using System.Linq;
using UnityEngine;
using System.Collections;

public class AiCanHitEnemy : AiBehavior {

    private GameObject obj;
    private Inventory inventory;
    private HumanController selfController;
    public LayerMask skipRaycast;

    protected override BehaviorStatus OnExecute(AiBlackboard blackboard) {
        if (obj == null) {
            blackboard.GetValue<GameObject>("gameobject", out obj);
            inventory = obj.GetComponent<Inventory>();
            selfController = obj.GetComponent<HumanController>();
        }

        PlayerController enemy;
        blackboard.GetValue("enemy", out enemy);
        if (enemy == null) {
            
            return BehaviorStatus.Fail;
        }

        Vector3 right = obj.transform.localToWorldMatrix.MultiplyVector(Vector3.right).normalized;
        var raycastDir = Mathf.Abs(enemy.transform.position.x - obj.transform.position.x) * right;

        var p0 = obj.transform.position + Vector3.up * selfController.ArmsStandOffset;
        var p1 = obj.transform.position + Vector3.up * selfController.ArmsCrouchOffset;

        string crouchingName = "crouchToShoot";
        if ( RaycastEnemy(p0, raycastDir, enemy)) {
            blackboard.SetValue(crouchingName, false);
            Debug.Log("WTF1");
            return BehaviorStatus.Success;
        } else if (RaycastEnemy(p1, raycastDir, enemy)) {
            Debug.Log("WTF2");
            blackboard.SetValue(crouchingName, true);
            return BehaviorStatus.Success;
        }


        return BehaviorStatus.Fail;

       
    }

    private bool RaycastEnemy(Vector3 from, Vector3 d, PlayerController enemy) {
        var hits = Physics2D.RaycastAll(from, d, 100, Physics2D.DefaultRaycastLayers & ~skipRaycast.value);

        Debug.Log("Hits: " + hits.Length);
        //find first collision which is not inside player head
        int firstOutsideId = -1;
        for (int i = 0; i < hits.Length; ++i) {
            if (hits[i].fraction > 0.0f) {
                firstOutsideId = i;
                break;
            }
        }

        Debug.Log("Hits name: " + hits[firstOutsideId].transform.name);
        if (firstOutsideId >= 0) {
            var hit = hits[firstOutsideId];
            var g = hit.collider.GetComponent<PlayerController>();
            if (g != null && g == enemy) {
                return true;
            }
        }
        return false;
    }
}