#!/usr/bin/env python

# Copyright (C) 2013 Oz Nahum <nahumoz@gmail.com>
#
# Everyone is permitted to copy and distribute verbatim or modified
# copies of this license document, and changing it is allowed as long
# as the name is changed.
#
# TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
#
# 0. You just DO WHATEVER THE FUCK YOU WANT TO. (IT'S SLOPPY CODE ANYWAY)
#
# WARANTIES:
# 0. Are you kidding me?
# 1. Seriously, Are you fucking kidding me?
# 2. If anything goes wrong, sue the "The Empire".


# Note about Summary
# has to be 1 line, no '\n' allowed!
"""
Summary: |
   some summary ...

Your post
"""

"""
Everything the Header can't have ":" or "..." in it, you can't have title
with ":" it makes markdown break!
"""

"""
The content directory can contain only mardown or txt files, no images
allowed!
"""
import os
import re
import datetime
import argparse
import sys
from distutils import dir_util
import shutil
from StringIO import StringIO
import codecs
try:
    import yaml  # in debian python-yaml
    from jinja2 import Environment, FileSystemLoader  # in debian python-jinja2
except ImportError, e:
    print e
    print "On Debian based system you can install the dependencies with: "
    print "apt-get install python-yaml python-jinja2"
    sys.exit(1)

try:
    import markdown2
except ImportError, e:
    print e
    print "try: sudo pip install markdown2"
    sys.exit(1)

CONFIG = {
    'content_root': 'content',  # where the markdown files are
    'output_to': 'oz123.github.com',
    'templates': 'templates',
    'date_format': '%Y-%m-%d',
    'base_url': 'http://oz123.github.com',
    'http_port': 3030,
    'content_encoding': 'utf-8',
    'author': 'Oz Nahum Tiram'
}

# EDIT THIS PARAMETER TO CHANGE ARCHIVE SIZE
# 0 Means that all the entries will be in the archive
# 10 meas that all the entries except the last 10
ARCHIVE_SIZE = 0

GLOBAL_TEMPLATE_CONTEXT = {
    'media_base': '/media/',
    'media_url': '../media/',
    'site_url': 'http://oz123.github.com',
    'last_build': datetime.datetime.now().strftime("%Y-%m-%dT%H:%M:%SZ"),
    'twitter': 'https://twitter.com/#!/OzNTiram',
    'stackoverflow': "http://stackoverflow.com/users/492620/oz123",
    'github': "https://github.com/oz123",
}

KINDS = {
    'writing': {
        'name': 'writing', 'name_plural': 'writings',
    },
    'note': {
        'name': 'note', 'name_plural': 'notes',
    },
    'link': {
        'name': 'link', 'name_plural': 'links',
    },
    'photo': {
        'name': 'photo', 'name_plural': 'photos',
    },
    'page': {
        'name': 'page', 'name_plural': 'pages',
    },

}

jinja_env = Environment(loader=FileSystemLoader(CONFIG['templates']))


class Tag(object):
    def __init__(self, name):
        super(Tag, self).__init__()
        self.name = name
        self.prepare()
        self.permalink = GLOBAL_TEMPLATE_CONTEXT["site_url"]

    def prepare(self):
        _slug = self.name.lower()
        _slug = re.sub(r'[;;,. ]', '-', _slug)
        self.slug = _slug


class Entry(object):
    def __init__(self, path):
        super(Entry, self).__init__()
        path = path.split('content/')[-1]
        self.path = path
        self.prepare()

    def __str__(self):
        return self.path

    def __repr__(self):
        return self.path

    @property
    def name(self):
        return os.path.splitext(os.path.basename(self.path))[0]

    @property
    def abspath(self):
        return os.path.abspath(os.path.join(CONFIG['content_root'], self.path))

    @property
    def destination(self):
        dest = "%s/%s/index.html" % (KINDS[
                                     self.kind]['name_plural'], self.name)
        print dest
        return os.path.join(CONFIG['output_to'], dest)

    @property
    def title(self):
        return self.header['title']

    @property
    def summary_html(self):
        return "%s" % markdown2.markdown(self.header['summary'].strip())

    @property
    def credits_html(self):
        return "%s" % markdown2.markdown(self.header['credits'].strip())

    @property
    def summary_atom(self):
        summarya = markdown2.markdown(self.header['summary'].strip())
        summarya = re.sub("<p>|</p>", "", summarya)
        more = '<a href="%s"> continue reading...</a>' % (self.permalink)
        return summarya+more

    @property
    def published_html(self):
        if self.kind in ['link', 'note', 'photo']:
            return self.header['published'].strftime("%B %d, %Y %I:%M %p")
        return self.header['published'].strftime("%B %d, %Y")

    @property
    def published_atom(self):
        return self.published.strftime("%Y-%m-%dT%H:%M:%SZ")

    @property
    def atom_id(self):
        return "tag:%s,%s:%s" % \
            (
                self.published.strftime("%Y-%m-%d"),
                self.permalink,
                GLOBAL_TEMPLATE_CONTEXT["site_url"]
            )

    @property
    def body_html(self):
        return markdown2.markdown(self.body, extras=['fenced-code-blocks'])

    @property
    def permalink(self):
        return "/%s/%s" % (KINDS[self.kind]['name_plural'], self.name)

    @property
    def tags(self):
        tags = list()
        for t in self.header['tags']:
            tags.append(Tag(t))
        return tags

    def prepare(self):
        file = codecs.open(self.abspath, 'r')
        header = ['---']
        while True:
            line = file.readline()
            line = line.rstrip()
            if not line:
                break
            header.append(line)
        self.header = yaml.load(StringIO('\n'.join(header)))
        for h in self.header.items():
            if h:
                try:
                    setattr(self, h[0], h[1])
                except:
                    pass

        body = list()
        for line in file.readlines():
            body.append(line)
        self.body = ''.join(body)
        file.close()

        if self.kind == 'link':
            from urlparse import urlparse
            self.domain_name = urlparse(self.url).netloc
        elif self.kind == 'photo':
            pass
        elif self.kind == 'note':
            pass
        elif self.kind == 'writing':
            pass

    def render(self):
        if not self.header['public']:
            return False

        try:
            os.makedirs(os.path.dirname(self.destination))
        except:
            pass
        context = GLOBAL_TEMPLATE_CONTEXT.copy()

        context['entry'] = self

        template = jinja_env.get_template("entry.html")

        html = template.render(context)

        destination = codecs.open(
            self.destination, 'w', CONFIG['content_encoding'])
        destination.write(html)
        destination.close()
        return True


class Link(Entry):
    def __init__(self, path):
        super(Link, self).__init__(path)

    @property
    def permalink(self):
        print "self.url", self.url
        raw_input()
        return self.url


def entry_factory():
    pass


def _sort_entries(entries):
    _entries = dict()
    sorted_entries = list()

    for entry in entries:
        _published = entry.header['published'].isoformat()
        _entries[_published] = entry

    sorted_keys = sorted(_entries.keys())
    sorted_keys.reverse()

    for key in sorted_keys:
        sorted_entries.append(_entries[key])
    return sorted_entries


def render_index(entries):
    """
    this function renders the main page located at index.html
    under oz123.github.com
    """
    context = GLOBAL_TEMPLATE_CONTEXT.copy()
    context['entries'] = entries[:10]
    template = jinja_env.get_template('entry_index.html')
    html = template.render(context)
    destination = codecs.open("%s/index.html" % CONFIG[
                              'output_to'], 'w', CONFIG['content_encoding'])
    destination.write(html)
    destination.close()


def render_archive(entries, render_to=None):
    """
    this function creates the archive page
    """
    context = GLOBAL_TEMPLATE_CONTEXT.copy()
    context['entries'] = entries[ARCHIVE_SIZE:]
    template = jinja_env.get_template('archive_index.html')
    html = template.render(context)
    if not render_to:
        render_to = "%s/archive/index.html" % CONFIG['output_to']
        dir_util.mkpath("%s/archive" % CONFIG['output_to'])

    destination = codecs.open("%s/archive/index.html" % CONFIG[
                              'output_to'], 'w', CONFIG['content_encoding'])
    destination.write(html)
    destination.close()


def render_atom_feed(entries, render_to=None):
    context = GLOBAL_TEMPLATE_CONTEXT.copy()
    context['entries'] = entries[:10]
    template = jinja_env.get_template('atom.xml')
    html = template.render(context)
    if not render_to:
        render_to = "%s/atom.xml" % CONFIG['output_to']
    destination = codecs.open(render_to, 'w', CONFIG['content_encoding'])
    destination.write(html)
    destination.close()


def render_tag_pages(tag_tree):
    context = GLOBAL_TEMPLATE_CONTEXT.copy()
    for t in tag_tree.items():
        context['tag'] = t[1]['tag']
        context['entries'] = _sort_entries(t[1]['entries'])
        destination = "%s/tags/%s" % (CONFIG['output_to'], context['tag'].slug)
        try:
            os.makedirs(destination)
        except:
            pass
        template = jinja_env.get_template('tag_index.html')
        html = template.render(context)
        file = codecs.open("%s/index.html" %
                           destination, 'w', CONFIG['content_encoding'])
        file.write(html)
        file.close()
        render_atom_feed(context[
                         'entries'], render_to="%s/atom.xml" % destination)


def build():
    print
    print "Rendering website now..."
    print
    print " entries:"
    entries = list()
    tags = dict()
    for root, dirs, files in os.walk(CONFIG['content_root']):
        for fileName in files:
            try:
                if fileName.endswith('md') or fileName.endswith('markdown'):
                    entry = Entry(os.path.join(root, fileName))
            except Exception, e:
                print "Found some problem in: ", fileName
                print e
                raw_input("Please correct")
                sys.exit()
            if entry.render():
                entries.append(entry)
                for tag in entry.tags:
                    if tag.name not in tags:
                        tags[tag.name] = {
                            'tag': tag,
                            'entries': list(),
                        }
                    tags[tag.name]['entries'].append(entry)
            print "     %s" % entry.path
    print " :done"
    print
    print " tag pages & their atom feeds:"
    render_tag_pages(tags)
    print " :done"
    print
    print " site wide index"
    entries = _sort_entries(entries)
    render_index(entries)
    print "................done"
    print " archive index"
    render_archive(entries)
    print "................done"
    print " site wide atom feeds"
    render_atom_feed(entries)
    print "...........done"
    print
    print "All done "


def preview(PREVIEW_ADDR='127.0.1.1', PREVIEW_PORT=11000):
    """
    launch an HTTP to preview the website
    """
    import SimpleHTTPServer
    import SocketServer
    Handler = SimpleHTTPServer.SimpleHTTPRequestHandler
    httpd = SocketServer.TCPServer(("", CONFIG['http_port']), Handler)
    os.chdir(CONFIG['output_to'])
    print "and ready to test at http://127.0.0.1:%d" % CONFIG['http_port']
    print "Hit Ctrl+C to exit"
    try:
        httpd.serve_forever()
    except KeyboardInterrupt:
        print
        print "Shutting Down... Bye!."
        print
        httpd.server_close()


def publish(GITDIRECTORY=CONFIG['output_to']):
    pass


def new_post(GITDIRECTORY=CONFIG['output_to']):
    """
    This function should create a template for a new post with a title
    read from the user input.
    Most other fields should be defaults.
    """
    title = raw_input("Give the title of the post:")
    # TODO check there is not : in the title
    author = CONFIG['author']
    date = datetime.datetime.strftime(datetime.datetime.now(), '%Y-%m-%d')
    tags = '['+raw_input("Give the tags, separated by ', ':")+']'
    published = 'yes'
    chronological = 'yes'
    kind = 'writing'
    summary = ("summary: |\n   Type your summary here\nDo not change the "
               "indentation"
               "to the left\n...\nStart writing your post here!")

    # make file name
    fname = os.path.join(os.getcwd(), 'content', kind,
                         datetime.datetime.strftime(datetime.datetime.now(),
                                                    '%Y'),
                         date+'-'+title.replace(' ', '-')+'.markdown')

    print fname


def clean(GITDIRECTORY="oz123.github.com"):
    directoriestoclean = ["writings", "notes", "links", "tags", "archive"]
    os.chdir(GITDIRECTORY)
    for directory in directoriestoclean:
        shutil.rmtree(directory)


def dist(SOURCEDIR=os.getcwd()+"/content/",
         DESTDIR="oz123.github.com/writings_raw/content/"):
    """
    sync raw files from SOURCE to DEST
    """
    import subprocess as sp
    sp.call(["rsync", "-avP", SOURCEDIR, DESTDIR], shell=False,
            cwd=os.getcwd())

if __name__ == '__main__':
    parser = argparse.ArgumentParser(
        description='blogit - a tool to blog on github.')
    parser.add_argument('-b', '--build', action="store_true",
                        help='convert the markdown files to HTML')
    parser.add_argument('-p', '--preview', action="store_true",
                        help='Launch HTTP server to preview the website')
    parser.add_argument('-c', '--clean', action="store_true",
                        help='clean output files')
    parser.add_argument('-n', '--new', action="store_true",
                        help='create new post')
    parser.add_argument('-d', '--dist', action="store_true",
                        help='sync raw files from SOURCE to DEST')

    args = parser.parse_args()

    if len(sys.argv) < 2:
        parser.print_help()
        sys.exit()
    if args.clean:
        clean()
    if args.build:
        build()
    if args.dist:
        dist()
    if args.preview:
        preview()
    if args.new:
        new_post()