using Microsoft.Extensions.Options;

namespace MeetingAssistant.Transcription;

public sealed class ConfiguredSpeechRecognitionPipelineFactory : ISpeechRecognitionPipelineFactory
{
    private readonly IServiceProvider services;
    private readonly MeetingAssistantOptions options;

    public ConfiguredSpeechRecognitionPipelineFactory(
        IServiceProvider services,
        IOptions<MeetingAssistantOptions> options)
    {
        this.services = services;
        this.options = options.Value;
    }

    public ISpeechRecognitionPipeline Create()
    {
        return options.Recording.TranscriptionProvider switch
        {
            "funasr" => ActivatorUtilities.CreateInstance<FunAsrSpeechRecognitionPipeline>(services),
            "whisper-local" => ActivatorUtilities.CreateInstance<WhisperLocalSpeechRecognitionPipeline>(services),
            "azure-speech" => ActivatorUtilities.CreateInstance<AzureSpeechRecognitionPipeline>(services),
            _ => throw new InvalidOperationException(
                $"Unsupported speech recognition pipeline '{options.Recording.TranscriptionProvider}'.")
        };
    }
}