import * as THREE from 'three';
import * as MathUtils from 'three/src/math/MathUtils.js';

const PLAYER_SPEED = 0.015;
const ROTATION_SPEED = 0.05; // Vitesse de rotation
const playerDirection = new THREE.Vector3(0, 0, 0);
const playerRotation = new THREE.Quaternion();

//Managing keys
export function handleKeyDown(event) {
    switch (event.code) {
      case 'ArrowUp':
      case 'KeyW':
        playerDirection.y = 1; // Up
        break;
      case 'ArrowDown':
      case 'KeyS':
        playerDirection.y = -1; // Back
        break;
      case 'ArrowLeft':
      case 'KeyA':
        playerDirection.x = -1; // Left
        break;
      case 'ArrowRight':
      case 'KeyD':
        playerDirection.x = 1; // Right
        break;
    }
  }
  
  export function handleKeyUp(event) {
    switch (event.code) {
      case 'ArrowUp':
      case 'KeyW':
      case 'ArrowDown':
      case 'KeyS':
        playerDirection.y = 0; // Arrêter le mouvement vertical
        break;
      case 'ArrowLeft':
      case 'KeyA':
      case 'ArrowRight':
      case 'KeyD':
        playerDirection.x = 0; // Arrêter le mouvement horizontal
        break;
    }
  }

  export function updatePlayerPositionAnimation(player, camera, scene) {
    /* Function called in the main loop
        Used to calculate the position and orientation of the player
        Also used to start and stop walking animation 
        Takes player, camera and scene*/

    //COLLIDERS
    const raycaster = new THREE.Raycaster();//Creating a raycaster from the player
    const rayDirection = new THREE.Vector3(playerDirection.x, playerDirection.y, 0).normalize();
    raycaster.set(player.scene.position, rayDirection);

    const intersects = raycaster.intersectObjects(scene.children, true);//Gettings objects on the path of this raycaster

    const allowedDistance = 0.4;
    const collisionThreshold = 0.2;
    for(let i=0; i<intersects.length; i++){
      if(intersects[i].distance>collisionThreshold && intersects[i].distance<allowedDistance){
        //Valid colliding object, not too close ( player leg / arm ), but not too far
        playerDirection.set(0, 0, 0);
        break;
      }
    }

    //MOVING
    const delta = playerDirection.clone().multiplyScalar(PLAYER_SPEED);
    player.scene.position.add(delta);
    camera.position.add(delta);//The camera must follow the player

    //ANIMATING
    if (playerDirection.length() > 0) {//If a movement key is pressed ( or something in playerDirection )
        if(!player.animationActions.Walk.isRunning()) player.animationActions.Walk.play();//Playing walk animation

        const angle = Math.atan2(playerDirection.x, -playerDirection.y);//Get the angle between center (0;0) and the coordinates, which are directly provided by the pressed keys
        const targetRotation = new THREE.Quaternion();
        
        targetRotation.setFromAxisAngle(new THREE.Vector3(0, 1, 0), angle);
        playerRotation.slerp(targetRotation, ROTATION_SPEED);//Slowly moving from playerRotation to targetRotation
        player.scene.setRotationFromQuaternion(playerRotation);
        player.scene.rotateOnWorldAxis(new THREE.Vector3(1, 0, 0), MathUtils.degToRad(90));//Used to force the player to be standing up instead of sleeping
    }else{
        if(player.animationActions.Walk.isRunning()) player.animationActions.Walk.stop();//Not walking, we can stop this animation
    }
  }