import { readFileSync } from 'node:fs';

let sampleMode = false;
let usedArray = [];

const sampleArray = readFileSync('sample.txt').toString().split("\n");
const inputArray = readFileSync('input.txt').toString().split("\n");

if (sampleMode) {
  usedArray = sampleArray;
} else {
  usedArray = inputArray;
}

// Part One

console.time("part1");

let newInput = JSON.parse(JSON.stringify(usedArray));
for (let i = 0; i < newInput.length; i++) {
  newInput[i] = newInput[i].split("");
}

for (let i = 1; i < newInput.length; i++) {
  for (let j = 0; j < newInput[i].length; j++) {
    if ((newInput[i - 1][j] === '|' || newInput[i - 1][j] === 'S') && newInput[i][j] === '.') {
      newInput[i][j] = '|';
    }
    if (newInput[i - 1][j] === '|' && newInput[i][j] === '^') {
      if (j > 0 && newInput[i][j - 1] === '.') {
        newInput[i][j - 1] = '|';
      }
    }
    if (newInput[i - 1][j] === '|' && newInput[i][j] === '^') {
      if (j < newInput[i].length - 1 && newInput[i][j + 1] === '.') {
        newInput[i][j + 1] = '|';
      }
    }
  }
}

let splits = 0;

for (let i = 1; i < newInput.length; i++) {
  for (let j = 0; j < newInput[i].length; j++) {
    if (newInput[i][j] === '^' && newInput[i - 1][j] === '|') {
      splits++;
    }
  }
}

console.timeEnd("part1");
console.log(splits);


// Part Two

console.time("part2");

newInput = JSON.parse(JSON.stringify(usedArray));
for (let i = 0; i < newInput.length; i++) {
  newInput[i] = newInput[i].split("");
}

for (let i = 1; i < newInput.length; i++) {
  for (let j = 0; j < newInput[i].length; j++) {
    if (newInput[i - 1][j] === 'S') {
      newInput[i][j] = 1;
    }
    if (Number.parseInt(newInput[i - 1][j]) > 0 && Number.parseInt(newInput[i][j]) > 0) {
      newInput[i][j] = newInput[i][j] + newInput[i - 1][j];
    }
    if ((Number.parseInt(newInput[i - 1][j]) > 0) && newInput[i][j] === '.') {
      newInput[i][j] = newInput[i - 1][j];
    }
    if (Number.parseInt(newInput[i - 1][j]) > 0 && newInput[i][j] === '^') {
      if (j > 0 && newInput[i][j - 1] === '.') {
        newInput[i][j - 1] = newInput[i - 1][j];
      } else if (j > 0 && Number.parseInt(newInput[i][j - 1]) > 0) {
        newInput[i][j - 1] = Number.parseInt(newInput[i][j - 1]) + newInput[i - 1][j];
      }
      if (j < newInput[i].length - 1 && newInput[i][j + 1] === '.') {
        newInput[i][j + 1] = newInput[i - 1][j];
      } else if (j < newInput[i].length - 1 && Number.parseInt(newInput[i][j + 1]) > 0) {
        newInput[i][j + 1] = Number.parseInt(newInput[i][j + 1]) + newInput[i - 1][j];
      }
    }
  }
}

let timelines = 0;

const bottomRow = newInput[newInput.length - 1];
for (let i = 0; i < bottomRow.length; i++) {
  if (Number.parseInt(bottomRow[i]) > 0) {
    timelines += Number.parseInt(bottomRow[i]);
  }
}

console.timeEnd("part2");
console.log(timelines);

// functions