-- API 地址 / API Endpoint
local API_URL = "http://ffmpeg.liulikeji.cn/api/ffmpeg"

-- 输入音频URL (可替换) / Input audio URL (replaceable)
local INPUT_URL = "https://git.liulikeji.cn/xingluo/CCTweaked-Demo/raw/branch/main/Demo/FFmpegApi-Demo/demo.mp3"

-- 主函数 / Main function
local function convertAndPlay()
    -- ===== 1. 准备请求数据 / Prepare request data =====
    local requestData = {
        input_url = INPUT_URL,
        args = { "-vn", "-ar", "48000", "-ac", "1" }, -- DFPWM转换参数 / DFPWM conversion args
        output_format = "dfpwm"
    }

    -- ===== 2. 发送HTTP请求 / Send HTTP request =====
    local response, err = http.post(
        API_URL,
        textutils.serializeJSON(requestData),
        { ["Content-Type"] = "application/json" }
    )

    -- ===== 3. 错误处理 / Error handling =====
    -- 网络错误 / Network error
    if not response then
        printError("HTTP request failed: " .. (err or "unknown error"))
        return
    end

    -- 读取响应 / Read response
    local responseBody = response.readAll()
    response.close()

    -- HTTP状态码检查 / HTTP status check
    local statusCode = response.getResponseCode()
    if statusCode ~= 200 then
        printError("API error (status "..statusCode..")")
        return
    end

    -- ===== 4. 解析JSON / Parse JSON =====
    local responseData = textutils.unserializeJSON(responseBody)
    if not responseData then
        printError("Invalid API response (bad JSON)")
        return
    end

    -- API业务错误 / API logic error
    if responseData.status ~= "success" then
        printError("Conversion failed: "..(responseData.error or "no error info"))
        return
    end

    -- ===== 5. 播放音频 / Play audio =====
    print("Conversion successful! Download URL:")
    print(responseData.download_url)
    print("Playing...")
    shell.run("speaker play "..responseData.download_url)
end

-- 执行 / Execute
convertAndPlay()