import { ObjectId } from 'mongodb'
import * as dotenv from 'dotenv'
import type { TextAuditServiceProvider } from 'src/utils/textAudit'
import { isNotEmptyString, isTextAuditServiceProvider } from '../utils/is'
import { AuditConfig, CHATMODELS, Config, KeyConfig, MailConfig, SiteConfig, TextAudioType, UserRole } from './model'
import { getConfig, getKeys, upsertKey } from './mongo'

dotenv.config()

let cachedConfig: Config | undefined
let cacheExpiration = 0

export async function getCacheConfig(): Promise<Config> {
  const now = Date.now()
  if (cachedConfig && cacheExpiration > now)
    return Promise.resolve(cachedConfig)

  const loadedConfig = await getOriginConfig()

  cachedConfig = loadedConfig
  cacheExpiration = now + 10 * 60 * 1000

  return Promise.resolve(cachedConfig)
}

export async function getOriginConfig() {
  let config = await getConfig()
  if (config == null) {
    config = new Config(new ObjectId(),
      !isNaN(+process.env.TIMEOUT_MS) ? +process.env.TIMEOUT_MS : 30 * 1000,
      process.env.OPENAI_API_KEY,
      process.env.OPENAI_API_DISABLE_DEBUG === 'true',
      process.env.OPENAI_ACCESS_TOKEN,
      process.env.OPENAI_API_BASE_URL,
      process.env.OPENAI_API_MODEL || 'ChatGPTAPI',
      process.env.API_REVERSE_PROXY,
      (process.env.SOCKS_PROXY_HOST && process.env.SOCKS_PROXY_PORT)
        ? (`${process.env.SOCKS_PROXY_HOST}:${process.env.SOCKS_PROXY_PORT}`)
        : '',
      (process.env.SOCKS_PROXY_USERNAME && process.env.SOCKS_PROXY_PASSWORD)
        ? (`${process.env.SOCKS_PROXY_USERNAME}:${process.env.SOCKS_PROXY_PASSWORD}`)
        : '',
      process.env.HTTPS_PROXY,
      new SiteConfig(
        process.env.SITE_TITLE || 'ChatGpt Web',
        isNotEmptyString(process.env.AUTH_SECRET_KEY),
        process.env.AUTH_SECRET_KEY,
        process.env.REGISTER_ENABLED === 'true',
        process.env.REGISTER_REVIEW === 'true',
        process.env.REGISTER_MAILS,
        process.env.SITE_DOMAIN),
      new MailConfig(process.env.SMTP_HOST,
        !isNaN(+process.env.SMTP_PORT) ? +process.env.SMTP_PORT : 465,
        process.env.SMTP_TSL === 'true',
        process.env.SMTP_USERNAME,
        process.env.SMTP_PASSWORD))
  }
  else {
    if (config.siteConfig.loginEnabled === undefined)
      config.siteConfig.loginEnabled = isNotEmptyString(process.env.AUTH_SECRET_KEY)
    if (config.siteConfig.loginSalt === undefined)
      config.siteConfig.loginSalt = process.env.AUTH_SECRET_KEY
    if (config.apiDisableDebug === undefined)
      config.apiDisableDebug = process.env.OPENAI_API_DISABLE_DEBUG === 'true'
    if (config.socksAuth === undefined) {
      config.socksAuth = (process.env.SOCKS_PROXY_USERNAME && process.env.SOCKS_PROXY_PASSWORD)
        ? (`${process.env.SOCKS_PROXY_USERNAME}:${process.env.SOCKS_PROXY_PASSWORD}`)
        : ''
    }
    if (config.siteConfig.registerReview === undefined)
      config.siteConfig.registerReview = process.env.REGISTER_REVIEW === 'true'
  }
  if (config.apiModel !== 'ChatGPTAPI' && config.apiModel !== 'ChatGPTUnofficialProxyAPI') {
    if (isNotEmptyString(config.accessToken))
      config.apiModel = 'ChatGPTUnofficialProxyAPI'
    else
      config.apiModel = 'ChatGPTAPI'
  }

  if (config.auditConfig === undefined) {
    config.auditConfig = new AuditConfig(
      process.env.AUDIT_ENABLED === 'true',
      isTextAuditServiceProvider(process.env.AUDIT_PROVIDER)
        ? process.env.AUDIT_PROVIDER as TextAuditServiceProvider
        : 'baidu',
      {
        apiKey: process.env.AUDIT_API_KEY,
        apiSecret: process.env.AUDIT_API_SECRET,
        label: process.env.AUDIT_TEXT_LABEL,
      },
      getTextAuditServiceOptionFromString(process.env.AUDIT_TEXT_TYPE),
      false,
      '',
    )
  }
  return config
}

function getTextAuditServiceOptionFromString(value: string): TextAudioType {
  if (value === undefined)
    return TextAudioType.None

  switch (value.toLowerCase()) {
    case 'request':
      return TextAudioType.Request
    case 'response':
      return TextAudioType.Response
    case 'all':
      return TextAudioType.All
    default:
      return TextAudioType.None
  }
}

export function clearConfigCache() {
  cacheExpiration = 0
  cachedConfig = null
}

let apiKeysCachedConfig: KeyConfig[] | undefined
let apiKeysCacheExpiration = 0

export async function getCacheApiKeys(): Promise<KeyConfig[]> {
  const now = Date.now()
  if (apiKeysCachedConfig && apiKeysCacheExpiration > now)
    return Promise.resolve(apiKeysCachedConfig)

  const loadedConfig = (await getApiKeys()).keys

  apiKeysCachedConfig = loadedConfig
  apiKeysCacheExpiration = now + 10 * 60 * 1000

  return Promise.resolve(apiKeysCachedConfig)
}

export function clearApiKeyCache() {
  apiKeysCacheExpiration = 0
  getCacheApiKeys()
}

export async function getApiKeys() {
  const result = await getKeys()
  if (result.keys.length <= 0) {
    const config = await getCacheConfig()
    if (config.apiModel === 'ChatGPTAPI')
      result.keys.push(await upsertKey(new KeyConfig(config.apiKey, 'ChatGPTAPI', [], [], '')))

    if (config.apiModel === 'ChatGPTUnofficialProxyAPI')
      result.keys.push(await upsertKey(new KeyConfig(config.accessToken, 'ChatGPTUnofficialProxyAPI', [], [], '')))

    result.total++
  }
  result.keys.forEach((key) => {
    if (key.userRoles == null || key.userRoles.length <= 0) {
      key.userRoles.push(UserRole.Admin)
      key.userRoles.push(UserRole.User)
      key.userRoles.push(UserRole.Guest)
    }
    if (key.chatModels == null || key.chatModels.length <= 0) {
      CHATMODELS.forEach((chatModel) => {
        key.chatModels.push(chatModel)
      })
    }
  })
  return result
}