import { Image, coordinates } from "./image";
import { Chart } from "./chart";

// round to the 3rd decimal digit
function round3(val: number) {
  return (Math.round(val * Math.pow(10, 3)) / Math.pow(10, 3));
}

// sum the elements of the array in the range [from, to]
function sumVect(vect: number[], from: number, to: number) {
  let sum: number = 0;
  for (let i: number = from; i < to; i++) {
    sum += vect[i];
  }
  return sum;
}

// find the max in the sub-matrix specified by the two coordinates
function findMax(matrix: number[][], pixel1: coordinates, pixel2: coordinates) {
  let max = 0;
  for (let i = pixel1.x; i <= pixel2.x; i++) {
    for (let j = pixel1.y; j <= pixel2.y; j++) {
      if (matrix[i][j] > max) {
        max = matrix[i][j];
      }
    }
  }
  return max;
}

// prepara i dati per il grafico completo
function setDataForCompleteChart(image: Image, chart: Chart): number[] {
  // per ogni pixel sommo i conteggi di tutti i canali rilevati
  let data: number[] = [];
  data.length = image.depth;

  for (let i = 0; i < image.depth; i++) {
    data[i] = 0;
  }

  for (let i = 0; i < image.width; i++) {
    for (let j = 0; j < image.height; j++) {
      for (let k = 0; k < image.depth; k++) {
        data[k] += image.DataMatrix[i][j][k];
      }
    }
  }

  // riempio le stringhe con i dati per il grafico
  for (let i = 0; i < image.depth; i++) {
    chart.dataCompleteChart += (i + 1) + "," + data[i] + "\n";
    chart.dataCompleteChartCalibrated += round3(((i + 1) * image.calibration.a - image.calibration.b) / 1000) + "," + data[i] + "\n";
  }

  return data;
}


function getFirstDigitNumber(n: number): number {
  return parseInt(n.toString()[0]);
}

function isAnXHeader(value: number, image: Image): boolean {
  if (value > image.headerSetValue && getFirstDigitNumber(value) == image.xCoordHeaderFirstValue) {
    return true;
  }
  return false;
}
function isAnYHeader(value: number, image: Image): boolean {
  if (value > image.headerSetValue && getFirstDigitNumber(value) == image.yCoordHeaderFirstValue) {
    return true;
  }
  return false;
}

export { round3, sumVect, findMax, setDataForCompleteChart, getFirstDigitNumber, isAnXHeader, isAnYHeader };