package echomeet

import (
	"fmt"
	"strings"

	alitranslate "yunyan/sys/aliyun/translate"

	"yunyan/sys/aliyun/filetrans"
	"yunyan/sys/bytedance/audomodel"
	bdtranslate "yunyan/sys/bytedance/translate"
	"yunyan/sys/doubao"
	"yunyan/sys/google/gemini"
	gspeech "yunyan/sys/google/speech"
	gtranslate "yunyan/sys/google/translate"
	msspeech "yunyan/sys/microsoft/speech"
	mstranslate "yunyan/sys/microsoft/translate"
	"yunyan/sys/openai"
)

// 服务池 provider 标识 → 三类能力实例的构造注册表。
// 字段 key 与 console 服务商模板 seed（modules/console/api_svctemplate.go）严格对齐；
// 关键凭据缺失直接报错（fail-closed），不让空凭据实例静默失败在业务深处。

// need 取必填字段，缺失报错。
func need(f map[string]string, provider, key string) (string, error) {
	v := strings.TrimSpace(f[key])
	if v == "" {
		return "", fmt.Errorf("%s 缺少必填字段 %s", provider, key)
	}
	return v, nil
}

// buildTranscriber 构建识别（录音文件转写）实例。
func buildTranscriber(svc *resolvedSvc) (Transcriber, error) {
	f := svc.Fields
	switch strings.ToLower(svc.Provider) {
	case "bytedance":
		appid, err := need(f, "bytedance", "appid")
		if err != nil {
			return nil, err
		}
		token, err := need(f, "bytedance", "token")
		if err != nil {
			return nil, err
		}
		sys, err := audomodel.NewSys(audomodel.SetAppID(appid), audomodel.SetToken(token))
		if err != nil {
			return nil, err
		}
		return &byteDanceTranscriber{sys: sys}, nil
	case "alibaba":
		key, err := need(f, "alibaba", "api_key")
		if err != nil {
			return nil, err
		}
		// workspace_id 可选：填了走 qwen-audio-3.0-asr-flash-filetrans（27 语种），
		// 留空则退回老的 paraformer-v2（8 语种），保证存量配置升级后不中断。
		sys, err := filetrans.NewSys(
			filetrans.SetApiKey(key),
			filetrans.SetWorkspaceId(f["workspace_id"]),
		)
		if err != nil {
			return nil, err
		}
		return &aliTranscriber{sys: sys}, nil
	case "google":
		sys, err := newGoogleSpeech(f)
		if err != nil {
			return nil, err
		}
		return &googleTranscriber{sys: sys}, nil
	case "azure":
		key, err := need(f, "azure", "subscription_key")
		if err != nil {
			return nil, err
		}
		sys, err := msspeech.NewSys(msspeech.SetKey(key), msspeech.SetRegion(f["region"]))
		if err != nil {
			return nil, err
		}
		return &microsoftTranscriber{sys: sys}, nil
	default:
		return nil, fmt.Errorf("未支持的识别服务商: %s", svc.Provider)
	}
}

// newGoogleSpeech Google 语音客户端：json 字段既可存服务账号 JSON 内容（{ 开头）也可存文件路径。
func newGoogleSpeech(f map[string]string) (gspeech.ISys, error) {
	j, err := need(f, "google", "json")
	if err != nil {
		return nil, err
	}
	if strings.HasPrefix(strings.TrimSpace(j), "{") {
		return gspeech.NewSys(gspeech.SetJsonContent([]byte(j)))
	}
	return gspeech.NewSys(gspeech.SetJsonPath(j))
}

// buildTranslator 构建翻译实例。
func buildTranslator(svc *resolvedSvc) (Translator, error) {
	f := svc.Fields
	switch strings.ToLower(svc.Provider) {
	case "doubao", "volcengine", "bytedance": // 火山翻译
		ak, err := need(f, "volc", "access_key")
		if err != nil {
			return nil, err
		}
		sk, err := need(f, "volc", "secret_key")
		if err != nil {
			return nil, err
		}
		opts := []bdtranslate.Option{bdtranslate.SetAccessKey(ak), bdtranslate.SetSecretKey(sk)}
		if f["region"] != "" {
			opts = append(opts, bdtranslate.SetRegion(f["region"]))
		}
		sys, err := bdtranslate.NewSys(opts...)
		if err != nil {
			return nil, err
		}
		return &byteDanceTranslator{sys: sys}, nil
	case "alibaba":
		ak, err := need(f, "alibaba", "access_key_id")
		if err != nil {
			return nil, err
		}
		sk, err := need(f, "alibaba", "access_key_secret")
		if err != nil {
			return nil, err
		}
		sys, err := alitranslate.NewSys(alitranslate.SetAccessKeyId(ak), alitranslate.SetAccessKeySecret(sk))
		if err != nil {
			return nil, err
		}
		return &aliTranslator{sys: sys}, nil
	case "google":
		j, err := need(f, "google", "json")
		if err != nil {
			return nil, err
		}
		var sys gtranslate.ISys
		if strings.HasPrefix(strings.TrimSpace(j), "{") {
			sys, err = gtranslate.NewSys(gtranslate.SetJsonContent([]byte(j)))
		} else {
			sys, err = gtranslate.NewSys(gtranslate.SetJsonPath(j))
		}
		if err != nil {
			return nil, err
		}
		return &googleTranslator{sys: sys}, nil
	case "azure":
		key, err := need(f, "azure", "subscription_key")
		if err != nil {
			return nil, err
		}
		sys, err := mstranslate.NewSys(mstranslate.SetKey(key), mstranslate.SetRegion(f["region"]))
		if err != nil {
			return nil, err
		}
		return &microsoftTranslator{sys: sys}, nil
	default:
		return nil, fmt.Errorf("未支持的翻译服务商: %s", svc.Provider)
	}
}

// openAICompatBase 各 OpenAI 兼容服务商的默认接口地址（服务字段 base_url 可覆盖）。
var openAICompatBase = map[string]string{
	"qwen":     "https://dashscope.aliyuncs.com/compatible-mode/v1",
	"deepseek": "https://api.deepseek.com/v1",
}

// buildSummarizer 构建总结（大模型）实例。
// doubao 走豆包 SDK、google 走 Gemini，其余（openai/qwen/deepseek/azure 兼容端点…）统一走 OpenAI 兼容协议。
func buildSummarizer(svc *resolvedSvc) (Summarizer, error) {
	f := svc.Fields
	provider := strings.ToLower(svc.Provider)
	switch provider {
	case "doubao", "volcengine":
		key, err := need(f, "doubao", "api_key")
		if err != nil {
			return nil, err
		}
		model := strings.TrimSpace(f["endpoint_id"])
		if model == "" {
			model = strings.TrimSpace(f["model"])
		}
		if model == "" {
			return nil, fmt.Errorf("doubao 缺少 endpoint_id/model")
		}
		sys, err := doubao.NewSys(doubao.SetApikey(key), doubao.SetModel(model))
		if err != nil {
			return nil, err
		}
		return &doubaoSummarizer{sys: sys}, nil
	case "google", "gemini":
		key, err := need(f, "gemini", "api_key")
		if err != nil {
			return nil, err
		}
		model, err := need(f, "gemini", "model")
		if err != nil {
			return nil, err
		}
		sys, err := gemini.NewSys(gemini.SetApikey(key), gemini.SetModel(model), gemini.SetEndpoint(f["endpoint"]))
		if err != nil {
			return nil, err
		}
		return &geminiSummarizer{sys: sys}, nil
	case "anthropic":
		return nil, fmt.Errorf("anthropic 暂无对应 sys 客户端，请改用 OpenAI 兼容代理接入")
	default: // openai / qwen / deepseek / azure 等 OpenAI 兼容端点
		key, err := need(f, provider, "api_key")
		if err != nil {
			return nil, err
		}
		model, err := need(f, provider, "model")
		if err != nil {
			return nil, err
		}
		base := strings.TrimSpace(f["base_url"])
		if base == "" {
			base = openAICompatBase[provider]
		}
		opts := []openai.Option{openai.SetToken(key), openai.SetModel(model), openai.SetMaxfunccall(1)}
		if base != "" {
			opts = append(opts, openai.SetBaseURL(base))
		}
		sys, err := openai.NewSys(opts...)
		if err != nil {
			return nil, err
		}
		return &openaiSummarizer{sys: sys}, nil
	}
}