#!/usr/bin/env python3
import sys

oldexcepthook = sys.excepthook
def newexcepthook(type,value,traceback):
	oldexcepthook(type,value,traceback)
	input("Press ENTER to quit.")
sys.excepthook = newexcepthook

import os
p = os.path.join
pUp = os.path.dirname
s = False
if getattr(sys, 'frozen', False) and hasattr(sys, '_MEIPASS'):
	s = os.path.realpath(sys.executable)
else:
	s = os.path.realpath(__file__)
sp = pUp(s)

import configparser
import subprocess
import json
import hashlib
import platform

def readJsonFile(file):
	fileh = open(file,"r")
	data = fileh.read()
	fileh.close()
	return json.loads(data)

def main():
	config = configparser.ConfigParser()
	config.read(os.path.splitext(s)[0] + ".ini")
	
	lv = config["default"]
	for var in lv:
		glbs = globals()
		for glb in glbs:
			lv[var] = lv[var].replace("$+" +glb+ "$",str(glbs[glb]))
		
		lcs = locals()
		for lc in lcs:
			lv[var] = lv[var].replace("$" +lc+ "$",str(lcs[lc]))
	
	if lv["osName"] == "":
		lv["osName"] = platform.system().lower()
		if lv["osName"] == "darwin": lv["osName"] = "macos"
	
	if len(sys.argv) > 1:
		for arg in sys.argv[1:]:
			argSplit = arg.split("=",1)
			if len(argSplit) > 1:
				lv[argSplit[0]] = argSplit[1]
			else:
				lv[argSplit[0]] = True
	
	if not lv["osName"] in ["windows","linux","macos"]:
		print("Warning, unsupported OS detected: " +lv["osName"])
		print("Needs to be either windows, linux or macos. Define it with osName=name in the config.")
		print("")
	if not "version" in lv: lv["version"] = input("Version ID: ")
	if not "name" in lv: lv["name"] = input("Player name: ")
	
	versionPath = p(lv["gamePath"],"versions",lv["version"])
	libraryPath = p(lv["gamePath"],"libraries")
	nativesPath = p(lv["gamePath"],"natives")
	nativesOutPath = p(versionPath,"natives-" +lv["osName"])
	assetsPath = p(lv["gamePath"],"assets")
	
	print("Extracting natives...")
	clientJson = readJsonFile(p(versionPath,lv["version"] + ".json"))
	libraryList = ""
	separator = ";"
	if lv["osName"] != "windows": separator = ":"
	
	for library in clientJson["libraries"]:
		if "artifact" in library["downloads"]:
			library["downloads"]["artifact"]["path"] = library["downloads"]["artifact"]["path"].replace("/",os.path.sep)
			libraryList += p(libraryPath,library["downloads"]["artifact"]["path"]) + separator
		if "classifiers" in library["downloads"]:
			native = False
			if "natives-" +lv["osName"] in library["downloads"]["classifiers"]:
				native = library["downloads"]["classifiers"]["natives-" +lv["osName"]]
			
			if lv["osName"] == "macos" and native == False and "natives-osx" in library["downloads"]["classifiers"]:
				native = library["downloads"]["classifiers"]["natives-osx"]
			
			if native != False:
				native["path"] = native["path"].replace("/",os.path.sep)
				if not os.path.isdir(nativesOutPath): os.makedirs(nativesOutPath)
				subprocess.run(["7z","x",p(nativesPath,native["path"]),"-o" +nativesOutPath,"-aos"],check=True,stdout=subprocess.DEVNULL)
	
	libraryList += p(versionPath,lv["version"] + ".jar")
	#print(libraryList)
	
	launcherVariables = {}
	launcherVariables["auth_player_name"] = lv["name"]
	launcherVariables["version_name"] = lv["version"]
	launcherVariables["game_directory"] = lv["gamePath"]
	launcherVariables["assets_root"] = assetsPath
	launcherVariables["assets_index_name"] = clientJson["assets"]
	launcherVariables["auth_access_token"] = "-"
	launcherVariables["auth_uuid"] = hashlib.md5(lv["name"].encode('utf-8')).hexdigest()
	launcherVariables["user_type"] = "offline"
	launcherVariables["version_type"] = clientJson["type"]
	
	# legacy:
	launcherVariables["game_assets"] = assetsPath
	launcherVariables["auth_session"] = "-"
	
	args = json.loads(lv["jvmArguments"])
	args.append("-Djava.library.path=" +nativesOutPath)
	args.append("-cp")
	args.append(libraryList)
	args.append(clientJson["mainClass"])
	
	if "arguments" in clientJson:
		for arg in clientJson["arguments"]["game"]:
			if type(arg) != str: continue
			for var in launcherVariables:
				arg = arg.replace("${" +var+ "}",launcherVariables[var])
			args.append(arg)
	elif "minecraftArguments" in clientJson:
		margs = clientJson["minecraftArguments"].replace('"',"").split(" ")
		for arg in margs:
			if type(arg) != str: continue
			for var in launcherVariables:
				arg = arg.replace("${" +var+ "}",launcherVariables[var])
			args.append(arg)
	
	print("Launching Minecraft...")
	if lv["console"] == "1":
		subprocess.run([lv["java"]] + args,check = True)
	else:
		pkwargs = {
			"stdout": subprocess.DEVNULL,
			"stdin": subprocess.DEVNULL,
			"stderr": subprocess.DEVNULL,
			"close_fds": True
		}
		if lv["osName"] == "windows": pkwargs["creationflags"] = 0x00000008
		subprocess.Popen([lv["java"] + "w"] + args,**pkwargs)

main()