩選
```json
{
  "query": "charade",
  "limit": 5,
  "uuid": "a1b10138a6bbb0cd"
}
```

---

## Workflow 5: 定時更新

```
[Cron: 每小時]
     ↓
[HTTP Request] → GET /api/v1/videos
     ↓
[Loop Over Items]
     ↓
[Check: 新影片?]
     ↓
[Process: 執行 vectorize]
```

---

## 實用場景

### 1. 客服機器人
用戶問「這部片在哪一段有談到 charade？」
→ 搜尋 API → 回傳時戳 → 直接播放該片段

### 2. 內容推薦
根據用戶輸入的關鍵字，找到相關影片片段

### 3. 自動化剪輯
搜尋多個片段 → 組合成精華影片

---

## 錯誤處理

```javascript
const response = $input.first();

if (!response.json.results || response.json.results.length === 0) {
  return {
    success: false,
    message: "找不到相關結果"
  };
}

return {
  success: true,
  count: response.json.results.length,
  data: response.json.results
};
```

---

## 測試用 cURL

```bash
# 基本搜尋
curl -X POST http://localhost:3002/api/v1/search \
  -H "Content-Type: application/json" \
  -d '{"query": "charade", "limit": 3}'

# n8n 格式
curl -X POST http://localhost:3002/api/v1/n8n/search \
  -H "Content-Type: application/json" \
  -d '{"query": "charade", "limit": 3}'

# 取得影片列表
curl http://localhost:3002/api/v1/videos

# 取得特定影片的區塊
curl http://localhost:3002/api/v1/videos/a1b10138a6bbb0cd/chunks
```