local network = require("client")
require("client.world")

function move(player, x, y)
	local dir = strvec_to_intvec(x,y)
	player.x = dir.x
	player.y = dir.y
end

function dir_to_vec(dir)
	if dir == "up" then
		return vec(0,-1)
	elseif dir == "down" then
		return vec(0,1)
	elseif dir == "left" then
		return vec(-1,0)
	elseif dir == "right" then
		return vec(1,0)
	else
		return vec(0,0)
	end
end

function strvec_to_intvec(x,y)
	return vec(tonumber(x), tonumber(y))
end


function love.load()
	network.connect("127.0.0.1", 9000)

	network.on(network.MSG_ON_CONNECT, function(payload)
		print("connected to server with id " .. payload)
		add_player(payload)
		if client_id == 0 then
			client_id = payload
		end
	end)

	network.on(network.MSG_GAMESTATE, function(payload)
		local cmds = read_command(payload)
		act_on_command(cmds)
	end)

	network.on(network.MSG_ON_PLAYER_CONNECT, function(payload)
		if payload == client_id then return end
		add_player(payload)
		for i, v in pairs(world.entities.players) do
			network.sendPacket(network.MSG_KEY_PRESS, "player/" .. v.client_id .. "/moved/" .. v.x .. "/".. v.y)
		end
	end)
end

function add_player(id)
		local new_player = {
			x = 0,
			y = 0,
			sprite = 0,
			client_id = id
		}

		world.entities.players[new_player.client_id] = new_player

		return new_player
end

function love.keypressed(key)
	local dir
	if key == "w" then
		dir = vec(0,-world.cell_size)
	elseif key == "a" then
		dir = vec(-world.cell_size,0)
	elseif key == "s" then
		dir = vec(0,world.cell_size)
	elseif key == "d" then
		dir = vec(world.cell_size,0)
	else
		dir = "right"
	end
	network.sendPacket(network.MSG_KEY_PRESS, "player/" .. client_id .. "/moved/" .. world.entities.players[client_id].x + dir.x .. "/".. world.entities.players[client_id].y + dir.y)
end

function love.update()
	network.update()
end

function love.draw()
	for i, v in pairs(world.entities.players) do
		love.graphics.rectangle("fill", v.x, v.y, world.cell_size, world.cell_size)
		love.graphics.print(v.client_id, v.x, v.y - world.cell_size - 5)
	end

end

function read_command(payload)
	local cmds = {}
	local num_cmds = 1

	local s = ""
	for i in string.gmatch(payload, ".") do
		if i ~= "/" then
			s = s .. i
		else
			cmds[num_cmds] = s
			s = ""
			num_cmds = num_cmds + 1
		end
	end
	cmds[num_cmds] = s
	return cmds
end

function act_on_command(cmds)
	if cmds[1] == "player" then
		-- do player sync
		for i, v in pairs(world.entities.players) do
			if v.client_id == cmds[2] then
				if cmds[3] == "moved" then
					local player = world.entities.players[cmds[2]]
					move(player, tonumber(cmds[4]),tonumber(cmds[5]))
				end
			end

			if world.entities.players[cmds[2]] == nil then
				print("adding player")
				add_player(cmds[2])
			end
		end
	end
end