04. Game of Epicness js exam

function solve(arrayOfKingdoms, fightingKingdoms) {
  const kingdoms = {};

  function getTotal(kingdom, type) {
    return Object.keys(kingdom).reduce((acc, cur) => (acc + kingdom[cur][type]), 0);
  }

  arrayOfKingdoms.forEach((element) => {
    const { kingdom, general } = element;

    const army = +element.army;

    if (!kingdoms.hasOwnProperty(kingdom)) {
      kingdoms[kingdom] = {
        [general]: { army, wins: 0, losses: 0 },
      };
    } else if (kingdoms[kingdom].hasOwnProperty([general])) {
      kingdoms[kingdom][general].army += army;
    } else {
      kingdoms[kingdom][general] = {
        army,
        wins: 0,
        losses: 0,
      };
    }
  });

  for (const element of fightingKingdoms) {
    const [attackKingdom, attackGeneral, deffendKingdom, deffendGeneral] = element;
    let armyAttack = 0;
    let armyDeffend = 0;

    if (
      kingdoms.hasOwnProperty(attackKingdom)
          && kingdoms.hasOwnProperty(deffendKingdom)
    ) {
      if (kingdoms[attackKingdom] === kingdoms[deffendKingdom]) {
        continue;
      }
      if (
        kingdoms[attackKingdom].hasOwnProperty(attackGeneral)
              && kingdoms[deffendKingdom].hasOwnProperty(deffendGeneral)
      ) {
        armyAttack = kingdoms[attackKingdom][attackGeneral].army;
        armyDeffend = kingdoms[deffendKingdom][deffendGeneral].army;
      }
    }

    if (armyAttack > armyDeffend) {
      kingdoms[attackKingdom][attackGeneral].army = Math.floor(
        armyAttack + armyAttack * 0.1,
      );
      kingdoms[attackKingdom][attackGeneral].wins += 1;
      kingdoms[deffendKingdom][deffendGeneral].army = Math.floor(
        armyDeffend - armyDeffend * 0.1,
      );
      kingdoms[deffendKingdom][deffendGeneral].losses += 1;
    } else if (armyAttack < armyDeffend) {
      kingdoms[deffendKingdom][deffendGeneral].army = Math.floor(
        armyDeffend + armyDeffend * 0.1,
      );
      kingdoms[deffendKingdom][deffendGeneral].wins += 1;
      kingdoms[attackKingdom][attackGeneral].army = Math.floor(
        armyAttack - armyAttack * 0.1,
      );
      kingdoms[attackKingdom][attackGeneral].losses += 1;
    }
  }

  const orderedKingdoms = Object.keys(kingdoms).sort(
    (a, b) => getTotal(kingdoms[b], 'wins') - getTotal(kingdoms[a], 'wins')
          || getTotal(kingdoms[a], 'losses') - getTotal(kingdoms[b], 'losses')
          || a.localeCompare(b),
  );
  const winner = orderedKingdoms[0];
  console.log(`Winner: ${winner}`);
  const generals = Object.keys(kingdoms[winner]).sort(
    (a, b) => kingdoms[winner][b].army - kingdoms[winner][a].army,
  );
  generals.forEach((general) => {
    const info = kingdoms[winner][general];
    console.log(`/\\general: ${general}`);
    console.log(`---army: ${info.army}`);
    console.log(`---wins: ${info.wins}`);
    console.log(`---losses: ${info.losses}`);
  });
}