#!/usr/bin/env python3
import sys
import os
import subprocess
import configparser
import readline
readline.parse_and_bind("tab: complete")

sp = os.path.dirname(os.path.realpath(__file__))
p = os.path.join

#initializing the default configuration
config = configparser.ConfigParser()
config["DEFAULT"] = {
	"prefixLocation":	"$sd+/prefixes",
	"homeLocation":		"$config:DEFAULT/prefixLocation+/+$prefix+/home"
}

configVars = {
	"sd":	sp,
	"cd":	os.getcwd()
}

def walklevel(some_dir, level=0):
	some_dir = some_dir.rstrip(os.path.sep)
	assert os.path.isdir(some_dir)
	num_sep = some_dir.count(os.path.sep)
	for root, dirs, files in os.walk(some_dir):
		yield root, dirs, files
		num_sep_this = root.count(os.path.sep)
		if num_sep + level <= num_sep_this:
			del dirs[:]

def loadConfig():
	global config
	config.read(p(sp,"fwinebox.ini"))

def parseConfigValue(line):
	out = ""
	valList = line.split("+")
	for value in valList:
		if (value[0] == "$"):
			value = value[1:]
			if (value.startswith("config:")):
				value = value[len("config:"):]
				value = value.split("/")
				value = parseConfigValue(config[value[0]][value[1]])
				out = out + value
				continue
				
			out = out + configVars[value]
			continue
		
		out = out + value
	
	#input("parsed: " +out)
	return out

cv = parseConfigValue

def launchPrefix(prefix,cmd,raw = False):
	configVars["prefix"] = prefix
	home = os.environ["HOME"]
	os.environ["HOME"] = cv(config["DEFAULT"]["homeLocation"])
	os.environ["WINEPREFIX"] = p(cv(config["DEFAULT"]["prefixLocation"]),prefix)
	subprocess.call(cmd)
	os.environ["HOME"] = home
	del os.environ["WINEPREFIX"]
	del configVars["prefix"]
	
def finput(dir,text = ""):
	cd = os.getcwd()
	os.chdir(dir)
	inp = input(text)
	if (len(inp) > 0):
		if (inp[len(inp) - 1]) == "/": inp = inp[:len(inp) - 1]
	os.chdir(cd)
	return inp

def main():
	args = sys.argv[1:]	
	if args != []:
		prefixLocation = cv(config["DEFAULT"]["prefixLocation"])
		if not os.path.isdir(p(prefixLocation,args[0])):
			print("error: prefix does not exist")
			return
		
		cmd = ["bash"]
		if (len(args) > 1):
			cmd = args[1:]
		
		launchPrefix(args[0],cmd)
		return
	
	while True:
		prefixLocation = cv(config["DEFAULT"]["prefixLocation"])
		if not (os.path.isdir(prefixLocation)):
			os.makedirs(prefixLocation)
		
		print("list of prefixes:")
		for root,dirs,files in walklevel(prefixLocation):
			for dir in dirs:
				print(dir)
		
		prefix = finput(prefixLocation,"\nprefix: ")
		prefixFolder = p(prefixLocation,prefix)
		
		if not os.path.isdir(prefixFolder):
			while True:
				print("\nthis wine-prefix does not exist yet, would you like to create it? (y/n)")
				choice = input().lower()
				if (choice == "n"): print(""); break
				if (choice != "y"): continue
				
				while True:
					print("\n(6)4 or (3)2 bit?")
					choice = input().lower()
					syswow = False
					if (choice == "6"):
						syswow = True
					elif (choice != "3"): continue
					os.makedirs(prefixFolder)
					if (syswow == False): os.environ["WINEARCH"] = "win32"
					launchPrefix(prefix,["wine","winecfg"])
					if "WINEARCH" in os.environ: del os.environ["WINEARCH"]
					break
				
				break
		
		if os.path.isdir(prefixFolder):
			print("\nlaunching " +prefix+ "...")
			try:
				launchPrefix(prefix,["bash"])
			except KeyboardInterrupt:
				pass
			print("\nended wine-session")
			return

if __name__ == "__main__":
	loadConfig()
	main()