--[[
	Author: Dennis Werner Garske (DWG) / brian / Mewtiny
	License: MIT License
]]
local _G = _G or getfenv(0)
local CleveRoids = _G.CleveRoids or {}

-- PERFORMANCE: Upvalues for frequently called functions
local GetTime = GetTime
local GetContainerItemLink = GetContainerItemLink
local GetContainerItemInfo = GetContainerItemInfo
local GetContainerNumSlots = GetContainerNumSlots
local GetInventoryItemLink = GetInventoryItemLink
local GetInventoryItemTexture = GetInventoryItemTexture
local GetInventoryItemCount = GetInventoryItemCount
local GetItemInfo = GetItemInfo
local GetSpellInfo = GetSpellInfo
local tonumber = tonumber
local type = type
local pairs = pairs
local string_find = string.find
local string_lower = string.lower
local string_gsub = string.gsub
local table_insert = table.insert
local table_getn = table.getn

-- PERFORMANCE: Extract item name directly from link without GetItemInfo call
-- Link format: |cFFFFFFFF|Hitem:12345:0:0:0|h[Item Name]|h|r
local function GetNameFromLink(link)
    if not link then return nil end
    local _, _, name = string_find(link, "|h%[(.-)%]|h")
    return name
end

-- Indexes all spells the current player and pet knows
function CleveRoids.IndexSpells()
    local spells = {}
    local i = 0
    local book = 1
    local bookType = CleveRoids.bookTypes[book]
    local maxBooks = table.getn(CleveRoids.bookTypes)

    spells[bookType] = {}
    while true do
        i = i + 1

        -- ClassicAPI GetSpellInfo(slot, bookType) returns the spellID as the
        -- 10th value, giving us slot -> spellID natively (plus name/rank/icon
        -- in one call, replacing GetSpellName + GetSpellTexture).
        local spellName, spellRank, texture, _, _, _, _, _, _, spellId = GetSpellInfo(i, bookType)
        if not spellName then
            i = 0
            book = book + 1
            if book > maxBooks then
                break
            end

            bookType = CleveRoids.bookTypes[book]
            spells[bookType] = {}
        else
            local cost, reagent, reagentId = CleveRoids.GetSpellCost(i, bookType, spellId)
            if not spells[bookType][spellName] then
                spells[bookType][spellName] = {
                    spellSlot = i,
                    id = spellId,
                    name = spellName,
                    bookType = bookType,
                    texture = texture,
                    cost = cost,
                    reagentId = reagentId,
                }
            end
            if spellRank and not spells[bookType][spellName][spellRank] then
                spells[bookType][spellName][spellRank] = {
                    spellSlot = i,
                    id = spellId,
                    name = spellName,
                    rank = spellRank,
                    bookType = bookType,
                    texture = texture,
                    cost = cost,
                    reagentId = reagentId,
                }
                spells[bookType][spellName].highest = spells[bookType][spellName][spellRank]
            end
            -- For spells with no rank string, the base entry is the highest
            if not spellRank and not spells[bookType][spellName].highest then
                spells[bookType][spellName].highest = spells[bookType][spellName]
            end

            if reagent then
                CleveRoids.countedItemTypes[reagent] = true
            elseif reagentId and Item then
                Item:CreateFromItemID(reagentId):ContinueOnItemLoad(function()
                    local loadedName = C_Item.GetItemNameByID(reagentId)
                    if loadedName and loadedName ~= "" then
                        CleveRoids.countedItemTypes[loadedName] = true
                    end
                end)
            end
        end
    end

    CleveRoids.Spells = spells
end

-- Indexes all pet spells and their action bar slots
function CleveRoids.IndexPetSpells()
    local petSpells = {}

    if not UnitExists("pet") then
        CleveRoids.PetSpells = petSpells
        return
    end

    for i = 1, NUM_PET_ACTION_SLOTS do
        local name, subtext, texture, isToken = GetPetActionInfo(i)

        if name and not isToken then
            -- Store the spell name and its slot
            petSpells[name] = {
                slot = i,
                name = name,
                subtext = subtext,
                texture = texture
            }
        end
    end

    CleveRoids.PetSpells = petSpells
end

-- Gets a pet spell by name
function CleveRoids.GetPetSpell(spellName)
    if not spellName or not CleveRoids.PetSpells then
        return nil
    end

    spellName = CleveRoids.Trim(spellName)
    return CleveRoids.PetSpells[spellName]
end

function CleveRoids.IndexTalents()
    local talents = {[1] = true}
    for tab = 1, GetNumTalentTabs()  do
        for i = 1, GetNumTalents(tab) do
            local name, _, _, _, rank = GetTalentInfo(tab, i)
            if name then
                talents[name] = tonumber(rank)
            end
        end
    end
    CleveRoids.Talents = talents
end


-- Lightweight equipment-only indexing for combat situations
-- Updates existing cache rather than rebuilding it
-- PERFORMANCE: Index a single equipment slot instead of all 20
-- Use when we know exactly which slot changed (e.g., from EquipBagItem or
-- PLAYER_EQUIPMENT_CHANGED). hasCurrent is the event's arg2 (does the slot now
-- hold an item); pass false to skip the API probe on a slot we know is empty.
function CleveRoids.IndexEquipSlot(inventoryID, hasCurrent)
    if not inventoryID then return end

    local items = CleveRoids.Items or {}

    -- Clear any stale inventoryID still pointing at this slot: the item that was
    -- here is now unequipped or swapped out (its real location comes from the
    -- paired BAG_UPDATE rebuild). Equip changes are user-paced, so this table
    -- scan is off the hot path.
    for _, entry in pairs(items) do
        if type(entry) == "table" and entry.inventoryID == inventoryID then
            entry.inventoryID = nil
        end
    end

    -- hasCurrent == false (arg2) => slot is now empty, nothing to add.
    local itemID = hasCurrent ~= false and GetInventoryItemID("player", inventoryID)
    if itemID then
        local name, itemLink, _, _, itemType, itemSubType, _, _, texture = GetItemInfo(itemID)
        if name then
            local count = GetInventoryItemCount("player", inventoryID)
            if not items[name] then
                items[name] = {
                    inventoryID = inventoryID,
                    id = itemID,
                    name = name,
                    count = count,
                    texture = texture,
                    link = itemLink,
                }
                items[itemID] = name
                local lowerName = string.lower(name)
                if lowerName ~= name then
                    items[lowerName] = name
                end
            else
                items[name].inventoryID = inventoryID
                items[name].count = count
            end
        end
    end

    CleveRoids.lastGetItem = nil
    CleveRoids.Items = items
end


-- PERFORMANCE: Persistent cache for GetItemInfo results (survives between IndexItems calls)
-- This prevents repeated GetItemInfo calls for the same itemID
local _itemInfoCache = {}
local _itemInfoCacheSize = 0
local _ITEM_INFO_CACHE_MAX = 500  -- Limit cache size

local function GetCachedItemInfo(itemID)
    local cached = _itemInfoCache[itemID]
    if cached then
        return cached.name, cached.link, cached.quality, cached.level, cached.type, cached.subType, cached.stackCount, cached.equipLoc, cached.texture
    end

    local name, link, quality, level, itemType, subType, stackCount, equipLoc, texture = GetItemInfo(itemID)
    if name then
        -- Cache the result
        if _itemInfoCacheSize < _ITEM_INFO_CACHE_MAX then
            _itemInfoCache[itemID] = {
                name = name, link = link, quality = quality, level = level,
                type = itemType, subType = subType, stackCount = stackCount,
                equipLoc = equipLoc, texture = texture
            }
            _itemInfoCacheSize = _itemInfoCacheSize + 1
        end
    end
    return name, link, quality, level, itemType, subType, stackCount, equipLoc, texture
end

function CleveRoids.IndexItems()
    local items = {}
    local NUM_BAG_SLOTS = NUM_BAG_SLOTS  -- Upvalue for bag constant

    -- Rebuilt each pass: itemIDs the player owns that GetItemInfo couldn't
    -- resolve yet (cold cache under ClassicAPI's async warmup). The
    -- GET_ITEM_INFO_RECEIVED handler consults this so it only re-indexes for
    -- our own uncached items and ignores the flood of unrelated fills (quest
    -- DB scans, AH, chat-link hovers, inspects) in O(1).
    local pendingItemInfo = {}
    CleveRoids.pendingItemInfo = pendingItemInfo

    -- PERFORMANCE: Local function references
    local GetContainerNumSlots = GetContainerNumSlots
    local GetContainerItemInfo = GetContainerItemInfo
    local GetInventoryItemCount = GetInventoryItemCount

    -- Scan bags (reverse order to prefer first stack)
    for bagID = 0, NUM_BAG_SLOTS do
        local numSlots = GetContainerNumSlots(bagID)
        for slot = numSlots, 1, -1 do
            local itemID = C_Container.GetContainerItemID(bagID, slot)
            if itemID then
                -- Decorated name for the duplicate fast-path (no link string built)
                local linkName = C_Item.GetItemName({ bagID = bagID, slotIndex = slot })
                local existing = linkName and items[linkName]

                if existing then
                    -- Item already seen - just update count and add bag slot (skip GetItemInfo)
                    local _, count = GetContainerItemInfo(bagID, slot)
                    existing.count = (existing.count or 0) + (count or 0)
                    table_insert(existing.bagSlots, {bagID, slot})
                else
                    -- New item - need full info
                    local name, itemLink, _, _, itemType, itemSubType, _, _, texture = GetCachedItemInfo(itemID)

                    if name then
                        local _, count = GetContainerItemInfo(bagID, slot)
                        items[name] = {
                            bagID = bagID,
                            slot = slot,
                            id = itemID,
                            name = name,
                            type = itemType,
                            count = count,
                            texture = texture,
                            link = itemLink,
                            bagSlots = {{bagID, slot}},
                            slotsIndex = 1,
                        }
                        items[itemID] = name
                        local lowerName = string_lower(name)
                        if lowerName ~= name then
                            items[lowerName] = name
                        end
                    else
                        -- Owned but not cached yet; wait for GET_ITEM_INFO_RECEIVED.
                        pendingItemInfo[itemID] = true
                    end
                end
            end
        end
    end

    -- Scan equipped items
    for inventoryID = 1, 19 do
        local itemID = GetInventoryItemID("player", inventoryID)
        if itemID then
            -- Decorated name for the duplicate fast-path (no link string built)
            local linkName = C_Item.GetItemName({ equipmentSlotIndex = inventoryID })
            local existing = linkName and items[linkName]

            if existing then
                -- Item in bags AND equipped - update existing entry
                existing.inventoryID = inventoryID
                local count = GetInventoryItemCount("player", inventoryID)
                existing.count = (existing.count or 0) + (count or 0)
            else
                -- New equipped-only item
                local name, itemLink, _, _, itemType, itemSubType, _, _, texture = GetCachedItemInfo(itemID)
                if name then
                    local count = GetInventoryItemCount("player", inventoryID)
                    items[name] = {
                        inventoryID = inventoryID,
                        id = itemID,
                        name = name,
                        count = count,
                        texture = texture,
                        link = itemLink,
                    }
                    items[itemID] = name
                    local lowerName = string_lower(name)
                    if lowerName ~= name then
                        items[lowerName] = name
                    end
                else
                    -- Owned but not cached yet; wait for GET_ITEM_INFO_RECEIVED.
                    pendingItemInfo[itemID] = true
                end
            end
        end
    end

    CleveRoids.lastGetItem = nil
    CleveRoids.Items = items

    -- relink an item action to the item if it wasn't in inventory/bags before
    for slot, actions in CleveRoids.Actions do
        for i, action in actions.list do
            if action.item then
                action.item = CleveRoids.GetItem(action.action)
            end
        end
    end
end

function CleveRoids.ClearSlot(slots, slot)
    if slots[slot] then
        slots[slots[slot]] = nil
    end
    slots[slot] = nil
end

-- Map a 1-based action slot to (actionType, id, name, rank) via ClassicAPI's
-- GetActionInfo, resolving spell/item/macro names from the id. actionType is
-- "SPELL" | "ITEM" | "MACRO" to match existing callers; returns nil for an
-- empty slot. Bag-instance items (no itemID from GetActionInfo) yield no name.
function CleveRoids.GetActionButtonInfo(slot)
    local actionType, id = CleveRoids.ClassicAPI.GetActionInfo(slot)
    if not actionType then return end

    if actionType == "spell" and id then
        local rank = C_Spell.GetSpellSubtext(id)
        if rank == "" then rank = nil end
        return "SPELL", id, C_Spell.GetSpellName(id), rank
    elseif actionType == "item" and id then
        local item = CleveRoids.GetItem(id)
        return "ITEM", id, (item and item.name)
    elseif actionType == "macro" and id then
        return "MACRO", id, GetMacroInfo(id)
    end
end

function CleveRoids.IndexActionSlot(slot)
    if not HasAction(slot) then
        CleveRoids.Actions[slot] = nil
        -- When clearing a reactive slot, check if we need to find it elsewhere
        local clearedReactiveName = CleveRoids.reactiveSlots[slot]
        CleveRoids.ClearSlot(CleveRoids.reactiveSlots, slot)
        CleveRoids.ClearSlot(CleveRoids.actionSlots, slot)

        -- If we cleared a reactive spell, rescan to find it in another slot
        if clearedReactiveName then
            for i = 1, 120 do
                if i ~= slot and HasAction(i) then
                    local _, _, scanName = CleveRoids.GetActionButtonInfo(i)
                    if scanName == clearedReactiveName then
                        CleveRoids.reactiveSlots[clearedReactiveName] = i
                        CleveRoids.reactiveSlots[i] = clearedReactiveName
                        break
                    end
                end
            end
        end
    else
        local actionType, _, name, rank = CleveRoids.GetActionButtonInfo(slot)
        if name then
            local reactiveName = CleveRoids.reactiveSpells[name] and name
            local actionSlotName = name..(rank and ("("..rank..")") or "")
            if reactiveName then
                -- Always update the mapping to ensure we track the correct slot
                -- Clear old mapping for this spell name first
                local oldSlot = CleveRoids.reactiveSlots[reactiveName]
                if oldSlot and oldSlot ~= slot then
                    CleveRoids.reactiveSlots[oldSlot] = nil
                end
                CleveRoids.reactiveSlots[reactiveName] = slot
                CleveRoids.reactiveSlots[slot] = reactiveName
            elseif not reactiveName then
                CleveRoids.ClearSlot(CleveRoids.reactiveSlots, slot)
            end
            if actionType == "SPELL" or actionType == "ITEM" then
                if not CleveRoids.actionSlots[actionSlotName] then
                    CleveRoids.actionSlots[actionSlotName] = slot
                    CleveRoids.actionSlots[slot] = actionSlotName
                end
            end
        end
    end
    local actions = CleveRoids.GetAction(slot)
    CleveRoids.TestForActiveAction(actions)
    CleveRoids.PublishDisplay(actions)
    CleveRoids.SendEventForAction(slot, "ACTIONBAR_SLOT_CHANGED", slot)
end

function CleveRoids.IndexActionBars()
    for i = 1, 120 do
        CleveRoids.IndexActionSlot(i)
    end
end

function CleveRoids.GetSpell(text)
    text = CleveRoids.Trim(text)

    -- Explicit "spell:<id>" form. If the player knows the spell, reuse its cached
    -- spellbook entry (full cost/cooldown/usability). FindSpellBookSlotByID
    -- (ClassicAPI) resolves per-rank IDs and pet spells natively and returns the
    -- same bookType string CleveRoids.Spells is keyed by. If the spell is not in
    -- either book, fall back to an id-only entry that SetAction renders via
    -- SetSpellByID; cost=0 keeps the downstream active-action checks nil-safe.
    local _, _, spellId = string.find(text, "^spell:(%d+)$")
    if spellId then
        spellId = tonumber(spellId)
        local slot, book = FindSpellBookSlotByID(spellId)
        if slot then
            local name, rank = GetSpellInfo(slot, book)
            local byName = name and CleveRoids.Spells[book] and CleveRoids.Spells[book][name]
            if byName then
                return (rank and rank ~= "" and byName[rank]) or byName.highest or byName
            end
        end
        return { id = spellId, texture = C_Spell.GetSpellTexture(spellId) or CleveRoids.unknownTexture, cost = 0 }
    end

    local rs, _, rank = string.find(text, "[^%s]%((Rank %d+)%)$")
    local name = rank and string.sub(text, 1, rs) or text

    for book, spells in CleveRoids.Spells do
        if spells and spells[name] then
            local entry = spells[name][rank or "highest"]
            if entry then return entry end
            -- Fallback: for spells with no rank, return base entry
            if not rank and spells[name].spellSlot then
                return spells[name]
            end
        end
    end
end

function CleveRoids.GetTalent(text)
    text = CleveRoids.Trim(text)
    return CleveRoids.Talents[text]
end

-- PERFORMANCE: Helper functions defined once (not inline per-call)
local function makeInventoryItem(inventoryID, link, Items)
    if not link then link = GetInventoryItemLink("player", inventoryID) end
    if not link then return end

    local itemID = GetInventoryItemID("player", inventoryID)
    local name = C_Item.GetItemName({ equipmentSlotIndex = inventoryID })
    local texture = GetInventoryItemTexture("player", inventoryID)
    local count = GetInventoryItemCount("player", inventoryID)

    local it = {
        inventoryID = inventoryID,
        id = itemID,
        name = name,
        texture = texture,
        link = link,
        count = count
    }
    if name then
        Items[name] = it
        local lowerName = string_lower(name)
        if lowerName ~= name then
            Items[lowerName] = name
        end
    end
    if itemID then Items[itemID] = name end
    return it
end

local function makeBagItem(bagID, slot, link, Items)
    if not link then
        link = GetContainerItemLink(bagID, slot)
    end
    if not link then return end

    local itemID = C_Container.GetContainerItemID(bagID, slot)

    local name = C_Item.GetItemName({bagID = bagID, slotIndex = slot})
    local count = 0
    local texture, itemCount = GetContainerItemInfo(bagID, slot)
    if itemCount then count = itemCount end

    local it = {
        bagID = bagID,
        slot = slot,
        id = itemID,
        name = name,
        texture = texture,
        link = link,
        count = count,
        bagSlots = { { bagID, slot } },
        slotsIndex = 1
    }
    if name then
        Items[name] = it
        local lowerName = string_lower(name)
        if lowerName ~= name then
            Items[lowerName] = name
        end
    end
    if itemID then Items[itemID] = name end
    return it
end

function CleveRoids.GetItem(text)
    if not text or text == "" then return end

    -- Explicit "item:<id>" form: force resolution by item ID. Reuses the numeric
    -- lookup below (equipped -> bags -> GetItemInfo), so location-aware tooltip
    -- rendering (SetInventoryItem/SetBagItem) still applies when the player has it.
    local _, _, prefixedId = string.find(text, "^item:(%d+)$")
    if prefixedId then text = prefixedId end

    local Items = CleveRoids.Items
    local item = Items[text] or Items[tostring(text)]
    if not item then
        local lowerText = string_lower(text)
        local canonicalName = Items[lowerText]
        if canonicalName and type(canonicalName) == "string" then
            item = Items[canonicalName]
        end
    end

    if item then
        if type(item) == "table" then
            return item
        else
            return Items[tostring(item)]
        end
    end

    local qid = tonumber(text)
    local qname = (type(text) == "string") and string_lower(text) or nil

    -- Direct inventory slot lookup by ID
    if qid and qid >= 1 and qid <= 19 then
        local it = makeInventoryItem(qid, nil, Items)
        if it then return it end
    end

    -- Scan equipped items
    for inv = 1, 19 do
        local link = GetInventoryItemLink("player", inv)
        if link then
            local itemID = GetInventoryItemID("player", inv)
            if qid and itemID and qid == itemID then
                return makeInventoryItem(inv, link, Items)
            elseif qname then
                -- PERFORMANCE: Extract name from link directly instead of GetItemInfo
                local nm = GetNameFromLink(link)
                if nm and string_lower(nm) == qname then
                    return makeInventoryItem(inv, link, Items)
                end
            end
        end
    end

    -- Scan bags
    for bag = 0, 4 do
        local slots = GetContainerNumSlots(bag) or 0
        for slot = 1, slots do
            local link = GetContainerItemLink(bag, slot)
            if link then
                local itemID =  C_Container.GetContainerItemID(bag, slot)
                if qid and itemID and qid == itemID then
                    return makeBagItem(bag, slot, link, Items)
                elseif qname then
                    -- PERFORMANCE: Extract name from link directly instead of GetItemInfo
                    local nm = GetNameFromLink(link)
                    if nm and string_lower(nm) == qname then
                        return makeBagItem(bag, slot, link, Items)
                    end
                end
            end
        end
    end

    local name, link, _, _, _, _, _, _, texture = GetItemInfo(text)
    if not name then return end
    local fallback = { id = text, name = name, link = link, texture = texture }
    CleveRoids.Items[name] = fallback
    local lowerName = string.lower(name)
    if lowerName ~= name then
        CleveRoids.Items[lowerName] = name
    end
    return fallback
end

function CleveRoids.GetNextBagSlotForUse(item, text)
    if not item then return end

    -- PERFORMANCE: Compare item directly instead of calling GetItem(text) again
    if CleveRoids.lastGetItem == item then
        if item.bagSlots and table.getn(item.bagSlots) > item.slotsIndex then
            item.slotsIndex = item.slotsIndex + 1
            item.bagID, item.slot = unpack(item.bagSlots[item.slotsIndex])
        end
    end

    CleveRoids.lastGetItem = item
    return item
end

--------------------------------------------------------------------------------
-- FAST ITEM LOOKUP (avoids full bag scan)
--------------------------------------------------------------------------------

-- PERFORMANCE: Fast item lookup by name only - no full scan fallback
-- Returns item table or nil. Does NOT trigger IndexItems().
-- Use this for equipment swapping where we know the exact item name.
function CleveRoids.GetItemFast(text)
    if not text or text == "" then return nil end

    local Items = CleveRoids.Items
    if not Items then return nil end

    -- Direct cache lookup
    local item = Items[text]
    if item and type(item) == "table" then
        return item
    end

    -- Try lowercase
    local lowerText = string_lower(text)
    local canonicalName = Items[lowerText]
    if canonicalName and type(canonicalName) == "string" then
        item = Items[canonicalName]
        if item and type(item) == "table" then
            return item
        end
    end

    -- Try as item ID
    local itemId = tonumber(text)
    if itemId then
        local name = Items[itemId]
        if name and type(name) == "string" then
            item = Items[name]
            if item and type(item) == "table" then
                return item
            end
        end
    end

    return nil
end

-- PERFORMANCE: Quick scan for a single item by name (doesn't update full cache)
-- Only scans until item is found, then stops.
-- Optimized: extracts name from link directly instead of calling GetItemInfo.
-- Uses cache with VALIDATION - checks if item is actually at cached location before trusting it.
-- v2.18+: Uses native FindPlayerItemSlot for O(1) lookup when available.
function CleveRoids.FindItemQuick(text)
    if not text or text == "" then return nil end

    -- v2.18+: Try native fast lookup first (much faster than Lua scanning)
    local API = CleveRoids.NampowerAPI
    if API and API.features and API.features.hasFindPlayerItemSlot then
        local itemInfo = API.FindItemFast(text)
        if itemInfo then
            -- Update cache with the found item for future lookups
            local Items = CleveRoids.Items or {}
            if itemInfo.name then
                Items[itemInfo.name] = itemInfo
                Items[string_lower(itemInfo.name)] = itemInfo.name
                if itemInfo.itemId then
                    Items[itemInfo.itemId] = itemInfo.name
                end
            end
            return itemInfo
        end
        -- Item not found via native lookup - no need to scan
        return nil
    end

    -- Fallback: no v2.18 API, use existing cache + scan logic
    local Items = CleveRoids.Items or {}
    local qid = tonumber(text)
    -- Only compute lowercase name if we're NOT searching by ID
    local qname = (not qid) and string_lower(text) or nil

    -- Try cache first, but VALIDATE the cached location is still correct
    local cached = CleveRoids.GetItemFast(text)
    if cached then
        -- Validate: check if item is actually at the cached location
        if cached.inventoryID then
            if qid then
                if GetInventoryItemID("player", cached.inventoryID) == qid then
                    cached._validated = true
                    return cached  -- Cache is valid
                end
            else
                local nm = C_Item.GetItemName({ equipmentSlotIndex = cached.inventoryID })
                if nm and qname and string_lower(nm) == qname then
                    cached._validated = true
                    return cached  -- Cache is valid
                end
            end
            -- Cache is stale - item not at cached equipped slot, invalidate
            if cached.name then
                Items[cached.name] = nil
                Items[string_lower(cached.name)] = nil
            end
        elseif cached.bagID and cached.slot then
            if qid then
                if C_Container.GetContainerItemID(cached.bagID, cached.slot) == qid then
                    cached._validated = true
                    return cached  -- Cache is valid
                end
            else
                local nm = C_Item.GetItemName({ bagID = cached.bagID, slotIndex = cached.slot })
                if nm and qname and string_lower(nm) == qname then
                    cached._validated = true
                    return cached  -- Cache is valid
                end
            end
            -- Cache is stale - item not at cached bag slot, invalidate
            if cached.name then
                Items[cached.name] = nil
                Items[string_lower(cached.name)] = nil
            end
        end
    end

    -- Cache miss or stale - do a fresh scan
    -- Quick scan equipped items first (only 19 slots)
    for inv = 1, 19 do
        local link = GetInventoryItemLink("player", inv)
        if link then
            local itemID = GetInventoryItemID("player", inv)
            -- ID match: fast path
            if qid and qid == itemID then
                return makeInventoryItem(inv, link, Items)
            end
            -- Name match: extract name from link (faster than GetItemInfo)
            if qname then
                local nm = GetNameFromLink(link)
                if nm and string_lower(nm) == qname then
                    return makeInventoryItem(inv, link, Items)
                end
            end
        end
    end

    -- Quick scan bags - stop as soon as found
    for bag = 0, 4 do
        local slots = GetContainerNumSlots(bag) or 0
        for slot = 1, slots do
            local link = GetContainerItemLink(bag, slot)
            if link then
                local itemID = C_Container.GetContainerItemID(bag, slot)
                -- ID match: fast path
                if qid and qid == itemID then
                    return makeBagItem(bag, slot, link, Items)
                end
                -- Name match: extract name from link (faster than GetItemInfo)
                if qname then
                    local nm = GetNameFromLink(link)
                    if nm and string_lower(nm) == qname then
                        return makeBagItem(bag, slot, link, Items)
                    end
                end
            end
        end
    end

    return nil
end

-- PERFORMANCE: Check if item is already equipped in slot (fast path)
-- Returns true if the item (by name or ID) is already in the specified slot
function CleveRoids.IsItemEquipped(text, inventoryId)
    if not text or not inventoryId then return false end

    local currentID = GetInventoryItemID("player", inventoryId)
    if not currentID then return false end

    -- Check by ID (fast path)
    local textId = tonumber(text)
    if textId and textId == currentID then
        return true
    end

    -- Check by name (decorated, so suffixed gear still matches)
    local currentName = C_Item.GetItemName({ equipmentSlotIndex = inventoryId })
    if currentName and string_lower(currentName) == string_lower(text) then
        return true
    end

    return false
end

local Extension = CleveRoids.RegisterExtension("Generic_show")
Extension.RegisterEvent("SPELLS_CHANGED", "SPELLS_CHANGED")

function Extension.OnLoad()
end

function Extension.SPELLS_CHANGED()
end