package echomeet

import (
	"context"
	"fmt"

	"yunyan/pb"
	"yunyan/sys/google/gemini"
	gspeech "yunyan/sys/google/speech"
	gtranslate "yunyan/sys/google/translate"
)

// Google 系单元服务实例（由 provider_registry.go 按服务池字段构造）：
// 转写=Cloud Speech、翻译=Cloud Translation、总结=Gemini。

// Google Cloud Speech-to-Text V1 LongRunningRecognize（要求 gs:// 音频）
type googleTranscriber struct {
	sys gspeech.ISys
}

func (this *googleTranscriber) Submit(_ context.Context, req SubmitRequest) (*SubmitResult, error) {
	taskID, err := this.sys.CreateTask(req.AudioURL, req.Language, req.EnableSpeaker, req.CallbackURL)
	if err != nil {
		return nil, fmt.Errorf("google speech create task: %w", err)
	}
	return &SubmitResult{TaskID: taskID}, nil
}

func (this *googleTranscriber) Query(_ context.Context, taskID, _ string) (*QueryResult, error) {
	status, contexts, err := this.sys.QueryTask(taskID)
	switch status {
	case gspeech.StatusSuccess:
		out := make([]*pb.ContextStruct, 0, len(contexts))
		for _, c := range contexts {
			out = append(out, &pb.ContextStruct{
				Content:   c.Content,
				Starttime: c.StartTime,
				Endtime:   c.EndTime,
				Speaker:   c.Speaker,
			})
		}
		return &QueryResult{Status: StatusSuccess, Contexts: out}, nil
	case gspeech.StatusRunning:
		return &QueryResult{Status: StatusRunning}, nil
	default:
		return &QueryResult{Status: StatusFailed}, fmt.Errorf("google speech query failed: %w", err)
	}
}

// Google Cloud Translation v3
type googleTranslator struct {
	sys gtranslate.ISys
}

func (this *googleTranslator) Translate(ctx context.Context, from, to string, texts []string) ([]string, error) {
	return this.sys.Translate(ctx, toGoogleTranslateLang(from), toGoogleTranslateLang(to), texts)
}

// Gemini 总结
type geminiSummarizer struct {
	sys gemini.ISys
}

func (this *geminiSummarizer) Chat(ctx context.Context, messages []ChatMessage) (string, error) {
	if this.sys == nil {
		return "", fmt.Errorf("gemini summarizer not initialized")
	}
	msgs := make([]gemini.Message, 0, len(messages))
	for _, m := range messages {
		msgs = append(msgs, gemini.Message{Role: m.Role, Content: m.Content, Images: m.Images})
	}
	resp, err := this.sys.Chat(ctx, msgs)
	if err != nil {
		return "", err
	}
	if resp == nil {
		return "", fmt.Errorf("gemini chat: empty response")
	}
	return resp.Content, nil
}