02. Expedition js exam

function solve(primary, secondary, targets, startingPoint) {
  let steps = 1;
  const prMRows = primary.length;
  const prMCols = primary[0].length;
  const secMRows = secondary.length;
  const secMCols = secondary[0].length;

  const modifyPrimary = (coordinates) => {
    const row = Number(coordinates[0]);
    const col = Number(coordinates[1]);
    for (let i = 0; i < secMRows; i++) {
      if (i + row < prMRows) {
        for (let j = 0; j < secMCols; j++) {
          if (primary[i + row][j + col] !== undefined && secondary[i][j] === 1) {
            primary[i + row][j + col] = primary[i + row][j + col] === 0 ? 1 : 0;
          }
        }
      }
    }
  };

  const definePos = (currentPosition) => {
    const currentRow = currentPosition[0];
    const currentCol = currentPosition[1];

    if (currentRow === 0) {
      console.log('Top');
    } else if (currentRow === prMRows - 1) {
      console.log('Bottom');
    } else if (currentCol === 0) {
      console.log('Left');
    } else if (currentCol === prMCols - 1) {
      console.log('Right');
    } else if (currentRow < prMRows / 2 && currentCol >= prMCols / 2) {
      console.log('Dead end 1');
    } else if (currentRow < prMRows / 2 && currentCol < prMCols / 2) {
      console.log('Dead end 2');
    } else if (currentRow >= prMRows / 2 && currentCol < prMCols / 2) {
      console.log('Dead end 3');
    } else if (currentRow >= prMRows / 2 && currentCol >= prMCols / 2) {
      console.log('Dead end 4');
    }
  };

  targets.forEach((target) => {
    modifyPrimary(target);
  });

  let currentPosition = [startingPoint[0], startingPoint[1]];
  let previousDirection;
  const move = true;

  while (move) {
    if (currentPosition[0] + 1 < prMRows && primary[currentPosition[0] + 1][currentPosition[1]] === 0 && previousDirection !== 'up') {
      currentPosition = [currentPosition[0] + 1, currentPosition[1]];
      previousDirection = 'down';
    } else if (currentPosition[1] + 1 < prMCols && primary[currentPosition[0]][currentPosition[1] + 1] === 0 && previousDirection !== 'left') {
      currentPosition = [currentPosition[0], currentPosition[1] + 1];
      previousDirection = 'right';
    } else if (currentPosition[0] > 0 && primary[currentPosition[0] - 1][currentPosition[1]] === 0 && previousDirection !== 'down') {
      currentPosition = [currentPosition[0] - 1, currentPosition[1]];
      previousDirection = 'up';
    } else if (currentPosition[1] > 0 && primary[currentPosition[0]][currentPosition[1] - 1] === 0 && previousDirection !== 'right') {
      currentPosition = [currentPosition[0], currentPosition[1] - 1];
      previousDirection = 'left';
    } else {
      break;
    }
    steps++;
  }

  console.log(steps);
  definePos(currentPosition);
}