module 'info'

CreateFrame('GameTooltip', 'AuxTooltip', nil, 'GameTooltipTemplate')
AuxTooltip:SetScript('OnTooltipAddMoney', function()
	this.money = arg1
end)

do
	local inventory_index_map = {
		INVTYPE_AMMO = {0},
		INVTYPE_HEAD = {1},
		INVTYPE_NECK = {2},
		INVTYPE_SHOULDER = {3},
		INVTYPE_BODY = {4},
		INVTYPE_CHEST = {5},
		INVTYPE_ROBE = {5},
		INVTYPE_WAIST = {6},
		INVTYPE_LEGS = {7},
		INVTYPE_FEET = {8},
		INVTYPE_WRIST = {9},
		INVTYPE_HAND = {10},
		INVTYPE_FINGER = {11, 12},
		INVTYPE_TRINKET = {13, 14},
		INVTYPE_CLOAK = {15},
		INVTYPE_2HWEAPON = {16, 17},
		INVTYPE_WEAPONMAINHAND = {16, 17},
		INVTYPE_WEAPON = {16, 17},
		INVTYPE_WEAPONOFFHAND = {16, 17},
		INVTYPE_HOLDABLE = {16, 17},
		INVTYPE_SHIELD = {16, 17},
		INVTYPE_RANGED = {18},
		INVTYPE_RANGEDRIGHT = {18},
		INVTYPE_TABARD = {19},
	}
	function public.inventory_index(slot)
	    return unpack(inventory_index_map[slot] or tt)
	end
end

function public.container_item(bag, slot)
    for link in present(GetContainerItemLink(bag, slot)) do

        local item_id, suffix_id, unique_id, enchant_id = parse_link(link)
        local item_info = item(item_id, suffix_id, unique_id, enchant_id)

        local texture, count, locked, quality, readable, lootable = GetContainerItemInfo(bag, slot) -- quality not working?
        local tooltip, tooltip_money = tooltip(function(tooltip) tooltip:SetBagItem(bag, slot) end)
        local max_charges = max_item_charges(item_id)
        local charges = max_charges and item_charges(tooltip)
        local aux_quantity = charges or count
        return {
            item_id = item_id,
            suffix_id = suffix_id,
            unique_id = unique_id,
            enchant_id = enchant_id,

            link = link,
            itemstring = item_info.itemstring,
            item_key = item_id..':'..suffix_id,

            name = item_info.name,
            texture = texture,
            level = item_info.level,
            type = item_info.type,
            subtype = item_info.subtype,
            slot = item_info.slot,
            quality = item_info.quality,
            max_stack = item_info.max_stack,

            count = count,
            locked = locked,
            readable = readable,
            lootable = lootable,

            tooltip = tooltip,
    	    tooltip_money = tooltip_money,
            max_charges = max_charges,
            charges = charges,
            aux_quantity = aux_quantity,
        }
    end
end

function public.auction_sell_item()
	for name, texture, count, quality, usable, vendor_price in GetAuctionSellItemInfo do
        return {
			name = name,
			texture = texture,
            quality = quality,
			count = count,
			usable = usable,
            vendor_price = vendor_price, -- it seems for charge items this is always the price for full charges
		}
	end
end

function public.auction(index, query_type)
    query_type = query_type or 'list'

	for link in present(GetAuctionItemLink(query_type, index)) do
        local item_id, suffix_id, unique_id, enchant_id = parse_link(link)
        local item_info = item(item_id, suffix_id, unique_id, enchant_id)

        local name, texture, count, quality, usable, level, start_price, min_increment, buyout_price, high_bid, high_bidder, owner, sale_status = GetAuctionItemInfo(query_type, index)

    	local duration = GetAuctionItemTimeLeft(query_type, index)
        local tooltip, tooltip_money = tooltip(function(tooltip) tooltip:SetAuctionItem(query_type, index) end)
        local max_charges = max_item_charges(item_id)
        local charges = max_charges and item_charges(tooltip)
        local aux_quantity = charges or count
        local blizzard_bid = high_bid > 0 and high_bid or start_price
        local bid_price = high_bid > 0 and (high_bid + min_increment) or start_price

        return {
            item_id = item_id,
            suffix_id = suffix_id,
            unique_id = unique_id,
            enchant_id = enchant_id,

            link = link,
            itemstring = item_info.itemstring,
            item_key = item_id..':'..suffix_id,
            search_signature = join(temp-{item_id, suffix_id, enchant_id, start_price, buyout_price, bid_price, aux_quantity, duration, query_type == 'owner' and high_bidder or (high_bidder and 1 or 0), _g.aux_ignore_owner and (is_player(owner) and 0 or 1) or (owner or '?')}, ':'),
            sniping_signature = join(temp-{item_id, suffix_id, enchant_id, start_price, buyout_price, aux_quantity, _g.aux_ignore_owner and (is_player(owner, true) and 0 or 1) or (owner or '?')}, ':'),

            name = name,
            texture = texture,
            level = item_info.level,
            type = item_info.type,
            subtype = item_info.subtype,
            slot = item_info.slot,
            quality = quality,
            max_stack = item_info.max_stack,

            count = count,
            start_price = start_price,
            high_bid = high_bid,
            min_increment = min_increment,
            blizzard_bid = blizzard_bid,
            bid_price = bid_price,
            buyout_price = buyout_price,
            unit_blizzard_bid = blizzard_bid / aux_quantity,
            unit_bid_price = bid_price / aux_quantity,
            unit_buyout_price = buyout_price / aux_quantity,
            high_bidder = high_bidder,
            owner = owner,
            sale_status = sale_status,
            duration = duration,
            usable = usable,

            tooltip = tooltip,
    	    tooltip_money = tooltip_money,
            max_charges = max_charges,
            charges = charges,
            aux_quantity = aux_quantity,
        }
    end
end

function public.bid_update(auction_record)
    auction_record.high_bid = auction_record.bid_price
    auction_record.blizzard_bid = auction_record.bid_price
    auction_record.min_increment = min_bid_increment(auction_record.bid_price)
    auction_record.bid_price = auction_record.bid_price + auction_record.min_increment
    auction_record.unit_blizzard_bid = auction_record.blizzard_bid / auction_record.aux_quantity
    auction_record.unit_bid_price = auction_record.bid_price / auction_record.aux_quantity
    auction_record.high_bidder = 1
    auction_record.search_signature = join(temp-{auction_record.item_id, auction_record.suffix_id, auction_record.enchant_id, auction_record.start_price, auction_record.buyout_price, auction_record.bid_price, auction_record.aux_quantity, auction_record.duration, 1, _g.aux_ignore_owner and (is_player(auction_record.owner) and 0 or 1) or (auction_record.owner or '?')}, ':')
end

function public.set_tooltip(itemstring, owner, anchor)
    GameTooltip:SetOwner(owner, anchor)
    GameTooltip:SetHyperlink(itemstring)
end

function public.set_shopping_tooltip(slot)
    local index1, index2 = inventory_index(slot)
    local tooltips = tt
    if index1 then
        local tooltip = tooltip(function(tooltip) tooltip:SetInventoryItem('player', index1) end)
        if getn(tooltip) > 0 then
            tinsert(tooltips, tooltip)
        end
    end
    if index2 then
        local tooltip = tooltip(function(tooltip) tooltip:SetInventoryItem('player', index2) end)
        if getn(tooltip) > 0 then
            tinsert(tooltips, tooltip)
        end
    end

    if tooltips[1] then
        tinsert(tooltips[1], 1, -temp-object('left_text', 'Currently Equipped', 'left_color', -temp-list(.5, .5, .5)))
        ShoppingTooltip1:SetOwner(GameTooltip, 'ANCHOR_BOTTOMRIGHT')
        load_tooltip(ShoppingTooltip1, tooltips[1])
        ShoppingTooltip1:Show()
        ShoppingTooltip1:SetPoint('TOPLEFT', GameTooltip, 'TOPRIGHT', 0, -10)
    end

    if tooltips[2] then
        tinsert(tooltips[2], 1, -temp-object('left_text', 'Currently Equipped', 'left_color', -temp-list(.5, .5, .5)))
        ShoppingTooltip2:SetOwner(ShoppingTooltip1, 'ANCHOR_BOTTOMRIGHT')
        load_tooltip(ShoppingTooltip2, tooltips[2])
        ShoppingTooltip2:Show()
        ShoppingTooltip2:SetPoint('TOPLEFT', ShoppingTooltip1, 'TOPRIGHT')
    end
end

function public.tooltip_match(entry, tooltip)
    return any(tooltip, function(line)
        local left_match = line.left_text and strupper(line.left_text) == strupper(entry)
        local right_match = line.right_text and strupper(line.right_text) == strupper(entry)
        return left_match or right_match
    end)
end

function public.tooltip_find(pattern, tooltip)
    local count = 0
    for _, line in tooltip do
        if line.left_text and strfind(line.left_text, pattern) then
            count = count + 1
        end
        if line.right_text and strfind(line.right_text, pattern) then
            count = count + 1
        end
    end
    return count
end

function public.load_tooltip(frame, tooltip)
    frame:ClearLines()
    for _, line in tooltip do
        if line.right_text then
            frame:AddDoubleLine(line.left_text, line.right_text, line.left_color[1], line.left_color[2], line.left_color[3], line.right_color[1], line.right_color[2], line.right_color[3])
        else
            frame:AddLine(line.left_text, line.left_color[1], line.left_color[2], line.left_color[3], true)
        end
    end
    for i=1,getn(tooltip) do -- TODO why is this needed?
	    _g[frame:GetName()..'TextLeft'..i]:SetJustifyH('LEFT')
	    _g[frame:GetName()..'TextRight'..i]:SetJustifyH('LEFT')
    end
end

function public.display_name(item_id, no_brackets, no_color)
    for item_info in present(item(item_id)) do
        local name = item_info.name
        if not no_brackets then
            name = '['..name..']'
        end
        if not no_color then
            name = select(4, GetItemQualityColor(item_info.quality))..name..FONT_COLOR_CODE_CLOSE
        end
        return name
    end
end

function public.auctionable(tooltip, quality, lootable)
    local durability, max_durability = durability(tooltip)
    return not lootable
            and (not quality or quality < 6)
            and not tooltip_match(ITEM_BIND_ON_PICKUP, tooltip)
            and not tooltip_match(ITEM_BIND_QUEST, tooltip)
            and not tooltip_match(ITEM_SOULBOUND, tooltip)
            and (not tooltip_match(ITEM_CONJURED, tooltip) or tooltip_find(ITEM_MIN_LEVEL, tooltip) > 1)
            and not (durability and durability < max_durability)
end

function public.tooltip(setter)
    AuxTooltip:SetOwner(UIParent, 'ANCHOR_NONE')
    AuxTooltip.money = 0
    setter(AuxTooltip)
    AuxTooltip:Show()

    local tooltip = t
    for i=1,AuxTooltip:NumLines() do
        tinsert(tooltip, {
            left_text = _g['AuxTooltipTextLeft'..i]:GetText(),
            left_color = {_g['AuxTooltipTextLeft'..i]:GetTextColor()},
            right_text = _g['AuxTooltipTextRight'..i]:IsVisible() and _g['AuxTooltipTextRight'..i]:GetText(),
            right_color = {_g['AuxTooltipTextRight'..i]:GetTextColor()},
        })
    end

    return tooltip, AuxTooltip.money
end

function item_charges(tooltip)
	for _, line in tooltip do
        local pattern = '^'..gsub(gsub(ITEM_SPELL_CHARGES_P1, '%%d', '(%%d+)'), '%%%d+%$d', '(%%d+)')..'$'

        local _, _, left_charges_string = strfind(line.left_text or '', pattern)
        local _, _, right_charges_string = strfind(line.right_text or '', pattern)

        local charges = tonumber(left_charges_string) or tonumber(right_charges_string)
		if charges then
			return charges
		end
    end
    return 1
end

do
	local data = {
		-- wizard oil
		[20744] = 5,
		[20746] = 5,
		[20750] = 5,
		[20749] = 5,

		-- mana oil
		[20745] = 5,
		[20747] = 5,
		[20748] = 5,

		-- discombobulator
		[4388] = 5,

		-- recombobulator
		[4381] = 10,
		[18637] = 10,

		-- ... TODO
	}
	function public.max_item_charges(item_id)
	    return data[item_id]
	end
end

function public.durability(tooltip)
    for _, line in tooltip do
        local pattern = '^'..gsub(gsub(DURABILITY_TEMPLATE, '%%d', '(%%d+)'), '%%%d+%$d', '(%%d+)')..'$'
        local _, _, left_durability_string, left_max_durability_string = strfind(line.left_text or '', pattern)
        local _, _, right_durability_string, right_max_durability_string = strfind(line.right_text or '', pattern)
        local durability = tonumber(left_durability_string) or tonumber(right_durability_string)
        local max_durability = tonumber(left_max_durability_string) or tonumber(right_max_durability_string)
        if durability then
            return durability, max_durability
        end
    end
end

function public.item_key(link)
    local item_id, suffix_id = parse_link(link)
    return item_id..':'..suffix_id
end

function public.parse_link(link)
    local _, _, item_id, enchant_id, suffix_id, unique_id, name = strfind(link, '|c%x%x%x%x%x%x%x%x|Hitem:(%d*):(%d*):(%d*):(%d*)[:0-9]*|h%[(.-)%]|h|r')
    return tonumber(item_id) or 0, tonumber(suffix_id) or 0, tonumber(unique_id) or 0, tonumber(enchant_id) or 0, name
end

function public.itemstring(item_id, suffix_id, unique_id, enchant_id)
    return 'item:'..(item_id or 0)..':'..(enchant_id or 0)..':'..(suffix_id or 0)..':'..(unique_id or 0)
end

function public.item(item_id, suffix_id)
    local itemstring = 'item:'..(item_id or 0)..':0:'..(suffix_id or 0)..':0'
    local name, itemstring, quality, level, class, subclass, max_stack, slot, texture = GetItemInfo(itemstring)
    return name and {
        name = name,
        itemstring = itemstring,
        quality = quality,
        level = level,
        class = class,
        subclass = subclass,
        slot = slot,
        max_stack = max_stack,
        texture = texture,
    } or cache.item_info(item_id)
end

function public.item_class_index(item_class)
    for i, class in temp-{GetAuctionItemClasses()} do
        if strupper(class) == strupper(item_class) then
            return i, class
        end
    end
end

function public.item_subclass_index(class_index, item_subclass)
    for i, subclass in temp-{GetAuctionItemSubClasses(class_index)} do
        if strupper(subclass) == strupper(item_subclass) then
            return i, subclass
        end
    end
end

function public.item_slot_index(class_index, subclass_index, slot_name)
    for i, slot in temp-{GetAuctionInvTypes(class_index, subclass_index)} do
        if strupper(_g[slot]) == strupper(slot_name) then
            return i, _g[slot]
        end
    end
end

function public.item_quality_index(item_quality)
    for i=0,4 do
        local quality = _g['ITEM_QUALITY'..i..'_DESC']
        if strupper(item_quality) == strupper(quality) then
            return i, quality
        end
    end
end

function public.accessor.inventory()
	local bag, slot = 0, 0
	return function()
		if not GetBagName(bag) or slot >= GetContainerNumSlots(bag) then
			repeat bag = bag + 1 until GetBagName(bag) or bag > 4
			slot = 1
		else
			slot = slot + 1
		end
		if bag <= 4 then return {bag, slot}, bag_type(bag) end
	end
end

function public.bag_type(bag)
	if bag == 0 then return 1 end
	for link in present(GetInventoryItemLink('player', ContainerIDToInventoryID(bag))) do
		local item_id = parse_link(link)
		local item_info = item(item_id)
		return item_subclass_index(3, item_info.subclass)
	end
end