#!/usr/bin/env python
# (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>
#
# This file is part of the Ansible Documentation
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
from __future__ import print_function

__docformat__ = 'restructuredtext'

import optparse
import os
import sys
import traceback
try:
    from sphinx.application import Sphinx
except ImportError:
    print("#################################")
    print("Dependency missing: Python Sphinx")
    print("#################################")
    sys.exit(1)


class SphinxBuilder(object):
    """
    Creates HTML documentation using Sphinx.
    """

    def __init__(self, verbosity=None, parallel=None):
        """
        Run the DocCommand.
        """
        print("Creating html documentation ...")

        try:
            buildername = 'html'

            outdir = os.path.abspath(os.path.join(os.getcwd(), "htmlout"))
            # Create the output directory if it doesn't exist
            if not os.access(outdir, os.F_OK):
                os.mkdir(outdir)

            doctreedir = os.path.join('./', '.doctrees')

            confdir = os.path.abspath('./')
            srcdir = os.path.abspath('rst')
            freshenv = True

            # Create the builder
            # __init__(self, srcdir, confdir, outdir, doctreedir, buildername, confoverrides=None, status=<open file '<stdout>', mode 'w'>, warning=<open file '<stderr>', mode 'w'>, freshenv=False, warningiserror=False, tags=None, verbosity=0, parallel=0)
            app = Sphinx(srcdir,
                         confdir,
                         outdir,
                         doctreedir,
                         buildername,
                         confoverrides={},
                         status=sys.stdout,
                         warning=sys.stderr,
                         freshenv=freshenv,
                         verbosity=verbosity,
                         parallel=parallel)

            app.builder.build_all()

        except ImportError:
            traceback.print_exc()
        except Exception as ex:
            print("FAIL! exiting ... (%s)" % ex, file=sys.stderr)

    def build_docs(self):
        self.app.builder.build_all()

def build_rst_docs(verbosity=None, parallel=None):
    verbosity = verbosity or 1
    parallel = parallel or 1
    SphinxBuilder(verbosity=verbosity,
                  parallel=parallel)

USAGE = """This script builds the html documentation from rst/asciidoc sources.\n")
Run 'make docs' to build everything.\n
Run 'make viewdocs' to build and then preview in a web browser."""

if __name__ == '__main__':

    parser = optparse.OptionParser(USAGE)
    parser.add_option('-v','--verbose', dest='verbosity', default=0, action="count",
                      help="verbose mode (-vvv for more, -vvvv to enable connection debugging)")
    parser.add_option('-j', '--parallel', dest='parallel', default="1", action='store',
                      help="Number of threads to start")
    parser.add_option('--view', dest='view',
                      help="Open a browser after building docs")

    options, args = parser.parse_args(sys.argv[:])

    build_rst_docs(verbosity=options.verbosity, parallel=int(options.parallel))

    if hasattr(options, 'view'):
        import webbrowser
        if not webbrowser.open('htmlout/index.html'):
            print("Could not open on your webbrowser.", file=sys.stderr)