using System;
using CryEngine;
using System.Collections.Generic;

namespace CryEngine.Game
{
    [EntityComponent(Guid="0bbe85a3-8e95-594e-3782-31797a4a23be")]
    public class WeaponSwitching : EntityComponent
    {
        /// <summary>
        /// Called at the start of the game.
        /// </summary>
        ///


        [EntityProperty]
        public string Gun1 { get; set; } = "Gun1";
        [EntityProperty]
        public string Gun2 { get; set; } = "Gun2";
        [EntityProperty]
        public string Gun3 { get; set; } = "Gun3";
        [EntityProperty]
        public string Gun4 { get; set; } = "Gun4";


        //  public string[] WeaponNames { get; set; }

        public List<Entity> Weapons = new List<Entity>();
        public List<int> Inventory = new List<int>();
        public int InventoryLimit = 0;
        public int selectedWeapon;

        [EntityProperty]
        public int MaxLimit { get; set; } = 2;


        protected override void OnGameplayStart()
        {
            selectedWeapon = 0;
            AddWeapon(0);
        }

        protected override void OnUpdate(float frameTime)
        {

            if (Input.KeyDown(KeyId.Z))
            {
                if(Inventory.Count > 1)
                {
                    SwitchWeapon();
                }
            }
        }

        // here we find all the weapons by name
        // and set there entitys to your WeaponList
        public void ConstructWeaponList()
        {

            List<string> WeaponNames = new List<string>();

            WeaponNames.Add(Gun1);
            WeaponNames.Add(Gun2);
            WeaponNames.Add(Gun3);
            WeaponNames.Add(Gun4);

            for (int i = 0; i < WeaponNames.Count; i++)
            {
                Weapons.Add(Entity.Find(WeaponNames[i]));
            }
        }

        // switches the weapons
        public void SwitchWeapon()
        {
            selectedWeapon += 1;
            if(selectedWeapon > Inventory.Count - 1)
            {
                selectedWeapon = 0;
            }
            SelectWeapon(Inventory[selectedWeapon]);
        }


        // this adds an new weapon based on
        // the Weapons index
        public void AddWeapon(int index)
        {

            // if we already have the weapon fill the amo
            if(Inventory.Contains(index))
            {
                // get the entity that was got and fill ammo
                for (int i = 0; i < Inventory.Count; i++)
                {
                    if (Inventory[i] == index)
                    {

                        selectedWeapon = i;
                        Weapons[i].GetComponent<Gun>().FillAmmo();
                    }

                }

                SelectWeapon(index);

                return;
            }

            if (InventoryLimit <= MaxLimit)
            {
                Inventory.Add(index);
                SelectWeapon(index);
                selectedWeapon = InventoryLimit;
                InventoryLimit += 1;
            }
            else
            {
                for (int i = 0; i < Inventory.Count; i++)
                {
                    if (i == Inventory[selectedWeapon]){

                        Inventory.Remove(i);
                        break;
                    }
                }

                Inventory.Add(index);
                SelectWeapon(index);
                selectedWeapon = 0;
            }


        }

        void SelectWeapon(int index)
        {
            foreach(Entity weapon in Weapons)
            {
                // enable selected weapon
                if (weapon.GetComponent<Gun>() != null)
                {
                    weapon.GetComponent<Gun>().GunEnabled = false;
                    weapon.Hidden = true;
                    if (weapon == Weapons[index])
                    {
                        weapon.GetComponent<Gun>().GunEnabled = true;
                        weapon.Hidden = false;
                    }
                }

            }
        }

    }
}