---@class Baidu: TransBackendOnline
---@field conf { app_id: string, app_passwd: string }
local M = {
    name         = 'baidu',
    display_text = '百度',
    uri          = 'https://fanyi-api.baidu.com/api/trans/vip/translate',
    salt         = tostring(math.random(bit.lshift(1, 15))),
    method       = 'get',
}

local Trans = require 'Trans'

---@class BaiduQuery
---@field q string
---@field from string
---@field to string
---@field appid string
---@field salt string
---@field sign string

---Get content for query
---@param data TransData
---@return BaiduQuery
function M.get_query(data)
    local m_conf = M.conf
    assert(m_conf, 'Load Baidu config failed')

    local tmp  = m_conf.app_id .. data.str .. M.salt .. m_conf.app_passwd
    local sign = Trans.util.md5.sumhexa(tmp)

    return {
        q     = data.str,
        from  = data.from,
        to    = data.to,
        appid = m_conf.app_id,
        salt  = M.salt,
        sign  = sign,
    }
end

---@overload fun(body: table, data:TransData): TransResult
---Query Using Baidu API
---@param body table BaiduQuery Response
---@return table|false
function M.formatter(body, data)
    local result = body.trans_result
    if not result then return false end

    -- TEST :whether multi result
    assert(#result == 1)
    result = result[1]
    return {
        str = result.src,
        [data.from == 'en' and 'translation' or 'definition'] = { result.dst },
    }
end

return M





















-- NOTE :free tts:
-- https://zj.v.api.aa1.cn/api/baidu-01/?msg=我爱你&choose=0&su=100&yd=5
-- 选择转音频的人物，女生1 输入0 ｜ 女生2输入：5｜男生1 输入：1｜男生2 输入：2｜男生3 输入：3
-- {
--   body = '{"from":"en","to":"zh","trans_result":[{"src":"require","dst":"\\u8981\\u6c42"}]}',
--   exit = 0,
--   headers = { "Content-Type: application/json", "Date: Thu, 09 Mar 2023 14:01:09 GMT", 'P3p: CP=" OTI DSP COR IVA OUR IND COM "', "Server: Apache", "Set-Cookie: BAIDUID=CB6D99CCD3B5F5278B5BE9428F002FC3:FG=1; expires=Fri, 08-Mar-24 14:01:09 GMT; max-age=31536000; path=/; domain=.baidu.com; version=1", "Tracecode: 00696104432377504778030922", "Content-Length: 79", "", "" },
--   status = 200
-- }