local Luan = require "luan:Luan.luan"
local error = Luan.error
local Io = require "luan:Io.luan"
local print = Io.print or error()
local Swing = require "luan:swing/Swing.luan"
local new_frame = require("luan:swing/Frame.luan").new or error()
local new_label = require("luan:swing/Label.luan").new or error()
local new_text_area = require("luan:swing/Text_area.luan").new or error()
local new_scroll_pane = require("luan:swing/Scroll_pane.luan").new or error()
local new_list = require("luan:swing/List.luan").new or error()
local new_menu_bar = require("luan:swing/Menu_bar.luan").new or error()
local new_menu = require("luan:swing/Menu.luan").new or error()
local new_menu_item = require("luan:swing/Menu_item.luan").new or error()
local Logging = require "luan:logging/Logging.luan"
local logger = Logging.logger "editor"


local new_window

local function make_menu_bar(window)
	local menu_bar = new_menu_bar()
		local file_menu = new_menu()
		file_menu.text = "File"
			local new_file = new_menu_item()
			new_file.text = "New File"
			new_file.accelerator = "meta N"
			new_file.add_action_listener(function()
				new_window()
			end)
			file_menu.add(new_file)
			local open = new_menu_item()
			open.text = "Open..."
			open.accelerator = "meta O"
			open.add_action_listener(function()
				local file_chooser = window.frame.file_chooser_load()
				if window.file ~= nil then
					file_chooser.directory = window.file.parent()
				end
				file_chooser.visible = true
				local file = file_chooser.file
				if file ~= nil then
					new_window(file)
				end
			end)
			file_menu.add(open)
		menu_bar.add(file_menu)
	return menu_bar
end

local n_windows = 0

function new_window(file)
	local frame = new_frame()
	frame.title = file and file.to_string() or "untitled"
	frame.add_close_listener(function()
		n_windows = n_windows - 1
		if n_windows == 0 then
			Luan.exit()
		end
	end)
	local text_area = new_text_area()
	if file ~= nil then
		text_area.text = file.read_text()
	end
	text_area.rows = 10
	text_area.columns = 20
	text_area.wrap_style_word = true
	text_area.line_wrap = true
	text_area.tab_size = 4
	text_area.set_font{ family="Monospaced", size=13 }
	text_area.select(0,0)
	--print(text_area.line_count)
	local scroll_pane = new_scroll_pane(text_area)
	local list = new_list()
	list.add_element("1")
	list.add_element("2")
	list.add_element("3")
	--scroll_pane.set_row_header_view(list)
	frame.add(scroll_pane)
	local window = {
		frame = frame
		file = file
	}
	local menu_bar = make_menu_bar(window)
	frame.set_menu_bar(menu_bar)
	frame.pack()
	frame.visible = true
	text_area.request_focus_in_window()
	n_windows = n_windows + 1
end

Swing.run(function()
	new_window()
end)