/**
 * GAMEPAD CONTROLLER SYSTEM
 * Xbox/PlayStation controller support with haptic feedback
 */

class GamepadController {
    constructor(scene) {
        this.scene = scene;
        this.gamepad = null;
        this.deadzone = 0.15;

        // Button mappings (Xbox layout)
        this.buttons = {
            A: 0,           // Interact
            B: 1,           // Menu
            X: 2,           // Gronk Vape Shield
            Y: 3,           // Whistle to Susi
            LB: 4,
            RB: 5,
            LT: 6,
            RT: 7,
            SELECT: 8,
            START: 9,
            L_STICK: 10,
            R_STICK: 11,
            DPAD_UP: 12,
            DPAD_DOWN: 13,
            DPAD_LEFT: 14,
            DPAD_RIGHT: 15
        };

        this.lastVibration = 0;
        this.init();
    }

    init() {
        // Check for gamepad connection
        window.addEventListener('gamepadconnected', (e) => {
            console.log('🎮 Gamepad connected:', e.gamepad.id);
            this.gamepad = e.gamepad;
            this.scene.events.emit('gamepad-connected', e.gamepad);
        });

        window.addEventListener('gamepaddisconnected', (e) => {
            console.log('🎮 Gamepad disconnected');
            this.gamepad = null;
            this.scene.events.emit('gamepad-disconnected');
        });
    }

    update() {
        // Refresh gamepad state
        const gamepads = navigator.getGamepads();
        this.gamepad = gamepads[0] || gamepads[1] || gamepads[2] || gamepads[3];

        if (!this.gamepad) return null;

        return {
            leftStick: this.getLeftStick(),
            rightStick: this.getRightStick(),
            buttons: this.getButtons()
        };
    }

    getLeftStick() {
        if (!this.gamepad) return { x: 0, y: 0 };

        let x = this.gamepad.axes[0];
        let y = this.gamepad.axes[1];

        // Apply deadzone
        if (Math.abs(x) < this.deadzone) x = 0;
        if (Math.abs(y) < this.deadzone) y = 0;

        return { x, y };
    }

    getRightStick() {
        if (!this.gamepad) return { x: 0, y: 0 };

        let x = this.gamepad.axes[2];
        let y = this.gamepad.axes[3];

        // Apply deadzone
        if (Math.abs(x) < this.deadzone) x = 0;
        if (Math.abs(y) < this.deadzone) y = 0;

        return { x, y };
    }

    getButtons() {
        if (!this.gamepad) return {};

        const pressed = {};
        Object.keys(this.buttons).forEach(key => {
            const index = this.buttons[key];
            pressed[key] = this.gamepad.buttons[index]?.pressed || false;
        });

        return pressed;
    }

    isButtonPressed(buttonName) {
        if (!this.gamepad) return false;
        const index = this.buttons[buttonName];
        return this.gamepad.buttons[index]?.pressed || false;
    }

    isButtonJustPressed(buttonName) {
        // Track button state changes for single press detection
        if (!this.gamepad) return false;

        const index = this.buttons[buttonName];
        const pressed = this.gamepad.buttons[index]?.pressed || false;

        if (!this.lastButtonState) this.lastButtonState = {};
        const wasPressed = this.lastButtonState[buttonName] || false;
        this.lastButtonState[buttonName] = pressed;

        return pressed && !wasPressed;
    }

    /**
     * HAPTIC FEEDBACK (Rumble)
     * intensity: 0.0 - 1.0
     * duration: milliseconds
     */
    vibrate(intensity = 0.5, duration = 200) {
        if (!this.gamepad || !this.gamepad.vibrationActuator) return;

        // Prevent spam
        const now = Date.now();
        if (now - this.lastVibration < 100) return;
        this.lastVibration = now;

        try {
            this.gamepad.vibrationActuator.playEffect('dual-rumble', {
                startDelay: 0,
                duration: duration,
                weakMagnitude: intensity * 0.5,
                strongMagnitude: intensity
            });
        } catch (e) {
            console.warn('Vibration not supported:', e);
        }
    }

    /**
     * COLLISION RUMBLE
     * Light vibration for hitting obstacles
     */
    collisionRumble() {
        this.vibrate(0.3, 150);
    }

    /**
     * ZOMBIE ENCOUNTER RUMBLE
     * Heavy vibration for enemy appearance
     */
    zombieRumble() {
        this.vibrate(0.8, 300);
    }

    /**
     * VAPE SHIELD RUMBLE
     * Medium pulse for Gronk's ability
     */
    vapeShieldRumble() {
        this.vibrate(0.5, 200);
    }

    destroy() {
        window.removeEventListener('gamepadconnected', this.init);
        window.removeEventListener('gamepaddisconnected', this.init);
    }
}

export default GamepadController;