using DramaLing.Api.Models.DTOs;
using DramaLing.Api.Models.Entities;
using DramaLing.Api.Services.AI.Gemini;

namespace DramaLing.Api.Services;

public interface IGeminiService
{
    Task<SentenceAnalysisData> AnalyzeSentenceAsync(string inputText, AnalysisOptions options);
    Task<string> GenerateImageDescriptionAsync(Flashcard flashcard, GenerationOptionsDto options);
}

/// <summary>
/// Gemini 服務 Facade，統一管理句子分析和圖片描述生成功能
/// </summary>
public class GeminiService : IGeminiService
{
    private readonly ISentenceAnalyzer _sentenceAnalyzer;
    private readonly IImageDescriptionGenerator _imageDescriptionGenerator;
    private readonly ILogger<GeminiService> _logger;

    public GeminiService(
        ISentenceAnalyzer sentenceAnalyzer,
        IImageDescriptionGenerator imageDescriptionGenerator,
        ILogger<GeminiService> logger)
    {
        _sentenceAnalyzer = sentenceAnalyzer ?? throw new ArgumentNullException(nameof(sentenceAnalyzer));
        _imageDescriptionGenerator = imageDescriptionGenerator ?? throw new ArgumentNullException(nameof(imageDescriptionGenerator));
        _logger = logger ?? throw new ArgumentNullException(nameof(logger));

        _logger.LogInformation("GeminiService Facade initialized successfully");
    }

    public async Task<SentenceAnalysisData> AnalyzeSentenceAsync(string inputText, AnalysisOptions options)
    {
        return await _sentenceAnalyzer.AnalyzeSentenceAsync(inputText, options);
    }


    public async Task<string> GenerateImageDescriptionAsync(Flashcard flashcard, GenerationOptionsDto options)
    {
        return await _imageDescriptionGenerator.GenerateImageDescriptionAsync(flashcard, options);
    }

}