local function toggle(player)
	if not player.gui.top.global_chat_toggle then return end
	
	local button = player.gui.top.global_chat_toggle
	
	if button.caption == "Global Chat" then
		button.caption = "Team Chat"
		button.tooltip = "Chat messages are only sent to your team."
		button.style.font_color = {r=0.77, g=0.77, b=0.0}
		return
	end
	
	button.caption = "Global Chat"
	button.tooltip = "Chat messages are sent to everyone."
	button.style.font_color = {r=0.0, g=0.77, b=0.0}	
end

local function create_gui_button(player)
	if player.gui.top.global_chat_toggle then return end
	local b = player.gui.top.add({
		type = "sprite-button",
		name = "global_chat_toggle",
		caption = "",
	})
	b.style.font = "heading-2"
	b.style.minimal_width = 100
	b.style.minimal_height = 38
	b.style.maximal_height = 38
	b.style.padding = 1
	b.style.margin = 0	
	toggle(player)
end

local function on_player_joined_game(event)	
	local player = game.players[event.player_index]
	create_gui_button(player)
end

local function on_gui_click(event)
	if not event then return end
	if not event.element then return end
	if not event.element.valid then return end	
	local player = game.players[event.element.player_index]
	if event.element.name ~= "global_chat_toggle" then return end	
	toggle(player)
end

local function on_console_chat(event)
	if not event.message then return end	
	if not event.player_index then return end	
	local player = game.players[event.player_index] 
	if not player.gui.top.global_chat_toggle then return end
	local button = player.gui.top.global_chat_toggle
	if button.caption ~= "Global Chat" then return	end
	for _, force in pairs(game.forces) do
		if force.name ~= player.force.name then
			force.print(player.name .. " " .. player.tag .. ": " .. event.message, player.chat_color)
		end
	end
end

local Event = require 'utils.event'
Event.on_init(on_init) 
Event.add(defines.events.on_console_chat, on_console_chat)
Event.add(defines.events.on_player_joined_game, on_player_joined_game)
Event.add(defines.events.on_gui_click, on_gui_click)