class GameState {
    constructor() {
        this.reset();
        this.eventListeners = {};
    }

    reset() {
        this.period = 1;
        this.timeRemaining = 20 * 60; // 20 minutes in seconds
        this.homeScore = 0;
        this.awayScore = 0;
        this.gameSpeed = 1;
        this.isPaused = false;
        this.gameOver = false;

        this.stats = {
            home: {
                shots: 0,
                saves: 0,
                hits: 0,
                faceoffWins: 0
            },
            away: {
                shots: 0,
                saves: 0,
                hits: 0,
                faceoffWins: 0
            }
        };

        this.gameEvents = [];
        this.lastEventTime = 0;

        this.rink = {
            width: 1000,
            height: 600,
            centerX: 500,
            centerY: 300,
            goalWidth: 120,
            goalHeight: 40,
            corners: {
                radius: 80
            },
            faceoffDots: [
                { x: 200, y: 150 }, // Home left
                { x: 200, y: 450 }, // Home right
                { x: 500, y: 300 }, // Center
                { x: 800, y: 150 }, // Away left
                { x: 800, y: 450 }  // Away right
            ]
        };


        this.faceoff = {
            isActive: false,
            phase: 'none', // 'setup', 'ready', 'drop', 'complete'
            timeRemaining: 0,
            location: { x: 500, y: 300 }, // Center ice by default
            participants: { home: null, away: null }
        };
    }

    formatTime(seconds) {
        const minutes = Math.floor(seconds / 60);
        const remainingSeconds = Math.floor(seconds % 60);
        return `${minutes}:${remainingSeconds.toString().padStart(2, '0')}`;
    }

    getPeriodName() {
        switch (this.period) {
            case 1: return '1st';
            case 2: return '2nd';
            case 3: return '3rd';
            default: return 'OT';
        }
    }

    updateTime(deltaTime) {
        if (this.isPaused || this.gameOver) return;

        this.timeRemaining -= deltaTime * this.gameSpeed;

        if (this.timeRemaining <= 0) {
            this.timeRemaining = 0;
            this.endPeriod();
        }

    }

    endPeriod() {
        this.period++;
        if (this.period > 3 && this.homeScore !== this.awayScore) {
            this.gameOver = true;
            this.emit('game-end', { winner: this.homeScore > this.awayScore ? 'home' : 'away' });
        } else if (this.period <= 3) {
            this.timeRemaining = 20 * 60;
            this.emit('period-end', { period: this.period - 1 });
        } else {
            this.timeRemaining = 5 * 60; // Overtime
            this.emit('overtime-start');
        }
    }

    addGoal(team) {
        if (team === 'home') {
            this.homeScore++;
        } else {
            this.awayScore++;
        }
        this.addEvent(`GOAL - ${team.toUpperCase()}!`);
        this.emit('goal', { team, homeScore: this.homeScore, awayScore: this.awayScore });
    }

    addShot(team) {
        this.stats[team].shots++;
        this.emit('shot', { team, shots: this.stats[team].shots });
    }

    addSave(team) {
        this.stats[team].saves++;
        this.emit('save', { team, saves: this.stats[team].saves });
    }



    addEvent(description) {
        const event = {
            time: this.formatTime(20 * 60 - this.timeRemaining),
            period: this.period,
            description,
            timestamp: Date.now()
        };
        this.gameEvents.unshift(event);
        if (this.gameEvents.length > 50) {
            this.gameEvents.pop();
        }
    }

    togglePause() {
        this.isPaused = !this.isPaused;
        this.emit('pause-toggle', { isPaused: this.isPaused });
    }

    setSpeed(speed) {
        this.gameSpeed = Math.max(0.1, Math.min(5, speed));
        this.emit('speed-change', { speed: this.gameSpeed });
    }

    on(event, callback) {
        if (!this.eventListeners[event]) {
            this.eventListeners[event] = [];
        }
        this.eventListeners[event].push(callback);
    }

    emit(event, data) {
        if (this.eventListeners[event]) {
            this.eventListeners[event].forEach(callback => callback(data));
        }
    }

    startFaceoff(location = { x: 500, y: 300 }) {
        console.log('Starting faceoff at location:', location);
        this.faceoff = {
            isActive: true,
            phase: 'setup',
            timeRemaining: 3.0, // 3 seconds for setup
            location: location,
            participants: { home: null, away: null }
        };
        this.emit('faceoff-start', { location });
    }

    updateFaceoff(deltaTime) {
        if (!this.faceoff.isActive) return;

        this.faceoff.timeRemaining -= deltaTime;

        if (this.faceoff.timeRemaining <= 0) {
            switch (this.faceoff.phase) {
                case 'setup':
                    this.faceoff.phase = 'ready';
                    this.faceoff.timeRemaining = 2.0; // 2 seconds ready phase
                    this.emit('faceoff-ready');
                    break;
                case 'ready':
                    this.faceoff.phase = 'drop';
                    this.faceoff.timeRemaining = 0.5; // Brief drop phase
                    this.emit('faceoff-drop');
                    break;
                case 'drop':
                    this.completeFaceoff();
                    break;
            }
        }
    }

    completeFaceoff() {
        this.faceoff.isActive = false;
        this.faceoff.phase = 'complete';
        this.emit('faceoff-complete', {
            winner: this.determineFaceoffWinner(),
            location: this.faceoff.location
        });
    }

    determineFaceoffWinner() {
        const { home, away } = this.faceoff.participants;
        if (!home || !away) return 'home'; // Default fallback

        // Simple skill-based determination with some randomness
        const homeSkill = home.attributes.puckHandling + home.attributes.awareness;
        const awaySkill = away.attributes.puckHandling + away.attributes.awareness;

        const homeProbability = homeSkill / (homeSkill + awaySkill);
        const winner = Math.random() < homeProbability ? 'home' : 'away';

        this.stats[winner].faceoffWins++;
        return winner;
    }

    getGameState() {
        return {
            period: this.period,
            timeRemaining: this.timeRemaining,
            homeScore: this.homeScore,
            awayScore: this.awayScore,
            stats: { ...this.stats },
            isPaused: this.isPaused,
            gameSpeed: this.gameSpeed,
            gameOver: this.gameOver,
            faceoff: { ...this.faceoff }
        };
    }
}