#!/usr/bin/env python3

import subprocess
import sys
import signal
import os
import stat
import pathlib



neededmodules = [
	"bottle",
	"waitress",
	"setproctitle",
	"doreah",
	"nimrodel"
]

recommendedmodules = [
	"wand"
]

SOURCE_URL = "https://github.com/krateng/maloja/archive/master.zip"



def blue(txt): return "\033[94m" + txt + "\033[0m"
def green(txt): return "\033[92m" + txt + "\033[0m"
def yellow(txt): return "\033[93m" + txt + "\033[0m"

## GOTODIR			goes to directory that seems to have a maloja install
## SETUP			assumes correct directory. sets settings and key
## INSTALL			ignores local files, just installs prerequisites
## START			INSTALL - GOTODIR - SETUP - starts process
## RESTART			STOP - START
## STOP				Stops process
## UPDATE			GOTODIR - updates from repo
## LOADLASTFM		GOTODIR - imports csv data
## INSTALLHERE		makes this directory valid - UPDATE - INSTALL - SETUP

def gotodir():
	if os.path.exists("./server.py"):
		return True
	elif os.path.exists("/opt/maloja/server.py"):
		os.chdir("/opt/maloja/")
		return True

	print("Maloja installation could not be found.")
	return False

def setup():

	from doreah import settings

	# EXTERNAL API KEYS
	apikeys = {
		"LASTFM_API_KEY":"Last.fm API Key",
		"FANARTTV_API_KEY":"Fanart.tv API Key",
		"SPOTIFY_API_ID":"Spotify Client ID",
		"SPOTIFY_API_SECRET":"Spotify Client Secret"
	}

	print("Various external services can be used to display images. If not enough of them are set up, only local images will be used.")
	for k in apikeys:
		key = settings.get_settings(k)
		if key is None:
			print("\t" + "Currently not using a " + apikeys[k] + " for image display.")
		elif key == "ASK":
			print("\t" + "Please enter your " + apikeys[k] + ". If you do not want to use one at this moment, simply leave this empty and press Enter.")
			key = input()
			if key == "": key = None
			settings.update_settings("settings/settings.ini",{k:key},create_new=True)
		else:
			print("\t" + apikeys[k] + " found.")


	# OWN API KEY
	if os.path.exists("./clients/authenticated_machines.tsv"):
		pass
	else:
		print("Do you want to set up a key to enable scrobbling? Your scrobble extension needs that key so that only you can scrobble tracks to your database. [Y/n]")
		answer = input()
		if answer.lower() in ["y","yes","yea","1","positive","true",""]:
			import random
			key = ""
			for i in range(64):
				key += str(random.choice(list(range(10)) + list("abcdefghijklmnopqrstuvwxyz") + list("ABCDEFGHIJKLMNOPQRSTUVWXYZ")))
			print("Your API Key: " + yellow(key))
			with open("./clients/authenticated_machines.tsv","w") as keyfile:
				keyfile.write(key + "\t" + "Default Generated Key")
		elif answer.lower() in ["n","no","nay","0","negative","false"]:
			pass

def install():
	toinstall = []
	toinstallr = []
	for m in neededmodules:
		try:
			exec("import " + m) #I'm sorry
		except:
			toinstall.append(m)

	for m in recommendedmodules:
		try:
			exec("import " + m)
		except:
			toinstallr.append(m)

	if toinstall != []:
		print("The following python modules need to be installed:")
		for m in toinstall:
			print("\t" + yellow(m))
	if toinstallr != []:
		print("The following python modules are highly recommended, some features will not work without them:")
		for m in toinstallr:
			print("\t" + yellow(m))

	if toinstall != [] or toinstallr != []:
		if os.geteuid() != 0:
			print("You can install them with",yellow("pip install -r requirements.txt"),"or Maloja can try to install them automatically. For this, you need to run this script as a root user.")
			return False
		else:
			print("You can install them with",yellow("pip install -r requirements.txt"),"or Maloja can try to install them automatically, This might or might not work / bloat your system / cause a nuclear war.")
			fail = False
			if toinstall != []:
				print("Attempt to install required modules? [Y/n]")
				answer = input()

				if answer.lower() in ["y","yes","yea","1","positive","true",""]:
					for m in toinstall:
						try:
							print("Installing " + m + " with pip...")
							from pip._internal import main as pipmain
							#os.system("pip3 install " + m)
							pipmain(["install",m])
							print("Success!")
						except:
							print("Failure!")
							fail = True

				elif answer.lower() in ["n","no","nay","0","negative","false"]:
					return False #if you dont want to auto install required, you probably dont want to install recommended
				else:
					print("What?")
					return False
			if toinstallr != []:
				print("Attempt to install recommended modules? [Y/n]")
				answer = input()

				if answer.lower() in ["y","yes","yea","1","positive","true",""]:
					for m in toinstallr:
						try:
							print("Installing " + m + " with pip...")
							from pip._internal import main as pipmain
							#os.system("pip3 install " + m)
							pipmain(["install",m])
							print("Success!")
						except:
							print("Failure!")
							fail = True

				elif answer.lower() in ["n","no","nay","0","negative","false"]:
					return False
				else:
					print("What?")
					return False

			if fail: return False
			print("All modules successfully installed!")
			print("Run the script again (without root) to start Maloja.")
			return False

	else:
		print("All necessary modules seem to be installed.")
		return True

def getInstance():
	try:
		output = subprocess.check_output(["pidof","Maloja"])
		pid = int(output)
		return pid
	except:
		return None

def getInstanceSupervisor():
	try:
		output = subprocess.check_output(["pidof","maloja_supervisor"])
		pid = int(output)
		return pid
	except:
		return None

def start():
	if install():

		if gotodir():
			setup()
			p = subprocess.Popen(["python3","server.py"],stdout=subprocess.DEVNULL,stderr=subprocess.DEVNULL)
			p = subprocess.Popen(["python3","supervisor.py"],stdout=subprocess.DEVNULL,stderr=subprocess.DEVNULL)
			print(green("Maloja started!") + " PID: " + str(p.pid))

			from doreah import settings
			port = settings.get_settings("WEB_PORT")

			print("Visit your server address (Port " + str(port) + ") to see your web interface. Visit /setup to get started.")
			print("If you're installing this on your local machine, these links should get you there:")
			print("\t" + blue("http://localhost:" + str(port)))
			print("\t" + blue("http://localhost:" + str(port) + "/setup"))
			return True
		#else:
		#	os.chdir("/opt/maloja/")
		#	p = subprocess.Popen(["python3","server.py"],stdout=subprocess.DEVNULL,stderr=subprocess.DEVNULL)
		#	print("Maloja started! PID: " + str(p.pid))
		#	return True

		print("Error while starting Maloja.")
		return False

def restart():
	#pid = getInstance()
	#if pid == None:
	#	print("Server is not running.")
	#else:
	#	stop()
	#start()

	wasrunning = stop()
	start()
	return wasrunning

def stop():
	pid_sv = getInstanceSupervisor()
	if pid_sv is not None:
		os.kill(pid_sv,signal.SIGTERM)

	pid = getInstance()
	if pid is None:
		print("Server is not running")
		return False
	else:
		os.kill(pid,signal.SIGTERM)
		print("Maloja stopped! PID: " + str(pid))
		return True

def update():

	import urllib.request
	import shutil
	#import tempfile
	import zipfile
	import distutils.dir_util

	if not gotodir(): return False

	if os.path.exists("./.dev"):
		print("Better not overwrite the development server!")
		return

	print("Updating Maloja...")
	#with urllib.request.urlopen(SOURCE_URL) as response:
	#	with tempfile.NamedTemporaryFile(delete=True) as tmpfile:
	#		shutil.copyfileobj(response,tmpfile)
	#
	#		with zipfile.ZipFile(tmpfile.name,"r") as z:
	#
	#			for f in z.namelist():
	#				#print("extracting " + f)
	#				z.extract(f)


	os.system("wget " + SOURCE_URL)
	with zipfile.ZipFile("./master.zip","r") as z:

		# if we ever have a separate directory for the code
		# (the calling update script is not the same version as the current
		# remote repository, so we better add this check just in case)
		if "source/" in z.namelist():
			for f in z.namelist():
				if f.startswith("source/"):
					z.extract(f)
			for dir,_,files in os.walk("source"):
				for f in files:
					origfile = os.path.join(dir,f)
					newfile = ps.path.join(dir[7:],f)
					os.renames(origfile,newfile) #also prunes empty directory
		else:
			for f in z.namelist():
				z.extract(f)

	os.remove("./master.zip")


	distutils.dir_util.copy_tree("./maloja-master/","./",verbose=2)
	shutil.rmtree("./maloja-master")
	print("Done!")

	os.chmod("./maloja",os.stat("./maloja").st_mode | stat.S_IXUSR)
	os.chmod("./update_requirements.sh",os.stat("./update_requirements.sh").st_mode | stat.S_IXUSR)

	try:
		returnval = os.system("./update_requirements.sh")
		assert returnval == 0
	except:
		print("Make sure to update required modules! (" + yellow("./update_requirements.sh") + ")")

	if stop(): start() #stop returns whether it was running before, in which case we restart it

def loadlastfm():

	try:
		filename = sys.argv[2]
		filename = os.path.abspath(filename)
	except:
		print("Please specify a file!")
		return

	if gotodir():
		if os.path.exists("./scrobbles/lastfmimport.tsv"):
			print("Already imported Last.FM data. Overwrite? [y/N]")
			if input().lower() in ["y","yes","yea","1","positive","true"]:
				pass
			else:
				return
		print("Please wait...")
		os.system("python3 ./lastfmconverter.py " + filename + " ./scrobbles/lastfmimport.tsv")
		print("Successfully imported your Last.FM scrobbles!")

def installhere():
	if len(os.listdir()) > 1:
		print("You should install Maloja in an empty directory.")
		return False
	else:
		open("server.py","w").close()
		# if it's cheese, but it works, it ain't cheese
		update()
		install()
		setup()

		print("Maloja installed! Start with " + yellow("./maloja start"))


if __name__ == "__main__":
	if sys.argv[1] == "start": restart()
	elif sys.argv[1] == "restart": restart()
	elif sys.argv[1] == "stop": stop()
	elif sys.argv[1] == "update": update()
	elif sys.argv[1] == "import": loadlastfm()
	elif sys.argv[1] == "install": installhere()
	else: print("Valid commands: start restart stop update import install")