local MAX_COUNT=5
local TASK_ID=1

local DownloaderHeadManager = {
	downCount=0,
	tasks={},
	dowloadTasks={},
	scheduleId=nil,
}--class("DownloaderHeadManager")


function DownloaderHeadManager.addTask(node,imageUrl, fileName, updateHeadImage)
	--如果在队列里面 还没开始下载 则更新数据就行
	local isExist,oldTask=DownloaderHeadManager.isExitTask(node)
	if isExist then
		oldTask.imageUrl=imageUrl
		oldTask.fileName=fileName
		oldTask.updateHeadImage=updateHeadImage
		return
	end

	--如果已经开始下载 
	local isDownload,oldTask=DownloaderHeadManager.isExitDowloadTask(node)
	if isDownload then
		if oldTask.imageUrl==imageUrl then
			oldTask.updateHeadImage=updateHeadImage
			return
		end
	end

	local task={
		node=node,
		imageUrl=imageUrl,
		fileName=fileName,
		updateHeadImage=updateHeadImage,
		id=TASK_ID,
	}
	dump(task,"DownloaderHeadManager.addTask")
	-- logD(" DownloaderHeadManager.addTask",tabletostring(task))
	table.insert(DownloaderHeadManager.tasks,task)
	TASK_ID=TASK_ID+1

	DownloaderHeadManager.update()
	-- if not DownloaderHeadManager.scheduleId then
	-- 	DownloaderHeadManager.scheduleId=cc.Director:getInstance():getScheduler():scheduleScriptFunc(DownloaderHeadManager.update , 0 , false)
	-- end
end

function DownloaderHeadManager.isExitTask(node)
	for k,v in pairs(DownloaderHeadManager.tasks) do
		if v.node==node then
			return true,v
		end
	end
	return false,nil
end

function DownloaderHeadManager.isExitDowloadTask(node)
	for k,v in pairs(DownloaderHeadManager.dowloadTasks) do
		if v.node==node then
			return true,v
		end
	end
	return false,nil
end

function DownloaderHeadManager.removeDownloadTask(task)
	for k,v in pairs(DownloaderHeadManager.dowloadTasks) do
		if v.id==task.id then
			table.remove(DownloaderHeadManager.dowloadTasks,k)
			return
		end
	end
end

function DownloaderHeadManager.update()
	logD("DownloaderHeadManager.update11111111111")
	if #DownloaderHeadManager.tasks>0 and DownloaderHeadManager.downCount<MAX_COUNT then
		print("DownloaderHeadManager.update downCount:"..DownloaderHeadManager.downCount.." total:"..(#DownloaderHeadManager.tasks))
		DownloaderHeadManager.downCount=DownloaderHeadManager.downCount+1
		local task=DownloaderHeadManager.tasks[#DownloaderHeadManager.tasks]
		DownloaderHeadManager.tasks[#DownloaderHeadManager.tasks]=nil
		if task.node and not tolua.isnull(task.node) then
			DownloaderHeadManager.download(task)
		else
			print("不存在 DownloaderHeadManager.update downCount:"..DownloaderHeadManager.downCount.." total:"..(#DownloaderHeadManager.tasks))
			DownloaderHeadManager.downCount=DownloaderHeadManager.downCount-1
		end
	end
	logD("DownloaderHeadManager.update2222222222")
	-- if #DownloaderHeadManager.tasks ==0 then
	-- 	logD("结束头像更新")
	-- 	cc.Director:getInstance():getScheduler():unscheduleScriptEntry(DownloaderHeadManager.scheduleId)
	-- 	DownloaderHeadManager.scheduleId=nil
	-- end
end


function DownloaderHeadManager.download(task)
	-- DownloaderHeadManager.dowloadTasks[]
	table.insert(DownloaderHeadManager.dowloadTasks,task)

	local function callback()
		dump(task,"DownloaderHeadManager.download callback downCount:"..DownloaderHeadManager.downCount)
		DownloaderHeadManager.downCount=DownloaderHeadManager.downCount-1
		DownloaderHeadManager.update()
		if task.updateHeadImage then
			task.updateHeadImage()
		end
		DownloaderHeadManager.removeDownloadTask(task)
	end

	dowloadImageFile(task.imageUrl,task.fileName,callback)
	-- if isWin32Platform() then
	-- 	getImageFromUrlWithTime(task.imageUrl, task.fileName, nil, callback)
	-- else
	-- 	local fullPath = cc.FileUtils:getInstance():getWritablePath()..task.fileName

	-- 	local function onFinish(result)
	-- 		local resultJson = json.decode(result)
	-- 		dump(resultJson,"DownloaderHeadManager.download onFinish")
	-- 		local code = tonumber(resultJson.code)
	-- 		local msg = resultJson.message
	-- 		callback()
	-- 		local isExist = cc.FileSystem:fileExists(fullPath)
	-- 		if isExist then
	-- 			saveImageTime(task.fileName, os.time())
	-- 		end
	-- 	end
		
	-- 	app.plugin:createTask(task.imageUrl,fullPath,onFinish,-1)
	-- end
end

return DownloaderHeadManager