using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.IO;
using System.Text.Json;

namespace Bloxstrap.Singletons
{
    public class FastFlagManager : JsonManager<Dictionary<string, object>>
    {
        public override string FileLocation => Path.Combine(Directories.Modifications, "ClientSettings\\ClientAppSettings.json");

        // we put any changes we want to make to fastflags here
        // these will apply after bloxstrap finishes installing or after the menu closes
        // to delete a fastflag, set the value to null
        public Dictionary<string, object?> Changes = new();

        // only one missing here is Metal because lol
        public static IReadOnlyDictionary<string, string> RenderingModes => new Dictionary<string, string>
        {
            { "Automatic", "" },
            { "Direct3D 11", "FFlagDebugGraphicsPreferD3D11" },
            { "Vulkan", "FFlagDebugGraphicsPreferVulkan" },
            { "OpenGL", "FFlagDebugGraphicsPreferOpenGL" }
        };

        public static IReadOnlyDictionary<string, string> LightingTechnologies => new Dictionary<string, string>
        {
            { "Automatic", "" },
            { "Voxel", "DFFlagDebugRenderForceTechnologyVoxel" },
            { "Future Is Bright", "FFlagDebugForceFutureIsBrightPhase3" }
        };

        // this is one hell of a variable definition lmao
        public static IReadOnlyDictionary<string, Dictionary<string, string?>> IGMenuVersions => new Dictionary<string, Dictionary<string, string?>>
        {
            {
                "Default",
                new Dictionary<string, string?>
                {
                    { "FFlagDisableNewIGMinDUA", null },
                    { "FFlagEnableInGameMenuV3", null }
                }
            },

            {
                "Version 1 (2015)",
                new Dictionary<string, string?>
                {
                    { "FFlagDisableNewIGMinDUA", "True" },
                    { "FFlagEnableInGameMenuV3", "False" }
                }
            },

            {
                "Version 2 (2020)",
                new Dictionary<string, string?>
                {
                    { "FFlagDisableNewIGMinDUA", "False" },
                    { "FFlagEnableInGameMenuV3", "False" }
                }
            },

            {
                "Version 3 (2021)",
                new Dictionary<string, string?>
                {
                    { "FFlagDisableNewIGMinDUA", "False" },
                    { "FFlagEnableInGameMenuV3", "True" }
                }
            }
        };

        // all fflags are stored as strings
        // to delete a flag, set the value as null
        public void SetValue(string key, object? value)
        {
            if (value is null)
            {
                Changes[key] = null;
                App.Logger.WriteLine($"[FastFlagManager::SetValue] Deletion of '{key}' is pending");
            }
            else
            {
                Changes[key] = value.ToString();
                App.Logger.WriteLine($"[FastFlagManager::SetValue] Value change for '{key}' to '{value}' is pending");
            }
        }

        // this returns null if the fflag doesn't exist
        public string? GetValue(string key)
        {
            // check if we have an updated change for it pushed first
            if (Changes.TryGetValue(key, out object? changedValue))
                return changedValue?.ToString();

            if (Prop.TryGetValue(key, out object? value) && value is not null)
                return value.ToString();

            return null;
        }

        public void SetRenderingMode(string value)
        {
            foreach (var mode in RenderingModes)
            {
                if (mode.Key != "Automatic")
                    SetValue(mode.Value, null);
            }

            if (value != "Automatic")
                SetValue(RenderingModes[value], "True");
        }

        public override void Load()
        {
            base.Load();

            // set to 9999 by default if it doesnt already exist
            if (GetValue("DFIntTaskSchedulerTargetFps") is null)
                SetValue("DFIntTaskSchedulerTargetFps", 9999);

            // reshade / exclusive fullscreen requires direct3d 11 to work
            if (GetValue(RenderingModes["Direct3D 11"]) != "True" && (App.Settings.Prop.UseReShade || App.FastFlags.GetValue("FFlagHandleAltEnterFullscreenManually") == "False"))
                SetRenderingMode("Direct3D 11");
        }

        public override void Save()
        {
            App.Logger.WriteLine($"[FastFlagManager::Save] Attempting to save JSON to {FileLocation}...");

            // reload for any changes made while the menu was open
            Load();

            if (Changes.Count == 0)
            {
                App.Logger.WriteLine($"[FastFlagManager::Save] No changes to apply, aborting.");
                return;
            }

            foreach (var change in Changes)
            {
                if (change.Value is null)
                {
                    App.Logger.WriteLine($"[FastFlagManager::Save] Removing '{change.Key}'");
                    Prop.Remove(change.Key);
                    continue;
                }

                App.Logger.WriteLine($"[FastFlagManager::Save] Setting '{change.Key}' to '{change.Value}'");
                Prop[change.Key] = change.Value;
            }

            Directory.CreateDirectory(Path.GetDirectoryName(FileLocation)!);
            File.WriteAllText(FileLocation, JsonSerializer.Serialize(Prop, new JsonSerializerOptions { WriteIndented = true }));

            Changes.Clear();

            App.Logger.WriteLine($"[FastFlagManager::Save] JSON saved!");
        }
    }
}