_G.requireInjector(_ENV)

local Peripheral = require('opus.peripheral')

_G.device = Peripheral.getList()

_G.device.terminal = _G.kernel.terminal
_G.device.terminal.side = 'terminal'
_G.device.terminal.type = 'terminal'
_G.device.terminal.name = 'terminal'

_G.device.keyboard = {
	side    = 'keyboard',
	type    = 'keyboard',
	name    = 'keyboard',
	hotkeys = { },
	state   = { },
}

_G.device.mouse = {
	side    = 'mouse',
	type    = 'mouse',
	name    = 'mouse',
	state   = { },
}

local Input      = require('opus.input')
local Util       = require('opus.util')

local device   = _G.device
local kernel   = _G.kernel
local keyboard = _G.device.keyboard
local keys     = _G.keys
local mouse    = _G.device.mouse
local os       = _G.os

local drivers = { }

kernel.hook('peripheral', function(_, eventData)
	local side = eventData[1]
	if side then
		local dev = Peripheral.addDevice(device, side)
		if dev then
			if drivers[dev.type] then
				local e = drivers[dev.type](dev)
				if type(e) == 'table' then
					for _, v in pairs(e) do
						os.queueEvent('device_attach', v.name)
					end
				elseif e then
					os.queueEvent('device_attach', e.name)
				end
			end

			os.queueEvent('device_attach', dev.name, dev)
		end
	end
end)

kernel.hook('peripheral_detach', function(_, eventData)
	local side = eventData[1]
	if side then
		for _, dev in pairs(Util.findAll(device, 'side', side)) do
			os.queueEvent('device_detach', dev.name, dev)
			if dev._children then
				for _,v in pairs(dev._children) do
					os.queueEvent('peripheral_detach', v.name)
				end
			end
			device[dev.name] = nil
		end
	end
end)

local modifiers = Util.transpose {
	keys.leftCtrl,  keys.rightCtrl,
	keys.leftShift, keys.rightShift,
	keys.leftAlt,   keys.rightAlt,
}

kernel.hook({ 'key', 'key_up', 'char', 'paste' }, function(event, eventData)
	local code = eventData[1]

	-- maintain global keyboard modifier state
	if modifiers[code] then
		if event == 'key' then
			keyboard.state[code] = true
		elseif event == 'key_up' then
			keyboard.state[code] = nil
		end
	end

	-- and fire hotkeys
	local hotkey = Input:translate(event, eventData[1], eventData[2])

	if hotkey and keyboard.hotkeys[hotkey.code] then
		keyboard.hotkeys[hotkey.code](event, eventData)
		return true
	end
end)

kernel.hook({ 'mouse_click', 'mouse_up', 'mouse_drag' }, function(event, eventData)
	local button = eventData[1]
	if event == 'mouse_click' then
		mouse.state[button] = true
	else
		if not mouse.state[button] then
			return true -- ensure mouse ups are only generated if a mouse down was sent
		end
		if event == 'mouse_up' then
			mouse.state[button] = nil
		end
	end
end)

function keyboard.addHotkey(code, fn)
	keyboard.hotkeys[code] = fn
end

function keyboard.removeHotkey(code)
	keyboard.hotkeys[code] = nil
end

local function createDevice(name, devType, method, manipulator)
	local dev = {
		name = name,
		side = name,
		type = devType,
	}
	local methods = {
		'drop', 'getDocs', 'getItem', 'getItemMeta', 'getTransferLocations',
		'list', 'pullItems', 'pushItems', 'size', 'suck',
	}
	if manipulator[method] then
		for _,k in pairs(methods) do
			dev[k] = function(...)
				return manipulator[method]()[k](...)
			end
		end
		if not manipulator._children then
			manipulator._children = { dev }
		else
			table.insert(manipulator._children, dev)
		end
		device[name] = dev
	end
end

drivers['manipulator'] = function(dev)
	if dev.getName then
		pcall(function()
			local name = dev.getName()
			if name then
				if dev.getInventory then
					createDevice(name .. ':inventory', 'inventory', 'getInventory', dev)
				end
				if dev.getEquipment then
					createDevice(name .. ':equipment', 'equipment', 'getEquipment', dev)
				end
				if dev.getEnder then
					createDevice(name .. ':enderChest', 'enderChest', 'getEnder', dev)
				end

				return dev._children
			end
		end)
	end
end

-- initialize drivers
for _,v in pairs(device) do
	if drivers[v.type] then
		local s, m = pcall(drivers[v.type], v)
		if not s and m then
			_G.printError(m)
		end
	end
end