local shop = {}

local textbox = require "action.textbox"

local input = require "util.input"
local memory = require "util.memory"
local menu = require "util.menu"
local player = require "util.player"

local inventory = require "storage.inventory"

function shop.transaction(options)
	local item, itemMenu, menuIdx, quantityMenu
	if options.sell then
		menuIdx = 1
		itemMenu = 29
		quantityMenu = 158
		for i,sit in ipairs(options.sell) do
			local idx = inventory.indexOf(sit.name)
			if idx ~= -1 then
				item = sit
				item.index = idx
				item.amount = inventory.count(sit.name)
				break
			end
		end
	end
	if not item and options.buy then
		menuIdx = 0
		itemMenu = 123
		quantityMenu = 161
		for i,bit in ipairs(options.buy) do
			local needed = (bit.amount or 1) - inventory.count(bit.name)
			if needed > 0 then
				item = bit
				item.amount = needed
				break
			end
		end
	end
	if not item then
		if not textbox.isActive() then
			return true
		end
		input.press("B")
	elseif player.isFacing(options.direction or "Left") then
		if textbox.isActive() then
			if menu.isCurrently(32, "shop") then
				menu.select(menuIdx, true, false, "shop")
			elseif menu.getCol() == 15 then
				input.press("A")
			elseif menu.isCurrently(itemMenu, "transaction") then
				if menu.select(item.index, "accelerate", true, "transaction", true) then
					if menu.isCurrently(quantityMenu, "shop") then
						local currAmount = memory.value("shop", "transaction_amount")
						if menu.balance(currAmount, item.amount, false, 99, true) then
							input.press("A")
						end
					else
						input.press("A")
					end
				end
			else
				input.press("B")
			end
		else
			input.press("A", 2)
		end
	else
		player.interact(options.direction or "Left")
	end
	return false
end

function shop.vend(options)
	local item
	menuIdx = 0
	for i,bit in ipairs(options.buy) do
		local needed = (bit.amount or 1) - inventory.count(bit.name)
		if needed > 0 then
			item = bit
			item.buy = needed
			break
		end
	end
	if not item then
		if not textbox.isActive() then
			return true
		end
		input.press("B")
	elseif player.face(options.direction) then
		if textbox.isActive() then
			if memory.value("battle", "text") > 1 and memory.value("battle", "menu") ~= 95 then
				menu.select(item.index, true)
			else
				input.press("A")
			end
		else
			input.press("A", 2)
		end
	end
	return false
end

return shop