# AssetManager Backend (个人资产策略管理系统)

基于 **.NET 8** + **MySQL** + **SqlSugar** 构建的高性能资产管理系统后端。采用 **Database First (数据库优先)** 模式开发，专注于量化策略管理与资产分析。

## 🛠 技术栈 (Tech Stack)

| 模块 | 技术选型 | 说明 |
| :--- | :--- | :--- |
| **核心框架** | .NET 8 Web API | 最新长期支持版，高性能 |
| **数据库** | MySQL 8.0+ | 稳定、开源的关系型数据库 |
| **ORM** | **SqlSugar** |哪怕是 .NET 老手也爱用的国产轻量级 ORM |
| **架构模式** | Repository Pattern | 仓储模式，解耦业务与数据访问 |
| **接口文档** | Swagger / Knife4j | 在线接口调试 |

## 📂 项目结构 (Project Structure)

```text
AssetManager
├── src
│   ├── AssetManager.API            # [入口层] Controllers, DTOs, 全局Filter, IOC配置
│   ├── AssetManager.Services       # [业务层] 核心逻辑 (计算盈亏, 策略信号, 校验)
│   ├── AssetManager.Repository     # [数据层] SqlSugar 仓储实现, UnitOfWork
│   ├── AssetManager.Models         # [实体层] POCO实体 (由数据库自动生成)
│   └── AssetManager.Infrastructure # [基础层] 常用工具类, 外部API调用
└── AssetManager.sln
```

## 📊 策略引擎 (Strategy Engine)

### 功能介绍

策略引擎是系统的核心组件，负责根据配置的策略参数计算交易信号。支持以下三种策略类型：

1. **双均线策略 (ma_trend)** - 经典的趋势跟踪策略，通过短期均线和长期均线的交叉产生买卖信号
2. **吊灯止损策略 (chandelier_exit)** - 趋势跟踪止损策略，通过计算最高价/最低价和 ATR（平均真实波幅）来设置止损止盈位
3. **风险平价策略 (risk_parity)** - 资产配置策略，通过调整各资产权重使每个资产对组合的风险贡献相等

### 策略配置示例

#### 1. 双均线策略 (ma_trend)

```json
{
  "maType": "SMA",           // 均线类型：SMA(简单移动平均) / EMA(指数移动平均)
  "shortPeriod": 20,         // 短期均线周期
  "longPeriod": 60           // 长期均线周期
}
```

#### 2. 吊灯止损策略 (chandelier_exit)

```json
{
  "period": 22,              // 周期（通常为 22）
  "multiplier": 3.0,         // ATR 倍数（通常为 3.0）
  "useClose": false           // 是否使用收盘价计算（false 表示用最高价/最低价）
}
```

#### 3. 风险平价策略 (risk_parity)

```json
{
  "lookbackPeriod": 60,       // 历史数据回看周期
  "rebalanceThreshold": 0.05,  // 再平衡阈值（偏离度超过 5% 触发再平衡）
  "assets": [                  // 目标资产列表（可选，不指定则使用当前持仓）
    { "symbol": "AAPL", "targetWeight": 0.6 },
    { "symbol": "BTC/USD", "targetWeight": 0.4 }
  ]
}
```

## 📡 API 示例

## 🎯 策略 API (Strategy API)

### 1. 获取策略列表

**请求 URL**: `GET /api/v1/strategy/strategies`

**请求头**:
```
Authorization: Bearer {token}
```

**响应示例**:

```json
{
  "code": 200,
  "data": [
    {
      "Id": "12345678-1234-1234-1234-1234567890ab",
      "Title": "双均线策略",
      "Type": "ma_trend",
      "Description": "经典趋势跟踪策略",
      "RiskLevel": "medium",
      "Tags": ["趋势", "均线"],
      "Parameters": {
        "maType": "SMA",
        "shortPeriod": 20,
        "longPeriod": 60
      },
      "UserId": "user-123",
      "CreatedAt": "2024-01-01T10:00:00",
      "UpdatedAt": "2024-01-01T10:00:00"
    },
    {
      "Id": "87654321-4321-4321-4321-210987654321",
      "Title": "风险平价策略",
      "Type": "risk_parity",
      "Description": "资产配置策略",
      "RiskLevel": "low",
      "Tags": ["资产配置", "风险控制"],
      "Parameters": {
        "lookbackPeriod": 60,
        "rebalanceThreshold": 0.05,
        "assets": [
          { "symbol": "AAPL", "targetWeight": 0.6 },
          { "symbol": "BTC/USD", "targetWeight": 0.4 }
        ]
      },
      "UserId": "user-123",
      "CreatedAt": "2024-01-02T10:00:00",
      "UpdatedAt": "2024-01-02T10:00:00"
    }
  ],
  "message": "Success"
}
```

### 2. 获取单个策略详情

**请求 URL**: `GET /api/v1/strategy/{id}`

**请求头**:
```
Authorization: Bearer {token}
```

**响应示例**:

```json
{
  "code": 200,
  "data": {
    "Id": "12345678-1234-1234-1234-1234567890ab",
    "Title": "双均线策略",
    "Type": "ma_trend",
    "Description": "经典趋势跟踪策略",
    "RiskLevel": "medium",
    "Tags": ["趋势", "均线"],
    "Parameters": {
      "maType": "SMA",
      "shortPeriod": 20,
      "longPeriod": 60
    },
    "UserId": "user-123",
    "CreatedAt": "2024-01-01T10:00:00",
    "UpdatedAt": "2024-01-01T10:00:00"
  },
  "message": "Success"
}
```

### 3. 创建策略

**请求 URL**: `POST /api/v1/strategy`

**请求头**:
```
Authorization: Bearer {token}
Content-Type: application/json
```

**请求体示例**:

#### 3.1 创建双均线策略

```json
{
  "name": "双均线策略",
  "type": "ma_trend",
  "description": "经典趋势跟踪策略",
  "riskLevel": "medium",
  "tags": ["趋势", "均线"],
  "parameters": {
    "maType": "SMA",
    "shortPeriod": 20,
    "longPeriod": 60
  }
}
```

#### 3.2 创建风险平价策略

```json
{
  "name": "风险平价策略",
  "type": "risk_parity",
  "description": "资产配置策略",
  "riskLevel": "low",
  "tags": ["资产配置", "风险控制"],
  "parameters": {
    "lookbackPeriod": 60,
    "rebalanceThreshold": 0.05,
    "assets": [
      { "symbol": "AAPL", "targetWeight": 0.6 },
      { "symbol": "BTC/USD", "targetWeight": 0.4 }
    ]
  }
}
```

#### 3.3 创建吊灯止损策略

```json
{
  "name": "吊灯止损策略",
  "type": "chandelier_exit",
  "description": "趋势跟踪止损策略",
  "riskLevel": "high",
  "tags": ["止损", "趋势"],
  "parameters": {
    "period": 22,
    "multiplier": 3.0,
    "useClose": false
  }
}
```

**响应示例**:

```json
{
  "code": 200,
  "data": {
    "Id": "12345678-1234-1234-1234-1234567890ab",
    "Title": "双均线策略",
    "Type": "ma_trend",
    "Description": "经典趋势跟踪策略",
    "RiskLevel": "medium",
    "Tags": ["趋势", "均线"],
    "Parameters": {
      "maType": "SMA",
      "shortPeriod": 20,
      "longPeriod": 60
    },
    "UserId": "user-123",
    "CreatedAt": "2024-01-01T10:00:00",
    "UpdatedAt": "2024-01-01T10:00:00"
  },
  "message": "Strategy created successfully"
}
```

### 4. 更新策略

**请求 URL**: `PUT /api/v1/strategy/{id}`

**请求头**:
```
Authorization: Bearer {token}
Content-Type: application/json
```

**请求体示例**:

```json
{
  "name": "双均线策略（更新）",
  "type": "ma_trend",
  "description": "经典趋势跟踪策略",
  "riskLevel": "medium",
  "tags": ["趋势", "均线"],
  "parameters": {
    "maType": "EMA",
    "shortPeriod": 15,
    "longPeriod": 50
  }
}
```

**响应示例**:

```json
{
  "code": 200,
  "data": {
    "Id": "12345678-1234-1234-1234-1234567890ab",
    "Title": "双均线策略（更新）",
    "Type": "ma_trend",
    "Description": "经典趋势跟踪策略",
    "RiskLevel": "medium",
    "Tags": ["趋势", "均线"],
    "Parameters": {
      "maType": "EMA",
      "shortPeriod": 15,
      "longPeriod": 50
    },
    "UserId": "user-123",
    "CreatedAt": "2024-01-01T10:00:00",
    "UpdatedAt": "2024-01-15T14:30:00"
  },
  "message": "Strategy updated successfully"
}
```

### 5. 删除策略

**请求 URL**: `DELETE /api/v1/strategy/{id}`

**请求头**:
```
Authorization: Bearer {token}
```

**响应示例**:

```json
{
  "code": 200,
  "data": {
    "id": "12345678-1234-1234-1234-1234567890ab",
    "status": "deleted"
  },
  "message": "Strategy deleted successfully"
}
```

### 错误响应格式

所有策略接口在发生错误时都会返回统一的错误格式：

```json
{
  "code": 401,
  "data": null,
  "message": "用户未授权"
}
```

**常见错误码**:
- `401`: 用户未授权
- `404`: 策略不存在
- `500`: 服务器内部错误

## 💼 投资组合 API (Portfolio API)

### 1. 创建投资组合

**请求 URL**: `POST /api/v1/portfolio`

**请求头**:
```
Authorization: Bearer {token}
Content-Type: application/json
```

**请求体示例**:

```json
{
  "name": "我的投资组合",
  "strategyId": "strategy-123",
  "currency": "USD",
  "stocks": [
    {
      "name": "Apple Inc.",
      "code": "AAPL",
      "price": 150.50,
      "amount": 100,
      "date": "2024-01-01",
      "currency": "USD"
    },
    {
      "name": "Microsoft Corp.",
      "code": "MSFT",
      "price": 300.25,
      "amount": 50,
      "date": "2024-01-01",
      "currency": "USD"
    }
  ]
}
```

**响应示例**:

```json
{
  "code": 200,
  "data": {
    "id": "port-abc12345",
    "totalValue": 30075.00,
    "returnRate": 0.0,
    "currency": "USD",
    "createdAt": "2024-01-01 10:30:00"
  },
  "message": "success"
}
```

### 2. 获取投资组合列表

**请求 URL**: `GET /api/v1/portfolio`

**请求头**:
```
Authorization: Bearer {token}
```

**响应示例**:

```json
{
  "code": 200,
  "data": {
    "items": [
      {
        "id": "port-abc12345",
        "name": "我的投资组合",
        "tags": "科技股",
        "status": "运行中",
        "statusType": "active",
        "iconChar": "P",
        "iconBgClass": "bg-blue-500",
        "iconTextClass": "text-white",
        "value": 30075.00,
        "currency": "USD",
        "returnRate": 0.15,
        "returnType": "positive"
      },
      {
        "id": "port-def67890",
        "name": "保守组合",
        "tags": "债券",
        "status": "运行中",
        "statusType": "active",
        "iconChar": "C",
        "iconBgClass": "bg-green-500",
        "iconTextClass": "text-white",
        "value": 50000.00,
        "currency": "USD",
        "returnRate": 0.08,
        "returnType": "positive"
      }
    ]
  },
  "message": "success"
}
```

### 3. 获取总资产情况

**请求 URL**: `GET /api/v1/portfolio/assets`

**请求头**:
```
Authorization: Bearer {token}
```

**响应示例**:

```json
{
  "code": 200,
  "data": {
    "totalValue": 80075.00,
    "currency": "USD",
    "todayProfit": 1250.50,
    "todayProfitCurrency": "USD",
    "totalReturnRate": 0.12
  },
  "message": "success"
}
```

### 4. 获取单个投资组合详情

**请求 URL**: `GET /api/v1/portfolio/{id}`

**请求头**:
```
Authorization: Bearer {token}
```

**响应示例**:

```json
{
  "code": 200,
  "data": {
    "id": "port-abc12345",
    "name": "我的投资组合",
    "currency": "CNY",
    "status": "记录中",
    "strategy": {
      "id": "strategy-123",
      "name": "HFEA 风险平价逻辑",
      "description": "目标权重 季度调仓"
    },
    "portfolioValue": 156240.00,
    "totalReturn": 0.4282,
    "todayProfit": 1240.50,
    "historicalChange": 42.82,
    "dailyVolatility": 1240.50,
    "todayProfitCurrency": "CNY",
    "logicModel": "HFEA 风险平价逻辑",
    "logicModelStatus": "监控中",
    "logicModelDescription": "目标权重 季度调仓",
    "totalItems": 2,
    "totalRatio": 100.0,
    "positions": [
      {
        "id": "pos-xyz12345",
        "stockCode": "UPRO",
        "stockName": "UPRO",
        "symbol": "UPRO.US",
        "amount": 142,
        "averagePrice": 500.00,
        "currentPrice": 605.00,
        "totalValue": 85932.00,
        "profit": 12400.00,
        "profitRate": 0.248,
        "changeAmount": 12400.00,
        "ratio": 55.0,
        "deviationRatio": 16.8,
        "currency": "CNY"
      },
      {
        "id": "pos-xyz67890",
        "stockCode": "TMF",
        "stockName": "TMF",
        "symbol": "TMF.US",
        "amount": 800,
        "averagePrice": 90.00,
        "currentPrice": 87.89,
        "totalValue": 70308.00,
        "profit": -3200.50,
        "profitRate": -0.0445,
        "changeAmount": -3200.50,
        "ratio": 45.0,
        "deviationRatio": -4.3,
        "currency": "CNY"
      }
    ]
  },
  "message": "success"
}
```

### 5. 获取交易记录

**请求 URL**: `GET /api/v1/portfolio/transactions`

**请求头**:
```
Authorization: Bearer {token}
```

**查询参数**:
- `portfolioId` (必填): 投资组合ID
- `limit` (可选): 每页记录数，默认 10
- `offset` (可选): 偏移量，默认 0

**请求示例**:
```
GET /api/v1/portfolio/transactions?portfolioId=port-abc12345&limit=10&offset=0
```

**响应示例**:

```json
{
  "code": 200,
  "data": {
    "items": [
      {
        "id": "trans-abc12345",
        "portfolioId": "port-abc12345",
        "date": "2024-02-14",
        "time": "14:30",
        "type": "buy",
        "title": "定期定投 UPRO录入增加",
        "amount": 500.00,
        "currency": "USD",
        "status": "completed",
        "remark": "定期定投"
      },
      {
        "id": "trans-def67890",
        "portfolioId": "port-abc12345",
        "date": "2024-01-01",
        "time": "09:15",
        "type": "sell",
        "title": "季度再平衡 TMF结出减少 200股",
        "amount": 200.00,
        "currency": "USD",
        "status": "completed",
        "remark": "季度再平衡"
      },
      {
        "id": "trans-ghi78901",
        "portfolioId": "port-abc12345",
        "date": "2023-12-15",
        "time": "10:00",
        "type": "buy",
        "title": "建仓买入录入增加",
        "amount": 100000.00,
        "currency": "CNY",
        "status": "completed",
        "remark": "建仓买入"
      },
      {
        "id": "trans-jkl23456",
        "portfolioId": "port-abc12345",
        "date": "2023-12-10",
        "time": "11:20",
        "type": "buy",
        "title": "建仓买入录入增加",
        "amount": 50000.00,
        "currency": "CNY",
        "status": "completed",
        "remark": "建仓买入"
      }
    ],
    "total": 4,
    "page": 1,
    "pageSize": 10
  },
  "message": "success"
}
```

### 6. 创建交易

**请求 URL**: `POST /api/v1/portfolio/transactions`

**请求头**:
```
Authorization: Bearer {token}
Content-Type: application/json
```

**请求体示例**:

```json
{
  "portfolioId": "port-abc12345",
  "type": "buy",
  "stockCode": "AAPL",
  "amount": 50,
  "price": 155.00,
  "currency": "USD",
  "remark": "加仓"
}
```

**响应示例**:

```json
{
  "code": 200,
  "data": {
    "id": "trans-xyz12345",
    "totalAmount": 7750.00,
    "status": "processing",
    "createdAt": "2024-01-15 14:30:00"
  },
  "message": "success"
}
```

### 错误响应格式

所有接口在发生错误时都会返回统一的错误格式：

```json
{
  "code": 401,
  "data": null,
  "message": "用户未授权"
}
```

**常见错误码**:
- `401`: 用户未授权
- `500`: 服务器内部错误