NumberGuess.lua

local gg = gg

local Difficulty = {
    EASY = 1,
    MEDIUM = 2,
    HARD = 3,
    INSANITY = 4
}

local function getMaxAttemp(difficulty)
    if (difficulty == Difficulty.EASY) then
        return 5
    elseif (difficulty == Difficulty.MEDIUM) then
        return 10
    elseif (difficulty == Difficulty.HARD) then
        return 20
    elseif (difficulty == Difficulty.INSANITY) then
        return 30
    end
end

local function getMaxNumberToGuess(difficulty)
    if (difficulty == Difficulty.EASY) then
        return 10
    elseif (difficulty == Difficulty.MEDIUM) then
        return 100
    elseif (difficulty == Difficulty.HARD) then
        return 1000
    elseif (difficulty == Difficulty.INSANITY) then
        return 10000
    end
end

local function getDifficulty()
    local choice = gg.choice({
        string.format("Easy  (1-%d)", getMaxNumberToGuess(Difficulty.EASY)),
        string.format("Medium  (1-%d)", getMaxNumberToGuess(Difficulty.MEDIUM)),
        string.format("Hard  (1-%d)", getMaxNumberToGuess(Difficulty.HARD)),
        string.format("Insanity  (1-%d)", getMaxNumberToGuess(Difficulty.INSANITY))
    }, 0, "Number Guess")
    if (not choice) then return end
    return choice
end

local function printHelp()
    local text =
        [[Number Guess
------------
1. Choose difficulty
2. Guess the number
3. Enjoy the game

Difficulties
----------
1. Easy  (1-10) Max attemp: ]] .. getMaxAttemp(Difficulty.EASY) .. [[

2. Medium  (1-100) Max attemp: ]] .. getMaxAttemp(Difficulty.MEDIUM) .. [[

3. Hard  (1-1000) Max attemp: ]] .. getMaxAttemp(Difficulty.HARD) .. [[

4. Insanity  (1-10000) Max attemp: ]] .. getMaxAttemp(Difficulty.INSANITY)

    print(text)
end


local function play()
    local difficulty = getDifficulty()
    if (not difficulty) then return end

    local maxAttemp = getMaxAttemp(difficulty)
    local maxNumberToGuess = getMaxNumberToGuess(difficulty)
    math.randomseed(os.time())
    local number = math.random(1, maxNumberToGuess)

    local attemp = 0
    local lastGuess = 0
    while attemp < maxAttemp do
        local input = gg.prompt({
            string.format("Guess the number (1-%d)", maxNumberToGuess)
        }, { lastGuess }, { "number" })
        if (not input) then return end

        local guess = tonumber(input[1])

        if (not guess) then
            gg.alert("Invalid input")
            return
        end

        attemp = attemp + 1
        lastGuess = guess
        if (guess == number) then
            gg.alert(string.format("You win! The number is %d\nAttemp: %d/%d", number, attemp, maxAttemp))
        else
            gg.alert(
                string.format("Wrong! The number is %s\n Attemp: %d/%d", guess < number and "higher" or "lower",
                    attemp, maxAttemp)
            )
        end
    end
end

local function main()
    local choice = gg.choice({
        "( * ) Play",
        "( * ) Help",
        "( * ) Exit"
    }, 0, "Number Guess")
    if (not choice) then return end

    if (choice == 1) then
        play()
    end

    if (choice == 2) then
        printHelp()
        gg.setVisible(true)
        os.exit()
    end

    if (choice == 3) then
        print("Goodbye!")
        os.exit()
    end
end


while true do
    if gg.isVisible() then
        gg.setVisible(false)
        main()
    end
end