import sys
import os
import importlib
from collections import OrderedDict

def initConfigDirs():
	for i in configDirs:
		fi = os.path.join(i,"modules")
		try:
			del sys.path[sys.path.index(fi)]
		except Exception:
			pass
	
	for i in reversed(configDirs):
		sys.path.insert(0,os.path.join(i,"modules"))

def configFindFile(name):
	for i in configDirs:
		fi = os.path.join(i,name)
		if os.path.isfile(fi): yield fi

def parseVariables(st):
	rtn = OrderedDict()
	st = st.replace("\r","").split("\n")
	for line in st:
		line = line.split("#",1)[0]
		line = line.strip(" \t")
		line = line.split("=",1)
		if len(line) < 2: continue
		line[0] = line[0].strip(" \t")
		line[1] = line[1].strip(" \t")
		rtn[line[0]] = line[1]
	return rtn

def loadmod(mod):
	global distro
	return importlib.import_module(distro + "." + mod)

def init(scp,dist):
	global mod,distro,p,s,sd,configDirs
	mod = {}
	distro = dist
	p = os.path.join
	s = scp
	sd = os.path.dirname(s)
	configDirs = [
		p(os.environ.get("HOME",os.environ.get("USERPROFILE",None)),".config",distro),
		p(sd,"user")
	]
	
	initConfigDirs()
	modules = {}
	for file in configFindFile("modules.txt"):
		tbl = parseVariables(open(file).read())
		for i in tbl:
			if not i in modules:
				modules[i] = tbl[i]
	
	length = len(sys.argv)
	index = 1
	while index < length:
		arg = sys.argv[index]
		if arg.startswith("--app:module"):
			arg = arg.split("--app:module:",1)[1].split("=",1)
			modules[arg[0]] = arg[1].replace("$DISTRO",distro)
			del sys.argv[index]
			length -= 1
			continue
		index += 1
	
	glb = globals()
	for module in modules:
		modules[module] = modules[module].replace("$DISTRO",distro)
		print("* Importing '" +modules[module]+ "' -> '" +module+ "' ...")
		mod[module] = importlib.import_module(modules[module])
	
	for module in modules:
		if hasattr(mod[module],"appInit"):
			print("* Initializing '" +module+ "' ...")
			mod[module].appInit()
	
	print("* Running app.")