# Practice Creation API Guide (Lesson Scope)

This guide provides the full step-by-step API process to create a lesson practice when using:

- system-defined question types (`MCQ`, `TRUE_FALSE`, `SHORT_ANSWER`, `AUDIO`)
- dynamic question types (`DYNAMIC` with `question_type_definition_id` + `dynamic_payload`)

All endpoints below are relative to `/api/v1` and require bearer authentication.

---

## Standard Response Envelope

Most successful responses follow:

```json
{
  "message": "Human-readable message",
  "data": {},
  "success": true,
  "status_code": 200,
  "metadata": null
}
```

Most errors follow:

```json
{
  "message": "Error summary",
  "error": "Detailed reason"
}
```

---

## Required Permissions

At minimum, your role should have:

- `questions.create`
- `question_sets.create`
- `question_set_items.add`
- `practices.create`

If you create/update dynamic definitions:

- `questions.update`
- `questions.delete` (if you also delete definitions)

---

## End-to-End Flow

1. (Optional) Upload media assets
2. Create question(s):
   - system-defined path, or
   - dynamic path (definition + question)
3. Create `PRACTICE` question set
4. Add question(s) to the set
5. Create lesson practice linked to that set
6. Verify under lesson

---

## Step 0 (Optional): Upload Media

Use this when question content references audio/image URLs.

### Endpoint

`POST /files/upload` (multipart form-data)

### Form fields

- `file`: binary
- `media_type`: `image` or `audio` or `video`

### Example success response (shape)

```json
{
  "message": "Media uploaded successfully",
  "data": {
    "url": "https://your-host/static/uploads/audio/abc.mp3",
    "object_key": "audio/abc.mp3"
  },
  "success": true,
  "status_code": 201
}
```

### Common errors

- `400` invalid media type/content type
- `500` upload/storage failure

Capture and reuse:

- `data.url` (or equivalent resolved file URL)

---

## Step 1A: Create System-Defined Question(s)

### Endpoint

`POST /questions`

### Request example (MCQ)

```json
{
  "question_text": "Choose the correct sentence.",
  "question_type": "MCQ",
  "difficulty_level": "EASY",
  "points": 1,
  "status": "PUBLISHED",
  "options": [
    { "option_text": "He go to school.", "is_correct": false },
    { "option_text": "He goes to school.", "is_correct": true }
  ]
}
```

### Request example (SHORT_ANSWER)

```json
{
  "question_text": "Write one sentence using the word 'improve'.",
  "question_type": "SHORT_ANSWER",
  "difficulty_level": "MEDIUM",
  "points": 2,
  "status": "PUBLISHED",
  "short_answers": [
    { "acceptable_answer": "I want to improve my English.", "match_type": "CASE_INSENSITIVE" }
  ]
}
```

### Example success response (shape)

```json
{
  "message": "Question created successfully",
  "data": {
    "id": 456,
    "question_text": "Choose the correct sentence.",
    "question_type": "MCQ",
    "status": "PUBLISHED"
  },
  "success": true,
  "status_code": 201
}
```

### Common errors

- `400` validation/body errors
- `500` create failure

Capture:

- `data.id` as `question_id`

---

## Step 1B: Dynamic Question Path

If you use dynamic questions, follow these sub-steps.

### 1B.1 Validate component-kind selection (optional but recommended)

#### Endpoint

`POST /questions/validate-question-type-definition`

#### Request

```json
{
  "stimulus_component_kinds": ["QUESTION_TEXT", "AUDIO_PROMPT", "IMAGE"],
  "response_component_kinds": ["AUDIO_RESPONSE", "TEXT_INPUT"]
}
```

#### Success response

```json
{
  "message": "Question type definition is valid",
  "data": { "valid": true }
}
```

#### Error response example

```json
{
  "message": "Invalid question type definition",
  "error": "response: unknown component kind \"AUDIO_PROMPT\""
}
```

---

### 1B.2 Create or reuse a dynamic type definition

#### Endpoint

`POST /questions/type-definitions`

#### Request

```json
{
  "key": "dialogue_audio_avatar_v1",
  "display_name": "Dialogue Audio + Avatar",
  "description": "Question text + prompt audio + two avatar images, with audio/text answer",
  "stimulus_component_kinds": ["QUESTION_TEXT", "AUDIO_PROMPT", "IMAGE"],
  "response_component_kinds": ["AUDIO_RESPONSE", "TEXT_INPUT"],
  "stimulus_schema": [
    { "id": "question_text", "kind": "QUESTION_TEXT", "required": true },
    { "id": "prompt_audio", "kind": "AUDIO_PROMPT", "required": true },
    { "id": "speaker_a_avatar", "kind": "IMAGE", "required": true },
    { "id": "speaker_b_avatar", "kind": "IMAGE", "required": true }
  ],
  "response_schema": [
    { "id": "answer_audio", "kind": "AUDIO_RESPONSE", "required": true },
    { "id": "answer_text", "kind": "TEXT_INPUT", "required": true }
  ],
  "status": "ACTIVE"
}
```

#### Success response example

```json
{
  "message": "Question type definition created",
  "data": {
    "id": 123,
    "key": "dialogue_audio_avatar_v1",
    "status": "ACTIVE"
  }
}
```

#### Common errors

- `400` invalid schema/kinds/mapping
- `500` unexpected persistence errors

Capture:

- `data.id` as `question_type_definition_id`

---

### 1B.3 Create dynamic question

#### Endpoint

`POST /questions`

#### Request

```json
{
  "question_text": "Listen and respond as Speaker B.",
  "question_type": "DYNAMIC",
  "question_type_definition_id": 123,
  "difficulty_level": "MEDIUM",
  "points": 2,
  "status": "PUBLISHED",
  "dynamic_payload": {
    "stimulus": [
      { "id": "question_text", "kind": "QUESTION_TEXT", "value": "Respond to the conversation." },
      { "id": "prompt_audio", "kind": "AUDIO_PROMPT", "value": "https://cdn.example.com/audio/prompt-1.mp3" },
      { "id": "speaker_a_avatar", "kind": "IMAGE", "value": "https://cdn.example.com/images/a.webp" },
      { "id": "speaker_b_avatar", "kind": "IMAGE", "value": "https://cdn.example.com/images/b.webp" }
    ],
    "response": [
      { "id": "answer_audio", "kind": "AUDIO_RESPONSE", "value": { "instructions": "Record your answer" } },
      { "id": "answer_text", "kind": "TEXT_INPUT", "value": { "placeholder": "Type your answer" } }
    ]
  }
}
```

#### Success response example

```json
{
  "message": "Question created successfully",
  "data": {
    "id": 789,
    "question_type": "DYNAMIC",
    "question_type_definition_id": 123,
    "status": "PUBLISHED"
  },
  "success": true,
  "status_code": 201
}
```

#### Common errors

- `400` missing/invalid `dynamic_payload`
- `400` missing `question_type_definition_id`
- `500` persistence failure

Capture:

- `data.id` as `question_id`

---

## Step 2: Create PRACTICE Question Set

### Endpoint

`POST /question-sets`

### Request

```json
{
  "title": "Lesson 12 - Practice Set",
  "description": "Question set for lesson-level practice",
  "set_type": "PRACTICE",
  "owner_type": "LESSON",
  "owner_id": 12,
  "status": "PUBLISHED",
  "shuffle_questions": false
}
```

### Success response example

```json
{
  "message": "Question set created successfully",
  "data": {
    "id": 55,
    "title": "Lesson 12 - Practice Set",
    "set_type": "PRACTICE",
    "owner_type": "LESSON",
    "owner_id": 12,
    "status": "PUBLISHED"
  },
  "success": true,
  "status_code": 201
}
```

### Common errors

- `400` invalid input
- `500` create failure

Capture:

- `data.id` as `set_id`

---

## Step 3: Add Question(s) to Set

Run this once per `question_id`.

### Endpoint

`POST /question-sets/:setId/questions`

### Request

```json
{
  "question_id": 456,
  "display_order": 1
}
```

### Success response example

```json
{
  "message": "Question added to set successfully",
  "data": {
    "id": 901,
    "set_id": 55,
    "question_id": 456,
    "display_order": 1
  },
  "success": true,
  "status_code": 201
}
```

### Common errors

- `400` invalid `setId` or body
- `500` link/create failure

---

## Step 4: Create Lesson Practice

This creates the practice record scoped to lesson.

### Endpoint

`POST /practices`

### Request

Include `publish_status`: `DRAFT` to hide the practice from subscribed learners until you set it to `PUBLISHED` (via create or `PUT /practices/:id`). Omit the field or send `PUBLISHED` to go live immediately (backward compatible).

```json
{
  "parent_kind": "LESSON",
  "parent_id": 12,
  "title": "Lesson 12 Conversation Drill",
  "story_description": "A short two-speaker scenario.",
  "story_image": "https://cdn.example.com/images/story.webp",
  "question_set_id": 55,
  "quick_tips": "Listen carefully before answering.",
  "publish_status": "DRAFT"
}
```

### Success response example

```json
{
  "message": "Practice created successfully",
  "data": {
    "id": 37,
    "parent_kind": "LESSON",
    "parent_id": 12,
    "title": "Lesson 12 Conversation Drill",
    "question_set_id": 55
  },
  "success": true,
  "status_code": 201
}
```

### Common errors

- `400` validation failed / invalid parent kind
- `404` lesson not found
- `404` question set not found
- `500` create failure

Capture:

- `data.id` as `practice_id`

---

## Step 5: Verify Practice Under Lesson

### Endpoint

`GET /lessons/:id/practices`

Example:

`GET /lessons/12/practices`

### Success response example

```json
{
  "message": "Practices retrieved successfully",
  "data": {
    "practices": [
      {
        "id": 37,
        "parent_kind": "LESSON",
        "parent_id": 12,
        "title": "Lesson 12 Conversation Drill",
        "question_set_id": 55
      }
    ],
    "total_count": 1,
    "limit": 20,
    "offset": 0
  },
  "success": true,
  "status_code": 200
}
```

---

## Optional Learner Completion Step

### Endpoint

`POST /progress/practices/:id/complete`

Use `practice_id` as `:id` for current behavior.

### Success response example

```json
{
  "message": "Practice completed",
  "success": true,
  "status_code": 200
}
```

### Common errors

- `403` sequence gating violation
- `404` practice not found
- `500` completion/persistence failure

---

## Quick Checklist (IDs to Carry Forward)

- From question create: `question_id`
- From dynamic definition create (if used): `question_type_definition_id`
- From question set create: `set_id`
- From practice create: `practice_id`

---

## Notes and Pitfalls

- For dynamic questions, `question_type` must be `DYNAMIC`.
- For dynamic questions, both `question_type_definition_id` and `dynamic_payload` are required.
- `AUDIO_PROMPT` is stimulus-side; response-side audio uses `AUDIO_RESPONSE`.
- `question_set_id` in `POST /practices` must reference an existing set.
- For lesson practice always use:
  - `parent_kind = "LESSON"`
  - `parent_id = <lesson_id>`
- Publish questions and question set (`status = "PUBLISHED"`) if learners must complete immediately.