local utils = {}

function utils.promptChoices(choices, default)
    local c = default or 1
    local ox, oy = term.getCursorPos()
    while true do
        term.setCursorPos(ox, oy)
        for i, choice in ipairs(choices) do
            if i == c then
                term.setTextColor(colors.white)
            else
                term.setTextColor(colors.lightGray)
            end
            local label = choice
            if type(choice) == "table" then
                label = choice[1] or choice["label"]
            end
            print(label)
        end
        local event, key, is_held = os.pullEvent("key")
        if key == keys.up then
            c = math.max(1, c - 1)
        elseif key == keys.down then
            c = math.min(#choices, c + 1)
        elseif key == keys.enter then
            break
        end
    end
    term.setTextColor(colors.white)
    local choice = choices[c]
    if type(choice) == "table" then
        choice = choice[2] or choice["value"]
    end
    return choice
end

function utils.readFile(path)
    if not fs.exists(path) then
        printError("File " .. path .. " not found")
        return nil
    end
    local file = fs.open(path, "r")
    if not file then
        printError("Could not open file")
        return nil
    end
    local data = file.readAll()
    file.close()
    return data
end

function utils.writeFile(path, content, overwrite)
    overwrite = overwrite or false
    if not overwrite and fs.exists(path) then
        return true
    end
    local f = fs.open(path, "w")
    if not f then
        printError("Could not open file " .. path)
        return false
    end
    f.write(content)
    f.close()
    return true
end

function utils.waitForKey(targetKey)
    if targetKey then
        print("Press " .. keys.getName(targetKey):upper() .. " to continue")
    else
        print("Press any key to continue")
    end
    while true do
        local event, key, is_held = os.pullEvent("key")
        if not targetKey or key == targetKey then
            break
        end
    end
end

function utils.split(data, sep)
    local t = {}
    for str in string.gmatch(data, "([^" .. sep .. "]+)") do
        table.insert(t, str)
    end
    return t
end

function utils.splitLines(data)
    return utils.split(data, "\n")
end

function utils.round(x)
    return x >= 0 and math.floor(x + 0.5) or math.ceil(x - 0.5)
end

return utils