tsg-ut/mnemo

module.exports = {
    name: 'factorial',
    version: 4,
    parts: {
        wireI: null,
        wireL: null,
        wireT: null,
        wireX: null,
        'times-2': null,
        'times-3': null,
        'plus-1': null,
        'plus-2': null,
        'minus-1': null,
        'minus-2': null,
        equal: null,
        add: null,
        sub: null,
        div: null,
        mul: null,
        conditional: null,
        transistor: null,
        diode: null,
    },
    inputX: 6,
    outputX: 6,
    input: [null, null, null, 15],
    output: [null, null, null, 1307674368000],
    ioGenerator: (random) => {
        const candidates = Array.from({length: 13}, (item, index) => index + 2); // 2..14
        const inputs = [];

        // Shuffle array and take heading 3
        const index1 = Math.floor(random() * 13);
        inputs.push(candidates[index1]);
        candidates[index1] = candidates[0];

        const index2 = Math.floor(random() * 12) + 1;
        inputs.push(candidates[index2]);
        candidates[index2] = candidates[1];

        const index3 = Math.floor(random() * 11) + 2;
        inputs.push(candidates[index3]);

        inputs.sort((a, b) => a - b);

        const factorial = (n) => (n === 1) ? 1 : n * factorial(n - 1);

        return {
            input: [
                inputs[0],
                inputs[1],
                inputs[2],
                15,
            ],
            output: [
                factorial(inputs[0]),
                factorial(inputs[1]),
                factorial(inputs[2]),
                factorial(15),
            ],
        };
    },
    width: 13,
    height: 13,
    clockLimit: 500,
    statement: '階乗を計算してみよう!',
    title: '階乗',
};