using Comfort.Common;
using EFT.InventoryLogic;
using EFT.UI;
using EFT.UI.DragAndDrop;
using HarmonyLib;
using SPT.Reflection.Patching;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using TMPro;
using UnityEngine;

namespace UIFixes;

public static class ContextMenuPatches
{
    private static InsuranceInteractions CurrentInsuranceInteractions = null;
    private static RepairInteractions CurrentRepairInteractions = null;
    private static string CreatedButtonInteractionId = null;

    public static void Enable()
    {
        new ContextMenuNamesPatch().Enable();
        new PositionSubMenuPatch().Enable();
        new PositionInsuranceSubMenuPatch().Enable();

        new DeclareSubInteractionsInventoryPatch().Enable();
        new CreateSubInteractionsInventoryPatch().Enable();

        new DeclareSubInteractionsTradingPatch().Enable();
        new CreateSubInteractionsTradingPatch().Enable();

        new SniffInteractionButtonCreationPatch().Enable();
        new ChangeInteractionButtonCreationPatch().Enable();

        new EnableInsureInnerItemsPatch().Enable();

        new DisableLoadPresetOnBulletsPatch().Enable();

        new EmptyModSlotMenuPatch().Enable();
        new EmptyModSlotMenuRemovePatch().Enable();
        new EmptySlotMenuPatch().Enable();
        new EmptySlotMenuRemovePatch().Enable();
    }

    public class ContextMenuNamesPatch : ModulePatch
    {
        protected override MethodBase GetTargetMethod()
        {
            return AccessTools.Method(typeof(ContextMenuButton), nameof(ContextMenuButton.Show));
        }

        [PatchPostfix]
        public static void Postfix(string caption, TextMeshProUGUI ____text)
        {
            if (MultiSelect.Count < 1)
            {
                return;
            }

            if (caption == EItemInfoButton.Insure.ToString())
            {
                InsuranceCompanyClass insurance = ItemUiContext.Instance.Session.InsuranceCompany;
                int count = MultiSelect.ItemContexts.Select(ic => InsuranceItem.FindOrCreate(ic.Item))
                    .Where(i => insurance.ItemTypeAvailableForInsurance(i) && !insurance.InsuredItems.Contains(i))
                    .Count();

                if (count > 0)
                {
                    ____text.text += " (x" + count + ")";
                }
            }
            else if (caption == EItemInfoButton.Equip.ToString())
            {
                int count = MultiSelect.InteractionCount(EItemInfoButton.Equip, ItemUiContext.Instance);
                if (count > 0)
                {
                    ____text.text += " (x" + count + ")";
                }
            }
            else if (caption == EItemInfoButton.Unequip.ToString())
            {
                int count = MultiSelect.InteractionCount(EItemInfoButton.Unequip, ItemUiContext.Instance);
                if (count > 0)
                {
                    ____text.text += " (x" + count + ")";
                }
            }
            else if (caption == EItemInfoButton.LoadAmmo.ToString())
            {
                int count = MultiSelect.InteractionCount(EItemInfoButton.LoadAmmo, ItemUiContext.Instance);
                if (count > 0)
                {
                    ____text.text += " (x" + count + ")";
                }
            }
            else if (caption == EItemInfoButton.UnloadAmmo.ToString())
            {
                int count = MultiSelect.InteractionCount(EItemInfoButton.UnloadAmmo, ItemUiContext.Instance);
                if (count > 0)
                {
                    ____text.text += " (x" + count + ")";
                }
            }
            else if (caption == EItemInfoButton.ApplyMagPreset.ToString())
            {
                int count = MultiSelect.InteractionCount(EItemInfoButton.ApplyMagPreset, ItemUiContext.Instance);
                if (count > 0)
                {
                    ____text.text += " (x" + count + ")";
                }
            }
            else if (caption == EItemInfoButton.Unpack.ToString())
            {
                int count = MultiSelect.InteractionCount(EItemInfoButton.Unpack, ItemUiContext.Instance);
                if (count > 0)
                {
                    ____text.text += " (x" + count + ")";
                }
            }
        }
    }

    public class DeclareSubInteractionsInventoryPatch : ModulePatch
    {
        protected override MethodBase GetTargetMethod()
        {
            return AccessTools.Method(R.InventoryInteractions.Type, "get_SubInteractions");
        }

        [PatchPostfix]
        public static void Postfix(ref IEnumerable<EItemInfoButton> __result)
        {
            __result = __result.Append(EItemInfoButton.Repair).Append(EItemInfoButton.Insure);
        }
    }

    public class CreateSubInteractionsInventoryPatch : ModulePatch
    {
        private static bool LoadingInsuranceActions = false;

        protected override MethodBase GetTargetMethod()
        {
            return AccessTools.Method(R.InventoryInteractions.Type, "CreateSubInteractions");
        }

        [PatchPrefix]
        public static bool Prefix(EItemInfoButton parentInteraction, ISubInteractions subInteractionsWrapper, Item ___item_0, ItemUiContext ___itemUiContext_1)
        {
            // Clear this, since something else should be active (even a different mouseover of the insurance button) 
            LoadingInsuranceActions = false;

            if (parentInteraction == EItemInfoButton.Insure)
            {
                int playerRubles = GetPlayerRubles(___itemUiContext_1);

                CurrentInsuranceInteractions = MultiSelect.Active ?
                    new(MultiSelect.ItemContexts.Select(ic => ic.Item), ___itemUiContext_1, playerRubles) :
                    new(___item_0, ___itemUiContext_1, playerRubles);

                // Because this is async, need to protect against a different subInteractions activating before loading is done
                // This isn't thread-safe at all but now the race condition is a microsecond instead of hundreds of milliseconds.
                LoadingInsuranceActions = true;
                CurrentInsuranceInteractions.LoadAsync(() =>
                {
                    if (LoadingInsuranceActions)
                    {
                        subInteractionsWrapper.SetSubInteractions(CurrentInsuranceInteractions);
                        LoadingInsuranceActions = false;
                    }
                });

                return false;
            }

            if (parentInteraction == EItemInfoButton.Repair)
            {
                int playerRubles = GetPlayerRubles(___itemUiContext_1);

                CurrentRepairInteractions = new(___item_0, ___itemUiContext_1, playerRubles);
                subInteractionsWrapper.SetSubInteractions(CurrentRepairInteractions);

                return false;
            }

            return true;
        }
    }

    public class DeclareSubInteractionsTradingPatch : ModulePatch
    {
        protected override MethodBase GetTargetMethod()
        {
            return AccessTools.Method(R.TradingInteractions.Type, "get_SubInteractions");
        }

        [PatchPostfix]
        public static void Postfix(ref IEnumerable<EItemInfoButton> __result)
        {
            __result = __result.Append(EItemInfoButton.Repair).Append(EItemInfoButton.Insure);
        }
    }

    public class CreateSubInteractionsTradingPatch : ModulePatch
    {
        private static bool LoadingInsuranceActions = false;

        protected override MethodBase GetTargetMethod()
        {
            return AccessTools.Method(R.TradingInteractions.Type, "CreateSubInteractions");
        }

        [PatchPrefix]
        public static bool Prefix(object __instance, EItemInfoButton parentInteraction, ISubInteractions subInteractionsWrapper, ItemUiContext ___itemUiContext_0)
        {
            // Clear this, since something else should be active (even a different mouseover of the insurance button) 
            LoadingInsuranceActions = false;

            var wrappedInstance = new R.TradingInteractions(__instance);

            if (parentInteraction == EItemInfoButton.Insure)
            {
                int playerRubles = GetPlayerRubles(___itemUiContext_0);

                // CreateSubInteractions is only on the base class here, which doesn't have an Item. But __instance is actually a GClass3054
                Item item = wrappedInstance.Item;

                CurrentInsuranceInteractions = new(item, ___itemUiContext_0, playerRubles);
                CurrentInsuranceInteractions = MultiSelect.Active ?
                    new(MultiSelect.ItemContexts.Select(ic => ic.Item), ___itemUiContext_0, playerRubles) :
                    new(item, ___itemUiContext_0, playerRubles);

                // Because this is async, need to protect against a different subInteractions activating before loading is done
                // This isn't thread-safe at all but now the race condition is a microsecond instead of hundreds of milliseconds.
                LoadingInsuranceActions = true;
                CurrentInsuranceInteractions.LoadAsync(() =>
                {
                    if (LoadingInsuranceActions)
                    {
                        subInteractionsWrapper.SetSubInteractions(CurrentInsuranceInteractions);
                        LoadingInsuranceActions = false;
                    }
                });

                return false;
            }

            if (parentInteraction == EItemInfoButton.Repair)
            {
                int playerRubles = GetPlayerRubles(___itemUiContext_0);

                // CreateSubInteractions is only on the base class here, which doesn't have an Item. But __instance is actually a GClass3054
                Item item = wrappedInstance.Item;

                CurrentRepairInteractions = new(item, ___itemUiContext_0, playerRubles);
                subInteractionsWrapper.SetSubInteractions(CurrentRepairInteractions);

                return false;
            }

            return true;
        }
    }

    public class SniffInteractionButtonCreationPatch : ModulePatch
    {
        protected override MethodBase GetTargetMethod()
        {
            return AccessTools.Method(typeof(InteractionButtonsContainer), nameof(InteractionButtonsContainer.method_3));
        }

        [PatchPrefix]
        public static void Prefix(DynamicInteractionClass interaction)
        {
            if (interaction.IsInsuranceInteraction() || interaction.IsRepairInteraction())
            {
                CreatedButtonInteractionId = interaction.Id;
            }
        }

        [PatchPostfix]
        public static void Postfix()
        {
            CreatedButtonInteractionId = null;
        }
    }

    public class ChangeInteractionButtonCreationPatch : ModulePatch
    {
        protected override MethodBase GetTargetMethod()
        {
            return AccessTools.Method(typeof(InteractionButtonsContainer), nameof(InteractionButtonsContainer.method_5));
        }

        [PatchPrefix]
        public static void Prefix(SimpleContextMenuButton button)
        {
            if (!String.IsNullOrEmpty(CreatedButtonInteractionId))
            {
                if (InsuranceInteractions.IsInsuranceInteractionId(CreatedButtonInteractionId) && CurrentInsuranceInteractions != null)
                {
                    button.SetButtonInteraction(CurrentInsuranceInteractions.GetButtonInteraction(CreatedButtonInteractionId));
                }
                else if (RepairInteractions.IsRepairInteractionId(CreatedButtonInteractionId) && CurrentRepairInteractions != null)
                {
                    button.SetButtonInteraction(CurrentRepairInteractions.GetButtonInteraction(CreatedButtonInteractionId));
                }
            }
        }
    }

    public class CleanUpInteractionsPatch : ModulePatch
    {
        protected override MethodBase GetTargetMethod()
        {
            return AccessTools.Method(typeof(SimpleContextMenu), nameof(SimpleContextMenu.Close));
        }

        [PatchPostfix]
        public static void Postfix()
        {
            CurrentInsuranceInteractions = null;
            CurrentRepairInteractions = null;
            CreatedButtonInteractionId = null;
        }
    }

    public class EnableInsureInnerItemsPatch : ModulePatch
    {
        protected override MethodBase GetTargetMethod()
        {
            return AccessTools.Method(R.ContextMenuHelper.Type, "IsInteractive");
        }

        [PatchPrefix]
        public static bool Prefix(object __instance, EItemInfoButton button, ref IResult __result, Item ___item_0)
        {
            if (button != EItemInfoButton.Insure)
            {
                return true;
            }

            InsuranceCompanyClass insurance = new R.ContextMenuHelper(__instance).InsuranceCompany;

            IEnumerable<Item> items = MultiSelect.Active ? MultiSelect.ItemContexts.Select(ic => ic.Item) : [___item_0];
            IEnumerable<InsuranceItem> InsuranceItemes = items.Select(InsuranceItem.FindOrCreate);
            IEnumerable<InsuranceItem> insurableItems = InsuranceItemes.SelectMany(insurance.GetItemChildren)
                .Flatten(insurance.GetItemChildren)
                .Concat(InsuranceItemes)
                .Where(i => insurance.ItemTypeAvailableForInsurance(i) && !insurance.InsuredItems.Contains(i));

            if (insurableItems.Any())
            {
                __result = SuccessfulResult.New;
                return false;
            }

            return true;
        }
    }

    public class DisableLoadPresetOnBulletsPatch : ModulePatch
    {
        protected override MethodBase GetTargetMethod()
        {
            return AccessTools.Method(typeof(MagazineBuildClass), nameof(MagazineBuildClass.TryFindPresetSource));
        }

        [PatchPrefix]
        public static bool Prefix(Item selectedItem, ref GStruct416<Item> __result)
        {
            if (Settings.LoadMagPresetOnBullets.Value)
            {
                return true;
            }

            if (selectedItem is BulletClass)
            {
                __result = new MagazineBuildClass.Class3183(selectedItem);
                return false;
            }

            return true;
        }
    }

    public class EmptyModSlotMenuPatch : ModulePatch
    {
        protected override MethodBase GetTargetMethod()
        {
            return AccessTools.DeclaredMethod(typeof(ModSlotView), nameof(ModSlotView.Show));
        }

        [PatchPostfix]
        public static void Postfix(ModSlotView __instance, Slot slot, ItemContextAbstractClass parentItemContext, ItemUiContext itemUiContext)
        {
            if (!Settings.EnableSlotSearch.Value || slot.ContainedItem != null)
            {
                return;
            }

            EmptySlotMenuTrigger menuTrigger = __instance.GetOrAddComponent<EmptySlotMenuTrigger>();
            menuTrigger.Init(slot, parentItemContext, itemUiContext);
        }
    }

    public class EmptyModSlotMenuRemovePatch : ModulePatch
    {
        protected override MethodBase GetTargetMethod()
        {
            return AccessTools.DeclaredMethod(typeof(ModSlotView), nameof(ModSlotView.SetupItemView));
        }

        [PatchPostfix]
        public static void Postfix(ModSlotView __instance)
        {
            EmptySlotMenuTrigger menuTrigger = __instance.GetComponent<EmptySlotMenuTrigger>();
            if (menuTrigger != null)
            {
                UnityEngine.Object.Destroy(menuTrigger);
            }
        }
    }

    public class EmptySlotMenuPatch : ModulePatch
    {
        protected override MethodBase GetTargetMethod()
        {
            // SetSlotGraphics is called with false both during setup and when an item is removed
            return AccessTools.DeclaredMethod(typeof(SlotView), nameof(SlotView.SetSlotGraphics));
        }

        [PatchPostfix]
        public static void Postfix(SlotView __instance, bool fullSlot, ItemUiContext ___ItemUiContext)
        {
            if (!Settings.EnableSlotSearch.Value || fullSlot)
            {
                return;
            }

            EmptySlotMenuTrigger menuTrigger = __instance.GetOrAddComponent<EmptySlotMenuTrigger>();
            menuTrigger.Init(__instance.Slot, __instance.ParentItemContext, ___ItemUiContext);
        }
    }

    public class EmptySlotMenuRemovePatch : ModulePatch
    {
        protected override MethodBase GetTargetMethod()
        {
            return AccessTools.DeclaredMethod(typeof(SlotView), nameof(SlotView.SetupItemView));
        }

        [PatchPostfix]
        public static void Postfix(SlotView __instance)
        {
            EmptySlotMenuTrigger menuTrigger = __instance.GetComponent<EmptySlotMenuTrigger>();
            if (menuTrigger != null)
            {
                UnityEngine.Object.Destroy(menuTrigger);
            }
        }
    }

    public class PositionSubMenuPatch : ModulePatch
    {
        protected override MethodBase GetTargetMethod()
        {
            return AccessTools.Method(R.InventoryInteractions.Type, "CreateSubInteractions");
        }

        // Existing logic tries to place it on the right, moving to the left if necessary. They didn't do it correctly, so it always goes on the left.
        [PatchPostfix]
        public static void Postfix(ISubInteractions subInteractionsWrapper)
        {
            if (subInteractionsWrapper is not InteractionButtonsContainer buttonsContainer)
            {
                return;
            }

            var wrappedContainer = buttonsContainer.R();
            SimpleContextMenuButton button = wrappedContainer.ContextMenuButton;
            SimpleContextMenu flyoutMenu = wrappedContainer.ContextMenu;

            if (button == null || flyoutMenu == null)
            {
                return;
            }

            PositionContextMenuFlyout(button, flyoutMenu);
        }
    }

    // Insurance submenu is async, need to postfix the actual set call
    public class PositionInsuranceSubMenuPatch : ModulePatch
    {
        protected override MethodBase GetTargetMethod()
        {
            return AccessTools.Method(typeof(InteractionButtonsContainer), nameof(InteractionButtonsContainer.SetSubInteractions)).MakeGenericMethod([typeof(InsuranceInteractions.EInsurers)]);
        }

        // Existing logic tries to place it on the right, moving to the left if necessary. They didn't do it correctly, so it always goes on the left.
        [PatchPostfix]
        public static void Postfix(SimpleContextMenuButton ___simpleContextMenuButton_0, SimpleContextMenu ___simpleContextMenu_0)
        {
            PositionContextMenuFlyout(___simpleContextMenuButton_0, ___simpleContextMenu_0);
        }
    }

    private static void PositionContextMenuFlyout(SimpleContextMenuButton button, SimpleContextMenu flyoutMenu)
    {
        RectTransform buttonTransform = button.RectTransform();
        RectTransform flyoutTransform = flyoutMenu.RectTransform();

        Vector2 leftPosition = flyoutTransform.position; // BSG's code will always put it on the left
        leftPosition = new Vector2((float)Math.Round((double)leftPosition.x), (float)Math.Round((double)leftPosition.y));

        Vector2 size = buttonTransform.rect.size;
        Vector2 rightPosition = size - size * buttonTransform.pivot;
        rightPosition = buttonTransform.TransformPoint(rightPosition);

        // Round vector the way that CorrectPosition does
        rightPosition = new Vector2((float)Math.Round((double)rightPosition.x), (float)Math.Round((double)rightPosition.y));

        if (Settings.ContextMenuOnRight.Value)
        {
            // Try on the right
            flyoutTransform.position = rightPosition;
            flyoutMenu.CorrectPosition();

            // This means CorrectPosition() moved it
            if (!(flyoutTransform.position.x - rightPosition.x).IsZero())
            {
                flyoutTransform.position = leftPosition;
            }
        }
        else
        {
            flyoutTransform.position = leftPosition;
            flyoutMenu.CorrectPosition();

            if (!(flyoutTransform.position.x - leftPosition.x).IsZero())
            {
                flyoutTransform.position = rightPosition;
            }
        }
    }

    private static int GetPlayerRubles(ItemUiContext itemUiContext)
    {
        StashClass stash = itemUiContext.R().InventoryController.Inventory.Stash;
        if (stash == null)
        {
            return 0;
        }

        return R.Money.GetMoneySums(stash.Grid.ContainedItems.Keys)[ECurrencyType.RUB];
    }
}