class RulesSystem {
    constructor(gameState) {
        this.gameState = gameState;
        this.lastOffsideCheck = 0;
        this.lastIcingCheck = 0;
    }

    update(players, puck, deltaTime) {
        this.checkOffside(players, puck);
        this.checkIcing(players, puck);
    }

    checkOffside(players, puck) {
        const currentTime = Date.now();
        if (currentTime - this.lastOffsideCheck < 500) return;

        const puckOwner = players.find(p => p.state.hasPuck);
        if (!puckOwner) return;

        const centerLine = this.gameState.rink.centerX;
        const offensiveZoneLine = puckOwner.team === 'home' ?
            this.gameState.rink.width * 0.67 : this.gameState.rink.width * 0.33;

        const puckInOffensiveZone = puckOwner.team === 'home' ?
            puck.position.x > offensiveZoneLine :
            puck.position.x < offensiveZoneLine;

        if (puckInOffensiveZone) {
            const teammates = players.filter(p =>
                p.team === puckOwner.team &&
                p.id !== puckOwner.id &&
                p.role !== 'G'
            );

            const offsidePlayers = teammates.filter(teammate => {
                const isAhead = puckOwner.team === 'home' ?
                    teammate.position.x > puck.position.x :
                    teammate.position.x < puck.position.x;

                const inOffensiveZone = puckOwner.team === 'home' ?
                    teammate.position.x > offensiveZoneLine :
                    teammate.position.x < offensiveZoneLine;

                return isAhead && inOffensiveZone;
            });

            if (offsidePlayers.length > 0) {
                this.callOffside(puckOwner.team, offsidePlayers);
                this.lastOffsideCheck = currentTime;
            }
        }
    }

    callOffside(team, players) {
        this.gameState.addEvent(`OFFSIDE - ${team.toUpperCase()}`);

        const faceoffPosition = this.gameState.rink.faceoffDots[
            team === 'home' ? 1 : 3
        ];

        this.gameState.emit('offside', {
            team,
            players: players.map(p => p.name),
            faceoffPosition
        });

        this.scheduleFaceoff(faceoffPosition);
    }

    checkIcing(players, puck) {
        const currentTime = Date.now();
        if (currentTime - this.lastIcingCheck < 1000) return;

        if (!puck.lastTeamTouch) return;

        const shootingTeam = puck.lastTeamTouch;
        const shootingZoneLine = shootingTeam === 'home' ?
            this.gameState.rink.width * 0.33 : this.gameState.rink.width * 0.67;

        const puckCrossedOwnZone = shootingTeam === 'home' ?
            puck.position.x < shootingZoneLine :
            puck.position.x > shootingZoneLine;

        if (!puckCrossedOwnZone) return;

        const goalLine = shootingTeam === 'home' ?
            this.gameState.rink.width - 50 : 50;

        const puckPastGoalLine = shootingTeam === 'home' ?
            puck.position.x > goalLine :
            puck.position.x < goalLine;

        if (puckPastGoalLine) {
            const shootingPlayers = players.filter(p => p.team === shootingTeam);
            const opposingPlayers = players.filter(p => p.team !== shootingTeam);

            const nearestShootingPlayer = this.findNearestPlayer(puck.position, shootingPlayers);
            const nearestOpposingPlayer = this.findNearestPlayer(puck.position, opposingPlayers);

            if (nearestOpposingPlayer &&
                nearestOpposingPlayer.position.distance(puck.position) <
                nearestShootingPlayer.position.distance(puck.position)) {

                this.callIcing(shootingTeam);
                this.lastIcingCheck = currentTime;
            }
        }
    }

    callIcing(team) {
        this.gameState.addEvent(`ICING - ${team.toUpperCase()}`);

        const faceoffPosition = this.gameState.rink.faceoffDots[
            team === 'home' ? 0 : 4
        ];

        this.gameState.emit('icing', {
            team,
            faceoffPosition
        });

        this.scheduleFaceoff(faceoffPosition);
    }


    scheduleFaceoff(position) {
        setTimeout(() => {
            this.gameState.emit('faceoff', { position });
        }, 2000);
    }

    findNearestPlayer(position, players) {
        let nearest = null;
        let minDistance = Infinity;

        players.forEach(player => {
            const distance = player.position.distance(position);
            if (distance < minDistance) {
                minDistance = distance;
                nearest = player;
            }
        });

        return nearest;
    }

    reset() {
        this.lastOffsideCheck = 0;
        this.lastIcingCheck = 0;
    }
}