using BepInEx;
using BepInEx.Configuration;
using System;
using UnityEngine;

namespace UniformAim
{
    public class Core
    {
        //math stuff
        public float CalculateHFOV(float FOV)
        {
            //RETURNS RADIANS
            return Camera.VerticalToHorizontalFieldOfView(FOV, Camera.main.aspect);
        }

        //calculate sensitivity based on FOV delta and coefficient
        public float CalculateSensitivity(float aimedFOV, float hipFOV)
        {
            //calculate horizontal FOV values for inputs
            aimedFOV = CalculateHFOV(aimedFOV) * Mathf.Deg2Rad;
            hipFOV = CalculateHFOV(hipFOV) * Mathf.Deg2Rad;

            float exponent = (float)(100f / Plugin.configCoeff.Value);

            float tanRatio = (float)(Math.Tan(aimedFOV / 2) / (Math.Tan(hipFOV / 2)));

            float sensitivity = Plugin.configSens.Value / 100f;

            float result = (float)Math.Pow(tanRatio, exponent) * sensitivity;

            return result;
        }

        //check if BaseOpticCamera is present and active
        public static bool isScopeCameraActive()
        {
            if(Camera.allCamerasCount > 1) { return Camera.allCameras[1].GetComponent<Behaviour>().isActiveAndEnabled; }
            return false;
        }
        //figure out current fov based on scope and in-game camera statuses
        public float DetermineCurrentFOV(float FPSCameraFOV, float ScopeCameraFOV, int SelectedScope, int SelectedScopeMode = 0)
        {
            //dirty fix for the Ultima MP-155 shotgun
            try 
            { 
                if(GameObject.Find("tactical_mp155_kalashnikov_ultima_camera(Clone)").GetComponent<Behaviour>().isActiveAndEnabled)
                {
                    if (Plugin.currentFPSCameraFOV > (Plugin.configFOV.Value - 15) && isScopeCameraActive() && Plugin.currentScopeCameraFOV == 15) { return Plugin.currentFPSCameraFOV; }
                }
            }
            catch (NullReferenceException)
            {
                return Plugin.currentFPSCameraFOV;
            }
            //if (Plugin.currentFPSCameraFOV > (Plugin.configFOV.Value - 15) && isScopeCameraActive() && Plugin.currentScopeCameraFOV == 15) { return Plugin.currentFPSCameraFOV; }

            //dirty fix for Leupold D-EVO mod
            try
            { 
                if(GameObject.Find("scope_leupold_d_evo(Clone)").GetComponent<Behaviour>().isActiveAndEnabled)
                {
                    switch (Plugin.SelectedScope)
                    {
                        case 0: return Plugin.currentFPSCameraFOV;
                        case 1: return Plugin.currentScopeCameraFOV;
                    }
                }
            }
            catch(NullReferenceException)
            {
                return Plugin.currentFPSCameraFOV;
            }

            try 
            {
                if(Camera.main.isActiveAndEnabled && Plugin.SelectedScope == 0 && isScopeCameraActive())
                {
                    return Plugin.currentScopeCameraFOV;
                }
                else { return Plugin.currentFPSCameraFOV; }
            }
            catch (NullReferenceException)
            {
                return Plugin.configFOV.Value;
            }

           // if (Plugin.SelectedScope == 0 && isScopeCameraActive()) { return Plugin.currentScopeCameraFOV;  } else { return Plugin.currentFPSCameraFOV;  }
        }
    }
}