// IMPORTS
import * as fs from "fs";
import { mergeSort } from "./mergeSort.js";
import { findDistancesFromAllElementsToAllReferencePoints } from "./findPaths.js";
import { aggregatePaths } from "./aggregatePaths.js";

// DEFS
const inputLinksFilePath = "./input/input-links.json";
const inputListFilePath = "./input/input-list.json";
const outputFilePath = "./output/output.json";

// HELPERS

const findElementPosition = (name, orderedList) => {
  let node = orderedList.find((node) => node.name == name);
  return node.position;
};

// MAIN
async function main() {
  // read file
  const inputLinksAsString = fs.readFileSync(inputLinksFilePath);
  const inputListAsString = fs.readFileSync(inputListFilePath);
  const links = JSON.parse(inputLinksAsString);
  const list = JSON.parse(inputListAsString);

  // process file
  // const sources = links.map((link) => link.source);
  // const targets = links.map((link) => link.target);
  // const list = [...new Set([...sources, ...targets])];

  // Merge sort
  let mergeSortOutput = mergeSort({ list, links });
  // console.log("Output: ");
  if (mergeSortOutput.finishedOrderingList == false) {
    console.log("Merge could not proceed");
    console.group();
    console.log("Elements which need to be compared:");
    console.log(mergeSortOutput.uncomparedElements);
    console.groupEnd();
  } else {
    let orderedList = mergeSortOutput.orderedList;
    // console.log(orderedList);
    console.log("Sorted output: ");
    console.group();
    console.log(orderedList.map((x) => x.name));
    console.groupEnd();
    console.log("");

    // find Paths
    let nodes = orderedList.map((element, i) => ({
      ...element,
      position: i,
    }));
    const linksWithPosition = links.map((link) => ({
      ...link,
      sourceElementPosition: findElementPosition(link.source, nodes),
      targetElementPosition: findElementPosition(link.target, nodes),
    }));
    let paths = await findDistancesFromAllElementsToAllReferencePoints({
      nodes,
      links: linksWithPosition,
    });
    // console.log(JSON.stringify(paths, null, 4));

    // Aggregate paths.
    let aggregatedPaths = aggregatePaths(paths, nodes);
    console.log(aggregatedPaths);
  }
}
main();