adventofcode2022_4

const fs = require('fs');
const path = require('path');

// 2-4,6-8
// 2-3,4-5
// 5-7,7-9
// 2-8,3-7
// 6-6,4-6
// 2-6,4-8

const data = fs.readFileSync(path.join(__dirname, './input3.txt'), 'utf8');
const areas = data.split(/\r?\n/);

const game = (getCondition) => {
    let sum = 0;

    const createIdxAr = (value) => {
        const firstIdx = value.match(/^\d+/i)[0];
        const lastIdx = value.match(/\d+$/i)[0];

        const result = [];
        
        Array.from(Array(Number((lastIdx - firstIdx) + 1)).keys()).map(index => {
            result.push(Number(firstIdx) + index);
        });

        return result;
    };

    areas.forEach(area => {
        const firstZone = area.split(',')[0];
        const secondZone = area.split(',')[1];

        sum += getCondition(createIdxAr(firstZone), createIdxAr(secondZone));
    });

    return sum;
};

const conditionPart1 = (first, second) => {
    if (first.length >= second.length) {
        const isInitValueMatch = first[0] <= second[0];
        const isFinalValueMatch = first[first.length - 1] >= second[second.length - 1];

        return isInitValueMatch && isFinalValueMatch ? 1 : 0;
    }
    
    const isInitValueMatch = second[0] <= first[0];
    const isFinalValueMatch = second[second.length - 1] >= first[first.length - 1];

    return isInitValueMatch && isFinalValueMatch ? 1 : 0;
}

const conditionPart2 = (first, second) => {
    let matches = 0;

    first.forEach(item => {
        if (second.some(idx => idx === item) && !matches) {
            matches += 1;
        }
    })

    return matches;
}

const part1 = game(conditionPart1);
const part2 = game(conditionPart2);

console.log(part1, part2, 'game1');