""" Pulls in the new version of PagerMaid from the git server. """

import platform
from datetime import datetime
from os import remove
from subprocess import run, PIPE
from sys import executable

from git import Repo
from git.exc import GitCommandError, InvalidGitRepositoryError, NoSuchPathError

from pagermaid import log
from pagermaid.listener import listener
from pagermaid.utils import execute, lang, alias_command


@listener(is_plugin=False, incoming=True, owners_only=True, command=alias_command("update"),
          description=lang('update_des'),
          parameters="<true/debug>")
async def update(context):
    if len(context.parameter) > 1:
        await context.reply(lang('arg_error'))
        return
    msg = await context.reply(lang('update_processing'))
    parameter = None
    changelog = None
    if len(context.parameter) == 1:
        parameter = context.parameter[0]

    if parameter:
        if parameter == "debug":
            # Version info
            git_version = run("git --version", stdout=PIPE, shell=True).stdout.decode().strip().replace("git version ",
                                                                                                        "")
            git_change = bool(run("git diff-index HEAD --", stdout=PIPE, shell=True).stdout.decode().strip())
            git_change = "是" if git_change else "否"
            git_date = run("git log -1 --format='%at'", stdout=PIPE, shell=True).stdout.decode()
            git_date = datetime.utcfromtimestamp(int(git_date)).strftime("%Y/%m/%d %H:%M:%S")
            git_hash = run("git rev-parse --short HEAD", stdout=PIPE, shell=True).stdout.decode().strip()
            get_hash_link = f"https://github.com/Xtao-Labs/PagerMaid-Modify/commit/{git_hash}"
            # Generate the text
            text = f"{lang('status_platform')}: {str(platform.platform())}\n" \
                   f"{lang('update_platform_version')}: {str(platform.version())}\n" \
                   f"{lang('status_python')}: {str(platform.python_version())}\n" \
                   f"{lang('update_git_version')}: {git_version}\n" \
                   f"{lang('update_local_git_change')}: {git_change}\n" \
                   f"{lang('update_hash')}: [{git_hash}]({get_hash_link})\n" \
                   f"{lang('update_date')}: {git_date} "
            await msg.edit(text)
            return

    try:
        repo = Repo()
    except NoSuchPathError as exception:
        await msg.edit(f"{lang('update_NoSuchPathError')} {exception}")
        return
    except InvalidGitRepositoryError:
        await msg.edit(lang('update_InvalidGitRepositoryError'))
        return
    except GitCommandError as exception:
        await msg.edit(f'{lang("update_GitCommandError")} :`{exception}`')
        return

    active_branch = repo.active_branch.name
    if not await branch_check(active_branch):
        await msg.edit(
            f"{lang('update_not_active_branch')}: {active_branch}.")
        return

    try:
        repo.create_remote('upstream', git_ssh)
    except BaseException:
        pass
    try:
        upstream_remote = repo.remote('upstream')
        upstream_remote.fetch(active_branch)
    except GitCommandError:
        await msg.edit(lang('update_failed'))
        return
    try:
        changelog = await changelog_gen(repo, f'HEAD..upstream/{active_branch}')
    except:
        distribution = await execute('lsb_release -a')
        if distribution.find('Ubuntu') != -1 or distribution.find('Debain') != -1:
            try:
                await execute('apt-get install --upgrade git -y')
            except:
                await msg.edit(lang('update_failed') + '\n' + lang('update_auto_upgrade_git_failed_ubuntu'))
                return
        elif distribution.find('Cent') != -1:
            try:
                await execute('yum install git -y')
            except:
                await msg.edit(lang('update_failed') + '\n' + lang('update_auto_upgrade_git_failed_cent'))
                return
        else:
            try:
                await execute('apt-get install --upgrade git -y')
                await execute('yum install git -y')
            except:
                pass
        await msg.edit(lang('update_auto_upgrade_git_hint'))

    if not parameter:
        if not changelog:
            await msg.edit(
                f"`PagerMaid-Modify {lang('update_in_branch')} ` **{active_branch}**` {lang('update_is_updated')}`")
            return
        changelog_str = f'**{lang("update_found_update_in_branch")} {active_branch}.\n\n{lang("update_change_log")}:**\n`{changelog}`'
        if len(changelog_str) > 4096:
            await msg.edit(lang('update_log_too_big'))
            file = open("output.log", "w+")
            file.write(changelog_str)
            file.close()
            await context.client.send_file(
                context.chat_id,
                "output.log",
                reply_to=context.id,
            )
            remove("output.log")
        else:
            await msg.edit(changelog_str + f"\n**{lang('update_hint')}**\n`-update true`")
        return

    await msg.edit(lang('update_found_pulling'))

    try:
        try:
            upstream_remote.pull(active_branch)
        except:
            await execute("""git status | grep modified | sed -r "s/ +/ /" | cut -f2 | awk -F " " '{print "mkdir -p 
            $(dirname ../for-update/" $2 ") && mv " $2 " ../for-update/" $2}' | sh""")
            await execute("git pull")
            await execute("""cd ../for-update/ && find -H . -type f | awk '{print "cp " $1 " ../PagerMaid-Modify/" 
            $1}' | sh && cd ../PagerMaid-Modify""")
            await execute("rm -rf ../for-update/")
        await execute(f"{executable} -m pip install -r requirements.txt --upgrade")
        await execute(f"{executable} -m pip install -r requirements.txt")
        await log(f"PagerMaid-Modify {lang('update_is_updated')}")
        await msg.edit(lang('update_success') + lang('apt_reboot'))
        await context.client.disconnect()
    except GitCommandError:
        upstream_remote.git.reset('--hard')
        await log(lang('update_failed'))
        await msg.edit(lang('update_failed') + lang('apt_reboot'))
        await context.client.disconnect()


async def changelog_gen(repo, diff):
    result = ''
    d_form = "%d/%m/%y"
    for c in repo.iter_commits(diff):
        result += f'•[{c.committed_datetime.strftime(d_form)}]: {c.summary} <{c.author}>\n'
    return result


async def branch_check(branch):
    official = ['master', 'dev']
    for k in official:
        if k == branch:
            return 1
    return