ITEMCATEGORY_ID = {
    Weapon =     0,
    Armor =      1,
    Talisman =   2,
    Goods =      4,
    AshOfWar =   8, 
}

local trackedGoods = {
    [1] = true, -- Dev Tool: Map Reloader
    [EMPTY_PHYSICK] = true, -- Physick Flask (Empty)
    [FULL_PHYSICK] = 392610, -- Physick Flask (Full)
    [1000] = true, -- Flask of Crimson Tears (Empty)
    [1001] = 392620, -- Flask of Crimson Tears +0 (Full)
    [1002] = true, -- Flask of Crimson Tears +1 (Empty)
    [1003] = 392620, -- Flask of Crimson Tears +1 (Full)
    [1004] = true, -- Flask of Crimson Tears +2 (Empty)
    [1005] = 392620, -- Flask of Crimson Tears +2 (Full)
    [1006] = true, -- Flask of Crimson Tears +3 (Empty)
    [1007] = 392620, -- Flask of Crimson Tears +3 (Full)
    [1008] = true, -- Flask of Crimson Tears +4 (Empty)
    [1009] = 392620, -- Flask of Crimson Tears +4 (Full)
    [1010] = true, -- Flask of Crimson Tears +5 (Empty)
    [1011] = 392620, -- Flask of Crimson Tears +5 (Full)
    [1012] = true, -- Flask of Crimson Tears +6 (Empty)
    [1013] = 392620, -- Flask of Crimson Tears +6 (Full)
    [1014] = true, -- Flask of Crimson Tears +7 (Empty)
    [1015] = 392620, -- Flask of Crimson Tears +7 (Full)
    [1016] = true, -- Flask of Crimson Tears +8 (Empty)
    [1017] = 392620, -- Flask of Crimson Tears +8 (Full)
    [1018] = true, -- Flask of Crimson Tears +9 (Empty)
    [1019] = 392620, -- Flask of Crimson Tears +9 (Full)
    [1020] = true, -- Flask of Crimson Tears +10 (Empty)
    [1021] = 392620, -- Flask of Crimson Tears +10 (Full)
    [1022] = true, -- Flask of Crimson Tears +11 (Empty)
    [1023] = 392620, -- Flask of Crimson Tears +11 (Full)
    [1024] = true, -- Flask of Crimson Tears +12 (Empty)
    [1025] = 392620, -- Flask of Crimson Tears +12 (Full)
    [1050] = true, -- Flask of Cerulean Tears (Empty)
    [1051] = 392630, -- Flask of Cerulean Tears (Full)
    [1052] = true, -- Flask of Cerulean Tears +1 (Empty)
    [1053] = 392630, -- Flask of Cerulean Tears +1 (Full)
    [1054] = true, -- Flask of Cerulean Tears +2 (Empty)
    [1055] = 392630, -- Flask of Cerulean Tears +2 (Full)
    [1056] = true, -- Flask of Cerulean Tears +3 (Empty)
    [1057] = 392630, -- Flask of Cerulean Tears +3 (Full)
    [1058] = true, -- Flask of Cerulean Tears +4 (Empty)
    [1059] = 392630, -- Flask of Cerulean Tears +4 (Full)
    [1060] = true, -- Flask of Cerulean Tears +5 (Empty)
    [1061] = 392630, -- Flask of Cerulean Tears +5 (Full)
    [1062] = true, -- Flask of Cerulean Tears +6 (Empty)
    [1063] = 392630, -- Flask of Cerulean Tears +6 (Full)
    [1064] = true, -- Flask of Cerulean Tears +7 (Empty)
    [1065] = 392630, -- Flask of Cerulean Tears +7 (Full)
    [1066] = true, -- Flask of Cerulean Tears +8 (Empty)
    [1067] = 392630, -- Flask of Cerulean Tears +8 (Full)
    [1068] = true, -- Flask of Cerulean Tears +9 (Empty)
    [1069] = 392630, -- Flask of Cerulean Tears +9 (Full)
    [1070] = true, -- Flask of Cerulean Tears +10 (Empty)
    [1071] = 392630, -- Flask of Cerulean Tears +10 (Full)
    [1072] = true, -- Flask of Cerulean Tears +11 (Empty)
    [1073] = 392630, -- Flask of Cerulean Tears +11 (Full)
    [1074] = true, -- Flask of Cerulean Tears +12 (Empty)
    [1075] = 392630, -- Flask of Cerulean Tears +12 (Full)
}
local trackedWeapons = {
    [18110000] = true, -- Guardian Swordspear (Sword)
    [18115000] = true, -- Guardian Swordspear (Spear)
    [8100000] = true, -- Morgoth's Cursed Sword (Great Curved Sword)
    [8105000] = true, -- Morgoth's Cursed Sword (Light Greatsword)
    [3250000] = true, -- Quality Greatsword (Greatsword)
    [3255000] = true, -- Quality Greatsword (Light Greatsword)
    [12540000] = true, -- Egg Mace (beeg)
    [12545000] = true, -- Egg Mace (small)
    [10200000] = true, -- Dragonkin Twinblade (Twinblade)
    [10205000] = true, -- Dragonkin Twinblade (Twin Swords)
    [11190000] = true, -- Tricia's Pomander (Fire)
    [11191000] = true, -- Tricia's Pomander (Lightning)
    [11192000] = true, -- Tricia's Pomander (Madness)
    [11193000] = true, -- Tricia's Pomander (Madness)
    [1200000] = true, -- Blades of the Prince (Daggers)
    [1205000] = true, -- Blades of the Prince (Throwing Daggers)
    [18200000] = true, -- Blightpole (Base)
    [18205000] = true, -- Blightpole (Catalyst)
}

local _items = {}
local _inventoryInitialized = false
local _highestIndexFound = 0
function InventoryManagerInit()
    GetInventoryItems(GAME_BASE.GAME_DATA_MAN.PLAYER_GAME_INFO.STORAGE_INVENTORY)
    _inventoryInitialized = true
end

function IsInventoryInitialized()
    return _inventoryInitialized
end

local _index = 0
local _isInCycle = false
function CycleGetInventoryItems(storageType)
    if not _inventoryInitialized or _isInCycle then
        return
    end

    _isInCycle = true
    local tempIndex = _index

    while true do
        if tempIndex > _index + 1 then
            break
        elseif tempIndex > 2566 then
            tempIndex = 0
            break
        end

        local item = GetInventoryItem(storageType, tempIndex)
        if item == nil then
            tempIndex = 0
            break
        end
        
        tempIndex = tempIndex + 1
        -- We only care about saving weapons for now so we don't bloat the array with other items
        -- Hopefully increases performance by having a smaller array
        if item.GaItemHandle ~= nil then
            _items[item.GaItemHandle] = item
        end
    end
    _index = tempIndex
    _isInCycle = false
end

function TryGetAnyItem(category, idMap)
    if not _inventoryInitialized then
        return false, nil
    end

    for _, item in pairs(_items) do
        if item.Category == category and idMap[item.Id] then
            return true, item
        end
    end
    return false, nil
end

function TryGetItemByGaItemHandle(handle)
    if not _inventoryInitialized then
        return false, nil
    end

    local item = _items[handle]
    if item ~= nil and item.GaItemHandle == handle then
        return true, item
    end

    return false, nil
end

function GetInventoryItems(storageType, isKey)
    if #_items > 0 or _inventoryInitialized then
        return _items
    end

    local items = {}
    local index = 0
    local size = storageType.MAX_SIZE(isKey)

    while true do
        if index > size then
            break
        end

        local item = GetInventoryItem(storageType, index, isKey)
        if item == nil then
            break
        end

        -- We only care about saving weapons for now so we don't bloat the array with other items
        -- Hopefully increases performance by having a smaller array
        if item.GaItemHandle ~= nil then
            items[item.GaItemHandle] = item
        end
        index = index + 1
    end
    _items = items
    return items
end

function GetInventoryItem(storageType, index, isKey)
    local fullItemId = GetPointerValue(storageType.FULL_ITEM_ID(index, isKey))
    if tonumber(fullItemId) == -1 then -- int max which is the default if the item slot is empty
        return nil
    end
    
    _highestIndexFound = math.max(_highestIndexFound, index)

    local itemCategory, itemId = extractBits32String(fullItemId)
    if not (itemCategory == ITEMCATEGORY_ID.Goods and trackedGoods[itemId] ~= nil)
    and not (itemCategory == ITEMCATEGORY_ID.Weapon and trackedWeapons[itemId - (itemId % 100)]) then
        return { }
    end

    --local quantity = GetPointerValue(storageType.QUANTITY(index, isKey))
    local gaItemHandle = GetPointerValue(storageType.GA_ITEM_HANDLE(index, isKey))

    return {
        Id = itemId,
        Category = tonumber(itemCategory),
        --Quantity = tonumber(quantity),
        Index = index,
        GaItemHandle = gaItemHandle,
    }
end

function UpdateSingleItem(item)
    _items[item.GaItemHandle] = item
end

function ParseGaItemHandle(handle)
    local bin = decToBinaryString(handle)
    local category = tonumber(bin:sub(1, 4), 2) % 8
    local selector = tonumber(bin:sub(5, 28), 2)
    local index = tonumber(bin:sub(17, 32), 2)
    return selector, index, category
end

function GetGaItemByHandle(handle)
    local _, index, category = ParseGaItemHandle(handle)
    if category ~= 0 and category ~= 4 then
        return nil
    end

    local itemId = GetPointerValue(GAME_BASE.CS_GA_ITEM.GA_ITEMS.ITEM_ID(index))
    if itemId == nil then
        return nil
    end
    local _, id = extractBits32String(itemId)

    local gemGaItemHandle = nil
    if category == ITEMCATEGORY_ID.Weapon then
        gemGaItemHandle = GetPointerValue(GAME_BASE.CS_GA_ITEM.GA_ITEMS.GEM_GA_ITEM_HANDLE(index))
    end

    return {
        Id = id,
        Category = category,
        GemGaItemHandle = gemGaItemHandle,
    }
end

function InventoryUpdateRequested()
    if env(GetSpEffectID, 101401) == FALSE then
        return
    end
    act(ClearSpEffect, 101401)

    if not _inventoryItialized then
        return
    end

    local index = _highestIndexFound + 1

    while true do
        local newItem = GetInventoryItem(GAME_BASE.GAME_DATA_MAN.PLAYER_GAME_INFO.STORAGE_INVENTORY, index)
        if newItem == nil then break end

        if newItem.GaItemHandle ~= nil then
            _items[newItem.GaItemHandle] = newItem
        end
        index = index + 1
    end
end

function InventoryUpdateRequestedExistingItem()
    if env(GetSpEffectID, 101402) == FALSE then
        return
    end
    act(ClearSpEffect, 101402)

    if not _inventoryItialized then
        return
    end

    for _, item in pairs(_items) do
        local goodsSpEffect = trackedGoods[item.Id] -- Mainly useful for prisoner jewel
        if goodsSpEffect ~= nil and goodsSpEffect ~= true and env(GetSpEffectID, goodsSpEffect) == TRUE then
            local updatedItem = GetInventoryItem(GAME_BASE.GAME_DATA_MAN.PLAYER_GAME_INFO.STORAGE_INVENTORY, item.Index)
            _items[item.GaItemHandle] = updatedItem
        end
    end
end