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

public class PlayerManager : MonoBehaviour
{

    public float speed = 10;
    public float runSpeed = 25;
    public float rotateSpeed = 5;
    public float mouseSensitive = 200;
    public float buildRate = 0.5f;
    public float health = 100;
    private float actualHealth = 100;
    private float buildTime;
    private bool run = false;
    private Camera playerCamera;
    private Rigidbody rigidBody;
    public int barricadeMaterials = 10;
    public List<GameObject> weaponList = new List<GameObject>();
    private GameObject createWeapon;
    [HideInInspector]public int selectedWeapon = 0;


    // Start is called before the first frame update
    void Start()
    {
        actualHealth = health;
        buildTime = buildRate;
        playerCamera = GetComponentInChildren<Camera>();
        rigidBody = GetComponent<Rigidbody>();
        Cursor.lockState = CursorLockMode.Locked;
        Cursor.visible = false;
    }

    // Update is called once per frame
    void Update()
    {
        Move();
        RunSwitch();
        SelectWeapon();
        BuildBlock();
        Interact();

        if (actualHealth <= 0)
        {
            SceneManager.LoadScene(SceneManager.GetActiveScene().name, LoadSceneMode.Single);
        }
    }

    void FixedUpdate()
    {
        Rotate();
    }

    void Move()
    {
        rigidBody.MovePosition(
            transform.position + 
            (transform.forward * (run ? runSpeed : speed) * Input.GetAxis("Vertical") * Time.deltaTime) +
            (transform.right * (run ? runSpeed : speed) * Input.GetAxis("Horizontal") * Time.deltaTime)
        );
    }

    public void Damage(float damage)
    {
        actualHealth -= damage;
    }

    void Rotate()
    {
        rigidBody.freezeRotation = false;
        transform.Rotate(new Vector3(0, rotateSpeed * Input.GetAxis("Mouse X") * mouseSensitive * Time.deltaTime, 0));
        if (
            ((playerCamera.transform.localEulerAngles.x >= 270 && playerCamera.transform.localEulerAngles.x <= 360) &&
            playerCamera.transform.localEulerAngles.y == 0 &&
            playerCamera.transform.localEulerAngles.z == 0) ||
            ((playerCamera.transform.localEulerAngles.x <= 90 && playerCamera.transform.localEulerAngles.x >= 0) &&
            playerCamera.transform.localEulerAngles.y == 0 &&
            playerCamera.transform.localEulerAngles.z == 0)
        ) {
            playerCamera.transform.Rotate(new Vector3(rotateSpeed * -Input.GetAxis("Mouse Y") * mouseSensitive * Time.deltaTime, 0, 0));
        } else if (
            ((playerCamera.transform.localEulerAngles.x >= 270 && playerCamera.transform.localEulerAngles.x <= 360) &&
            playerCamera.transform.localEulerAngles.y == 180 &&
            playerCamera.transform.localEulerAngles.z == 180)
        ) {
            playerCamera.transform.Rotate(new Vector3(rotateSpeed * (-Input.GetAxis("Mouse Y") > 0 ? -Input.GetAxis("Mouse Y") : 0) * mouseSensitive * Time.deltaTime, 0, 0));
        } else if (
          ((playerCamera.transform.localEulerAngles.x <= 90 && playerCamera.transform.localEulerAngles.x >= 0) &&
          playerCamera.transform.localEulerAngles.y == 180 &&
          playerCamera.transform.localEulerAngles.z == 180)
        ) {
            playerCamera.transform.Rotate(new Vector3(rotateSpeed * (-Input.GetAxis("Mouse Y") < 0 ? -Input.GetAxis("Mouse Y") : 0) * mouseSensitive * Time.deltaTime, 0, 0));
        }
        else
        {
            playerCamera.transform.Rotate(new Vector3(rotateSpeed * -Input.GetAxis("Mouse Y") * mouseSensitive * Time.deltaTime, 0, 0));
        }
        rigidBody.freezeRotation = true;
    }

    void RunSwitch()
    {
        if (Input.GetAxisRaw("Run") > 0)
        {
            run = true;
        }
        else
        {
            run = false;
        }
    }

    void SelectWeapon()
    {
        if (weaponList.Count > 0)
        {
            if (Input.mouseScrollDelta.y > 0)
            {
                WeaponManager weaponManager = weaponList[selectedWeapon].GetComponent<WeaponManager>();
                if (weaponManager != null && createWeapon != null)
                {
                    Destroy(createWeapon);
                }
                if (weaponList.Count > selectedWeapon + 1) {
                    selectedWeapon++;
                }
                else
                {
                    selectedWeapon = 0;
                }
            }
            else if (Input.mouseScrollDelta.y < 0)
            {
                WeaponManager weaponManager = weaponList[selectedWeapon].GetComponent<WeaponManager>();
                if (weaponManager != null && createWeapon != null)
                {
                    Destroy(createWeapon);
                }
                if (selectedWeapon > 0)
                {
                    selectedWeapon--;
                }
                else
                {
                    selectedWeapon = weaponList.Count - 1;
                }
            }
            WeaponManager weaponManager2 = weaponList[selectedWeapon].GetComponent<WeaponManager>();
            if (weaponManager2 != null && createWeapon == null)
            {
                createWeapon = Instantiate(weaponList[selectedWeapon]) as GameObject;
                createWeapon.transform.parent = playerCamera.transform;
                createWeapon.transform.localPosition = Vector3.zero;
                createWeapon.transform.localEulerAngles = Vector3.zero;
            }
        }
    }

    void BuildBlock ()
    {
        if (Input.GetAxisRaw("Fire1") > 0 && buildTime < Time.time && weaponList.Count > 0)
        {
            Ray ray = playerCamera.ScreenPointToRay(Input.mousePosition);
            RaycastHit hit;
            if (Physics.Raycast(ray, out hit, Mathf.Infinity, LayerMask.GetMask("BuildPlace")))
            {
                BlockManager blockManager = weaponList[selectedWeapon].GetComponent<BlockManager>();
                if (blockManager != null) { 
                    Instantiate(weaponList[selectedWeapon], hit.point, transform.rotation);
                    buildTime = buildRate + Time.time;
                }
            }
        }
    }

    void Interact()
    {
        Ray ray = playerCamera.ScreenPointToRay(Input.mousePosition);
        RaycastHit hit;
        if (Physics.Raycast(ray, out hit, 1))
        {
            if (Input.GetAxisRaw("Build") > 0 && buildTime < Time.time && barricadeMaterials > 0 && hit.transform.tag == "BarricadeField")
            {
                BarricadeManager barricadeManager = hit.transform.GetComponent<BarricadeManager>();
                barricadeManager.addPlank();
                //barricadeMaterials--; //než bude jistota že uděláme zbírání materiálu
                buildTime = buildRate + Time.time;
            }
            if (Input.GetAxisRaw("Build") > 0 && hit.transform.tag == "Interact")
            {
                BlockManager blockManager = hit.transform.GetComponent<BlockManager>();
                blockManager.Action();
            }
        }
    }
}