Layout = {}

local north = defines.direction.north
local east = defines.direction.east
local south = defines.direction.south
local west = defines.direction.west

local opposite = {[north] = south, [east] = west, [south] = north, [west] = east}
local DX = {[north] = 0, [east] = 1, [south] = 0, [west] = -1}
local DY = {[north] = -1, [east] = 0, [south] = 1, [west] = 0}

local make_connection = function(id, outside_x, outside_y, inside_x, inside_y, direction_out)
	return {
		id = id,
		outside_x = outside_x,
		outside_y = outside_y,
		inside_x = inside_x,
		inside_y = inside_y,
		indicator_dx = DX[direction_out],
		indicator_dy = DY[direction_out],
		direction_in = opposite[direction_out],
		direction_out = direction_out,
	}
end
remote_api.make_connection = make_connection

local layout_generators = {
	['factory-1'] = {
		name = 'factory-1',
		tier = 1,
		inside_size = 30,
		outside_size = 8,
		inside_door_x = 0,
		inside_door_y = 16,
		outside_door_x = 0,
		outside_door_y = 4,
		outside_energy_receiver_type = 'factory-power-input-8',
		inside_energy_x = -4,
		inside_energy_y = 17,
		overlay_x = 0,
		overlay_y = 3,
		rectangles = {
			{
				x1 = -16, x2 = 16, y1 = -16, y2 = 16, tile = 'factory-wall-1'
			},
			{
				x1 = -15, x2 = 15, y1 = -15, y2 = 15, tile = 'factory-floor'
			},
			{
				x1 = -3, x2 = 3, y1 = 15, y2 = 18, tile = 'factory-wall-1'
			},
			{
				x1 = -2, x2 = 2, y1 = 15, y2 = 18, tile = 'factory-entrance'
			},
		},
		mosaics = {
			{	x1 = -6, x2 = 6, y1 = -4, y2 = 4, tile = 'factory-pattern-1',
				pattern = {
					' ++++    ++ ',
					'++  ++  +++ ',
					'++  ++ + ++ ',
					'++ +++   ++ ',
					'+++ ++   ++ ',
					'++  ++   ++ ',
					'++  ++   ++ ',
					' ++++  +++++',
				}
			},
		},
		connection_tile = 'factory-floor',
		connections = {
			w1 = make_connection('w1', -4.5,-2.5, -15.5,-9.5, west),
			w2 = make_connection('w2', -4.5,-1.5, -15.5,-5.5, west),
			w3 = make_connection('w3', -4.5,1.5, -15.5,5.5, west),
			w4 = make_connection('w4', -4.5,2.5, -15.5,9.5, west),

			e1 = make_connection('e1', 4.5,-2.5, 15.5,-9.5, east),
			e2 = make_connection('e2', 4.5,-1.5, 15.5,-5.5, east),
			e3 = make_connection('e3', 4.5,1.5, 15.5,5.5, east),
			e4 = make_connection('e4', 4.5,2.5, 15.5,9.5, east),

			n1 = make_connection('n1', -2.5,-4.5, -9.5,-15.5, north),
			n2 = make_connection('n2', -1.5,-4.5, -5.5,-15.5, north),
			n3 = make_connection('n3', 1.5,-4.5, 5.5,-15.5, north),
			n4 = make_connection('n4', 2.5,-4.5, 9.5,-15.5, north),

			s1 = make_connection('s1', -2.5,4.5, -9.5,15.5, south),
			s2 = make_connection('s2', -1.5,4.5, -5.5,15.5, south),
			s3 = make_connection('s3', 1.5,4.5, 5.5,15.5, south),
			s4 = make_connection('s4', 2.5,4.5, 9.5,15.5, south),

		},
		overlays = {
			outside_x = 0,
			outside_y = -1,
			outside_w = 8,
			outside_h = 6,
			inside_x = 3.5,
			inside_y = 16.5,
		},
	},
	['factory-2'] = {
		name = 'factory-2',
		tier = 2,
		inside_size = 46,
		outside_size = 12,
		inside_door_x = 0,
		inside_door_y = 24,
		outside_door_x = 0,
		outside_door_y = 6,
		outside_energy_receiver_type = 'factory-power-input-12',
		inside_energy_x = -4,
		inside_energy_y = 25,
		overlay_x = 0,
		overlay_y = 5,
		rectangles = {
			{
				x1 = -24, x2 = 24, y1 = -24, y2 = 24, tile = 'factory-wall-2'
			},
			{
				x1 = -23, x2 = 23, y1 = -23, y2 = 23, tile = 'factory-floor'
			},
			{
				x1 = -3, x2 = 3, y1 = 23, y2 = 26, tile = 'factory-wall-2'
			},
			{
				x1 = -2, x2 = 2, y1 = 23, y2 = 26, tile = 'factory-entrance'
			},
		},
		mosaics = {
			{	x1 = -6, x2 = 6, y1 = -4, y2 = 4, tile = 'factory-pattern-2',
				pattern = {
					' ++++   +++ ',
					'++  ++ ++ ++',
					'++  ++    ++',
					'++ +++   ++ ',
					'+++ ++  ++  ',
					'++  ++ ++   ',
					'++  ++ ++ ++',
					' ++++  +++++',
				}
			},
		},
		connection_tile = 'factory-floor',
		connections = {
			w1 = make_connection('w1', -6.5,-4.5, -23.5,-18.5, west),
			w2 = make_connection('w2', -6.5,-3.5, -23.5,-13.5, west),
			w3 = make_connection('w3', -6.5,-2.5, -23.5,-8.5, west),
			w4 = make_connection('w4', -6.5,2.5, -23.5,8.5, west),
			w5 = make_connection('w5', -6.5,3.5, -23.5,13.5, west),
			w6 = make_connection('w6', -6.5,4.5, -23.5,18.5, west),

			e1 = make_connection('e1', 6.5,-4.5, 23.5,-18.5, east),
			e2 = make_connection('e2', 6.5,-3.5, 23.5,-13.5, east),
			e3 = make_connection('e3', 6.5,-2.5, 23.5,-8.5, east),
			e4 = make_connection('e4', 6.5,2.5, 23.5,8.5, east),
			e5 = make_connection('e5', 6.5,3.5, 23.5,13.5, east),
			e6 = make_connection('e6', 6.5,4.5, 23.5,18.5, east),

			n1 = make_connection('n1', -4.5,-6.5, -18.5,-23.5, north),
			n2 = make_connection('n2', -3.5,-6.5, -13.5,-23.5, north),
			n3 = make_connection('n3', -2.5,-6.5, -8.5,-23.5, north),
			n4 = make_connection('n4', 2.5,-6.5, 8.5,-23.5, north),
			n5 = make_connection('n5', 3.5,-6.5, 13.5,-23.5, north),
			n6 = make_connection('n6', 4.5,-6.5, 18.5,-23.5, north),

			s1 = make_connection('s1', -4.5,6.5, -18.5,23.5, south),
			s2 = make_connection('s2', -3.5,6.5, -13.5,23.5, south),
			s3 = make_connection('s3', -2.5,6.5, -8.5,23.5, south),
			s4 = make_connection('s4', 2.5,6.5, 8.5,23.5, south),
			s5 = make_connection('s5', 3.5,6.5, 13.5,23.5, south),
			s6 = make_connection('s6', 4.5,6.5, 18.5,23.5, south),
		},
		overlays = {
			outside_x = 0,
			outside_y = -1,
			outside_w = 12,
			outside_h = 10,
			inside_x = 3.5,
			inside_y = 24.5,
		},
	},
	['factory-3'] = {
		name = 'factory-3',
		tier = 3,
		inside_size = 60,
		outside_size = 16,
		inside_door_x = 0,
		inside_door_y = 31,
		outside_door_x = 0,
		outside_door_y = 8,
		outside_energy_receiver_type = 'factory-power-input-16',
		inside_energy_x = -4,
		inside_energy_y = 32,
		overlay_x = 0,
		overlay_y = 7,
		rectangles = {
			{
				x1 = -31, x2 = 31, y1 = -31, y2 = 31, tile = 'factory-wall-3'
			},
			{
				x1 = -30, x2 = 30, y1 = -30, y2 = 30, tile = 'factory-floor'
			},
			{
				x1 = -3, x2 = 3, y1 = 30, y2 = 33, tile = 'factory-wall-3'
			},
			{
				x1 = -2, x2 = 2, y1 = 30, y2 = 33, tile = 'factory-entrance'
			},
		},
		mosaics = {
			{	x1 = -6, x2 = 6, y1 = -4, y2 = 4, tile = 'factory-pattern-3',
				pattern = {
					' ++++   +++ ',
					'++  ++ ++ ++',
					'++  ++    ++',
					'++ +++   ++ ',
					'+++ ++    ++',
					'++  ++    ++',
					'++  ++ ++ ++',
					' ++++   +++ ',
				}
			},
		},
		connection_tile = 'factory-floor',
		connections = {
			w1 = make_connection('w1', -8.5,-5.5, -30.5,-24.5, west),
			w2 = make_connection('w2', -8.5,-4.5, -30.5,-20.5, west),
			w3 = make_connection('w3', -8.5,-3.5, -30.5,-9.5, west),
			w4 = make_connection('w4', -8.5,-2.5, -30.5,-5.5, west),
			w5 = make_connection('w5', -8.5,2.5, -30.5,5.5, west),
			w6 = make_connection('w6', -8.5,3.5, -30.5,9.5, west),
			w7 = make_connection('w7', -8.5,4.5, -30.5,20.5, west),
			w8 = make_connection('w8', -8.5,5.5, -30.5,24.5, west),

			e1 = make_connection('e1', 8.5,-5.5, 30.5,-24.5, east),
			e2 = make_connection('e2', 8.5,-4.5, 30.5,-20.5, east),
			e3 = make_connection('e3', 8.5,-3.5, 30.5,-9.5, east),
			e4 = make_connection('e4', 8.5,-2.5, 30.5,-5.5, east),
			e5 = make_connection('e5', 8.5,2.5, 30.5,5.5, east),
			e6 = make_connection('e6', 8.5,3.5, 30.5,9.5, east),
			e7 = make_connection('e7', 8.5,4.5, 30.5,20.5, east),
			e8 = make_connection('e8', 8.5,5.5, 30.5,24.5, east),

			n1 = make_connection('n1', -5.5,-8.5, -24.5,-30.5, north),
			n2 = make_connection('n2', -4.5,-8.5, -20.5,-30.5, north),
			n3 = make_connection('n3', -3.5,-8.5, -9.5,-30.5, north),
			n4 = make_connection('n4', -2.5,-8.5, -5.5,-30.5, north),
			n5 = make_connection('n5', 2.5,-8.5, 5.5,-30.5, north),
			n6 = make_connection('n6', 3.5,-8.5, 9.5,-30.5, north),
			n7 = make_connection('n7', 4.5,-8.5, 20.5,-30.5, north),
			n8 = make_connection('n8', 5.5,-8.5, 24.5,-30.5, north),

			s1 = make_connection('s1', -5.5,8.5, -24.5,30.5, south),
			s2 = make_connection('s2', -4.5,8.5, -20.5,30.5, south),
			s3 = make_connection('s3', -3.5,8.5, -9.5,30.5, south),
			s4 = make_connection('s4', -2.5,8.5, -5.5,30.5, south),
			s5 = make_connection('s5', 2.5,8.5, 5.5,30.5, south),
			s6 = make_connection('s6', 3.5,8.5, 9.5,30.5, south),
			s7 = make_connection('s7', 4.5,8.5, 20.5,30.5, south),
			s8 = make_connection('s8', 5.5,8.5, 24.5,30.5, south),
		},
		overlays = {
			outside_x = 0,
			outside_y = -1,
			outside_w = 16,
			outside_h = 14,
			inside_x = 3.5,
			inside_y = 31.5,
		},
	}
}

local function init()
	global.layout_generators = global.layout_generators or layout_generators
end
Layout.init = init

remote_api.add_layout = function(layout)
	init()
	global.layout_generators[layout.name] = layout
end

function has_layout(name)
	return global.layout_generators[name] ~= nil
end
remote_api.has_layout = has_layout
Layout.has_layout = has_layout

local function create_layout(name)
	local layout = global.layout_generators[name]
	if layout then
		return table.deepcopy(layout)
	else
		return nil
	end
end
remote_api.create_layout = create_layout
Layout.create_layout = create_layout