let allPlaced = false;

// In standard Risk, this is 5
const _REINFORCEMENT_MULTIPLIER = 1;

export const REGIONS = {};

class Continent {
    constructor(name) {
        this.name = name;
        this.yield = 0;
    }
}

export class Region {
    constructor(name, continent) {
        this.name = name;
        this.owner = null;
        this.strength = 0;
        this.neighbours = new Set();
        this.continent = continent;

        REGIONS[name] = this;
    }

    static setNeighbours(region1, region2) {
        region1.neighbours.add(region2);
        region2.neighbours.add(region1);
    }

    static allRegionsClaimed() {
        return (
            Object.values(REGIONS).find((region) => region.owner === null) === undefined
        );
    }

    static reinforcementsRemaining() {
        if (allPlaced) {
            return 0;
        } else {
            let totalStrength = Object.values(REGIONS)
                .filter((region) => region.owner === us)
                .reduce((counter, region) => counter + region.strength, 0);
            let numPlayers = Object.values(players).length;

            return _REINFORCEMENT_MULTIPLIER * (10 - numPlayers) - totalStrength;
        }
    }

    static allReinforcementsPlaced() {
        if (allPlaced) {
            return true;
        } else {
            let totalStrength = Object.values(REGIONS).reduce(
                (counter, region) => counter + region.strength,
                0
            );
            let numPlayers = Object.values(players).length;

            allPlaced =
                totalStrength >=
                numPlayers * _REINFORCEMENT_MULTIPLIER * (10 - numPlayers);
            return allPlaced;
        }
    }

    static getRegion(name) {
        return REGIONS[name];
    }

    static getAllRegions() {
        return Object.values(REGIONS);
    }

    claim(player) {
        this.owner = player;
        this.strength = 1;
    }

    reinforce(amount) {
        this.strength += amount;
    }
}

const EAST = new Continent("East");
const WEST = new Continent("West");

const A = new Region("A", EAST);
const B = new Region("B", EAST);
const C = new Region("C", EAST);
const D = new Region("D", EAST);
const J = new Region("J", EAST);

const F = new Region("F", WEST);
const G = new Region("G", WEST);
const H = new Region("H", WEST);
const I = new Region("I", WEST);
const E = new Region("E", WEST);

Region.setNeighbours(A, B);
Region.setNeighbours(A, C);
Region.setNeighbours(B, C);
Region.setNeighbours(B, J);
Region.setNeighbours(C, D);
Region.setNeighbours(C, F);
Region.setNeighbours(E, J);
Region.setNeighbours(E, I);
Region.setNeighbours(E, H);
Region.setNeighbours(F, J);
Region.setNeighbours(F, G);
Region.setNeighbours(G, H);
Region.setNeighbours(G, I);
Region.setNeighbours(H, I);