current_pods = {}
check_current_pods = false
endpoint =  ""
token = ""
namespace = ""
automatic = false
local timer = require ("main.timer")

function reverse(tbl)
	for i=1, math.floor(#tbl / 2) do
		local tmp = tbl[i]
		tbl[i] = tbl[#tbl - i + 1]
		tbl[#tbl - i + 1] = tmp
	end
end

function swap_pod(items)
	current_pod_not_running = 0
	kube_pod_not_running = 0
	kube_pod_running = 0
	pod_items_size = table.getn(items)
	current_kubeinvaders_pod_size = table.getn(current_pods)

	for i,value in ipairs(items) do
		if value['status']['phase'] ~= "Running" or value['metadata']['deletionTimestamp'] ~= nil then
			kube_pod_not_running = kube_pod_not_running + 1
		else
			kube_pod_running = kube_pod_running + 1
		end
	end
	
	msg.post("ui#gui", "hello_gui",{ pod_running = kube_pod_running })

	for i,value in ipairs(current_pods) do
		if value["collision"] ~= nil and value["color"] == "red" then
			print("[swap_pod] creating " .. value["id"] .. " in red. Pos: " .. " " .. value["old_position"])
			current_pods[i]["id"] =	factory.create("/pod_not_running#podfactory", value["old_position"])
			current_pods[i]["color"] = "red"
			current_pods[i]["collision"] = nil
			delete_request_pod()
			return
		end
	end
	
	for i,value in ipairs(current_pods) do
		if value["id"] ~= "reset" and value["color"] == "red" then
			current_pod_not_running = current_pod_not_running + 1 
		end
	end
	--print ("[swap_pod]: current pods on Kubernetes: " .. pod_items_size)
	--print ("[swap_pod]: current pods on Kubeinvaders: " .. current_kubeinvaders_pod_size)
	--print ("[swap_pod]: not running pods Kubernetes: " .. kube_pod_not_running)
	--print ("[swap_pod]: not running pods in KubeInvaders: " .. current_pod_not_running)
	
	if kube_pod_running < current_kubeinvaders_pod_size then
		print ("[swap_pod]: there are less pod running in kubernetes")
		i = current_kubeinvaders_pod_size - 1
		deleted_pods = 0
		print ("[swap_pod] clean red pods. Current KubveInvaders pod:" .. current_kubeinvaders_pod_size)
		while ( i > 0) do
			if  current_pods[i] ~= nil and current_pods[i]["color"] == "red" then
				go.delete(current_pods[i]["id"])
				table.remove(current_pods,i)
				deleted_pods = deleted_pods + 1
			end	
			i = i - 1
		end
		msg.post("ui#gui", "error",{ errormessage = "Synchronizing alien ships with Kubernetes pods.." })
		return
	end
	
	if kube_pod_running > current_kubeinvaders_pod_size then
		for i,value in ipairs(current_pods) do
			go.delete(value["id"])
		end
		current_pods = {}
		set_pods()
	end

	if (current_pod_not_running > 0) and (kube_pod_not_running > current_pod_not_running )then
		diff  = kube_pod_not_running - current_pod_not_running
		a = 0
		while ( a < diff ) do
			for i,value in ipairs(current_pods) do
				if value["color"] == "white" then
					go.delete(value["id"])
					local pod = factory.create("/pod_not_running#podfactory", go.get_position(value["id"]))
					current_pods[i] = { id = pod , color = "red" }
				end
			end
			a = a + 1
		end

	elseif current_pod_not_running > kube_pod_not_running then
		diff  = current_pod_not_running - kube_pod_not_running
		a = 0
		while ( a < diff ) do
			for i,value in ipairs(current_pods) do
				if value["color"] == "red" then
					pos = go.get_position()
					go.delete(value["id"])
					local pod = factory.create("/pod#podfactory", go.get_position(value["id"]))				
					current_pods[i] = { id = pod , color = "white" }
				end
			end
			a = a + 1
		end
	end		
end 

function http_update_pod_result(self, _, response)
	pod_running = {}
	if response.status == 0 then
		msg.post("ui#gui", "error",{ errormessage = "Error connecting to " .. conf['endpoint'] })
	end
	pods = json.decode(response.response)
	pod_items_size = table.getn(pods["items"])
	pod_items = pods["items"]
	i = 0
	while i <= pod_items_size do
		if pod_items[i] ~= nil then
			if pod_items[i]['status']['phase'] == "Running" and pod_items[i]['metadata']['deletionTimestamp'] == nil then
				table.insert(pod_running,pod_items[i])
			end
		end
		i = i + 1
	end
	swap_pod(pod_running)
end

function ai()
	msg.post("ui#gui", "error",{ errormessage = "" })
	if automatic == false then
		return
	end
	for i=1,1 do
		rand_pod = math.random(100, 1000)
	end
	pos = go.get_position()
	pos.y = 220
	go.set_position(pos)	
	pos.x = rand_pod	
	go.animate(go.get_id(), "position.x", go.PLAYBACK_ONCE_FORWARD, pos.x, go.EASING_INQUAD, 1,0, function()
		pos = go.get_position()		
		bullet = factory.create("/bullet#bulletfactory", pos)
		go.animate(bullet, "position.y", go.PLAYBACK_ONCE_FORWARD, 700, go.EASING_INQUAD, 1,0,function()
			go.delete(bullet)
		end)	
	end)
end

function update_pod()
	http.request(endpoint .. "/api/v1/namespaces/" .. namespace .. "/pods", "GET", http_update_pod_result,headers)
end

function delete_pod(pod_name)
	print "[delete_pod] delete pods of Kubernetes"
	http.request(endpoint .. "/api/v1/namespaces/" .. namespace .. "/pods/" .. pod_name, "DELETE", http_pod_delete_result,headers)
end

function delete_request_pod()
	http.request(endpoint .. "/api/v1/namespaces/".. namespace .. "/pods", "GET", http_pod_delete_request_result,headers)
end

function http_pod_delete_result(self, _, response)
	print "[http_pod_delete_result] Request for delete pod on kubernetes has been done"
	print(response.status)
	print(response.response)
	print(response.headers)
	if string.match(response.status, '4.*') or string.match(response.status, '5.*')  then
		msg.post("ui#gui", "error",{ errormessage = "Status code: " .. response.status .. "\n" .. response.response })
	end
end

function http_pod_delete_request_result(self, _, response)
	pods = {}
	pods = json.decode(response.response)
	pod_items_size = table.getn(pods["items"])
	a = 0
	while a <= pod_items_size do
		if pod_items[a] ~= nil then
			if pod_items[a]['status']['phase'] == "Running" and pod_items[a]['metadata']['deletionTimestamp'] == nil then
				pod_to_delete = pod_items[a]['metadata']['name']
				break
			end
		end
		a = a + 1
	end
	delete_pod(pod_to_delete)
end

function http_pod_result(self, _, response)
	print(response.status)
	print(response.response)
	print(response.headers)

	if string.match(response.status, '4.*') or string.match(response.status, '5.*')  then
		msg.post("ui#gui", "error",{ errormessage = "Status code: " .. response.status .. "\n" .. response.response })
	end
	
	pods = json.decode(response.response)
	pod_items_size = table.getn(pods["items"])
	pod_items = pods["items"]
	check_above = false
	a = 0
	distance_between_pods = 1000 / pod_items_size
	y_pos = 600
	space_between_factor = 0
	
	if pod_items_size <= 15 then
		space_between_factor = pod_items_size
	else
		space_between_factor = 15
	end
	
	while( a <= pod_items_size )
	do  
		if pod_items[a] ~= nil then
			this_pod = pod_items[a]
			phase = this_pod["status"]["phase"]
			local pos = go.get_position()

			if a <= 15 then
				pos.x = 100 + ( a * (1000 / space_between_factor) )	
			end 
			
			if (a % 15 == 0) then
				y_pos = y_pos - (( a / 15 ) * 50) 
				check_above = true
			end

			if check_above == true then
				pos_of_pod_above  = go.get_position(current_pods[a - 14]['id'])
				pos.x = pos_of_pod_above.x
			end
			
			pos.y = y_pos			
			if phase == "Running" and this_pod['metadata']['deletionTimestamp'] == nil then
				local pod = factory.create("/pod#podfactory", pos)				
				table.insert(current_pods, { id = pod , color = "white" })
				check_current_pods = true
			else
				local pod = factory.create("/pod_not_running#podfactory", pos)
				table.insert(current_pods, { id = pod , color = "red" })
				check_current_pods = true				
			end
		end
		a = a+1		
	end
end

function set_pods()
	http.request(endpoint .. "/api/v1/namespaces/".. namespace .. "/pods", "GET", http_pod_result,headers)
end

function init(self)
	msg.post("ui#gui", "mode",{ mode = "You are using the manual mode. Press \"a\" to use switch to automatic"})

	conf = {}
	local path = os.getenv("HOME") .. "/.KubeInv.json"
	local contents = ""
	conf = {}
	local file = io.open( path, "r" )
    if file then
		local contents = file:read( "*a" )
		conf = json.decode(contents);
		io.close(file)
	else
		conf["token"] = os.getenv("TOKEN")
		conf["endpoint"] = os.getenv("ENDPOINT") 
		conf["namespace"] = os.getenv("NAMESPACE") 
	end 

	if conf["token"] == nil or conf["endpoint"] == nil or conf["namespace"] == nil then
		msg.post("ui#gui", "howto",{ howto_message = "Please create .KubeInv.json in " ..  os.getenv("HOME") .. "\nThe file .KubeInv.json should be like this \n{\"endpoint\": \"http://ocmaster39\",\"token\": \"xxxx\",\"namespace\": \"foobar\"}"})
	else
		print( "token: ", conf["token"] )
		print( "endpoint: ", conf["endpoint"] )
		print( "namespace: ", conf["namespace"] )

		endpoint = conf["endpoint"]
		namespace = conf["namespace"]
		token = conf["token"] 

		info = "Endpoint: " .. conf["endpoint"] .. "\n\n" .. "Namespace: " .. conf["namespace"]
		msg.post("ui#gui", "info",{ infomessage =  info })
		
		msg.post(".", "acquire_input_focus")	

		headers = {
			["Accept"] = "application/json",
			["Content-Type"] = "application/json",
			["Authorization"] = "Bearer " .. token
		}
		timer.repeat_seconds(0.3, function()
			update_pod()
		end)	
		timer.repeat_seconds(2, function()
			ai()
		end)
		set_pods()
	end
end



function update(self, dt)
	timer.update(dt)
end

function on_input(self, action_id, action)
	print "start on_input"
	if action_id == hash("up") then
		local p = go.get_position()
		p.y = p.y + 4
		go.set_position(p)
	elseif action_id == hash("down") then
		local p = go.get_position()
		p.y = p.y - 4
		go.set_position(p)
	elseif action_id == hash("left") then
		local p = go.get_position()
		p.x = p.x - 4
		go.set_position(p)
	elseif action_id == hash("right") then
		local p = go.get_position()
		p.x = p.x + 4
		go.set_position(p)	
	elseif action_id == hash("click") and action.pressed then
		print(action_id)
	elseif action_id == hash("automatic") then
		automatic = true
		msg.post("ui#gui", "mode",{ mode = "You are using the automatic mode. Press \"m\" to use switch to manual"})
		
	elseif action_id == hash("manual") then
		automatic = false
		msg.post("ui#gui", "mode",{ mode = "You are using the manual mode. Press \"a\" to use switch to automatic"})
		
	elseif action_id == hash("space") and action.pressed then
		msg.post("ui#gui", "error",{ errormessage = "" })
		if automatic == false then 
			local pos = go.get_position()
			local to = pos.y + 2 * 64
			local bullet = factory.create("/bullet#bulletfactory", pos)
			go.animate(bullet, "position.y", go.PLAYBACK_ONCE_FORWARD, 700, go.EASING_INQUAD, 1,0,function()
				go.delete(bullet)
			end)
		end
	end
end

function on_message(self, message_id, message, sender)

end