require "main.global"

local fileOpt = {}

local function createDir()
	local file = io.open(APP_DIR, "rb")
	if file then file:close()
	else
		log_print.info("create dir")
		os.execute("mkdir -p " .. APP_DIR)
	end
end

function fileOpt.init()
	createDir()
end

function fileOpt.read(fileName, useBkp)
	local data
	local file = io.open(fileName, "r")

	if file == nil then
		if not useBkp then
			--log_print.info("fuck_nm：")
			return nil
		else
			--log_print.info("fuck_what：")
			local file_bkp = io.open(fileName .. FILE_BKP_EXT, "r")
			if file_bkp ~= nil then
				file  = io.open(fileName, "w")
				file_bkp:seek("set", 0)
				local bkp_data = file_bkp:read("*a")
				file:write(bkp_data)
				file:flush()
				file_bkp:close()
				file:close()
				return bkp_data
			else
				return nil
			end
		end
	else
		--log_print.info("fuck_md：")
		file:seek("set", 0)
		data = file:read("*a")
		file:close()
		return data
	end
end

function fileOpt.write(fileName, data, useBkp)
	--log_print.info(fileName, useBkp)
	if useBkp then
		local fileNameBkp = fileName .. FILE_BKP_EXT
		os.execute("rm " .. fileNameBkp)
		os.execute("cp " .. fileName .. " " .. fileNameBkp)
	end

	local file  = io.open(fileName, "w")
	file:write(data)
	file:flush()
	file:close()
end

return fileOpt