local Milo  = require('milo')
local Tasks = require('milo.taskRunner')
local UI    = require('opus.ui')

local colors   = _G.colors
local device   = _G.device

--[[ Configuration Screen ]]
local wizardPage = UI.WizardPage {
	title = 'Trashcan',
	index = 2,
	info = UI.TextArea {
		x = 1, ex = -1, y = 2, ey = 4,
		textColor = colors.yellow,
		marginLeft = 1,
		marginRight = 1,
		value = [[ Items can be automatically dropped from this storage.]],
	},
	form = UI.Form {
		x = 2, ex = -2, y = 4, ey = -2,
		manualControls = true,
		[1] = UI.Checkbox {
			formLabel = 'Drop', formKey = 'drop',
			help = 'Drop the items out of this inventory',
		},
		[2] = UI.Chooser {
			width = 9,
			formLabel = 'Direction', formKey = 'dropDirection',
			nochoice = 'Down',
			choices = {
				{ name = 'Down', value = 'down' },
				{ name = 'Up',   value = 'up' },
				{ name = 'North', value = 'north' },
				{ name = 'South', value = 'south' },
				{ name = 'East', value = 'east' },
				{ name = 'West', value = 'west' },
			},
			help = 'Drop in a specified direction'
		},
	},
}

function wizardPage:validate()
	return self.form:save()
end

function wizardPage:setNode(node)
	self.form:setValues(node)
end

function wizardPage:isValidType(node)
	local m = device[node.name]
	return m and m.pullItems and {
		name = 'Trashcan',
		value = 'trashcan',
		category = 'custom',
		help = 'An inventory to send unwanted items',
	}
end

function wizardPage:isValidFor(node)
	return node.mtype == 'trashcan'
end

UI:getPage('nodeWizard').wizard:add({ trashcan = wizardPage })

--[[ TASK ]]--
local task = {
	name = 'trashcan',
	priority = 90,
}

local function filter(a)
	return a.drop
end

function task:cycle(context)
	local tasks = Tasks()

	for node in context.storage:filterActive('trashcan', filter) do
		pcall(function()
			for k in pairs(node.adapter.list()) do
				local direction = node.dropDirection or 'down'
				tasks:add(function()
					node.adapter.drop(k, 64, direction)
				end)
			end
		end)
	end

	tasks:run()
end

Milo:registerTask(task)