import { readLines } from "../utils.ts";

export async function solveTask4part1() {
    const lines = await readLines('./4/example.txt');
    console.log(lines)

    // left to right
    const l2r = lines
        .map(findXmas)
        .reduce((p,c) => p+c, 0)
    // right to left
    const r2l = lines
        .map( l => [...l].reverse().join(""))
        .map(findXmas)
        .reduce((p,c) => p+c, 0)
    // top to bottom
    const t2b = [...lines[0]]
        .map( (_, i) => lines.map( l => l[i]).join('') )
        .map(findXmas)
        .reduce((p,c) => p+c, 0)
    // bottom to top
    const b2t = [...lines[0]]
        .map( (_, i) => lines.map( l => l[i]).join('') )
        .map( l => [...l].reverse().join(""))
        .map(findXmas)
        .reduce((p,c) => p+c, 0)
    
    // console.log(t2b)
    console.log(l2r, r2l, t2b, b2t)
    // const all = l2r + r2l + t2b;
    // console.log(all);
}

function findXmas(line:string) {
    let count = 0;
    let searchPos = 0;
    let foundPos = -1;
    while ((foundPos = line.indexOf('XMAS', searchPos)) > -1) {
        searchPos = foundPos + 1;
        count++
    } 
    return count;
}