#!/usr/bin/env node
const fs = require("fs");
const path = require("path");

const src_path = path.join(__dirname, "..", "src");
let day = 1;

try {
    day = +fs.readdirSync(src_path).
        filter(i => i.includes("day")).
        sort((a, b) => {
            return +b.substring(3) - a.substring(3);
        })[0].substring(3) + 1;

    if (isNaN(day)) {
        console.log("day is nan");
        day = 1;
    }
} catch (e) {
    console.log("error", e.message);
    console.log("day is 1");
    day = 1;
}

const day_path = path.join(src_path, `day${day}`);
try { fs.unlinkSync(day_path); } catch (e) { }
try { fs.mkdirSync(day_path); } catch (e) { }

function create_class(item) {
    fs.writeFileSync(path.join(day_path, item.name), `export default class ${item.class} {
    constructor() {

    }
}`);
}

function create_function(item) {
    fs.writeFileSync(path.join(day_path, item.name), `export default function ${item.fn}(${item.args}): ${item.return} {

}`);
}

[{
    name: "single-linked-list.ts",
    class: "LinkedList",
}, {
    name: "doubly-linked-list.ts",
    class: "LinkedList",
}, {
    name: "array-list.ts",
    class: "ArrayList",
}, {
    name: "queue.ts",
    class: "Queue",
}, {
    name: "stack.ts",
    class: "Stack",
}].forEach(c => create_class(c));

[{
    name: "insertion-sort.ts",
    fn: "insertion_sort",
    args: "arr: number[]",
    "return": "void",
}, {
    name: "merge-sort.ts",
    fn: "merge_sort",
    args: "arr: number[]",
    "return": "void",
}].forEach(f => create_function(f));