# 戒烟/抽烟记录小程序：时序图

以下时序图使用 Mermaid（在支持 Mermaid 的 Markdown 渲染器中可直接预览）。

## 1) 登录与鉴权（获取 Bearer Token）

```mermaid
sequenceDiagram
  autonumber
  participant MP as 小程序(前端)
  participant API as 后端API(Gin)
  participant WX as 微信 jscode2session
  participant DB as MySQL
  participant Redis as Redis(可选)

  MP->>WX: wx.login() 获取 code
  MP->>API: POST /api/v1/auth/login {mini_program_id, code, ...可选资料}
  API->>DB: 读取 mini_programs(app_id/app_secret)
  API->>WX: code 换取 openid/session_key
  API->>DB: upsert users(mini_program_id+open_id)
  alt 启用 Redis session cache
    API->>Redis: 写入 session_key -> user 缓存
  end
  API-->>MP: {session_key} 作为后续 Authorization: Bearer <session_key>
```

## 2) 首次进入：基础信息补全（Profile）

```mermaid
sequenceDiagram
  autonumber
  participant MP as 小程序(前端)
  participant API as 后端API
  participant DB as MySQL

  MP->>API: GET /api/v1/smoke/profile (Bearer)
  API->>DB: 查询 fa_smoke_user_profile(uid)
  API-->>MP: exists/is_completed/baseline_interval_minutes/作息等
  alt 需要补全
    MP->>API: POST /api/v1/smoke/profile {...基础烟量/动机/动力/作息...}
    API->>DB: upsert fa_smoke_user_profile(uid)
    API-->>MP: 返回最新 profile + baseline_interval_minutes
  end
```

## 3) 记录抽烟 / 记录“忍住”

```mermaid
sequenceDiagram
  autonumber
  participant MP as 小程序(前端)
  participant API as 后端API
  participant DB as MySQL

  alt 实际抽烟
    MP->>API: POST /api/v1/smoke/logs {smoke_at?, remark?, level?, num?} (Bearer)
    API->>DB: INSERT fa_smoke_log(uid, smoke_time, smoke_at, remark, level, num)
    API-->>MP: 返回记录
  else 想抽但忍住
    MP->>API: POST /api/v1/smoke/logs/resisted {smoke_at?, remark?} (Bearer)
    API->>DB: INSERT fa_smoke_log(uid, ..., level=0, num=0)
    API-->>MP: 返回记录(用于列表展示)
  end
```

## 4) 首页：获取“下次抽烟记录时间”（默认 + AI 自动切换）

说明：统一使用 `GET /api/v1/smoke/next_smoke_time`。

```mermaid
sequenceDiagram
  autonumber
  participant MP as 小程序(前端)
  participant API as 后端API
  participant DB as MySQL

  MP->>API: GET /api/v1/smoke/next_smoke_time?date=today&mode=auto (Bearer)
  API->>DB: 查 fa_smoke_ai_advice(type=next_smoke_time, advice_date=today) 是否存在
  alt 已存在 AI 建议且 time_nodes 非空
    API->>DB: 查 fa_smoke_ai_next_smoke(ai_advice_id) 取 not_before/suggested/nodes
    API-->>MP: source=ai + 时间节点 + advice + default(兜底信息)
  else 不存在 AI 建议
    API->>DB: 查 fa_smoke_user_profile(uid) 取 baseline_interval/作息
    API->>DB: 查 fa_smoke_log 取最后一次实际抽烟 + 最近7天忍住次数
    API-->>MP: source=default + default.next_smoke_at
  end
```

## 5) 生成 AI “下次抽烟时间节点”（需要每日广告解锁）

说明：前端先“看广告解锁”，再用 `mode=ai` 生成当天/明天的 AI 时间节点；生成结果缓存“一天一份”。

```mermaid
sequenceDiagram
  autonumber
  participant MP as 小程序(前端)
  participant API as 后端API
  participant DB as MySQL
  participant AI as AI Provider(OpenAI-compatible)

  MP->>API: POST /api/v1/smoke/ai/advice_unlocks {date: "YYYY-MM-DD"} (Bearer)
  API->>DB: upsert fa_smoke_ai_advice_unlocks(uid, unlock_date=date)
  API-->>MP: unlocked=true

  MP->>API: GET /api/v1/smoke/next_smoke_time?date=YYYY-MM-DD&mode=ai (Bearer)
  API->>DB: 校验是否解锁(或会员)
  alt 未解锁
    API-->>MP: 403 需要观看广告解锁
  else 已解锁
    API->>DB: 读取最近3天 fa_smoke_log(含忍住) + profile + 默认策略
    API->>AI: /chat/completions(严格JSON输出)
    API->>DB: 写 fa_smoke_ai_advice(type=next_smoke_time, advice_date=date, ...)
    API->>DB: 写 fa_smoke_ai_next_smoke(每个时间点一条：not_before/suggested/node)
    API-->>MP: source=ai + 时间节点
  end
```

## 6) 每日 AI 戒烟建议（会员/广告解锁）

```mermaid
sequenceDiagram
  autonumber
  participant MP as 小程序(前端)
  participant API as 后端API
  participant DB as MySQL
  participant AI as AI Provider(OpenAI-compatible)

  MP->>API: GET /api/v1/smoke/ai/advice?date=YYYY-MM-DD (Bearer)
  API->>DB: 查 fa_smoke_ai_advice(type=daily_advice, advice_date=date) 是否已缓存
  alt 已缓存
    API-->>MP: advice
  else 未缓存
    API->>DB: 校验会员或广告解锁(unlock_date=date)
    alt 未解锁/非会员
      API-->>MP: 403 need vip_or_ad
    else 已解锁/会员
      API->>DB: 读取当天 fa_smoke_log(节点/总量)
      API->>AI: /chat/completions 生成建议
      API->>DB: 写 fa_smoke_ai_advice(type=daily_advice,...)
      API-->>MP: advice
    end
  end
```