import { _decorator, Component, Node, Prefab, Vec2, Vec3, randomRangeInt, CCInteger, AudioClip } from 'cc';
import ObjectPool from '../Pool/ObjectPool';
import { Ball } from '../GamePlay/Ball';
import Utilities from '../Utilities';
import GameState from '../Enum/GameState';
import { EventManger } from './EventManger';
import GameEvent from '../Events/GameEvent';
import ScoreType from '../Enum/ScoreType';
import { FloatingText } from '../Environments/FloatingText';
import { SoundManager } from './SoundManager';
import TimeConfig from '../Enum/TimeConfig';
const { ccclass, property } = _decorator;

@ccclass('GameManager')
export class GameManager extends Component {
    //singleton
    private static _instance: GameManager = null;
    public static get instance(): GameManager {
        return GameManager._instance;
    }

    @property({ type: Prefab, visible: true })
    private _ballPrefab: Prefab;
    @property({ type: Prefab, visible: true })
    private _floatingScoreText: Prefab;
    @property({ type: Node, visible: true })
    private _floatingTextContainer: Node;
    @property({ visible: true })
    private _ballSpawnPosition: Vec3;
    @property({ type: CCInteger, visible: true })
    private readonly _timePlay = 3;
    @property({ type: AudioClip, visible: true })
    private _startSound: AudioClip;
    @property({ type: AudioClip, visible: true })
    private _backgroundMusic: AudioClip;

    private _ballPool: ObjectPool;
    private _FloatingScorePool: ObjectPool;
    private _gameState: GameState;
    private _timer: number;

    private _score = 0;
    private _isMultiBall = false;
    private _currentBallInGame = 0;

    public get score() {
        return this._score;
    }

    protected onLoad(): void {
        GameManager._instance = this;
        this._ballPool = new ObjectPool(this._ballPrefab, 10, true, Ball);
        this._FloatingScorePool = new ObjectPool(this._floatingScoreText, 10, true);
    }

    protected start(): void {
        this.changeGameState(GameState.Init);
    }

    protected update(dt: number): void {
        if (this._gameState != GameState.Playing) return;
        this._timer -= dt;
        if (this._timer <= 0) {
            this._timer = 0;
            this.gameOver();
        }

        EventManger.instance.emit(GameEvent.TimeUpdate, this._timer);
    }

    private changeGameState(state: GameState) {
        this._gameState = state;
        EventManger.instance.emit(GameEvent.GameStateChange, this._gameState);
    }

    private addScore(score: number, type: ScoreType, position: Vec3) {
        this._score += score;
        const floatingScore = this._FloatingScorePool.get(this._floatingTextContainer, FloatingText);
        floatingScore.show(`+${score}`, position, score >= 100 ? 1.5 : 1, score >= 100 ? 1 : 0.7);
        EventManger.instance.emit(GameEvent.Score, [this._score, type]);
    }

    private setCurrentBallInGame(value: number) {
        this._currentBallInGame += value;
        if (this._currentBallInGame >= 2) {
            if (!this._isMultiBall) {
                this._isMultiBall = true;
                EventManger.instance.emit(GameEvent.MultiBall, true);
            }
        }

        if (this._currentBallInGame <= 0) {
            if (this._isMultiBall) {
                this._isMultiBall = false;
                EventManger.instance.emit(GameEvent.MultiBall, false);
            }
        }
    }

    public spawnBall(throwBall: boolean): Ball {
        if (this._gameState != GameState.Playing) return;
        SoundManager.instance.playSfx(this._startSound);
        this.setCurrentBallInGame(1);
        const ball = this._ballPool.get(this.node, Ball);
        ball.node.setPosition(this._ballSpawnPosition);
        if (!throwBall) return ball;
        let dir = randomRangeInt(-1, 2);
        while (dir == 0) {
            dir = randomRangeInt(-1, 2);
        }
        const force = new Vec2(dir, 1);
        ball.throwBall(force.multiply2f(1, 40));
        return ball;
    }

    public async ballOut() {
        this.setCurrentBallInGame(-1);
        if (this._currentBallInGame <= 0) {
            EventManger.instance.emit(GameEvent.BallOut, null);
            await Utilities.delay(TimeConfig.DelayPLay);
            this.spawnBall(true);
        }
    }

    public async goal(bonusScore: number, position: Vec3) {
        this.addScore(this._isMultiBall ? bonusScore * 2 : bonusScore, ScoreType.Goal, position);
        this.setCurrentBallInGame(-1);
        if (this._currentBallInGame <= 0) {
            await Utilities.delay(TimeConfig.DelayGoal);
            this.spawnBall(true);
        }
    }

    public async destroyEnvironmentObject(bonusScore: number, position: Vec3, bonusTime?: number) {
        if (bonusScore) {
            this.addScore(bonusScore, ScoreType.DestroyObject, position);
            await Utilities.delay(0.3);
        }
        if (bonusTime) {
            this.addTime(bonusTime);
            const floatingScore = this._FloatingScorePool.get(this._floatingTextContainer, FloatingText);
            floatingScore.show(`+${bonusTime}⏰`, position, 0.7);
        }
    }

    public addTime(time: number) {
        this._timer += time;
    }

    private gameOver() {
        this._ballPool.releaseAll();
        this.changeGameState(GameState.GameOver);
    }

    public async play() {
        this._timer = this._timePlay + TimeConfig.DelayPLay;
        this._score = 0;
        this._currentBallInGame = 0;
        this._isMultiBall = false;
        SoundManager.instance.playBGM(this._backgroundMusic, 0.5);
        this.changeGameState(GameState.Playing);
        await Utilities.delay(TimeConfig.DelayPLay);
        this.spawnBall(true);
    }

    public onRevive() {
        throw new Error('Method not implemented.');
    }
}