package echomeet

const (
	MaxShortAudioProcess      = 10
	MaxLongAudioProcess       = 10
	MaxAIAwaitProcess         = 10
	TaskTypeShortAudioAwait   = "Echomeet:short_audio_await"
	TaskTypeShortAudioProcess = "Echomeet:short_audio_process"
	TaskTypeAIAwait           = "Echomeet:ai_await"
	TaskTypeAIAwaitProcess    = "Echomeet:ai_process"
	// TranscribeQueryMinInterval 主动查询第三方转写服务的最小间隔（秒）
	TranscribeQueryMinInterval int64 = 10
	// TranscribePollConcurrency 轮询第三方查询的并发度，避免 for 串行被单条慢请求拖住整轮
	TranscribePollConcurrency = 10
)

// toByteDanceLang 将内部 BCP-47 语言码转换为字节跳动 audomodel 支持的格式。
// 不在支持列表内返回空字符串，调用方应路由到其他引擎。
var bcp47ToByteDance = map[string]string{
	"":      "",
	"zh-CN": "zh", "zh-TW": "zh", "zh-HK": "zh",
	"en-US": "en-US", "en-GB": "en-US",
	"ja-JP": "ja-JP",
	"ko-KR": "ko-KR",
	"id-ID": "id-ID",
	"es-MX": "es-MX", "es-ES": "es-MX",
	"pt-BR": "pt-BR", "pt-PT": "pt-BR",
	"de-DE":  "de-DE",
	"fr-FR":  "fr-FR",
	"fil-PH": "fil-PH",
	"ms-MY":  "ms-MY",
	"th-TH":  "th-TH",
	"ar-SA":  "ar-SA",
}

func toByteDanceLang(bcp47 string) (lang string, supported bool) {
	lang, supported = bcp47ToByteDance[bcp47]
	return
}

// toDashScopeLang 将内部 BCP-47 语言码转换为 DashScope Paraformer-v2 支持的 language_hints 格式。
// 返回空字符串表示该语言不传 hints，由 DashScope 自动检测。
var bcp47ToDashScope = map[string]string{
	"zh-CN": "zh", "zh-TW": "zh", "zh-HK": "zh",
	"yue-HK": "yue",
	"en-US":  "en", "en-GB": "en",
	"ja-JP": "ja",
	"ko-KR": "ko",
	"ru-RU": "ru", "ru-UA": "ru",
	"vi-VN": "vi",
	"tr-TR": "tr",
	"pl-PL": "pl",
	"nl-NL": "nl",
	"it-IT": "it",
	"uk-UA": "uk",
	"de-DE": "de",
	"fr-FR": "fr",
	"es-ES": "es", "es-MX": "es",
	"pt-BR": "pt", "pt-PT": "pt",
	"ar-SA":  "ar",
	"id-ID":  "id",
	"ms-MY":  "ms",
	"th-TH":  "th",
	"fil-PH": "fil",
}

// toDashScopeLang 返回 DashScope language_hints 值，空字符串表示自动检测
func toDashScopeLang(bcp47 string) string {
	return bcp47ToDashScope[bcp47] // 不在 map 中自动返回 ""
}

// ============== 翻译平台语言码转换 ==============
// 输入统一是客户端的 BCP-47 码（如 zh-CN / en-US / ja-JP）；
// 每个平台有自己的接受格式，逐家做映射。未识别一律返回原值，让平台自己决定是否报错，
// 绝对不要 fallback 成 "zh"——那会让"未知语言→中文"出现在调用栈深处难以发现。

// 火山翻译 / 阿里 MT：短码 zh / en / ja / ...
var bcp47ToShortLang = map[string]string{
	"zh-CN": "zh", "zh-TW": "zh", "zh-HK": "zh",
	"en-US": "en", "en-GB": "en",
	"ja-JP": "ja",
	"ko-KR": "ko",
	"id-ID": "id",
	"es-MX": "es", "es-ES": "es",
	"pt-BR": "pt", "pt-PT": "pt",
	"de-DE":  "de",
	"fr-FR":  "fr",
	"fil-PH": "fil",
	"ms-MY":  "ms",
	"th-TH":  "th",
	"ar-SA":  "ar",
	"ru-RU":  "ru", "ru-UA": "ru",
	"vi-VN": "vi",
	"tr-TR": "tr",
	"pl-PL": "pl",
	"nl-NL": "nl",
	"it-IT": "it",
	"uk-UA": "uk",
}

// 火山翻译：BCP-47 → 短码（zh / en / ja ...）
func toByteDanceTranslateLang(bcp47 string) string {
	if v, ok := bcp47ToShortLang[bcp47]; ok {
		return v
	}
	return bcp47
}

// 阿里 MT：与火山相同的短码体系
func toAliTranslateLang(bcp47 string) string {
	if v, ok := bcp47ToShortLang[bcp47]; ok {
		return v
	}
	return bcp47
}

// Google Cloud Translation：直接接受 BCP-47（en / en-US / zh-CN 都支持），原样透传
func toGoogleTranslateLang(bcp47 string) string {
	return bcp47
}

// Azure Translator：中文要 zh-Hans / zh-Hant，其他用短 ISO（en / ja / ko ...）
var bcp47ToMicrosoft = map[string]string{
	"zh-CN": "zh-Hans", "zh-TW": "zh-Hant", "zh-HK": "zh-Hant",
	"en-US": "en", "en-GB": "en",
	"ja-JP": "ja",
	"ko-KR": "ko",
	"id-ID": "id",
	"es-MX": "es", "es-ES": "es",
	"pt-BR": "pt", "pt-PT": "pt",
	"de-DE":  "de",
	"fr-FR":  "fr",
	"fil-PH": "fil",
	"ms-MY":  "ms",
	"th-TH":  "th",
	"ar-SA":  "ar",
	"ru-RU":  "ru", "ru-UA": "ru",
	"vi-VN": "vi",
	"tr-TR": "tr",
	"pl-PL": "pl",
	"nl-NL": "nl",
	"it-IT": "it",
	"uk-UA": "uk",
}

func toMicrosoftTranslateLang(bcp47 string) string {
	if v, ok := bcp47ToMicrosoft[bcp47]; ok {
		return v
	}
	return bcp47
}

// isByteDanceSupported 判断 BCP-47 语言是否被字节跳动支持
func isByteDanceSupported(bcp47 string) bool {
	_, ok := bcp47ToByteDance[bcp47]
	return ok
}