import 'mocha';
import assert  from 'assert';
import { readFileSync } from 'fs';


let input = readFileSync('./input/2020-day-05.txt', 'utf-8')
    .split('\n');

let tasksResults: any[] = ['N/A', 'N/A'];

describe('Day 05', () => {
    before(() => { 
    })
    describe('task01', () => {
        it('parse data', () => {
            let d = ['BFFFBBFRRR', 'FFFBBBFRRR', 'BBFFBBFRLL'];
            let out = task01(d);
            assert.equal(out[0], 119);
            assert.equal(out[1], 567);
            assert.equal(out[2], 820);

            let seats = task01(input);
            tasksResults[0] = seats[seats.length - 1];
        })
    });
    describe('test02', () => {
        it('Calculate', () => {
            tasksResults[1] = task02(input);
        });
    });
    after(() => {
        console.log('\ntask 01:', tasksResults[0]);
        console.log('\ntask 02:', tasksResults[1]);
    });
});

function task01(input: string[]): number[] {
    return input
        .filter(id => !!id)
        .map(translate)
        .sort((a, b) => a - b);
}

function task02(input: string[]) {
    let all: number[] = task01(input);

    for (let i = 0; i < all.length; i++) {
        if (!all.includes(i) && all.includes(i - 1)) {
            return i;
        }
    }
}


function translate(input: string): number {
    return parseInt(
        input.replace(/./g, (i => {
            switch (i) {
                case 'F':
                case 'L': 
                    return '0';
                default:
                    return '1';
            }
        })), 2);
}