#!/usr/bin/env python
# -*- coding: utf-8 -*- #

import os
import string
import argparse

from pelican import __version__

_TEMPLATES_DIR = os.path.join(os.path.dirname(os.path.abspath(__file__)), \
                              "templates")


CONF = {
    'pelican' : 'pelican',
    'pelicanopts' : '',
    'basedir': '.',
    'ftp_host': 'localhost',
    'ftp_user': 'anonymous',
    'ftp_target_dir': '/',
    'ssh_host': 'locahost',
    'ssh_user': 'root',
    'ssh_target_dir': '/var/www',
    'dropbox_dir' : '~/Dropbox/Public/',
    'default_pagination' : 10,
    'lang': 'en'
}


def get_template(name):
    template = os.path.join(_TEMPLATES_DIR, "{0}.in".format(name))

    if not os.path.isfile(template):
        raise RuntimeError("Cannot open {0}".format(template))

    with open(template, 'r') as fd:
        line = fd.readline()
        while line:
            yield line
            line = fd.readline()
        fd.close()


def ask(question, answer=str, default=None, l=None):
    if answer == str:
        r = ''
        while True:
            if default:
                r = raw_input('> {0} [{1}] '.format(question, default))
            else:
                r = raw_input('> {0} '.format(question, default))

            r = r.strip()

            if len(r) <= 0:
                if default:
                    r = default
                    break
                else:
                    print('You must enter something')
            else:
                if l and len(r) != l:
                    print('You must enter a {0} letters long string'.format(l))
                else:
                   break

        return r

    elif answer == bool:
        r = None
        while True:
            if default is True:
                r = raw_input('> {0} (Y/n) '.format(question))
            elif default is False:
                r = raw_input('> {0} (y/N) '.format(question))
            else:
                r = raw_input('> {0} (y/n) '.format(question))

            r = r.strip().lower()

            if r in ('y', 'yes'):
                r = True
                break
            elif r in ('n', 'no'):
                r = False
                break
            elif not r:
                r = default
                break
            else:
                print("You must answer `yes' or `no'")
        return r
    elif answer == int:
        r = None
        while True:
            if default:
                r = raw_input('> {0} [{1}] '.format(question, default))
            else:
                r = raw_input('> {0} '.format(question))

            r = r.strip()

            if not r:
                r = default
                break

            try:
                r = int(r)
                break
            except:
                print('You must enter an integer')
        return r
    else:
        raise NotImplemented('Arguent `answer` must be str, bool or integer')


def main():
    parser = argparse.ArgumentParser(
        description="A kickstarter for pelican",
        formatter_class=argparse.ArgumentDefaultsHelpFormatter)
    parser.add_argument('-p', '--path', default=".",
            help="The path to generate the blog into")
    parser.add_argument('-t', '--title', metavar="title",
            help='Set the title of the website')
    parser.add_argument('-a', '--author', metavar="author",
            help='Set the author name of the website')
    parser.add_argument('-l', '--lang', metavar="lang",
            help='Set the default lang of the website')

    args = parser.parse_args()

    print('''Welcome to pelican-quickstart v{v}.

This script will help you create a new Pelican-based website.

Please answer the following questions so this script can generate the files needed by Pelican.

    '''.format(v=__version__))

    CONF['basedir'] = os.path.abspath(ask('Where do you want to create your new Web site ?', answer=str, default=args.path))
    CONF['sitename'] = ask('What will be the title of this Web site ?', answer=str, default=args.title)
    CONF['author'] = ask('Who will be the author of this Web site ?', answer=str, default=args.author)
    CONF['lang'] = ask('What will be the default language of this Web site ?', str, args.lang or CONF['lang'], 2)

    CONF['with_pagination'] = ask('Do you want to enable article pagination ?', bool, bool(CONF['default_pagination']))

    if CONF['with_pagination']:
        CONF['default_pagination'] = ask('So how many articles per page do you want ?', int, CONF['default_pagination'])
    else:
        CONF['default_pagination'] = False

    mkfile = ask('Do you want to generate a Makefile to easily manage your website ?', bool, True)

    if mkfile:
        if ask('Do you want to upload your website using FTP ?', answer=bool, default=False):
            CONF['ftp_host'] = ask('What is the hostname of your FTP server ?', str, CONF['ftp_host'])
            CONF['ftp_user'] = ask('What is your username on this server ?', str, CONF['ftp_user'])
            CONF['ftp_target_dir'] = ask('Where do you want to put your website on this server ?', str, CONF['ftp_target_dir'])

        if ask('Do you want to upload your website using SSH ?', answer=bool, default=False):
            CONF['ssh_host'] = ask('What is the hostname of your SSH server ?', str, CONF['ssh_host'])
            CONF['ssh_user'] = ask('What is your username on this server ?', str, CONF['ssh_user'])
            CONF['ssh_target_dir'] = ask('Where do you want to put your website on this server ?', str, CONF['ssh_target_dir'])

        if ask('Do you want to upload your website using Dropbox ?', answer=bool, default=False):
            CONF['dropbox_dir'] = ask('Where is your Dropbox directory ?', str, CONF['dropbox_dir'])

    try:
        os.makedirs(os.path.join(CONF['basedir'], 'src'))
    except OSError, e:
        print('Error: {0}'.format(e))

    try:
        os.makedirs(os.path.join(CONF['basedir'], 'output'))
    except OSError, e:
        print('Error: {0}'.format(e))

    try:
        with open(os.path.join(CONF['basedir'], 'pelican.conf.py'), 'w') as fd:
            for line in get_template('pelican.conf.py'):
                template = string.Template(line)
                fd.write(template.safe_substitute(CONF))
            fd.close()
    except OSError, e:
        print('Error: {0}'.format(e))

    if mkfile:

        try:
            with open(os.path.join(CONF['basedir'], 'Makefile'), 'w') as fd:
                for line in get_template('Makefile'):
                    template = string.Template(line)
                    fd.write(template.safe_substitute(CONF))
                fd.close()
        except OSError, e:
            print('Error: {0}'.format(e))

    print('Done. Your new project is available at %s' % CONF['basedir'])