local speaker = peripheral.find("speaker")
local dfpwm = require("cc.audio.dfpwm")

local sounds = {
    {name = "notification", file = "notification.dfpwm"}
}

local function initialize()
    speaker = peripheral.find("speaker")
    if not speaker then
        print("Warning: No speaker attached.")
        return false
    end
    return true
end

local function play(name)
    if not speaker then return false end
    
    local filePath
    for _, sound in ipairs(sounds) do
        if sound.name == name then
            filePath = sound.file
            break
        end
    end

    if not filePath then
        print("Sound '" .. name .. "' not defined.")
        return false
    end

    if not fs.exists(filePath) then
        print("File '" .. filePath .. "' not found.")
        return false
    end

    local decoder = dfpwm.make_decoder()
    
    for chunk in io.lines(filePath, 16 * 1024) do
        local buffer = decoder(chunk)
        while not speaker.playAudio(buffer, 3.0) do
            os.pullEvent("speaker_audio_empty")
        end
    end
    return true
end

local function getFileName(name)
    local extension = ".dfpwm"
    local fullFile = name .. extension
    return fullFile
end

local function randomFileName()
    local name = ""
    for i = 1, 12 do
        name = name .. string.char(math.random(97, 122)) -- a–z
    end
    return name
end

local function playSound(fileName)
    local fileStream = getFileName(fileName)
    local decoder = dfpwm.make_decoder()
    local values = io.lines(fileStream, 16 * 1024)
    for input in values do
        local decoded = decoder(input)
        while not speaker.playAudio(decoded, 3.0) do
            os.pullEvent("speaker_audio_empty")
        end
    end
end

local function playTTSFile(value)
    local message = textutils.urlEncode(value)
    local url = "http://api.astrocore.space/api/TextToSpeech?message=" .. message
    local response, err = http.get { url = url, binary = true }

    if not response then
        print("TTS request failed: " .. (err or "unknown error"))
        return false
    end

    local name = randomFileName()
    local fileName = name .. ".dfpwm"

    local fileData = response.readAll()
    response.close()

    local file = fs.open(fileName, "wb")
    file.write(fileData)
    file.close()

    playSound(name)
    shell.execute("rm", fileName)
end

return { initialize = initialize, play = play, playTTSFile = playTTSFile }