require("app.app")
local httpclient = require("httpclient")


local M = {}

M.eval_url = "https://edu.hivoice.cn/eval/"


local function resolve_eval_format(format)
    format = string.lower(tostring(format or "pcm"))
    if format == "wav" or format == "pcm" then
        return format, "pcm"
    end
    return format, format
end


local function build_multipart_body(parts, boundary)
    local payload = ""
    for _, part in ipairs(parts) do
        payload = payload .. "--" .. boundary .. "\r\n"
        if part.filename then
            payload = payload .. 'Content-Disposition: form-data; name="' .. part.name .. '"; filename="' .. part.filename .. '"\r\n'
            payload = payload .. "Content-Type: " .. (part.content_type or "application/octet-stream") .. "\r\n\r\n"
        else
            payload = payload .. 'Content-Disposition: form-data; name="' .. part.name .. '"\r\n\r\n'
        end
        payload = payload .. (part.data or "") .. "\r\n"
    end
    payload = payload .. "--" .. boundary .. "--\r\n"
    return payload
end


M.eval = function(text, mode, format, voice, config)
    local file_format, url_format = resolve_eval_format(format)
    local boundary = "----WebKitFormBoundary" .. tostring(os.time())
    local payload = build_multipart_body({
        { name = "text", data = tostring(text) },
        { name = "mode", data = tostring(mode) },
        {
            name = "voice",
            data = voice,
            filename = "voice." .. file_format,
            content_type = "application/octet-stream",
        },
    }, boundary)
    local result, err = httpclient.post(M.eval_url .. url_format, {
        ["Content-Type"] = "multipart/form-data; boundary=" .. boundary,
        ["session-id"] = fw.make_software_guid(),
        ["appkey"] = config.appkey .. "@" .. config.appsecret,
        ["Wrap-Create-Time"] = "true",
    }, payload)
    if result then
        
        return true, cjson.decode(err)
    end 
    print(err)
    return false, err
end


return M