#!/usr/bin/python3

import atexit
import io
import os
import shutil
import subprocess
import sys
import wget
import sisyphus.checkEnvironment
import sisyphus.getBinhost
import sisyphus.getFilesystem
import sisyphus.killPortage
import sisyphus.resolveDeps
import sisyphus.syncDatabase
import sisyphus.updateAll

def start():
    if sisyphus.checkEnvironment.root():
        sisyphus.updateAll.start()

        isBinhost = sisyphus.getBinhost.start()
        areBinaries,areSources,needsConfig = sisyphus.resolveDeps.world()

        if needsConfig == 0:
            if len(areSources) == 0:
                if not len(areBinaries) == 0:
                    os.chdir(sisyphus.getFilesystem.portageCacheDir)
                    print("\n" + "These are the binary packages that would be merged, in order:" + "\n\n"  + "  ".join(areBinaries) + "\n\n" + "Total:" + " " + str(len(areBinaries)) + " " + "binary package(s)" + "\n")
                    if input("Would you like to proceed?" + " " + "[y/N]" + " ").lower().strip()[:1] == "y":
                        for index, binary in enumerate([package + '.tbz2' for package in areBinaries], start=1):
                            print(">>> Downloading binary ({}".format(index) + " " + "of" + " " + str(len(areBinaries)) + ")" + " " + binary)
                            wget.download(isBinhost + binary)
                            print("\n")

                            if os.path.isdir(os.path.join(sisyphus.getFilesystem.portageCacheDir, binary.rstrip().split("/")[0])):
                                shutil.move(binary.rstrip().split("/")[1], os.path.join(os.path.join(sisyphus.getFilesystem.portageCacheDir, binary.rstrip().split("/")[0]), os.path.basename(binary.rstrip().split("/")[1])))
                            else:
                                os.makedirs(os.path.join(sisyphus.getFilesystem.portageCacheDir, binary.rstrip().split("/")[0]))
                                shutil.move(binary.rstrip().split("/")[1], os.path.join(os.path.join(sisyphus.getFilesystem.portageCacheDir, binary.rstrip().split("/")[0]), os.path.basename(binary.rstrip().split("/")[1])))

                            if os.path.exists(binary.rstrip().split("/")[1]):
                                os.remove(binary.rstrip().split("/")[1])

                        portageExec = subprocess.Popen(['emerge', '--update', '--deep', '--newuse', '--usepkg', '--usepkgonly', '--rebuilt-binaries', '--backtrack=100', '--with-bdeps=y', '--misspell-suggestion=n', '--fuzzy-search=n', '@world'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)

                        for portageOutput in io.TextIOWrapper(portageExec.stdout, encoding="utf-8"):
                            if not "These are the packages that would be merged, in order:" in portageOutput.rstrip():
                                if not "Calculating dependencies" in portageOutput.rstrip():
                                    print(portageOutput.rstrip())

                        stdout, stderr = portageExec.communicate()
                        sisyphus.syncDatabase.syncLocal()
                    else:
                        sys.exit("\n" + "Ok; Quitting." + "\n")
                else:
                    sys.exit("\n" + "No package upgrades found; Quitting." + "\n")
            else:
                sys.exit("\n" + "Source package(s) found in the mix;" + " " + "Use" + " " + "'" + "sisyphus upgrade --ebuild" + "'" + ";" + " " + "Quitting." + "\n")
        else:
            # don't silently fail if a source package requested without the --ebuild option needs a keyword, mask, REQUIRED_USE or USE change
            sys.exit("\n" + "Invalid request;" " " + "Use" + " " + "'" + "sisyphus upgrade --ebuild" + "'" + ";" + " " + "Quitting." + "\n")
    else:
        sys.exit("\nYou need root permissions to do this, exiting!\n")

def startqt():
    isBinhost = sisyphus.getBinhost.start()
    areBinaries,areSources,needsConfig = sisyphus.resolveDeps.world.__wrapped__() #undecorate

    if not len(areSources) == 0:
        print("\n" + "Source package(s) found in the mix;" + " " + "Use sisyphus CLI:" +  " " + "'" + "sisyphus upgrade --ebuild" + "'" + " " + "to perform the upgrade;" + " " + "Aborting." + "\n")
    else:
        if not len(areBinaries) == 0:
            os.chdir(sisyphus.getFilesystem.portageCacheDir)
            print("\n" + "These are the binary packages that will be merged, in order:" + "\n\n" + "  ".join(areBinaries) + "\n\n" + "Total:" + " " + str(len(areBinaries)) + " " + "binary package(s)" + "\n\n")
            for index, binary in enumerate([package + '.tbz2' for package in areBinaries], start=1):
                print(">>> Downloading binary ({}".format(index) + " " + "of" + " " + str(len(areBinaries)) + ")" + " " + binary)
                wget.download(isBinhost + binary)
                print("\n")

                if os.path.isdir(os.path.join(sisyphus.getFilesystem.portageCacheDir, binary.rstrip().split("/")[0])):
                    shutil.move(binary.rstrip().split("/")[1], os.path.join(os.path.join(sisyphus.getFilesystem.portageCacheDir, binary.rstrip().split("/")[0]), os.path.basename(binary.rstrip().split("/")[1])))
                else:
                    os.makedirs(os.path.join(sisyphus.getFilesystem.portageCacheDir, binary.rstrip().split("/")[0]))
                    shutil.move(binary.rstrip().split("/")[1], os.path.join(os.path.join(sisyphus.getFilesystem.portageCacheDir, binary.rstrip().split("/")[0]), os.path.basename(binary.rstrip().split("/")[1])))

                if os.path.exists(binary.rstrip().split("/")[1]):
                    os.remove(binary.rstrip().split("/")[1])

            portageExec = subprocess.Popen(['emerge', '--update', '--deep', '--newuse', '--usepkg', '--usepkgonly', '--rebuilt-binaries', '--backtrack=100', '--with-bdeps=y', '--misspell-suggestion=n', '--fuzzy-search=n', '@world'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
            # kill portage if the program dies or it's terminated by the user
            atexit.register(sisyphus.killPortage.start, portageExec)

            for portageOutput in io.TextIOWrapper(portageExec.stdout, encoding="utf-8"):
                if not "These are the packages that would be merged, in order:" in portageOutput.rstrip():
                    if not "Calculating dependencies" in portageOutput.rstrip():
                        print(portageOutput.rstrip())

            stdout, stderr = portageExec.communicate()
            sisyphus.syncDatabase.syncLocal()
        else:
            print("\n" + "No package upgrades found; Quitting." + "\n")