using BepInEx;
using BepInEx.Configuration;
using EFT;
using UnityEngine;
using Comfort.Common;
using System.Reflection;
using System.Collections;
using EFT.Settings.Graphics;
using System.ComponentModel;

namespace ScopeTweaks
{
    [BepInPlugin("com.notGreg.scopeTweaks", "notGreg's Scope Tweaks", "2.0.0")]
    public class Plugin : BaseUnityPlugin
    {
        ConfigEntry<int> cameraResolutionScale;
        ConfigEntry<int> scopeCameraResolutionScale;
        ConfigEntry<EFOVScalingMode> scopeFixType;

        enum EFOVScalingMode
        {
            Disabled,
            [Description("Magnified optics")]
            ScopesOnly,
            [Description("All sights")]
            All,
        }

        void Awake()
        {
            cameraResolutionScale = Config.Bind(
                "General",
                "Main camera scale %",
                80,
                new ConfigDescription("Additional override applied on top of currently enabled resolution scaling method.", new AcceptableValueRange<int>(25, 100)));

            scopeCameraResolutionScale = Config.Bind(
                "General",
                "Scope camera scale %",
                80,
                new ConfigDescription("Additional override applied on top of currently enabled resolution scaling method.", new AcceptableValueRange<int>(25, (int)(100f / currentScalingFactor))));

            scopeFixType = Config.Bind("General", "High FOV sight tweak", EFOVScalingMode.ScopesOnly, new ConfigDescription(""));
        }






        void Update()
        {
            if (Singleton<AbstractGame>.Instance == null) return;
            GameStatus currentGameState = Singleton<AbstractGame>.Instance.Status;

            if (!gameStateChanged(currentGameState)) return;

            switch(currentGameState)
            {
                case GameStatus.Started:
                    {
                        Logger.LogInfo("Getting local player");
                        mainPlayer = getLocalPlayer();

                        subscribeHandsChangedEvent();

                        Logger.LogInfo("Assigning cameras...");
                        StartCoroutine(tryGetMainCamera());
                        StartCoroutine(tryGetScopeCamera());

                        break;
                    }
                case GameStatus.SoftStopping:
                case GameStatus.Stopped:
                    {
                        Logger.LogInfo("Resetting...");
                        FPSCamera = null;
                        scopeCamera = null;
                        mainPlayer = null;
                        break;
                    }
                default: break;
            }
        }

        /// <summary>
        /// GAME STATUS
        /// </summary>

        GameStatus lastGameState;
        bool gameStateChanged(GameStatus currentState)
        {
            if (currentState == lastGameState) return false;
            lastGameState = currentState;
            return true;
        }

        Player mainPlayer;
        Player getLocalPlayer()
        {
            return Singleton<GameWorld>.Instance.RegisteredPlayers.Find(p => p.IsYourPlayer);
        }

        /// <summary>
        /// FIELD OF VIEW
        /// </summary>
        
        int inGameFOV;
        int getInGameFOV()
        {
            int fov = Singleton<GClass1642>.Instance.Game.Settings.FieldOfView.Value;
            Logger.LogInfo($"In-game FOV: {fov}");
            return fov;
        }

        void setInGameFOV(int value)
        {
            Logger.LogInfo($"setInGameFOV(): Update to {value}");
            Singleton<GClass1642>.Instance.Game.Settings.FieldOfView.Value = value;
        }

        /// <summary>
        /// CAMERA SETUP
        /// </summary>

        Camera FPSCamera = null;
        Camera scopeCamera = null;

        SSAA ssaaInstance = null;
        FieldInfo _nextSSRation = null;

        WaitForSeconds myDelaySec = new WaitForSeconds(1);
        IEnumerator tryGetMainCamera()
        {
            string cameraName = "FPS Camera";
            if (GameObject.Find(cameraName) != null)
            {
                FPSCamera = GameObject.Find(cameraName).GetComponent<Camera>();
                Logger.LogInfo($"{FPSCamera.name} found!");
            }
            else
            {
                Logger.LogMessage($"Camera \"{cameraName}\" not found, rescheduling...");
                yield return myDelaySec;
                StartCoroutine(tryGetMainCamera());
                yield break;
            }
            yield return null;
        }

        FieldInfo getFieldInfo(string fieldName)
        {
            return typeof(SSAA).GetField(fieldName, BindingFlags.NonPublic | BindingFlags.Instance);
        }

        IEnumerator tryGetScopeCamera()
        {
            string cameraName = "BaseOpticCamera(Clone)";
            if (GameObject.Find(cameraName) != null)
            {
                scopeCamera = GameObject.Find(cameraName).GetComponent<Camera>();
                Logger.LogInfo($"Camera \"{scopeCamera.name}\" found!");
            }
            yield break;
        }

        void setMainCameraResolutionScale(int value = 100)
        {
            Logger.LogInfo($"Setting MainCam res scale to {value}%");
            ssaaInstance = FPSCamera.GetComponent<SSAA>();
            _nextSSRation = getFieldInfo("_nextSSRation");
            _nextSSRation.SetValue(ssaaInstance, (float)(currentScalingFactor * value / 100f));
        }

        void setScopeCameraResolutionScale(int value)
        {
            if(scopeCamera == null || !scopeCamera.isActiveAndEnabled)
            { Logger.LogInfo("ScopeCam inactive or absent!"); 
                return; }

            Logger.LogInfo($"Setting Scope res scale to {value}%");
            scopeCamera.GetComponent<SSAAOptic>().OpticCameraToMainCameraResolutionRatio = (float)(currentScalingFactor * value / 100);
        }

        /// <summary>
        /// PLAYER WEAPON EVENTS
        /// </summary>
        void subscribeHandsChangedEvent()
        {
            Logger.LogInfo("Subscribing to HandsChanged Event");
            mainPlayer.HandsChangedEvent += (handsArgs) =>
            {
                subscribeOnAimingChangedEvent();
            };
        }

        void subscribeOnAimingChangedEvent()
        {
            
            Logger.LogInfo("Subscribing to OnAimingChanged Event");
            mainPlayer.HandsController.OnAimingChanged += (aimingArgs) =>
            {
                currentScalingFactor = getCurrentScalingFactor();
                StartCoroutine(tryGetScopeCamera());

                Logger.LogInfo("AimingChanged: notAiming");
                if (!mainPlayer.ProceduralWeaponAnimation.IsAiming)
                {
                      switch(scopeFixType.Value)
                    {
                        case EFOVScalingMode.Disabled:
                            {
                                Logger.LogInfo("Nothing to do!");
                                break;
                            }
                        case EFOVScalingMode.ScopesOnly:
                            {
                                setMainCameraResolutionScale();
                                GClass1774.Instance.SetFov(inGameFOV, 0.33f, false);
                                setInGameFOV(inGameFOV);
                                break;
                            }
                        case EFOVScalingMode.All:
                            {
                                setMainCameraResolutionScale();
                                GClass1774.Instance.SetFov(inGameFOV, 0.33f, false);
                                setInGameFOV(inGameFOV);
                                break;
                            }
                    }
                }

                Logger.LogInfo("Entering switch()");
                if (mainPlayer.ProceduralWeaponAnimation.IsAiming)
                {
                    if (inGameFOV != 50) { inGameFOV = getInGameFOV(); }
                    switch (scopeFixType.Value)
                    {
                        case EFOVScalingMode.Disabled:
                            {
                                Logger.LogInfo("Plugin is disabled!");
                                break;
                            }
                        case EFOVScalingMode.ScopesOnly:
                            {
                                Logger.LogInfo("Only magnified optics!");
                                if(scopeCamera.isActiveAndEnabled)
                                {
                                    applyFixesWhileAiming();
                                }
                                break;
                            }
                        case EFOVScalingMode.All:
                            {
                                Logger.LogInfo("All sights!");

                                applyFixesWhileAiming();

                                break;
                            }
                    }
                }
            };
        }

        void applyFixesWhileAiming()
        {
            GClass1774.Instance.SetFov(35, 0.25f, false);
            setInGameFOV(50);

            setMainCameraResolutionScale(cameraResolutionScale.Value);
            setScopeCameraResolutionScale(scopeCameraResolutionScale.Value);
        }

        /// <summary>
        /// IN-GAME SETTINGS
        /// </summary>

        float currentScalingFactor = 1.0f;

        float getCurrentScalingFactor()
        {
            Logger.LogInfo("Getting current scaling factor:");
            var graphics = Singleton<GClass1642>.Instance.Graphics.Settings;

            if (!graphics.DLSSEnabled && !graphics.FSREnabled)
            {
                Logger.LogInfo($"Supersampling factor: {graphics.SuperSamplingFactor}");
                return graphics.SuperSamplingFactor;
            }

            if (graphics.DLSSEnabled)
            {
                float DLSSFactor = 1.0f;
                switch (graphics.DLSSMode.Value)
                {
                    case EDLSSMode.Off: { DLSSFactor = 1.0f; break; }
                    case EDLSSMode.Quality: { DLSSFactor = 0.67f; break; }
                    case EDLSSMode.Balanced: { DLSSFactor = 0.58f; break; }
                    case EDLSSMode.Performance: { DLSSFactor = 0.5f; break; }
                    case EDLSSMode.UltraPerformance: { DLSSFactor = 0.33f; break; }
                }
                Logger.LogInfo($"DLSS factor: {DLSSFactor}");
                return DLSSFactor;
            }
            if (graphics.FSREnabled)
            {
                float FSRFactor = 1.0f;
                switch (graphics.FSRMode.Value)
                {
                    case EFSRMode.Off: { FSRFactor = 1.0f; break; }
                    case EFSRMode.UltraQuality: { FSRFactor = 0.77f; break; }
                    case EFSRMode.Quality: { FSRFactor = 0.66f; break; }
                    case EFSRMode.Balanced: { FSRFactor = 0.59f; break; }
                    case EFSRMode.Performance: { FSRFactor = 0.5f; break; }
                }
                Logger.LogInfo($"FSR factor: {FSRFactor}");
                return FSRFactor;
            }

            Logger.LogInfo($"GetCurrentScalingFactor(): Something went wrong. Returning 1.0f");
            return 1.0f;
        }
    } 
}