using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerController : MonoBehaviour
{
    public float walkSpeed = 7.5f;
    public float runningSpeed = 7.5f;
    public float jumpSpeed = 7.5f;
    public float lookSpeed = 7.5f;
    public float lookXLimit = 7.5f;
    public Camera playerCamera;
    Vector3 moveDirection = Vector3.zero;
    CharacterController characterController;
    public float rotationX = 0;
    // Start is called before the first frame update
    [HideInInspector]
    bool canMove = true;
    Rigidbody rb;

    private GameObject collisionGameObject = null;

    float moveDirectionY;

    public Vector3 jump;
    public float jumpForce = 2.0f;

    void Start()
    {
        rb = GetComponent<Rigidbody>();
        characterController = GetComponent<CharacterController>();
        Cursor.lockState = CursorLockMode.Locked;
        Cursor.visible = false;
        jump = new Vector3(0.0f, 2.0f, 0.0f);
    }

    // Update is called once per frame
    void Update()
    {
        rotationX += -Input.GetAxis("Mouse Y") * lookSpeed;
        rotationX = Mathf.Clamp(rotationX, -lookXLimit, lookXLimit);
        playerCamera.transform.localRotation = Quaternion.Euler(rotationX, 0, 0);
        transform.rotation *= Quaternion.Euler(0, Input.GetAxis("Mouse X") * lookSpeed, 0);

        bool isRunning = Input.GetKey(KeyCode.LeftShift);
        float curSpeedX = canMove ? (isRunning ? runningSpeed : walkSpeed) * Input.GetAxis("Vertical") : 0;
        float curSpeedY = canMove ? (isRunning ? runningSpeed : walkSpeed) * Input.GetAxis("Horizontal") : 0;

        moveDirection = (transform.forward * curSpeedX * Time.deltaTime) + (transform.right * curSpeedY * Time.deltaTime);

        if (Input.GetKeyDown(KeyCode.Space))
        {
            Debug.Log("Jump");
            rb.AddForce(transform.up * jumpSpeed * 500 * Time.deltaTime, ForceMode.Impulse);
        }
        if(this.collisionGameObject != null){
            transform.rotation = Quaternion.Slerp(transform.rotation, this.collisionGameObject.transform.rotation, Time.deltaTime * 1.0f);
        }

        rb.MovePosition(rb.position + moveDirection);

        //characterController.Move(moveDirection * Time.deltaTime);
    }

    void OnCollisionExit(Collision other) {
        if (other.gameObject.tag == "platform")
        {
            this.collisionGameObject = null;
        }
    }
    void OnCollisionEnter(Collision other)
    {
        if (other.gameObject.tag == "platform")
        {
            // FIXME:
            var thisTransform = this.gameObject.transform;
            // thisTransform.eulerAngles = new Vector3(thisTransform.eulerAngles.x, thisTransform.eulerAngles.y, collision.transform.eulerAngles.z);
            // thisTransform.rotation = new Quaternion(thisTransform.rotation.x, thisTransform.rotation.y, thisTransform.rotation.z, 1.0f) * Vector3.forward;
            this.collisionGameObject = other.gameObject;
            Vector3 gDirection = new Quaternion(0.0f, 0.0f, other.gameObject.transform.rotation.z, 1.0f) * Vector3.down;

            Physics.gravity = gDirection * 9.81f;
            Debug.Log(Physics.gravity);
            //Physics.gravity = -Physics.gravity;
        }
    }
}