#!/usr/bin/env python2
# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:ai
from __future__ import absolute_import, division, print_function, unicode_literals

__license__ = 'GPL v3'
__copyright__ = '2011, Kovid Goyal <kovid@kovidgoyal.net>'
__docformat__ = 'restructuredtext en'

import os, time, sys, shutil, json, mimetypes
from pprint import pprint
from argparse import ArgumentParser, FileType
from subprocess import check_call
from collections import OrderedDict


class ReadFileWithProgressReporting(file):  # {{{

    def __init__(self, path, mode='rb'):
        file.__init__(self, path, mode)
        self.seek(0, os.SEEK_END)
        self._total = self.tell()
        self.seek(0)
        self.start_time = time.time()

    def __len__(self):
        return self._total

    def read(self, size):
        data = file.read(self, size)
        if data:
            self.report_progress(len(data))
        return data

    def report_progress(self, size):
        sys.stdout.write(b'\x1b[s')
        sys.stdout.write(b'\x1b[K')
        frac = float(self.tell()) / self._total
        mb_pos = self.tell() / float(1024**2)
        mb_tot = self._total / float(1024**2)
        kb_pos = self.tell() / 1024.0
        kb_rate = kb_pos / (time.time() - self.start_time)
        bit_rate = kb_rate * 1024
        eta = int((self._total - self.tell()) / bit_rate) + 1
        eta_m, eta_s = eta / 60, eta % 60
        sys.stdout.write(
            '  %.1f%%   %.1f/%.1fMB %.1f KB/sec    %d minutes, %d seconds left' %
            (frac * 100, mb_pos, mb_tot, kb_rate, eta_m, eta_s)
        )
        sys.stdout.write(b'\x1b[u')
        if self.tell() >= self._total:
            sys.stdout.write('\n')
            t = int(time.time() - self.start_time) + 1
            print(
                'Upload took %d minutes and %d seconds at %.1f KB/sec' %
                (t / 60, t % 60, kb_rate)
            )
        sys.stdout.flush()


# }}}


class Base(object):  # {{{

    def __init__(self):
        self.d = os.path.dirname
        self.j = os.path.join
        self.a = os.path.abspath
        self.b = os.path.basename
        self.s = os.path.splitext
        self.e = os.path.exists

    def info(self, *args, **kwargs):
        print(*args, **kwargs)
        sys.stdout.flush()

    def warn(self, *args, **kwargs):
        print('\n' + '_' * 20, 'WARNING', '_' * 20)
        print(*args, **kwargs)
        print('_' * 50)
        sys.stdout.flush()


# }}}


class SourceForge(Base):  # {{{

    # Note that you should manually ssh once to username,project@frs.sourceforge.net
    # on the staging server so that the host key is setup

    def __init__(self, files, project, version, username, replace=False):
        self.username, self.project, self.version = username, project, version
        self.base = '/home/frs/project/c/ca/' + project
        self.rdir = self.base + '/' + version
        self.files = files

    def __call__(self):
        for x in self.files:
            start = time.time()
            self.info('Uploading', x)
            for i in range(5):
                try:
                    check_call([
                        'rsync', '-h', '-z', '--progress', '-e', 'ssh -x', x,
                        '%s,%s@frs.sourceforge.net:%s' %
                        (self.username, self.project, self.rdir + '/')
                    ])
                except KeyboardInterrupt:
                    raise SystemExit(1)
                except:
                    print('\nUpload failed, trying again in 30 seconds')
                    time.sleep(30)
                else:
                    break
            print('Uploaded in', int(time.time() - start), 'seconds\n\n')


# }}}


class GitHub(Base):  # {{{

    API = 'https://api.github.com/'

    def __init__(self, files, reponame, version, username, password, replace=False):
        self.files, self.reponame, self.version, self.username, self.password, self.replace = (
            files, reponame, version, username, password, replace
        )
        self.current_tag_name = 'v' + self.version
        import requests
        self.requests = s = requests.Session()
        s.auth = (self.username, self.password)
        s.headers.update({'Accept': 'application/vnd.github.v3+json'})

    def __call__(self):
        releases = self.releases()
        self.clean_older_releases(releases)
        release = self.create_release(releases)
        upload_url = release['upload_url'].partition('{')[0]
        existing_assets = self.existing_assets(release['id'])
        for path, desc in self.files.items():
            self.info('')
            url = self.API + 'repos/%s/%s/releases/assets/{}' % (
                self.username, self.reponame
            )
            fname = os.path.basename(path)
            if fname in existing_assets:
                self.info(
                    'Deleting %s from GitHub with id: %s' %
                    (fname, existing_assets[fname])
                )
                r = self.requests.delete(url.format(existing_assets[fname]))
                if r.status_code != 204:
                    self.fail(r, 'Failed to delete %s from GitHub' % fname)
            r = self.do_upload(upload_url, path, desc, fname)
            if r.status_code != 201:
                self.fail(r, 'Failed to upload file: %s' % fname)
            try:
                r = self.requests.patch(
                    url.format(r.json()['id']),
                    data=json.dumps({
                        'name': fname,
                        'label': desc
                    })
                )
            except Exception:
                time.sleep(15)
                r = self.requests.patch(
                    url.format(r.json()['id']),
                    data=json.dumps({
                        'name': fname,
                        'label': desc
                    })
                )
            if r.status_code != 200:
                self.fail(r, 'Failed to set label for %s' % fname)

    def clean_older_releases(self, releases):
        for release in releases:
            if release.get('assets',
                           None) and release['tag_name'] != self.current_tag_name:
                self.info(
                    '\nDeleting old released installers from: %s' %
                    release['tag_name']
                )
                for asset in release['assets']:
                    r = self.requests.delete(
                        self.API + 'repos/%s/%s/releases/assets/%s' %
                        (self.username, self.reponame, asset['id'])
                    )
                    if r.status_code != 204:
                        self.fail(
                            r, 'Failed to delete obsolete asset: %s for release: %s'
                            % (asset['name'], release['tag_name'])
                        )

    def do_upload(self, url, path, desc, fname):
        mime_type = mimetypes.guess_type(fname)[0] or 'application/octet-stream'
        self.info('Uploading to GitHub: %s (%s)' % (fname, mime_type))
        with ReadFileWithProgressReporting(path) as f:
            return self.requests.post(
                url,
                headers={
                    'Content-Type': mime_type,
                    'Content-Length': str(f._total)
                },
                params={'name': fname},
                data=f
            )

    def fail(self, r, msg):
        print(msg, ' Status Code: %s' % r.status_code, file=sys.stderr)
        print("JSON from response:", file=sys.stderr)
        pprint(dict(r.json()), stream=sys.stderr)
        raise SystemExit(1)

    def already_exists(self, r):
        error_code = r.json().get('errors', [{}])[0].get('code', None)
        return error_code == 'already_exists'

    def existing_assets(self, release_id):
        url = self.API + 'repos/%s/%s/releases/%s/assets' % (
            self.username, self.reponame, release_id
        )
        r = self.requests.get(url)
        if r.status_code != 200:
            self.fail('Failed to get assets for release')
        return {asset['name']: asset['id'] for asset in r.json()}

    def releases(self):
        url = self.API + 'repos/%s/%s/releases' % (self.username, self.reponame)
        r = self.requests.get(url)
        if r.status_code != 200:
            self.fail(r, 'Failed to list releases')
        return r.json()

    def create_release(self, releases):
        ' Create a release on GitHub or if it already exists, return the existing release '
        for release in releases:
            # Check for existing release
            if release['tag_name'] == self.current_tag_name:
                return release
        url = self.API + 'repos/%s/%s/releases' % (self.username, self.reponame)
        r = self.requests.post(
            url,
            data=json.dumps({
                'tag_name': self.current_tag_name,
                'target_commitish': 'master',
                'name': 'version %s' % self.version,
                'body': 'Release version %s' % self.version,
                'draft': False,
                'prerelease': False
            })
        )
        if r.status_code != 201:
            self.fail(r, 'Failed to create release for version: %s' % self.version)
        return r.json()


# }}}


def generate_index():  # {{{
    os.chdir('/srv/download')
    releases = set()
    for x in os.listdir('.'):
        if os.path.isdir(x) and '.' in x:
            releases.add(tuple((int(y) for y in x.split('.'))))
    rmap = OrderedDict()
    for rnum in sorted(releases, reverse=True):
        series = rnum[:2] if rnum[0] == 0 else rnum[:1]
        if series not in rmap:
            rmap[series] = []
        rmap[series].append(rnum)

    template = '''<!DOCTYPE html>\n<html lang="en"> <head> <meta charset="utf-8"> <title>{title}</title><link rel="icon" type="image/png" href="//calibre-ebook.com/favicon.png" /> <style type="text/css"> {style} </style> </head> <body> <h1>{title}</h1> <p>{msg}</p> {body} </body> </html> '''  # noqa
    style = '''
    body { font-family: sans-serif; background-color: #eee; }
    a { text-decoration: none; }
    a:visited { color: blue }
    a:hover { color: red }
    ul { list-style-type: none }
    li { padding-bottom: 1ex }
    dd li { text-indent: 0; margin: 0 }
    dd ul { padding: 0; margin: 0 }
    dt { font-weight: bold }
    dd { margin-bottom: 2ex }
    '''
    body = []
    for series in rmap:
        body.append(
            '<li><a href="{0}.html" title="Releases in the {0}.x series">{0}.x</a>\xa0\xa0\xa0<span style="font-size:smaller">[{1} releases]</span></li>'
            .format(  # noqa
                '.'.join(map(type(''), series)), len(rmap[series])
            )
        )
    body = '<ul>{0}</ul>'.format(' '.join(body))
    index = template.format(
        title='Previous calibre releases',
        style=style,
        msg='Choose a series of calibre releases',
        body=body
    )
    with open('index.html', 'wb') as f:
        f.write(index.encode('utf-8'))

    for series, releases in rmap.items():
        sname = '.'.join(map(type(''), series))
        body = [
            '<li><a href="{0}/" title="Release {0}">{0}</a></li>'.format(
                '.'.join(map(type(''), r))
            ) for r in releases
        ]
        body = '<ul class="release-list">{0}</ul>'.format(' '.join(body))
        index = template.format(
            title='Previous calibre releases (%s.x)' % sname,
            style=style,
            msg='Choose a calibre release',
            body=body
        )
        with open('%s.html' % sname, 'wb') as f:
            f.write(index.encode('utf-8'))

        for r in releases:
            rname = '.'.join(map(type(''), r))
            os.chdir(rname)
            try:
                body = []
                files = os.listdir('.')
                windows = [x for x in files if x.endswith('.msi')]
                if windows:
                    windows = [
                        '<li><a href="{0}" title="{1}">{1}</a></li>'.format(
                            x, 'Windows 64-bit Installer'
                            if '64bit' in x else 'Windows 32-bit Installer'
                        ) for x in windows
                    ]
                    body.append(
                        '<dt>Windows</dt><dd><ul>{0}</ul></dd>'.format(
                            ' '.join(windows)
                        )
                    )
                portable = [x for x in files if '-portable-' in x]
                if portable:
                    body.append(
                        '<dt>Calibre Portable</dt><dd><a href="{0}" title="{1}">{1}</a></dd>'
                        .format(portable[0], 'Calibre Portable Installer')
                    )
                osx = [x for x in files if x.endswith('.dmg')]
                if osx:
                    body.append(
                        '<dt>Apple Mac</dt><dd><a href="{0}" title="{1}">{1}</a></dd>'
                        .format(osx[0], 'OS X Disk Image (.dmg)')
                    )
                linux = [
                    x for x in files if x.endswith('.txz') or x.endswith('tar.bz2')
                ]
                if linux:
                    linux = [
                        '<li><a href="{0}" title="{1}">{1}</a></li>'.format(
                            x, 'Linux 64-bit binary'
                            if 'x86_64' in x else 'Linux 32-bit binary'
                        ) for x in linux
                    ]
                    body.append(
                        '<dt>Linux</dt><dd><ul>{0}</ul></dd>'.format(
                            ' '.join(linux)
                        )
                    )
                source = [x for x in files if x.endswith('.xz') or x.endswith('.gz')]
                if source:
                    body.append(
                        '<dt>Source Code</dt><dd><a href="{0}" title="{1}">{1}</a></dd>'
                        .format(source[0], 'Source code (all platforms)')
                    )

                body = '<dl>{0}</dl>'.format(''.join(body))
                index = template.format(
                    title='calibre release (%s)' % rname,
                    style=style,
                    msg='',
                    body=body
                )
                with open('index.html', 'wb') as f:
                    f.write(index.encode('utf-8'))
            finally:
                os.chdir('..')


# }}}

SERVER_BASE = '/srv/download/'


def upload_to_servers(files, version):  # {{{
    base = SERVER_BASE
    dest = os.path.join(base, version)
    if not os.path.exists(dest):
        os.mkdir(dest)
    for src in files:
        shutil.copyfile(src, os.path.join(dest, os.path.basename(src)))
    cwd = os.getcwd()
    try:
        generate_index()
    finally:
        os.chdir(cwd)

    # for server, rdir in {'files':'/srv/download/'}.items():
    #     print('Uploading to server:', server)
    #     server = '%s.calibre-ebook.com' % server
    #     # Copy the generated index files
    #     print ('Copying generated index')
    #     check_call(['rsync', '-hza', '-e', 'ssh -x', '--include', '*.html',
    #                 '--filter', '-! */', base, 'root@%s:%s' % (server, rdir)])
    #     # Copy the release files
    #     rdir = '%s%s/' % (rdir, version)
    #     for x in files:
    #         start = time.time()
    #         print ('Uploading', x)
    #         for i in range(5):
    #             try:
    #                 check_call(['rsync', '-h', '-z', '--progress', '-e', 'ssh -x', x,
    #                 'root@%s:%s'%(server, rdir)])
    #             except KeyboardInterrupt:
    #                 raise SystemExit(1)
    #             except:
    #                 print ('\nUpload failed, trying again in 30 seconds')
    #                 time.sleep(30)
    #             else:
    #                 break
    #         print ('Uploaded in', int(time.time() - start), 'seconds\n\n')
    #


# }}}


# CLI {{{
def cli_parser():
    epilog = 'Copyright Kovid Goyal 2012'

    p = ArgumentParser(
        description='Upload project files to a hosting service automatically',
        epilog=epilog
    )
    a = p.add_argument
    a(
        'appname',
        help='The name of the application, all files to'
        ' upload should begin with this name'
    )
    a(
        'version',
        help='The version of the application, all files to'
        ' upload should contain this version'
    )
    a(
        'file_map',
        type=FileType('rb'),
        help='A file containing a mapping of files to be uploaded to '
        'descriptions of the files. The descriptions will be visible '
        'to users trying to get the file from the hosting service. '
        'The format of the file is filename: description, with one per '
        'line. filename can be a path to the file relative to the current '
        'directory.'
    )
    a(
        '--replace',
        action='store_true',
        default=False,
        help='If specified, existing files are replaced, otherwise '
        'they are skipped.'
    )

    subparsers = p.add_subparsers(
        help='Where to upload to',
        dest='service',
        title='Service',
        description='Hosting service to upload to'
    )
    sf = subparsers.add_parser(
        'sourceforge', help='Upload to sourceforge', epilog=epilog
    )
    gh = subparsers.add_parser('github', help='Upload to GitHub', epilog=epilog)
    subparsers.add_parser('calibre', help='Upload to calibre file servers')

    a = sf.add_argument
    a('project', help='The name of the project on sourceforge we are uploading to')
    a('username', help='Sourceforge username')

    a = gh.add_argument
    a('project', help='The name of the repository on GitHub we are uploading to')
    a('username', help='Username to log into your GitHub account')
    a('password', help='Password to log into your GitHub account')

    return p


def main(args=None):
    cli = cli_parser()
    args = cli.parse_args(args)
    files = {}
    with args.file_map as f:
        for line in f:
            fname, _, desc = line.partition(':')
            fname, desc = fname.strip(), desc.strip()
            if fname and desc:
                files[fname] = desc

    ofiles = OrderedDict()
    for x in sorted(files, key=lambda x: os.stat(x).st_size, reverse=True):
        ofiles[x] = files[x]

    if args.service == 'sourceforge':
        sf = SourceForge(
            ofiles, args.project, args.version, args.username, replace=args.replace
        )
        sf()
    elif args.service == 'github':
        gh = GitHub(
            ofiles,
            args.project,
            args.version,
            args.username,
            args.password,
            replace=args.replace
        )
        gh()
    elif args.service == 'calibre':
        upload_to_servers(ofiles, args.version)


if __name__ == '__main__':
    main()
# }}}
