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

public class UnitychanSpriteAction : MonoBehaviour
{
	static int hashSpeed = Animator.StringToHash ("Speed");
	static int hashFallSpeed = Animator.StringToHash ("FallSpeed");
	static int hashGroundDistance = Animator.StringToHash ("GroundDistance");
	static int hashIsCrouch = Animator.StringToHash ("IsCrouch");
	static int hashAttack1 = Animator.StringToHash ("Attack1");
	static int hashAttack2 = Animator.StringToHash ("Attack2");
	static int hashAttack3 = Animator.StringToHash ("Attack3");


	static int hashDamage = Animator.StringToHash ("Damage");
	static int hashIsDead = Animator.StringToHash ("IsDead");

	[SerializeField] private float characterHeightOffset = 0.2f;
	[SerializeField] LayerMask groundMask;

	[SerializeField, HideInInspector] Animator animator;
	[SerializeField, HideInInspector]SpriteRenderer spriteRenderer;
	[SerializeField, HideInInspector]Rigidbody2D rig2d;

	public int hp = 4;

	public Rigidbody2D Rig2d { get => rig2d; set => rig2d = value; }

	[SerializeField]
	private List<RuntimeAnimatorController> animatorControllerList = new List<RuntimeAnimatorController>();

	static int hashStateWarmingup = Animator.StringToHash("Warming.WarmingUp");

	void Awake ()
	{
		animator = GetComponent<Animator> ();
		spriteRenderer = GetComponent<SpriteRenderer> ();
		Rig2d = GetComponent<Rigidbody2D> ();
	}

	void Update ()
	{
		float axis = Input.GetAxisRaw ("Horizontal");
		bool isDown = Input.GetAxisRaw ("Vertical") < 0;

		if (Input.GetButtonDown ("Jump")) {
			Rig2d.velocity = new Vector2 (Rig2d.velocity.x, 5);
		}

		var distanceFromGround = Physics2D.Raycast (transform.position, Vector3.down, 1, groundMask);

		// update animator parameters
		animator.SetBool (hashIsCrouch, isDown);
		animator.SetFloat (hashGroundDistance, distanceFromGround.distance == 0 ? 99 : distanceFromGround.distance - characterHeightOffset);
		animator.SetFloat (hashFallSpeed, Rig2d.velocity.y);
		animator.SetFloat (hashSpeed, Mathf.Abs (axis));
		if( Input.GetKeyDown(KeyCode.Z) ){  animator.SetTrigger(hashAttack1); }
		if( Input.GetKeyDown(KeyCode.X) ){  animator.SetTrigger(hashAttack2); }
		if( Input.GetKeyDown(KeyCode.C) ){  animator.SetTrigger(hashAttack3); }

		// change attack mode
		if( Input.GetKeyDown(KeyCode.M) )
		{
			// unavailable during an attack
			if(animator.GetHashCode() == hashAttack1 ||
			animator.GetHashCode() == hashAttack2 ||
			animator.GetHashCode() == hashAttack3)
			{
				return;
			}

			// change attack mode animation
			animator.Play(hashStateWarmingup);

			// set attack mode
			if(animator.runtimeAnimatorController.Equals(animatorControllerList[0]))
			{
				animator.runtimeAnimatorController = animatorControllerList[1];
			}
			else
			{
				animator.runtimeAnimatorController = animatorControllerList[0];
			}
		}

		// flip sprite
		if (axis != 0) spriteRenderer.flipX = axis < 0;
	}
}