import { KeyName } from "../Applet/Keyboard";
import { DrawSet, Layer } from "../Applet/Render";
import { Data as EcsData } from "../Ecs/Components";
import { copy, Join, SparseStore } from "../Ecs/Data";
import { DumbMotion } from "../Ecs/Location";
import { INPUT_FREQUENCY, LockstepProcessor } from "../Ecs/Lockstep";
import { Buttons } from "./Input";

export enum GamePhase {
    TITLE,
    PLAYING,
    LOST,
    WON
}
export type RGB = [number, number, number];
export class World {
    width = 500;
    height = 400;

    /*
     * Core Game Status
     */
    phase = GamePhase.TITLE;
    score = 0;

    constructor() {}

    /*
     * Drawing Layers
     */
    groundLayer = new Layer(0);
    debugLayer = new Layer(2);
    bulletLayer = new Layer(10);
    playerLayer = new Layer(15);
    smokeLayer = new Layer(16);
    hudLayer = new Layer(20);

    bgColor: RGB = [255, 255, 255];

    /**
     * Catch-all debug tool
     */
    debug: Record<string, any> = {};

    drawHud(drawSet: DrawSet) {
        drawSet.queue(this.hudLayer.toRender((cx, dt) => {
            cx.font = "16px monospace";
            cx.textAlign = "left";
            cx.textBaseline = "middle";

            const score = `Score: ${this.score}`;
            cx.fillStyle = "#000";
            cx.fillText(score, this.width/3 + 1, this.height - 18 + 1, this.width/4);
            cx.fillStyle = "#0ff";
            cx.fillText(score, this.width/3, this.height - 18, this.width/4);
        }));
    }
}

export class Data extends EcsData {
    boss: SparseStore<Boss> = {};
    bullet: SparseStore<Bullet> = {};
    hp: SparseStore<Hp> = {};
    lifetime: SparseStore<Lifetime> = {};
    message: SparseStore<Message> = {};

    constructor(source?: Partial<Data>) {
        super(source);
        if(source?.boss) this.boss = copy(source.boss);
        if(source?.bullet) this.bullet = copy(source.bullet);
        if(source?.hp) this.hp = copy(source.hp);
        if(source?.lifetime) this.lifetime = copy(source.lifetime);
        if(source?.message) this.message = copy(source.message);
    }
}

export enum Teams {
    PLAYER,
    ENEMY
}
export class Bullet {
    hit = false;
    constructor(
        public team: Teams,
        public attack: number
    ) {};
}
export class Hp {
    receivedDamage = 0;
    constructor(
        public team: Teams,
        public hp: number
    ) {};
}

export class Lifetime {
    constructor(
        public time: number
    ) {};
}

export class Boss {
    constructor(
        public name: string
    ) {}
}

export class Message {
    targetY = 0;
    constructor(
        public layer: Layer,
        public color: string,
        public message: string,
        public timeout = 3
    ) {}
}

export class Engine implements LockstepProcessor<KeyName[], Data> {
    cloneState(old: Data) {
        return new Data(old);
    }

    compareInput(a: KeyName[], b: KeyName[]): boolean {
        if (a.length != b.length) return false;

        let matches = true;
        a.forEach((keyA, i) => {
            if (keyA != b[i]) {
                matches = false;
            }
        });

        return matches;
    }

    advanceState(state: Data, input: KeyName[]) {
        DumbMotion(state, INPUT_FREQUENCY);
        Join(state, "location").forEach(([location]) => {
            let dir = 0;
            if(input.indexOf("left") != -1) {
                dir -= 1;
            }
            if(input.indexOf("right") != -1) {
                dir += 1;
            }
            location.VAngle = dir * 0.01;
        });
    }
}