number-munchers/logic/troggle.logic.js

import { SETTINGS } from '../App';

const TroggleLogic = {
    move: function(currX, currY, muncherX, muncherY) {
        // Randomize movement with boolean flags.
        const moveToAttack = Boolean(Math.round(Math.random()));
        const moveAlongXAxis = Boolean(Math.round(Math.random()));
        const moveInPositiveDirection = Boolean(Math.round(Math.random()));

        let newX = currX;
        let newY = currY;

        // DO NOT CONSOLIDATE. Attack first, ask questions later.
        if (moveAlongXAxis === true) {
            if (currX >= SETTINGS.GRID_WIDTH - 1 ||
                (moveToAttack && currX > muncherX)) {
                newX = currX - 1;
            }
            else if (currX <= 0 ||
                (moveToAttack && currX < muncherX)) {
                newX = currX + 1;
            }
            else if (moveInPositiveDirection) {
                newX = currX + 1;
            }
            else if (!moveInPositiveDirection) {
                newX = currX - 1;
            }
        }
        else {
            if (currY >= SETTINGS.GRID_HEIGHT - 1 ||
                (moveToAttack && currY > muncherY)) {
                newY = currY - 1;
            }
            else if (currY <= 0 ||
                (moveToAttack && currY < muncherY)) {
                newY = currY + 1;
            }
            else if (moveInPositiveDirection) {
                newY = currY + 1;
            }
            else if (!moveInPositiveDirection) {
                newY = currY - 1;
            }
        }

        return { x: newX, y: newY };
    },

    create: function() {
        // Start outside grid at a randomized location.
        const enterOnXAxis = Boolean(Math.round(Math.random()));
        const enterFromPositive = Boolean(Math.round(Math.random()));

        let x = -1;
        let y = -1;

        if (enterFromPositive === true) {
            x = SETTINGS.GRID_WIDTH;
            y = SETTINGS.GRID_HEIGHT;
        }

        if (enterOnXAxis === true) {
            y = Math.round(Math.random() * (SETTINGS.GRID_HEIGHT - 1));
        }
        else {
            x = Math.round(Math.random() * (SETTINGS.GRID_WIDTH - 1));
        }

        return { x: x, y: y }
    }
};

export default TroggleAI;