# Design Document: Infrared Camera Data Query Enhancement

## Overview

This design enhances the `FindDatas` method in `MeasuresTemperatureResultAppService` to query temperature measurement data from infrared cameras stored in the `OriginalInspectionStoreResult` MongoDB collection. The enhancement introduces intelligent camera identification, fuzzy equipment name matching with 85% similarity threshold, and structured parsing of temperature data from result strings.

The design maintains backward compatibility with existing thermal imaging device queries while adding support for infrared camera data sources.

## Architecture

### High-Level Flow

```
FindDatas Request
    ↓
[1] Apply Infrared Camera Filter (CamName contains "热成像" OR ends with 'B')
    ↓
[2] Query OriginalInspectionStoreResult with time/filters
    ↓
[3] For each result:
    ├─ Apply Equipment Fuzzy Matching (85% similarity)
    ├─ Parse Temperature Data from Result field
    └─ Create MeasureTemperatureResultOutput records
    ↓
[4] Apply Name Filter (if specified)
    ↓
[5] Sort, Paginate, Return Results
```

### Integration Points

- **Existing Method**: `FindMeasureTempertureResults` - Currently handles thermal imaging devices (DevType 12, 22)
- **New Data Source**: `OriginalInspectionStoreResult` collection - Contains infrared camera inspection data
- **Shared Output**: `MeasureTemperatureResultOutput` - Common DTO for all temperature results

## Components and Interfaces

### Modified Method Signature

```csharp
[HttpPost, Description("查询温度测量结果")]
[Abp.Domain.Uow.UnitOfWork(true)]
[AbpAllowAnonymous]
[ShowApi]
public RequestPageResult<MeasureTemperatureResultOutput> FindDatas(
    PageSearchCondition<MeasureTemperatureResultSearchConditonInput> searchCondition)
```

### New Helper Methods

#### 1. IsInfraredCamera

```csharp
/// <summary>
/// Determines if a camera name indicates an infrared camera
/// </summary>
/// <param name="camName">Camera name from OriginalInspectionStoreResult</param>
/// <returns>True if camera is infrared type</returns>
private bool IsInfraredCamera(string camName)
```

**Logic:**
- Returns `true` if `camName` contains "热成像"
- Returns `true` if `camName` ends with 'B'
- Returns `false` otherwise
- Handles null/empty strings safely

#### 2. CalculateSimilarity (Enhanced)

```csharp
/// <summary>
/// Calculates string similarity using Levenshtein distance algorithm
/// </summary>
/// <param name="source">Source string</param>
/// <param name="target">Target string</param>
/// <returns>Similarity score between 0.0 and 1.0</returns>
private double CalculateSimilarity(string source, string target)
```

**Current Implementation Issue:**
The existing implementation uses simple character matching which is not accurate for 85% similarity requirements.

**Enhanced Logic:**
- Use Levenshtein distance algorithm for accurate similarity calculation
- Formula: `similarity = 1.0 - (levenshteinDistance / maxLength)`
- Handle null/empty strings by returning 0.0
- Case-insensitive comparison

#### 3. ParseTemperatureFromInfraredResult

```csharp
/// <summary>
/// Parses temperature data from infrared camera result string
/// </summary>
/// <param name="data">Original inspection store result</param>
/// <param name="equipmentInfo">Associated equipment (may be null)</param>
/// <returns>List of temperature measurement outputs</returns>
private List<MeasureTemperatureResultOutput> ParseTemperatureFromInfraredResult(
    OriginalInspectionStoreResult data,
    EquipmentInfo equipmentInfo)
```

**Logic:**
- Split `Result` field by delimiters: `,`, `，`, `\r\n`, `\n`
- For each segment:
  - Check if contains `:` or `：`
  - If yes: split into name and value parts
  - Extract numeric temperature using regex: `@"-?\d+(?:\.\d+)?"`
  - Create `MeasureTemperatureResultOutput` with parsed data
- Handle missing/invalid data gracefully
- Log parsing failures with original Result string

#### 4. MatchesEquipmentByName

```csharp
/// <summary>
/// Checks if inspection data matches equipment using fuzzy name matching
/// </summary>
/// <param name="data">Original inspection store result</param>
/// <param name="equipment">Equipment to match against</param>
/// <param name="threshold">Similarity threshold (default 0.85)</param>
/// <returns>True if names match with sufficient similarity</returns>
private bool MatchesEquipmentByName(
    OriginalInspectionStoreResult data,
    EquipmentInfo equipment,
    double threshold = 0.85)
```

**Logic:**
- Check `data.EquipmentInfoName` against `equipment.Name`
- Check `data.Name` against `equipment.Name`
- Return `true` if either similarity >= threshold
- Return `false` if both similarities < threshold

## Data Models

### Input: MeasureTemperatureResultSearchConditonInput

```csharp
public class MeasureTemperatureResultSearchConditonInput
{
    public Guid? EquipmentInfoId { get; set; }
    public string Name { get; set; }
    public DateTime? StartTime { get; set; }
    public DateTime? EndTime { get; set; }
    // ... other existing properties
}
```

### Source: OriginalInspectionStoreResult

```csharp
public class OriginalInspectionStoreResult
{
    public string CamName { get; set; }              // Camera identifier
    public string PresetCode { get; set; }           // Preset position code
    public string Result { get; set; }               // Temperature data string
    public DateTime Time { get; set; }               // Measurement time
    public string CaptureTime { get; set; }          // Capture timestamp
    public string Status { get; set; }               // Status code
    public string Message { get; set; }              // Result message
    public string Name { get; set; }                 // Item name
    public string EquipmentInfoName { get; set; }    // Equipment name
    public Guid? EquipmentInfoId { get; set; }       // Equipment ID
    // ... other properties
}
```

### Output: MeasureTemperatureResultOutput

```csharp
public class MeasureTemperatureResultOutput
{
    public Guid Id { get; set; }
    public Guid MeasureTemperaturePointId { get; set; }
    public int Number { get; set; }
    public string Name { get; set; }
    public float? TemperatureValue { get; set; }
    public string Message { get; set; }
    public DateTime? MeasureTime { get; set; }
    public int Status { get; set; }
    public Guid? EquipmentInfoId { get; set; }
    public string EquipmentInfoName { get; set; }
    // ... other properties
}
```

## Correctness Properties

*A property is a characteristic or behavior that should hold true across all valid executions of a system—essentially, a formal statement about what the system should do. Properties serve as the bridge between human-readable specifications and machine-verifiable correctness guarantees.*

### Property 1: Infrared Camera Identification Completeness

*For any* OriginalInspectionStoreResult record where CamName contains "热成像" or ends with 'B', the IsInfraredCamera method should return true.

**Validates: Requirements 1.1, 1.2, 1.3**

### Property 2: Similarity Calculation Symmetry

*For any* two non-empty strings A and B, CalculateSimilarity(A, B) should equal CalculateSimilarity(B, A).

**Validates: Requirements 2.4**

### Property 3: Similarity Score Bounds

*For any* two strings A and B, CalculateSimilarity(A, B) should return a value between 0.0 and 1.0 inclusive.

**Validates: Requirements 2.4**

### Property 4: Equipment Matching Threshold

*For any* OriginalInspectionStoreResult and Equipment pair, if either EquipmentInfoName or Name has similarity >= 0.85 with Equipment.Name, then MatchesEquipmentByName should return true.

**Validates: Requirements 2.5, 2.6**

### Property 5: Valid Temperature Data Parsing

*For any* Result string containing segments in format "name:value" where value is numeric, ParseTemperatureFromInfraredResult should extract at least one MeasureTemperatureResultOutput with non-null TemperatureValue.

**Validates: Requirements 3.1, 3.2, 3.3, 3.5, 3.6**

### Property 6: Invalid Segment Skipping

*For any* Result string containing segments without colons, ParseTemperatureFromInfraredResult should skip those segments and continue processing remaining segments.

**Validates: Requirements 3.4, 3.7**

### Property 7: Filter Application Order

*For any* query with time range, equipment filter, and name filter, the System should apply filters in order: infrared camera → time range → equipment matching → temperature parsing → name filtering.

**Validates: Requirements 4.1, 4.2, 4.3, 4.4, 4.5**

### Property 8: Null Safety in Similarity Calculation

*For any* call to CalculateSimilarity where either parameter is null or empty, the method should return 0.0 without throwing exceptions.

**Validates: Requirements 5.2**

### Property 9: Parsing Error Isolation

*For any* OriginalInspectionStoreResult with invalid Result format, parsing failures should not prevent processing of other records in the result set.

**Validates: Requirements 5.1, 5.5**

## Error Handling

### Exception Scenarios

1. **MongoDB Query Failures**
   - Catch: `MongoException`, `TimeoutException`
   - Action: Log error with query details, return error response
   - User Message: "数据库查询失败，请稍后重试"

2. **Temperature Parsing Failures**
   - Catch: `FormatException`, `RegexMatchTimeoutException`
   - Action: Log warning with Result string, skip record, continue
   - No user-facing error (graceful degradation)

3. **Similarity Calculation Errors**
   - Catch: `ArgumentException`, `NullReferenceException`
   - Action: Return 0.0 similarity, log warning
   - Continue processing

4. **Equipment Lookup Failures**
   - Catch: `InvalidOperationException`
   - Action: Log warning, skip equipment matching for that record
   - Continue with other records

### Logging Strategy

```csharp
// Error level - Critical failures
Log4Helper.Error(this.GetType(), "查询红外测温数据失败", ex);

// Warning level - Recoverable issues
Log4Helper.Warn(this.GetType(), $"解析温度数据失败: {data.Result}", ex);

// Info level - Normal operations
Log4Helper.Info(this.GetType(), $"查询到 {count} 条红外测温数据");
```

## Testing Strategy

### Unit Tests

Unit tests will verify specific examples and edge cases:

1. **IsInfraredCamera Tests**
   - Test camera name containing "热成像"
   - Test camera name ending with 'B'
   - Test camera name with both conditions
   - Test camera name with neither condition
   - Test null/empty camera names

2. **CalculateSimilarity Tests**
   - Test identical strings (should return 1.0)
   - Test completely different strings (should return close to 0.0)
   - Test strings with 85% similarity
   - Test null and empty string handling
   - Test case sensitivity

3. **ParseTemperatureFromInfraredResult Tests**
   - Test valid format: "2BL_C相连接点：-12.5℃"
   - Test multiple temperature points separated by commas
   - Test mixed valid and invalid segments
   - Test empty Result string
   - Test Result with no colons
   - Test negative temperatures
   - Test decimal temperatures

4. **MatchesEquipmentByName Tests**
   - Test exact name match
   - Test 85% similarity match
   - Test 84% similarity (should not match)
   - Test null equipment names
   - Test matching via EquipmentInfoName
   - Test matching via Name field

### Property-Based Tests

Property-based tests will verify universal properties across randomized inputs. Each test will run a minimum of 100 iterations.

1. **Property Test: Similarity Symmetry**
   - **Property 2: Similarity Calculation Symmetry**
   - **Validates: Requirements 2.4**
   - Generate random string pairs
   - Verify CalculateSimilarity(A, B) == CalculateSimilarity(B, A)

2. **Property Test: Similarity Bounds**
   - **Property 3: Similarity Score Bounds**
   - **Validates: Requirements 2.4**
   - Generate random string pairs
   - Verify 0.0 <= CalculateSimilarity(A, B) <= 1.0

3. **Property Test: Infrared Camera Identification**
   - **Property 1: Infrared Camera Identification Completeness**
   - **Validates: Requirements 1.1, 1.2, 1.3**
   - Generate camera names with "热成像" or ending with 'B'
   - Verify IsInfraredCamera returns true for all

4. **Property Test: Temperature Parsing Completeness**
   - **Property 5: Valid Temperature Data Parsing**
   - **Validates: Requirements 3.1, 3.2, 3.3, 3.5, 3.6**
   - Generate Result strings with valid "name:value" format
   - Verify at least one temperature point is extracted

5. **Property Test: Invalid Segment Handling**
   - **Property 6: Invalid Segment Skipping**
   - **Validates: Requirements 3.4, 3.7**
   - Generate Result strings with mix of valid and invalid segments
   - Verify invalid segments are skipped without errors

### Integration Tests

Integration tests will verify end-to-end functionality:

1. **Full Query Flow Test**
   - Insert test data into OriginalInspectionStoreResult
   - Call FindDatas with various filters
   - Verify correct results returned
   - Verify pagination works correctly

2. **Equipment Matching Integration Test**
   - Create equipment with specific name
   - Insert inspection data with similar names
   - Verify fuzzy matching works at 85% threshold

3. **Multi-Source Query Test**
   - Verify thermal imaging and infrared camera data can coexist
   - Verify both data sources are queried correctly

### Test Framework

- **Unit Testing**: xUnit or NUnit
- **Property-Based Testing**: FsCheck (for C#)
- **Mocking**: Moq for repository mocking
- **Test Data**: Builder pattern for creating test entities

### Test Configuration

```csharp
[Property(MaxTest = 100)]
public Property SimilarityIsSymmetric()
{
    return Prop.ForAll<string, string>((a, b) =>
    {
        var sim1 = CalculateSimilarity(a, b);
        var sim2 = CalculateSimilarity(b, a);
        return Math.Abs(sim1 - sim2) < 0.0001;
    });
}
```

## Implementation Notes

### Performance Considerations

1. **Levenshtein Distance Optimization**
   - Use iterative algorithm with O(n*m) complexity
   - Consider caching for repeated comparisons
   - Early exit if strings differ significantly in length

2. **MongoDB Query Optimization**
   - Add index on `CamName` field for faster filtering
   - Add index on `Time` field for time range queries
   - Use projection to retrieve only needed fields

3. **Batch Processing**
   - Process temperature parsing in parallel if result set is large
   - Consider streaming results for very large datasets

### Backward Compatibility

- Existing `FindMeasureTempertureResults` logic remains unchanged
- New infrared camera logic is additive
- Both thermal imaging and infrared data sources work independently
- Shared output DTO ensures consistent API response

### Configuration

Consider adding configuration for:
- Similarity threshold (default 0.85, configurable)
- Infrared camera name patterns (extensible list)
- Temperature parsing regex patterns
- Logging verbosity levels