import * as THREE from 'three';
import { PointerLockControls } from 'three/examples/jsm/controls/PointerLockControls.js';

export class Player {
    constructor(camera, colliders) {
        this.camera = camera;
        this.colliders = colliders;

        // Player stats
        this.speed = 5.0;
        this.height = 1.7; // Eyes height

        // Init controls
        this.controls = new PointerLockControls(camera, document.body);

        // Movement state
        this.moveForward = false;
        this.moveBackward = false;
        this.moveLeft = false;
        this.moveRight = false;
        this.velocity = new THREE.Vector3();
        this.direction = new THREE.Vector3();
        this.flashlightOn = true; // Started as ON

        this.setupInput();
        this.setupFlashlight();
    }

    setupFlashlight() {
        this.flashlight = new THREE.SpotLight(0xffffff, 10);
        this.flashlight.angle = Math.PI / 6;
        this.flashlight.penumbra = 0.3;
        this.flashlight.decay = 2;
        this.flashlight.distance = 15;

        this.camera.add(this.flashlight);
        this.flashlight.position.set(0, 0, 0);
        this.flashlight.target.position.set(0, 0, -1);
        this.camera.add(this.flashlight.target);
    }

    setupInput() {
        const onKeyDown = (event) => {
            switch (event.code) {
                case 'KeyW': this.moveForward = true; break;
                case 'KeyA': this.moveLeft = true; break;
                case 'KeyS': this.moveBackward = true; break;
                case 'KeyD': this.moveRight = true; break;
                case 'KeyF': this.toggleFlashlight(); break;
            }
        };

        const onKeyUp = (event) => {
            switch (event.code) {
                case 'KeyW': this.moveForward = false; break;
                case 'KeyA': this.moveLeft = false; break;
                case 'KeyS': this.moveBackward = false; break;
                case 'KeyD': this.moveRight = false; break;
            }
        };

        document.addEventListener('keydown', onKeyDown);
        document.addEventListener('keyup', onKeyUp);
    }

    toggleFlashlight() {
        if (!this.controls.isLocked) return; // Only toggle when game is active
        this.flashlightOn = !this.flashlightOn;
        if (this.flashlight) {
            this.flashlight.visible = this.flashlightOn;
        }
    }

    lockControls() {
        this.controls.lock();
    }

    getObject() {
        return this.controls.getObject();
    }

    update(dt) {
        if (!this.controls.isLocked) return;

        // Friction-like dampening
        // Simple direct velocity for now
        this.velocity.x = 0;
        this.velocity.z = 0;

        this.direction.z = Number(this.moveForward) - Number(this.moveBackward);
        this.direction.x = Number(this.moveRight) - Number(this.moveLeft);
        this.direction.normalize(); // Ensure consistent speed in all directions

        if (this.moveForward || this.moveBackward) this.velocity.z -= this.direction.z * this.speed * dt;
        if (this.moveLeft || this.moveRight) this.velocity.x -= this.direction.x * this.speed * dt;

        // Apply movement
        this.controls.moveRight(-this.velocity.x);
        this.controls.moveForward(-this.velocity.z);

        // Simple Collision: Push back
        const playerPos = this.controls.getObject().position;
        const playerRadius = 0.5; // approximated radius

        for (const collider of this.colliders) {
            // Assume colliders are BoxGeometry meshes aligned with axes for now
            const box = new THREE.Box3().setFromObject(collider);

            // Check if player is inside the box (expanded by radius)
            // We only check X/Z for walls
            if (playerPos.x > box.min.x - playerRadius && playerPos.x < box.max.x + playerRadius &&
                playerPos.z > box.min.z - playerRadius && playerPos.z < box.max.z + playerRadius) {

                // Very simple resolution: determine closest edge and push out
                // This is a naive implementation but works for static orthogonal walls
                const dx1 = Math.abs(playerPos.x - (box.min.x - playerRadius));
                const dx2 = Math.abs(playerPos.x - (box.max.x + playerRadius));
                const dz1 = Math.abs(playerPos.z - (box.min.z - playerRadius));
                const dz2 = Math.abs(playerPos.z - (box.max.z + playerRadius));

                const minOverlap = Math.min(dx1, dx2, dz1, dz2);

                if (minOverlap === dx1) playerPos.x = box.min.x - playerRadius;
                else if (minOverlap === dx2) playerPos.x = box.max.x + playerRadius;
                else if (minOverlap === dz1) playerPos.z = box.min.z - playerRadius;
                else if (minOverlap === dz2) playerPos.z = box.max.z + playerRadius;
            }
        }

        // Keep player on ground
        playerPos.y = this.height;

        // Flashlight flicker effect (subtle)
        if (this.flashlight && this.flashlightOn) {
            this.flashlight.intensity = 10 + Math.random() * 0.5;
        }
    }
}