import re
import os
import sys
from pathlib import Path

from pygments.lexers import JsonLexer, XmlLexer
from sphinx.util import logging
import sphinx

_logger = logging.getLogger(__name__)


#=== General configuration ===#

# General information about the project.
project = 'Odoo'
copyright = 'Odoo S.A.'

# `version` if the version info for the project being documented, acts as replacement for |version|,
# also used in various other places throughout the built documents.
# `release` is the full version, including alpha/beta/rc tags. Acts as replacement for |release|.
version = release = '13.0'

# The minimal Sphinx version required to build the documentation.
needs_sphinx = '3.0.0'

# The default language in which the documentation is written. It is set to `None` because Sphinx
# considers that no language means 'en'.
language = None

# The suffix of source filenames.
source_suffix = '.rst'

# The master toctree document.
master_doc = 'index'

# List of patterns, relative to source directory, that match files and directories to ignore when
# looking for source files.
exclude_patterns = [
    'locale',
    'README.*',
    'bin', 'include', 'lib',
    'odoo',
]

# The RST text role to use when the role is not specified. E.g.: `example`.
# We use 'literal' as default role for markdown compatibility: `foo` behaves like ``foo``.
# See https://docutils.sourceforge.io/docs/ref/rst/roles.html#standard-roles for other roles.
default_role = 'literal'

# If true, '()' will be appended to :func: etc. cross-reference text
add_function_parentheses = True

#=== Extensions configuration ===#

# Add extensions directory to PYTHONPATH
extension_dir = Path('extensions')
sys.path.insert(0, str(extension_dir.absolute()))

# Search for the directory of odoo sources to know whether autodoc should be used on the dev doc
odoo_sources_candidate_dirs = (Path('odoo'), Path('../odoo'))
odoo_sources_dirs = [
    d for d in odoo_sources_candidate_dirs if d.is_dir() and (d / 'odoo-bin').exists()
]
odoo_dir_in_path = False

if not odoo_sources_dirs:
    _logger.warning(
        "Could not find Odoo sources directory in neither of the following folders:\n"
        "%(dir_list)s\n"
        "The 'Developer' documentation will be built but autodoc directives will be skipped.\n"
        "In order to fully build the 'Developer' documentation, clone the repository with "
        "`git clone https://github.com/odoo/odoo` or create a symbolic link.",
        {'dir_list': '\n'.join([f'\t- {d.resolve()}' for d in odoo_sources_candidate_dirs])},
    )
else:
    odoo_dir = odoo_sources_dirs[0].resolve()
    sys.path.insert(0, str(odoo_dir))
    from odoo import release as odoo_release  # Don't collide with Sphinx's 'release' config option
    odoo_version = odoo_release.version if 'alpha' not in odoo_release.version else 'master'
    if release != odoo_version:
        _logger.warning(
            "Found Odoo sources in %(directory)s but with version '%(odoo_version)s' incompatible "
            "with documentation version '%(doc_version)s'.\n"
            "The 'Developer' documentation will be built but autodoc directives will be skipped.\n"
            "In order to fully build the 'Developer' documentation, checkout the matching branch"
            " with `cd odoo && git checkout %(doc_version)s`.",
            {'directory': odoo_dir, 'odoo_version': odoo_version, 'doc_version': version},
        )
    else:
        _logger.info(
            "Found Odoo sources in %(directory)s matching documentation version '%(version)s'.",
            {'directory': odoo_dir, 'version': release},
        )
        odoo_dir_in_path = True

# The Sphinx extensions to use, as module names.
# They can be extensions coming with Sphinx (named 'sphinx.ext.*') or custom ones.
extensions = [
    # Parse Python docstrings (autodoc, automodule, autoattribute directives)
    'sphinx.ext.autodoc' if odoo_dir_in_path else 'autodoc_placeholder',

    # Link sources in other projects (used to build the reference doc)
    'sphinx.ext.intersphinx',

    # Support the specialized to-do directives
    'sphinx.ext.todo',

    # Custom Odoo theme
    'odoo_theme',

    # Youtube and Vimeo videos integration (youtube, vimeo directives)
    'embedded_video',

    'custom_admonitions',

    # Redirection generator
    'redirects',

    # Code switcher (switcher and case directives)
    'switcher',

    # Strange html domain logic used in memento pages
    'html_domain',
]
if odoo_dir_in_path:
    # GitHub links generation
    extensions += [
        'sphinx.ext.linkcode',
        'github_link',
    ]

todo_include_todos = False

intersphinx_mapping = {
    'python': ('https://docs.python.org/3/', None),
    'werkzeug': ('https://werkzeug.palletsprojects.com/en/1.0.x/', None),
}

github_user = 'odoo'
github_project = 'documentation'

locale_dirs = ['../locale/']
templates_path = ['../extensions']

# custom docname_to_domain to divide the translations of applications in subdirectories
sphinx.transforms.i18n.docname_to_domain = (
    sphinx.util.i18n.docname_to_domain
) = lambda docname, compact: docname.split('/')[1 if docname.startswith('applications/') else 0]

# The version names that should be shown in the version switcher, if the config option `versions`
# is populated. If a version is passed to `versions` but is not listed here, it will not be shown.
versions_names = {
    'master': "Master",
    'saas-15.2': "Odoo Online",
    'saas-15.1': "Odoo Online",
    '15.0': "Odoo 15",
    '14.0': "Odoo 14",
    '13.0': "Odoo 13",
}

# The language names that should be shown in the language switcher, if the config option `languages`
# is populated. If a language is passed to `languages` but is not listed here, it will not be shown.
languages_names = {
    'de': 'Deutsch',
    'en': 'English',
    'es': 'Español',
    'fr': 'Français',
    'nl': 'Nederlands',
    'pt_BR': 'Português (BR)',
    'uk': 'українська',
    'zh_CN': '简体中文',
}

# The specifications of redirect rules used by the redirects extension.
redirects_file = 'redirects.txt'

#=== Options for HTML output ===#

html_theme = 'odoo_theme'

# The name of the Pygments (syntax highlighting) style to use.
# See extensions/odoo_theme/pygments_override.py
pygments_style = 'odoo'

# The paths that contain custom themes, relative to this directory.
html_theme_path = ['extensions']

# The name of an image file (within the static path) to use as favicon of the docs.
# This file should be a Windows icon file (.ico) being 16x16 or 32x32 pixels large.
html_favicon = os.path.join(html_theme_path[0], html_theme, 'static', 'img', 'favicon.ico')

# The paths that contain custom static files, relative to this directory.
# They are copied after the builtin static files, so a file named "default.css" will overwrite the
# builtin "default.css".
html_static_path = ['static']
html_add_permalinks = '¶'  # Sphinx < 3.5
html_permalinks = True  # Sphinx >= 3.5
# Additional JS & CSS files that can be imported with the 'custom-js' and 'custom-css' metadata.
# Lists are empty because the files are specified in extensions/themes.
html_js_files = []
html_css_files = []

# PHP lexer option to not require <?php
highlight_options = {
  'php': {'startinline': True},
}

#=== Options for LaTeX output ===#

latex_elements = {
    # The paper size ('letterpaper' or 'a4paper').
    'papersize': 'a4paper',

    # Additional stuff for the LaTeX preamble.
    'preamble': r'\usepackage{odoo}',
    'tableofcontents': '',  # no TOC

    # Output manually in latex docs
    'releasename': '14.0',
}

latex_additional_files = ['static/latex/odoo.sty']

# Grouping the document tree into LaTeX files. List of tuples:
# (source start file, target name, title, author, documentclass [howto, manual, or own class]).
latex_documents = [
    ('legal/terms/enterprise_tex', 'odoo_enterprise_agreement.tex',
     'Odoo Enterprise Subscription Agreement', '', 'howto'),
    ('legal/terms/partnership_tex',
     'odoo_partnership_agreement.tex', 'Odoo Partnership Agreement', '', 'howto'),
    ('legal/terms/terms_of_sale',
     'terms_of_sale.tex', 'Odoo Terms of Sale', '', 'howto'),

    ('legal/terms/i18n/enterprise_tex_fr', 'odoo_enterprise_agreement_fr.tex',
     'Odoo Enterprise Subscription Agreement (FR)', '', 'howto'),
    ('legal/terms/i18n/partnership_tex_fr',
     'odoo_partnership_agreement_fr.tex', 'Odoo Partnership Agreement (FR)', '', 'howto'),
    ('legal/terms/i18n/terms_of_sale_fr', 'terms_of_sale_fr.tex',
     u'Conditions Générales de Vente Odoo', '', 'howto'),

    ('legal/terms/i18n/enterprise_tex_nl', 'odoo_enterprise_agreement_nl.tex',
     'Odoo Enterprise Subscription Agreement (NL)', '', 'howto'),

    ('legal/terms/i18n/enterprise_tex_de', 'odoo_enterprise_agreement_de.tex',
     'Odoo Enterprise Subscription Agreement (DE)', '', 'howto'),

    ('legal/terms/i18n/enterprise_tex_es', 'odoo_enterprise_agreement_es.tex',
     'Odoo Enterprise Subscription Agreement (ES)', '', 'howto'),
    ('legal/terms/i18n/partnership_tex_es',
     'odoo_partnership_agreement_es.tex', 'Odoo Partnership Agreement (ES)', '', 'howto'),
]

# The name of an image file (relative to this directory) to place at the top of the title page.
latex_logo = 'static/img/odoo_logo.png'

# If true, show URL addresses after external links.
latex_show_urls = 'True'


def setup(app):
    # Generate all alternate URLs for each document
    app.add_config_value('project_root', None, 'env')
    app.add_config_value('canonical_version', None, 'env')
    app.add_config_value('versions', None, 'env')
    app.add_config_value('languages', None, 'env')
    app.add_config_value('is_remote_build', None, 'env')  # Whether the build is remotely deployed

    app.add_lexer('json', JsonLexer)
    app.add_lexer('xml', XmlLexer)

    app.connect('html-page-context', _generate_alternate_urls)


def _generate_alternate_urls(app, pagename, templatename, context, doctree):
    """ Add keys of required alternate URLs for the current document in the rendering context.

    Alternate URLS are required for:
      - The canonical link tag
      - The version switcher
      - The language switcher and related link tags
    """

    def _canonicalize():
        """ Add the canonical URL for the current document in the rendering context.

        The canonical version is the last released version of the documentation.
        For a given language, the canonical root of a page is in the same language so that web
        searches in that language don't redirect users to the english version of that page.

        E.g.:
        - /documentation/sale.html -> canonical = /documentation/14.0/sale.html
        - /documentation/11.0/fr/website.html -> canonical = /documentation/14.0/fr/website.html
        """
        # If the canonical version is not set, assume that the project has a single version
        _canonical_version = app.config.canonical_version or app.config.version
        _canonical_lang = 'en'  # Always 'en'. Don't take the value of the config option.
        context['canonical'] = _build_url(_version=_canonical_version, _lang=_canonical_lang)

    def _versionize():
        """ Add the pairs of (version, url) for the current document in the rendering context.

        The entry 'version' is added by Sphinx in the rendering context.
        """
        context['version_display_name'] = versions_names[version]

        # If the list of versions is not set, assume the project has no alternate version
        _provided_versions = app.config.versions and app.config.versions.split(',') or []

        # Map alternate versions to their display names and URLs.
        context['alternate_versions'] = []
        for _alternate_version, _display_name in versions_names.items():
            if _alternate_version in _provided_versions and _alternate_version != version:
                context['alternate_versions'].append(
                    (_display_name, _build_url(_alternate_version))
                )

    def _localize():
        """ Add the pairs of (lang, code, url) for the current document in the rendering context.

        E.g.: ('French', 'fr', 'https://.../fr_BE/...')

        The entry 'language' is added by Sphinx in the rendering context.
        """
        _current_lang = app.config.language or 'en'
        # Replace the context value by its translated description ("Français" instead of "french")
        context['language'] = languages_names.get(_current_lang)

        # If the list of languages is not set, assume that the project has no alternate language
        _provided_languages = app.config.languages and app.config.languages.split(',') or []

        # Map alternate languages to their display names and URLs.
        context['alternate_languages'] = []
        for _alternate_lang, _display_name in languages_names.items():
            if _alternate_lang in _provided_languages and _alternate_lang != _current_lang:
                context['alternate_languages'].append(
                    (
                        _display_name,
                        _alternate_lang.split('_')[0] if _alternate_lang != 'en' else 'x-default',
                        _build_url(_lang=_alternate_lang),
                    )
                )

    def _build_url(_version=None, _lang=None):
        if app.config.is_remote_build:
            # Project root like https://www.odoo.com/documentation
            _root = app.config.project_root
        else:
            # Project root like .../documentation/_build/html/14.0/fr
            _root = re.sub(rf'(/{app.config.version})?(/{app.config.language})?$', '', app.outdir)
        # If the canonical version is not set, assume that the project has a single version
        _canonical_version = app.config.canonical_version or app.config.version
        _version = _version or app.config.version
        _lang = _lang or app.config.language or 'en'
        _canonical_page = f'{pagename}.html'
        if app.config.is_remote_build:
            _canonical_page = _canonical_page.replace('index.html', '')
        return f'{_root}' \
               f'{f"/{_version}" if app.config.versions else ""}' \
               f'{f"/{_lang}" if _lang != "en" else ""}' \
               f'/{_canonical_page}'

    _canonicalize()
    _versionize()
    _localize()