#!/usr/bin/python3

import re

import os

import sys
from hashlib import sha256
from github import Github
import json
import argparse

parser = argparse.ArgumentParser(description="Make a new ripme release on github")
parser.add_argument("-f", "--file", help="Path to the version of ripme to release")
parser.add_argument("-t", "--token", help="Your github personal access token")
parser.add_argument("-d", "--debug", help="Run in debug mode", action="store_true")
parser.add_argument("-n", "--non-interactive", help="Do not ask for any input from the user", action="store_true")
args = parser.parse_args()

try:
    input = raw_input
except NameError:
    pass


# Make sure the file the user selected is a jar
def isJar(filename):
    if debug:
        print("Checking if {} is a jar file".format(filename))
    return filename.endswith("jar")


# Returns true if last entry to the "changeList" section of ripme.json is in the format of $number.$number.$number: and
# false if not
def isValidCommitMessage(message):
    if debug:
        print("Checking if {} matchs pattern ^\d+\.\d+\.\d+:".format(message))
    pattern = re.compile("^\d+\.\d+\.\d+:")
    return re.match(pattern, message)


ripmeJson = json.loads(open("ripme.json").read())
fileToUploadPath = args.file
InNoninteractiveMode = args.non_interactive
commitMessage = ripmeJson.get("changeList")[0]
releaseVersion = ripmeJson.get("latestVersion")
debug = args.debug
accessToken = args.token
repoOwner = "ripmeapp"
repoName = "ripme"

if not os.path.isfile(fileToUploadPath):
    print("[!] Error: {} does not exist".format(fileToUploadPath))
    sys.exit(1)

if not isJar(fileToUploadPath):
    print("[!] Error: {} is not a jar file!".format(fileToUploadPath))
    sys.exit(1)

if not isValidCommitMessage(commitMessage):
    print("[!] Error: {} is not a valid commit message as it does not start with a version".format(fileToUploadPath))
    sys.exit(1)

ripmeUpdate = open(fileToUploadPath, mode='rb').read()

# The hash that we expect the update to have
expectedHash = ripmeJson.get("currentHash")

# The actual hash of the file on disk
actualHash = sha256(ripmeUpdate).hexdigest()

# Make sure that the hash of the file we're uploading matches the hash in ripme.json. These hashes not matching will
# cause ripme to refuse to install the update for all users who haven't disabled update hash checking
if expectedHash != actualHash:
    print("[!] Error: expected hash of file and actual hash differ")
    print("[!] Expected hash is {}".format(expectedHash))
    print("[!] Actual hash is {}".format(actualHash))
    sys.exit(1)

# Ask the user to review the information before we precede
# This only runs in we're in interactive mode
if not InNoninteractiveMode:
    print("File path: {}".format(fileToUploadPath))
    print("Release title: {}".format(commitMessage))
    print("Repo: {}/{}".format(repoOwner, repoName))
    input("\nPlease review the information above and ensure it is correct and then press enter")

print("Accessing github using token")
g = Github(accessToken)


print("Creating release")
release = g.get_user(repoOwner).get_repo(repoName).create_git_release(releaseVersion, commitMessage, "")

print("Uploading file")
release.upload_asset(fileToUploadPath, "ripme.jar")