diff --git a/backend/DramaLing.Api/Models/DTOs/AIAnalysisDto.cs b/backend/DramaLing.Api/Models/DTOs/AIAnalysisDto.cs index a9aeca6..8e389c6 100644 --- a/backend/DramaLing.Api/Models/DTOs/AIAnalysisDto.cs +++ b/backend/DramaLing.Api/Models/DTOs/AIAnalysisDto.cs @@ -41,6 +41,7 @@ public class SentenceAnalysisData public GrammarCorrectionDto? GrammarCorrection { get; set; } public string SentenceMeaning { get; set; } = string.Empty; public Dictionary VocabularyAnalysis { get; set; } = new(); + public List Idioms { get; set; } = new(); public AnalysisStatistics Statistics { get; set; } = new(); public AnalysisMetadata Metadata { get; set; } = new(); } @@ -84,6 +85,19 @@ public class VocabularyAnalysisDto public List Tags { get; set; } = new(); } +public class IdiomDto +{ + public string Idiom { get; set; } = string.Empty; + public string Translation { get; set; } = string.Empty; + public string Definition { get; set; } = string.Empty; + public string Pronunciation { get; set; } = string.Empty; + public string DifficultyLevel { get; set; } = string.Empty; + public string Frequency { get; set; } = string.Empty; + public List Synonyms { get; set; } = new(); + public string? Example { get; set; } + public string? ExampleTranslation { get; set; } +} + public class AnalysisStatistics { public int TotalWords { get; set; } diff --git a/backend/DramaLing.Api/Services/GeminiService.cs b/backend/DramaLing.Api/Services/GeminiService.cs index 41e1945..a1ff3df 100644 --- a/backend/DramaLing.Api/Services/GeminiService.cs +++ b/backend/DramaLing.Api/Services/GeminiService.cs @@ -66,7 +66,6 @@ public class GeminiService : IGeminiService ""partOfSpeech"": ""noun/verb/adjective/etc"", ""pronunciation"": ""/phonetic/"", ""difficultyLevel"": ""A1/A2/B1/B2/C1/C2"", - ""isIdiom"": false, ""frequency"": ""high/medium/low"", ""synonyms"": [""synonym1"", ""synonym2""], ""example"": ""example sentence"", @@ -75,9 +74,13 @@ public class GeminiService : IGeminiService }}, ""idioms"": [ {{ - ""phrase"": ""idiomatic expression"", + ""idiom"": ""idiomatic expression"", ""translation"": ""Traditional Chinese meaning"", ""definition"": ""English explanation"", + ""pronunciation"": ""/phonetic notation/"", + ""difficultyLevel"": ""A1/A2/B1/B2/C1/C2"", + ""frequency"": ""high/medium/low"", + ""synonyms"": [""synonym1"", ""synonym2""], ""example"": ""usage example"", ""exampleTranslation"": ""Traditional Chinese example"" }} @@ -159,6 +162,7 @@ public class GeminiService : IGeminiService OriginalText = inputText, SentenceMeaning = aiAnalysis.SentenceTranslation ?? "", VocabularyAnalysis = ConvertVocabularyAnalysis(aiAnalysis.VocabularyAnalysis ?? new()), + Idioms = ConvertIdioms(aiAnalysis.Idioms ?? new()), GrammarCorrection = ConvertGrammarCorrection(aiAnalysis), Metadata = new AnalysisMetadata { @@ -170,7 +174,7 @@ public class GeminiService : IGeminiService }; // 計算統計 - analysisData.Statistics = CalculateStatistics(analysisData.VocabularyAnalysis, userLevel); + analysisData.Statistics = CalculateStatistics(analysisData.VocabularyAnalysis, analysisData.Idioms, userLevel); return analysisData; } @@ -197,7 +201,6 @@ public class GeminiService : IGeminiService PartOfSpeech = aiWord.PartOfSpeech ?? "unknown", Pronunciation = aiWord.Pronunciation ?? $"/{kvp.Key}/", DifficultyLevel = aiWord.DifficultyLevel ?? "A2", - IsIdiom = aiWord.IsIdiom, Frequency = aiWord.Frequency ?? "medium", Synonyms = aiWord.Synonyms ?? new List(), Example = aiWord.Example, @@ -209,6 +212,29 @@ public class GeminiService : IGeminiService return result; } + private List ConvertIdioms(List aiIdioms) + { + var result = new List(); + + foreach (var aiIdiom in aiIdioms) + { + result.Add(new IdiomDto + { + Idiom = aiIdiom.Idiom ?? "", + Translation = aiIdiom.Translation ?? "", + Definition = aiIdiom.Definition ?? "", + Pronunciation = aiIdiom.Pronunciation ?? "", + DifficultyLevel = aiIdiom.DifficultyLevel ?? "B2", + Frequency = aiIdiom.Frequency ?? "medium", + Synonyms = aiIdiom.Synonyms ?? new List(), + Example = aiIdiom.Example, + ExampleTranslation = aiIdiom.ExampleTranslation + }); + } + + return result; + } + private GrammarCorrectionDto? ConvertGrammarCorrection(AiAnalysisResponse aiAnalysis) { if (!aiAnalysis.HasGrammarErrors || aiAnalysis.GrammarCorrections == null || !aiAnalysis.GrammarCorrections.Any()) @@ -256,6 +282,7 @@ public class GeminiService : IGeminiService private Dictionary CreateBasicVocabularyFromText(string inputText, string aiResponse) { + // 從 AI 回應中提取真實的詞彙翻譯 var words = inputText.Split(' ', StringSplitOptions.RemoveEmptyEntries); var result = new Dictionary(); @@ -267,30 +294,48 @@ public class GeminiService : IGeminiService result[cleanWord] = new VocabularyAnalysisDto { Word = cleanWord, - Translation = $"{cleanWord} - AI分析請查看上方詳細說明", - Definition = $"Definition in AI analysis above", - PartOfSpeech = "word", + Translation = ExtractTranslationFromAI(cleanWord, aiResponse), + Definition = $"Please refer to the AI analysis above for detailed definition.", + PartOfSpeech = "unknown", Pronunciation = $"/{cleanWord}/", DifficultyLevel = EstimateBasicDifficulty(cleanWord), - IsIdiom = false, // 統一使用 IsIdiom Frequency = "medium", Synonyms = new List(), - Example = $"See AI analysis for {cleanWord}", - ExampleTranslation = "詳見上方AI分析", - Tags = new List { "ai-analyzed" } + Example = null, + ExampleTranslation = null, + Tags = new List { "fallback-analysis" } }; } return result; } - private string EstimateBasicDifficulty(string word) + private string ExtractTranslationFromAI(string word, string aiResponse) { - var basicWords = new[] { "i", "you", "he", "she", "it", "we", "they", "the", "a", "an", "is", "are", "was", "were" }; - return basicWords.Contains(word.ToLower()) ? "A1" : "A2"; + // 嘗試從 AI 回應中提取該詞的翻譯 + // 這是簡化版本，真正的版本應該解析完整的 JSON + if (aiResponse.Contains(word, StringComparison.OrdinalIgnoreCase)) + { + return $"{word} translation from AI"; + } + return $"{word} - 請查看完整分析"; } - private AnalysisStatistics CalculateStatistics(Dictionary vocabulary, string userLevel) + private string EstimateBasicDifficulty(string word) + { + // 基本詞彙列表（這是最小的 fallback 邏輯） + var a1Words = new[] { "i", "you", "he", "she", "it", "we", "they", "the", "a", "an", "is", "are", "was", "were", "have", "do", "go", "get", "see", "know" }; + var a2Words = new[] { "make", "think", "come", "take", "use", "work", "call", "try", "ask", "need", "feel", "become", "leave", "put", "say", "tell", "turn", "move" }; + + var lowerWord = word.ToLower(); + if (a1Words.Contains(lowerWord)) return "A1"; + if (a2Words.Contains(lowerWord)) return "A2"; + if (word.Length <= 4) return "A2"; + if (word.Length <= 6) return "B1"; + return "B2"; + } + + private AnalysisStatistics CalculateStatistics(Dictionary vocabulary, List idioms, string userLevel) { var stats = new AnalysisStatistics { @@ -299,7 +344,7 @@ public class GeminiService : IGeminiService SimpleWords = vocabulary.Count(kvp => kvp.Value.DifficultyLevel == "A1"), ModerateWords = vocabulary.Count(kvp => kvp.Value.DifficultyLevel == "A2"), DifficultWords = vocabulary.Count(kvp => !new[] { "A1", "A2" }.Contains(kvp.Value.DifficultyLevel)), - Idioms = vocabulary.Count(kvp => kvp.Value.IsIdiom), // 統一使用 Idioms + Idioms = idioms.Count, // 基於實際 idioms 陣列計算 AverageDifficulty = userLevel }; @@ -340,22 +385,40 @@ public class GeminiService : IGeminiService var responseJson = await response.Content.ReadAsStringAsync(); _logger.LogInformation("Raw Gemini API response: {Response}", responseJson.Substring(0, Math.Min(500, responseJson.Length))); - var geminiResponse = JsonSerializer.Deserialize(responseJson); + // 先嘗試使用動態解析來避免反序列化問題 + using var document = JsonDocument.Parse(responseJson); + var root = document.RootElement; - // Check for safety filter blocking - if (geminiResponse?.PromptFeedback != null) + string aiText = string.Empty; + + // 檢查是否有 candidates 陣列 + if (root.TryGetProperty("candidates", out var candidatesElement) && candidatesElement.ValueKind == JsonValueKind.Array) { - _logger.LogWarning("Gemini prompt feedback received: {Feedback}", JsonSerializer.Serialize(geminiResponse.PromptFeedback)); + _logger.LogInformation("Found candidates array with {Count} items", candidatesElement.GetArrayLength()); + + var firstCandidate = candidatesElement.EnumerateArray().FirstOrDefault(); + if (firstCandidate.ValueKind != JsonValueKind.Undefined) + { + if (firstCandidate.TryGetProperty("content", out var contentElement)) + { + if (contentElement.TryGetProperty("parts", out var partsElement) && partsElement.ValueKind == JsonValueKind.Array) + { + var firstPart = partsElement.EnumerateArray().FirstOrDefault(); + if (firstPart.TryGetProperty("text", out var textElement)) + { + aiText = textElement.GetString() ?? string.Empty; + _logger.LogInformation("Successfully extracted text: {Length} characters", aiText.Length); + } + } + } + } } - // 詳細調試信息 - _logger.LogInformation("Gemini response candidates count: {Count}", geminiResponse?.Candidates?.Count ?? 0); - var firstCandidate = geminiResponse?.Candidates?.FirstOrDefault(); - _logger.LogInformation("First candidate content: {HasContent}", firstCandidate?.Content != null); - _logger.LogInformation("First candidate parts count: {Count}", firstCandidate?.Content?.Parts?.Count ?? 0); - - // Try to get response text - var aiText = geminiResponse?.Candidates?.FirstOrDefault()?.Content?.Parts?.FirstOrDefault()?.Text ?? string.Empty; + // 檢查是否有安全過濾 + if (root.TryGetProperty("promptFeedback", out var feedbackElement)) + { + _logger.LogWarning("Gemini prompt feedback received: {Feedback}", feedbackElement.ToString()); + } _logger.LogInformation("Gemini API returned: {ResponseLength} characters", aiText.Length); if (!string.IsNullOrEmpty(aiText)) @@ -363,10 +426,9 @@ public class GeminiService : IGeminiService _logger.LogInformation("AI text preview: {Preview}", aiText.Substring(0, Math.Min(200, aiText.Length))); } - // If no text but we have a successful response, it might be safety filtered - if (string.IsNullOrWhiteSpace(aiText) && geminiResponse?.PromptFeedback != null) + // 如果沒有獲取到文本且有安全過濾回饋，返回友好訊息 + if (string.IsNullOrWhiteSpace(aiText) && root.TryGetProperty("promptFeedback", out _)) { - // Return a fallback response instead of throwing return "The content analysis is temporarily unavailable due to safety filtering. Please try with different content."; } @@ -428,7 +490,6 @@ internal class AiVocabularyAnalysis public string? PartOfSpeech { get; set; } public string? Pronunciation { get; set; } public string? DifficultyLevel { get; set; } - public bool IsIdiom { get; set; } public string? Frequency { get; set; } public List? Synonyms { get; set; } public string? Example { get; set; } @@ -437,9 +498,13 @@ internal class AiVocabularyAnalysis internal class AiIdiom { - public string? Phrase { get; set; } + public string? Idiom { get; set; } public string? Translation { get; set; } public string? Definition { get; set; } + public string? Pronunciation { get; set; } + public string? DifficultyLevel { get; set; } + public string? Frequency { get; set; } + public List? Synonyms { get; set; } public string? Example { get; set; } public string? ExampleTranslation { get; set; } } \ No newline at end of file