--[[ Setup Vars ]]--

timeUrl = "http://www.8bittrip.comli.com/time.php"
splitOn = ":"

--[[ Sides for hour/minute connected to terminal ]]--
hourSide = "left"
minSide  = "back"

--[[ Set your colours here ]]--
tl  = colors.lime
t   = colors.lightBlue
tr  = colors.black
m   = colors.orange
bl  = colors.red
b   = colors.white
br  = colors.pink

tl2 = colors.lightGray
t2  = colors.gray
tr2 = colors.green
m2  = colors.blue
bl2 = colors.brown
b2  = colors.cyan
br2 = colors.yellow

--[[ End Vars Setup ]]--

--[[ Code below here should not be altered ]]--
wordHE = tl + tr + m + bl + br + tl2 + t2 + m2 + bl2 + b2
wordLO = tl + bl + b + tl2 + t2 + tr2 + bl2 + b2 + br2
wordSY = tl + t + m + br + b + tl2 + m2 + tr2 + br2 + b2
wordNC = tl + bl + t + tr + br + bl2 + t2 + tl2 + b2


--[[ Standard function to split strings ]]--

function split(str, pat)
   local t = {}  -- NOTE: use {n = 0} in Lua-5.0
   local fpat = "(.-)" .. pat
   local last_end = 1
   local s, e, cap = str:find(fpat, 1)
   while s do
      if s ~= 1 or cap ~= "" then
	 table.insert(t,cap)
      end
      last_end = e+1
      s, e, cap = str:find(fpat, last_end)
   end
   if last_end <= #str then
      cap = str:sub(last_end)
      table.insert(t, cap)
   end
   return t
end

--[[ Standard function (slightly modified) to get URL by Espen ]]--

function httpPullCheck(urlArg, fileArg)

	
	--[[
	HttpTest by Espen v1.3
	An example code to show how to use the ComputerCraft HTTP functions.

	Thanks to Advert for making me aware of the redundant call to http.get after http.request!
	--]]

	--[[ Setting up variables ]] --
	local fileWriteOK
	local url = false
	local filename = false

	local function getHttpBody( url )
			get( url )
			
			while true do
					local event, urle, hBody = os.pullEvent()
					if event == "http_success" then
							print( "HTTP SUCCESS\nURL " )
							return hBody
					else
							
							print( "HTTP FAILURE\nURL , retry in 1min" )    -- If the error is not catched, this will exit the program.
							return nil      -- In case this function is called via pcall.
					end
			end
	end

	local function processHttpBody( hBody, filename )
			local hFile
			
			if hBody then
							local body = hBody.readAll()    -- Read the whole body.
							hFile = io.open( filename, "w" )        -- Open the provided filename for writing.
							hFile:write( body )      -- Write the body to the file.
							hFile:close()   -- Save the changes and close the file.
							hBody.close()   -- Do not know for sure if this is really necessary, but just in case.
			else
					print( "Sorry, no body to process." )
			end
			
			
	end

	local function checkOverwrite( filename )
			term.setCursorBlink( false )
			print("\nWarning: File already exists. Overwrite? (Y/N)")
			
			while true do
							event, choice = os.pullEvent( "char" )  -- Only listen for "char" events.
							if string.lower( choice ) == "y" then return true end
							if string.lower( choice ) == "n" then return false end
			end
	end

	local function printUsage()
			print("Usage:")
			print("httptest <URL> <OUTPUT-FILENAME>")
			print("Example:")
			print("httptest http://www.google.com/ webout")
			print("\nThe response body will then be output into the file 'webout', line for line.")
	end


	--[[ ===== Execution Entry ===== ]]


	--[[ Processing arguments ]]
	if urlArg then url = urlArg end
	if fileArg then filename = fileArg end	
	
	--[[ Making sure all necessary arguments were provided by the user ]]
	if not url or not filename then
			printUsage()
	--elseif not fs.exists( filename ) or checkOverwrite( filename ) then
	else
			processHttpBody( getHttpBody( url ), filename ) --If getHttpBody successfully returns a body, we continue with processing the body and saving it to a file.
			
	end

end

function setDoubleDigits(outputSide, digitsTotal)
		
		
		if digitsTotal < 10 then
			leftDigit = 0
		else
			leftDigit = math.floor(digitsTotal/10)
		end
		
				
		if digitsTotal == 0 then
			rightDigit = 0
		else
			rightDigit = digitsTotal%10
		end
		
		
		--setDigits	
		rs.setBundledOutput(outputSide, leftMixes[leftDigit] + rightMixes[rightDigit])
end

--[[ Mixes of colours to get digits ]]--

rightMixes = { }
rightMixes[0] = tl2 + t2 + tr2 + bl2 + b2 + br2 
rightMixes[1] = tr2 + br2 
rightMixes[2] = t2 + tr2 + m2 + bl2 + b2 
rightMixes[3] = t2 + tr2 + m2 + br2 + b2 
rightMixes[4] = tl2 + tr2 + m2 + br2 
rightMixes[5] = t2 + tl2 + m2 + br2 + b2 
rightMixes[6] = t2 + tl2 + m2 + br2 + bl2 + b2 
rightMixes[7] = t2 + tr2 + br2 
rightMixes[8] = t2 + tl2 + tr2 + m2 + br2 + bl2 + b2 
rightMixes[9] = t2 + tl2 + tr2 + m2 + br2 + b2 

leftMixes = { }
leftMixes[0] = tl + t + tr + bl + b + br 
leftMixes[1] = tr + br 
leftMixes[2] = t + tr + m + bl + b 
leftMixes[3] = t + tr + m + br + b 
leftMixes[4] = tl + tr + m + br 
leftMixes[5] = t + tl + m + br + b 
leftMixes[6] = t + tl + m + br + bl + b 
leftMixes[7] = t + tr + br 
leftMixes[8] = t + tl + tr + m + br + bl + b 
leftMixes[9] = t + tl + tr + m + br + b 

--[[ Program starts here ]]--

firstRun = true
lastSync = 0
splitTime = { }
 
 --[[ Display "HELO" and delay to ready HTTP API ]]--
 
print("System sync prep...")
rs.setBundledOutput(hourSide, wordHE)
rs.setBundledOutput(minSide, wordLO)
sleep(10.0)
 
 --[[ Loop runs once every 60 secs, time updates once every hour ]]--
 
while true do
		
		--[[ Sync time every 60min/first run ]]--
		
		if firstRun or 	lastSync >= 60 then
			
			rs.setBundledOutput(hourSide, wordSY)
			rs.setBundledOutput(minSide, wordNC)
			
			sleep(10.0)
			httpPullCheck(timeUrl,"time")
			
			if fs.exists( "time" ) then 
		
				h = fs.open("time","r") 
			
				newTime = h.readLine()
				
				h:close()
				
				lastSync = 0
				firstRun = false
				
			end
			
		end
		
		--[[ Check that newTime exists, else print 00:00 ]]--
		
		print(newTime)
		if lastSync == 0 and newTime then
			splitTime = split(newTime, splitOn)	
			splitTime[1] = tonumber(splitTime[1])
			splitTime[2] = tonumber(splitTime[2]) -1 
		elseif not newTime then
			splitTime[1] = 0
			splitTime[2] = -1
		end
		
		--[[ Increase minute by 1 ]]--
		
		splitTime[2] = splitTime[2] + 1

		--[ Increase hour if needed ]--
		
		if splitTime[2] >= 60 then
			splitTime[2] = 0
			if splitTime[1] == 23 then
				splitTime[1] = 0
			else 
				splitTime[1] = splitTime[1] + 1
			end
		end
					
			
		--[[ Print time check and run digit set functions ]]--
		
		print("Updating time to: "..splitTime[1]..":"..splitTime[2])		
		
		--Begin set hour
		setDoubleDigits(hourSide, splitTime[1])
		
		--Begin set minute
		setDoubleDigits(minSide, splitTime[2])
			
		print("Time set, last sync "..lastSync.."min ago.")
		
		--[[ Sleep for 1min before running again ]]--
		os.sleep(60.0)
		lastSync = lastSync + 1
		   
end