-- load standard vis module, providing parts of the Lua API
require('vis')
require('plugins/filetype')
require('plugins/textobject-lexer')
require('plugins/vis-cursors/cursors').cursors_path = string.format('%s/vis/cursors', os.getenv('XDG_DATA_HOME') or os.getenv('HOME').."/.local/share")
require('plugins/vis-spellcheck/spellcheck')
require('plugins/vis-commentary/vis-commentary')
require('plugins/vis-ctags/ctags')
-- This hooks vis.events.START so its fine to load it before the default settings
require('plugins/vis-modelines/vis-modelines')

require('plugins/suw')

vis.events.subscribe(vis.events.INIT, function()
	-- Your global configuration options
	local theme = "theme"
	vis:command("set theme ".. theme)
end)

vis.events.subscribe(vis.events.WIN_OPEN, function(win)
	-- Default settings
	tabwidth = 4
	vis:command('set tabwidth '..tabwidth)
	vis:command('set autoindent')
	vis:command('set number')
	vis:command('set colorcolumn 80')
	vis:command('set show-tabs')

	if win.file.name then
		if win.file.name:find("COMMIT_EDITMSG") then
			vis:command('set colorcolumn 72')
			win:set_syntax("diff")
		end

		if win.syntax == "python" or win.syntax == "rust" then
			vis:command('set expandtab')
			vis:map(vis.modes.INSERT, '<Backspace>', function()
				local found_tab = true
				for selection in vis.win:selections_iterator() do
					local pos = selection.pos
					if not pos or pos < tabwidth or vis.win.file:content(pos - tabwidth, tabwidth) ~= string.rep(' ', tabwidth) then
						found_tab = false
						break
					end
				end
				vis:feedkeys(string.rep('<vis-delete-char-prev>', found_tab and tabwidth or 1))
			end)
		end
	end
end)

-- load plugins that hook WIN_OPEN to change settings after hook with default settings
require('plugins/vis-editorconfig/editorconfig')

vis:command_register("fzf", function(argv, force, cur_win, selection, range)
	local out = io.popen("fzf"):read()
	if out then
		if argv[1] then
			vis:command(string.format('e "%s"', out))
			-- should e return false when failed
		else
			vis:command(string.format('open "%s"', out))
		end
		vis:feedkeys("<vis-redraw>")
	end
end)

vis:map(vis.modes.NORMAL, ";l", function()
	vis:command('fzf')
end)

vis:map(vis.modes.NORMAL, ";o", function()
	vis:command('fzf true')
end)

vis:map(vis.modes.NORMAL, ";;", "<vis-window-next>")

--vis.events.subscribe(vis.events.FILE_SAVE_PRE, function(file)
	---- purge trailing whitespace
	--local i = 1
	--while i <= #file.lines do
		--file.lines[i] = file.lines[i]:match("(.-)%s*$")
		--i = i + 1
	--end
    --return true
--end)