using UnityEngine;
using UnityEngine.Events;

namespace Pink.Mechanics
{
	public class CharacterKinematics : MonoBehaviour
	{
		[SerializeField] private float m_JumpForce = 400f;                          // Amount of force added when the player jumps.
		[SerializeField] private float m_DoubleJumpForce = 13f;                    // Amount of force added when the player double jumps.
																					//[Range(0, 1)] [SerializeField] private float m_CrouchSpeed = .36f;          // Amount of maxSpeed applied to crouching movement. 1 = 100%
		[Range(0, .3f)] [SerializeField] private float m_MovementSmoothing = .05f;  // How much to smooth out the movement
		[SerializeField] private bool m_AirControl = false;                         // Whether or not a player can steer while jumping;
		[SerializeField] private LayerMask m_WhatIsGround;                          // A mask determining what is ground to the character
		[SerializeField] private Transform m_GroundCheck;                           // A position marking where to check if the player is grounded.
		[SerializeField] private Transform m_CeilingCheck;                          // A position marking where to check for ceilings
		[SerializeField] private Collider2D m_CrouchDisableCollider;                // A collider that will be disabled when crouching

		public Animator animator;

		const float k_GroundedRadius = .2f; // Radius of the overlap circle to determine if grounded
		private bool m_Grounded;            // Whether or not the player is grounded.
		const float k_CeilingRadius = .2f; // Radius of the overlap circle to determine if the player can stand up
		private Rigidbody2D m_Rigidbody2D;
		private bool m_FacingRight = true;  // For determining which way the player is currently facing.
		private Vector3 m_Velocity = Vector3.zero;
		private bool m_hasDoubleJumped = false;

		[Header("Events")]
		[Space]

		public UnityEvent OnLandEvent;

		[System.Serializable]
		public class BoolEvent : UnityEvent<bool> { }

		private void Awake()
		{
			m_Rigidbody2D = GetComponent<Rigidbody2D>();

			if (OnLandEvent == null)
				OnLandEvent = new UnityEvent();
		}

		private void FixedUpdate()
		{
			bool wasGrounded = m_Grounded;
			m_Grounded = false;

			// The player is grounded if a circlecast to the groundcheck position hits anything designated as ground
			// This can be done using layers instead but Sample Assets will not overwrite your project settings.
			Collider2D[] colliders = Physics2D.OverlapCircleAll(m_GroundCheck.position, k_GroundedRadius, m_WhatIsGround);
			for (int i = 0; i < colliders.Length; i++)
			{
				if (colliders[i].gameObject != gameObject)
				{
					m_Grounded = true;
					if (!wasGrounded)
					{
						m_hasDoubleJumped = false;
						OnLandEvent.Invoke();
					}
				}
			}
		}

		public void Move(float move, bool crouch, bool jump)
		{
			//only control the player if grounded or airControl is turned on
			if (m_Grounded || m_AirControl)
			{
				// Move the character by finding the target velocity
				Vector3 targetVelocity = new Vector2(move * 10f, m_Rigidbody2D.velocity.y);
				// And then smoothing it out and applying it to the character
				m_Rigidbody2D.velocity = Vector3.SmoothDamp(m_Rigidbody2D.velocity, targetVelocity, ref m_Velocity, m_MovementSmoothing);

				// If the input is moving the player right and the player is facing left...
				if (move > 0 && !m_FacingRight)
				{
					// ... flip the player.
					Flip();
				}
				// Otherwise if the input is moving the player left and the player is facing right...
				else if (move < 0 && m_FacingRight)
				{
					// ... flip the player.
					Flip();
				}
			}
			// If the player should jump...
			if (m_Grounded && jump)
			{
				// Add a vertical force to the player.
				m_Grounded = false;
				m_hasDoubleJumped = false;
				m_Rigidbody2D.AddForce(new Vector2(0f, m_JumpForce));
			}
			else if (!m_Grounded && jump && !m_hasDoubleJumped)
			{
				m_hasDoubleJumped = true;

                //Vector3 targetVelocity = new Vector2(move * 10f, m_DoubleJumpForce);
                m_Rigidbody2D.velocity = new Vector2(move * 10f, m_DoubleJumpForce);
                // And then smoothing it out and applying it to the character
                //m_Rigidbody2D.velocity = Vector3.SmoothDamp(m_Rigidbody2D.velocity, targetVelocity, ref m_Velocity, m_MovementSmoothing);
                //m_Rigidbody2D.AddForce(new Vector2(0f, m_DoubleJumpForce));
                animator.SetTrigger("doubleJump");
			}

			animator.SetBool("grounded", m_Grounded);
			animator.SetFloat("velocityX", Mathf.Abs(m_Rigidbody2D.velocity.x));
			animator.SetFloat("velocityY", m_Rigidbody2D.velocity.y);
		}

		public void Teleport(Vector3 position)
        {
            m_Rigidbody2D.position = position;
            m_Velocity *= 0;
            m_Rigidbody2D.velocity *= 0;
        }

		public void Bounce()
		{
			Bounce(0.8f);
		}

		public void Bounce(float multiplier)
		{
			m_Rigidbody2D.velocity *= multiplier * -1;
		}

		private void Flip()
		{
			// Switch the way the player is labelled as facing.
			m_FacingRight = !m_FacingRight;

			// Multiply the player's x local scale by -1.
			Vector3 theScale = transform.localScale;
			theScale.x *= -1;
			transform.localScale = theScale;
		}
	}
}