# -*- coding: utf-8 -*-

import os
import shutil
import sys
import datetime

from invoke import task
from invoke.util import cd
from pelican.server import ComplexHTTPRequestHandler, RootedHTTPServer
from pelican.settings import DEFAULT_CONFIG, get_settings_from_file

SETTINGS_FILE_BASE = 'pelicanconf.py'
SETTINGS = {}
SETTINGS.update(DEFAULT_CONFIG)
LOCAL_SETTINGS = get_settings_from_file(SETTINGS_FILE_BASE)
SETTINGS.update(LOCAL_SETTINGS)

CONFIG = {
    'current_path': os.getcwd(),
    'settings_base': SETTINGS_FILE_BASE,
    'settings_publish': 'publishconf.py',

    'year_subfolder': '',

    # Output path. Can be absolute or relative to tasks.py. Default: 'output'
    'deploy_path': SETTINGS['OUTPUT_PATH'],

    'fake_path': '../output/',

    # Remote server configuration
    'ssh_user': 'sshcontent',
    'ssh_host': 'Embrevade',
    'ssh_port': '22',
    'ssh_path': '/home/sshcontent/opytex.org/www/',

    # Rsync config
    'rsync_exclude': '--exclude "pymath" --exclude "opytex" --exclude "enseignements"',

    # Port for `serve`
    'port': 8000,
}

@task
def clean(c):
    """Remove generated files"""
    if os.path.isdir(CONFIG['deploy_path']):
        shutil.rmtree(CONFIG['deploy_path'])
        os.makedirs(CONFIG['deploy_path'])

@task
def build(c):
    """Build local version of site"""
    c.run('lessc {current_path}/theme/static/stylesheet/style.less {current_path}/theme/static/stylesheet/style.min.css -x'.format(**CONFIG))
    c.run('pelican -s {settings_base}'.format(**CONFIG))

@task
def rebuild(c):
    """`build` with the delete switch"""
    c.run('pelican -d -s {settings_base}'.format(**CONFIG))

@task
def regenerate(c):
    """Automatically regenerate site upon file modification"""
    c.run('pelican -r -s {settings_base}'.format(**CONFIG))

@task
def serve(c):
    """Serve site at http://localhost:$PORT/ (default port is 8000)"""

    class AddressReuseTCPServer(RootedHTTPServer):
        allow_reuse_address = True

    server = AddressReuseTCPServer(
        CONFIG['deploy_path'],
        ('', CONFIG['port']),
        ComplexHTTPRequestHandler)

    sys.stderr.write('Serving on port {port} ...\n'.format(**CONFIG))
    server.serve_forever()

@task
def reserve(c):
    """`build`, then `serve`"""
    build(c)
    serve(c)

@task
def preview(c):
    """Build production version of site"""
    c.run('pelican -s {settings_publish}'.format(**CONFIG))

@task
def livereload(c):
    """Automatically reload browser tab upon file modification."""
    from livereload import Server
    build(c)
    server = Server()
    # Watch the base settings file
    server.watch(CONFIG['settings_base'], lambda: build(c))
    # Watch content source files
    content_file_extensions = ['.md', '.rst']
    for extension in content_file_extensions:
        content_blob = '{0}/**/*{1}'.format(SETTINGS['PATH'], extension)
        server.watch(content_blob, lambda: build(c))
    # Watch the theme's templates and static assets
    theme_path = SETTINGS['THEME']
    server.watch('{}/templates/*.html'.format(theme_path), lambda: build(c))
    static_file_extensions = ['.css', '.js']
    for extension in static_file_extensions:
        static_file = '{0}/static/**/*{1}'.format(theme_path, extension)
        server.watch(static_file, lambda: build(c))
    # Serve output path on configured port
    server.serve(port=CONFIG['port'], root=CONFIG['deploy_path'])


@task
def publish(c):
    """Publish to production via rsync"""
    c.run('pelican -s {settings_publish}'.format(**CONFIG))
    c.run(
        'rsync --delete {rsync_exclude} -pthrvz -c '
        '-e "ssh " '
        '{} {ssh_host}:{ssh_path}'.format(
            CONFIG['deploy_path'].rstrip('/') + '/',
            **CONFIG))

@task(
        pre=[build]
        )
def fake(c):
    """ Mimic a push to server """
    print('{fake_path}{year_subfolder}'.format(**CONFIG))
    os.makedirs('{fake_path}{year_subfolder}'.format(**CONFIG), exist_ok=True)
    c.run('rsync -P -rvzc --delete {rsync_exclude} {deploy_path}/ {fake_path}{year_subfolder} --cvs-exclude'.format(**CONFIG))