jukebox

local RECORDS = {
    { "blocks", "minecraft:music_disc.blocks" },
    { "cat", "minecraft:music_disc.cat" },
    { "chirp", "minecraft:music_disc.chirp" },
    { "far", "minecraft:music_disc.far" },
    { "mall", "minecraft:music_disc.mall" },
    { "mellohi", "minecraft:music_disc.mellohi" },
    { "stal", "minecraft:music_disc.stal" },
    { "strad", "minecraft:music_disc.strad" },
    { "ward", "minecraft:music_disc.ward" },
    { "wait", "minecraft:music_disc.wait" },
    { "pigstep", "minecraft:music_disc.pigstep" },
}

---@type peripheral.Speaker
local SPEAKER = peripheral.find("speaker")
local WIDTH, HEIGHT = term.getSize()

local PAGE_SIZE = HEIGHT - 2
local PAGE_COUNT = math.ceil(#RECORDS / PAGE_SIZE)

local selection = 1
local playing = 0

---@param y number
---@param text string
local function writeCenter(y, text)
    local length = string.len(text)

    term.setCursorPos(math.floor(WIDTH / 2 - length / 2), y)
    write(text)
end

---@param x number
---@param y number
---@param text string
local function writeRight(x, y, text)
    local length = string.len(text)

    term.setCursorPos(x - length, y)
    write(text)
end

local function displayRecords()
    term.clear()
    term.setTextColor(colors.purple)
    writeCenter(1, "Jukebox")

    local currentPage = math.floor(selection / PAGE_SIZE)

    for offset = 1, PAGE_SIZE do
        local recordIndex = currentPage * PAGE_SIZE + offset
        local recordInfo = RECORDS[recordIndex]

        if not recordInfo then
            break
        end

        local name = recordInfo[1]

        term.setTextColor(colors.lightGray)

        if selection == recordIndex then
            term.setTextColor(colors.white)

            name = "> " .. name
        end

        name = string.format("%d. %s", offset, name)

        term.setCursorPos(2, offset + 2)
        write(name)
    end

    local playingRecord = RECORDS[playing]
    local playingName = playingRecord and playingRecord[1] or "None"

    term.setTextColor(colors.lightGray)
    writeRight(WIDTH, 2, string.format("Playing: %s", playingName))
    writeRight(WIDTH, HEIGHT, string.format("P. %d/%d", currentPage + 1, PAGE_COUNT))
end

displayRecords()

while true do
    local _, key = os.pullEvent("key")

    if key == keys.up then
        selection = math.max(selection - 1, 1)
    elseif key == keys.down then
        selection = math.min(selection + 1, #RECORDS)
    elseif key == keys.enter then
        local info = RECORDS[selection]

        if SPEAKER.playSound(info[2], 2, 1) then
            playing = selection
        end
    end

    displayRecords()
end