import sys
from pathlib import Path

from pygments.lexers.web import PhpLexer
from sphinx.highlighting import lexers
from sphinx.util import logging

_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 = '12.0'

# 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 as `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',
]

# 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_dir = Path('odoo')
odoo_dir_in_path = False
if not odoo_dir.is_dir():
    _logger.warning(
        f"Could not find Odoo sources directory at {odoo_dir.absolute()}.\n"
        f"The 'Developer' documentation will be built but autodoc directives will be skipped.\n"
        f"In order to fully build the 'Developer' documentation, clone the repository with "
        f"`git clone https://github.com/odoo/odoo` or create a symbolink link."
    )
else:
    sys.path.insert(0, str(odoo_dir.absolute()))
    from odoo import release as odoo_release  # Don't collide with Sphinx's 'release' config option
    if release != odoo_release.version:
        _logger.warning(
            f"Found Odoo sources directory but with version {odoo_release.version} incompatible "
            f"with documentation version {version}.\n"
            f"The 'Developer' documentation will be built but autodoc directives will be skipped.\n"
            f"In order to fully build the 'Developer' documentation, checkout the matching branch"
            f" with `cd odoo && git checkout {version}`."
        )
    else:
        _logger.info(f"Found Odoo sources directory matching documentation 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',

    # GitHub links generation
    'sphinx.ext.linkcode',
    'github_link',

    # Custom Odoo theme
    'odoo_theme',

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

    'exercise_admonition',

    # Build code from git patches
    'patchqueue',

    # Redirection generator
    'redirects',

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

    # Strange html domain logic used in memento pages
    'html_domain',
]

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-user'

locale_dirs = ['locale/']
supported_languages = {
    'de': 'German',
    'en': 'English',
    'es': 'Spanish',
    'fr': 'French',
    'hr': 'Croatian',
    'nl': 'Dutch',
    'pt_BR': 'Portuguese (BR)',
    'uk': 'Ukrainian',
    'zh_CN': 'Chinese',
}

# 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.
# pygments_style = 'odoo'

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

# The name for this set of Sphinx documents.  If None, it defaults to
# "<project> v<release> documentation".
#html_title = None  TODO ANVFE remove?

# A shorter title for the navigation bar.  Default is the same as html_title.
#html_short_title = None  TODO ANVFE remove?

# The name of an image file (relative to this directory) to place at the top
# of the sidebar.
#html_logo = None  TODO ANVFE remove?

# 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 = None  TODO ANVFE remove?

# Add any paths that contain custom static files (such as style sheets) here, 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
html_js_files = [
    'js/atom.js',
    'js/accounts.js',
    'js/chart-of-accounts.js',
    'js/entries.js',
    'js/reconciliation.js',
    'js/misc.js',
    'js/inventory.js',
    'js/coa-valuation.js',
    'js/coa-valuation-continental.js',
    'js/coa-valuation-anglo-saxon.js',
]
html_css_files = [
    'css/accounting.css',
    'css/legal.css',
]

# Monkeypatch PHP lexer to not require <?php
lexers['php'] = PhpLexer(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 = [
    ('services/legal/terms/enterprise_tex', 'odoo_enterprise_agreement.tex',
     'Odoo Enterprise Subscription Agreement', '', 'howto'),
    ('services/legal/terms/partnership_tex',
     'odoo_partnership_agreement.tex', 'Odoo Partnership Agreement', '', 'howto'),
    ('services/legal/terms/terms_of_sale',
     'terms_of_sale.tex', 'Odoo Terms of Sale', '', 'howto'),

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

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

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

    ('services/legal/terms/i18n/enterprise_tex_es', 'odoo_enterprise_agreement_es.tex',
     'Odoo Enterprise Subscription Agreement (ES)', '', 'howto'),
    ('services/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.connect('html-page-context', _generate_alternate_urls)

    app.connect('doctree-resolved', tag_toctrees)  # TODO ANVFE review + typo


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.
        """
        # If the list of versions is not set, assume that the project has no alternate version
        _alternate_versions = app.config.versions and app.config.versions.split(',') or []
        context['alternate_versions'] = [
            (_alternate_version, _build_url(_version=_alternate_version))
            for _alternate_version in _alternate_versions if _alternate_version != version
        ]

    def _localize():
        """

        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'] = supported_languages.get(_current_lang)

        # If the list of languages is not set, assume that the project has no alternate language
        _alternate_languages = app.config.languages and app.config.languages.split(',') or []
        context['alternate_languages'] = [
            (
                supported_languages.get(_alternate_lang),
                _alternate_lang.split('_')[0] if _alternate_lang != 'en' else 'x-default',
                _build_url(_lang=_alternate_lang),
            )
            for _alternate_lang in _alternate_languages
            if _alternate_lang in supported_languages and _alternate_lang != _current_lang
        ]

    def _build_url(_version=None, _lang=None):
        _root = app.config.project_root or str(Path(__file__).parent)
        _version = _version or app.config.version
        _lang = _lang or app.config.language or 'en'
        _canonical_page = (pagename + '.html').replace('index.html', '').replace('index/', '')
        return f'{_root}/{_version}{f"/{_lang}" if _lang != "en" else ""}/{_canonical_page}'

    _canonicalize()
    _versionize()
    _localize()


def tag_toctrees(app, doctree, docname):
    """Add a 'is-toc-page' metadata entry to all documents containing only a toctree node"""
    # document
    #   section
    #     title
    #     compound@toctree-wrapper
    #     ....
    if not len(doctree.children) <= 1:
        return
    section = doctree.children[0]
    if len(section.children) < 2:
        return
    compound = section.children[1]
    if 'toctree-wrapper' not in compound['classes']:
        return

    app.env.metadata[docname]['has_only_toc'] = True