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--[[ /gitget
GitHub downloading utility for CC.
Developed by apemanzilla.

If you want to use this as an automated installer, please see lines 13 and 23.

This requires ElvishJerricco's JSON parsing API.
Direct link: http://pastebin.com/raw.php?i=4nRg9CHU
]]--

local args = {...}

--Remove the line above this and change the lines below to use automated mode.
local automated = true							-- Don't touch!
local hide_progress = true						-- If true, will not list out files as they are downloaded
args[1] = "SuicidalSTDZ"							-- Github username
args[2] = "EnderAPI"								-- Github repo name
args[3] = "master"									-- Branch - defaults to "master"
args[4] = "/EnderAPI/"..args[3].."/"									-- Path - defaults to root ("/")
local pre_dl = "print('Downloading Ender API...')"	-- Command(s) to run before download starts.
local post_dl = "print('Downloaded Core Files...')"
--local post_dl = "dofile('/EnderAPI/"..args[3].."/install')"	-- Command(s) to run after download completes.
--Remove the line below this and change the lines below to use automated mode.


args[3] = args[3] or "master"
args[4] = args[4] or ""

if not automated and #args < 2 then
	print("Usage:\n"..shell.getRunningProgram().." <user> <repo> [branch=master] [path=/]") error()
end

local function save(data,file)
	local file = shell.resolve(file)
	if not (fs.exists(string.sub(file,1,#file - #fs.getName(file))) and fs.isDir(string.sub(file,1,#file - #fs.getName(file)))) then
		if fs.exists(string.sub(file,1,#file - #fs.getName(file))) then fs.delete(string.sub(file,1,#file - #fs.getName(file))) end
		fs.makeDir(string.sub(file,1,#file - #fs.getName(file)))
	end
	local f = fs.open(file,"w")
	f.write(data)
	f.close()
end

local function download(url, file)
	save(http.get(url).readAll(),file)
end

local function pullDir(tbl)
	for k,v in pairs(tbl) do
		if v.type == "dir" then
			if not hide_progress then print(""..v.path.."/") end
			pullDir(json.decode(http.get(v._links.self).readAll()))
		else
			if v.path ~= "readme.md" then
				if not hide_progress then print(""..v.path) end
				download("https://raw.github.com/"..args[1].."/"..args[2].."/"..args[3].."/"..v.path,fs.combine(args[4],v.path))
			end
		end
	end
end

if not json then
	print("Downloading JSON api...\n(Credits to ElvishJerricco!)")
	download("http://pastebin.com/raw.php?i=4nRg9CHU","json")
	os.loadAPI("json")
end

--[[
EnderAPI Update and Loading Script
]]

local function loadAPIs( bShow )
  if bShow then
    print( "Loading APIs.." )
  end
  local tAPIs = {
  TextAPI = { success = os.loadAPI( "/EnderAPI/master/apis/text" ) },
  NumberAPI = { success = os.loadAPI( "/EnderAPI/master/apis/number" ) },
  ColorAPI = { success = os.loadAPI( "/EnderAPI/master/apis/color" ) },
  ColourAPI = { success = os.loadAPI( "/EnderAPI/master/apis/colour" ) },
  PastebinAPI = { success = os.loadAPI( "/EnderAPI/master/apis/pastebin" ) },
  MessageBoxAPI = { success = os.loadAPI( "/EnderAPI/master/apis/messageBox" ) }
  }
  for k, v in pairs( tAPIs ) do
    if not v.success then
      if bShow then
        printError( "Failed to load " .. tostring( k ) )
      end
    else
      if bShow then
        term.setTextColour( colours.lime )
        print( "Loaded " .. tostring( k ) )
      end
    end
  end
  if bShow then
    term.setTextColour( colours.white )
  end
end

local function update()
  if pre_dl then loadstring(pre_dl)() else print("Downloading files from github....") end
  pullDir(json.decode(http.get("https://api.github.com/repos/"..args[1].."/"..args[2].."/contents/?ref="..args[3]).readAll()))
  if post_dl then loadstring(post_dl)() end
end

--# Main Script
if fs.exists( "/EnderAPI/master/config" ) then
  os.loadAPI( "/EnderAPI/master/config" )
  local bShow = config.returnVars().showUpdateStatus
  if config.returnVars().shouldAutoUpdate then
    if bShow then
      write( "Checking for updates\n" )
    end
  end

  --# Check for any available updates, if showAutoUpdate is true
  if config.returnVars().shouldAutoUpdate then
    update()
  end
else
	--# EnderAPI is not installed, download necessary files
	update()
end

--# Load EnderAPI
os.loadAPI( "/EnderAPI/master/config" )
loadAPIs( config.returnVars().showUpdateStatus )