# Configuration file for the Sphinx documentation builder.
#
# This file only contains a selection of the most common options. For a full
# list see the documentation:
# https://www.sphinx-doc.org/en/master/usage/configuration.html

import os
import sys
import sphinx_theme
from recommonmark.transform import AutoStructify
from sphinx.util.osutil import cd


# -- Project information -----------------------------------------------------

project = "Evennia"
copyright = "2020, The Evennia developer community"
author = "The Evennia developer community"

# The full Evennia version covered by these docs, including alpha/beta/rc tags
# This will be used for multi-version selection options.
release = "1.0-dev"


# -- General configuration ---------------------------------------------------

extensions = [
    "recommonmark",
    "sphinx_multiversion",
    "sphinx.ext.napoleon",
    "sphinx.ext.autosectionlabel",
    "sphinx.ext.viewcode",
    # "sphinxcontrib.lunrsearch",
    "sphinx.ext.todo",
    "sphinx.ext.githubpages",
]

source_suffix = [".md", ".rst"]
master_doc = "index"

# make sure sectionlabel references can be used as path/to/file:heading
autosectionlabel_prefix_document = True

# Add any paths that contain templates here, relative to this directory.
templates_path = ["_templates"]
# 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"]


# -- Sphinx-multiversion config ----------------------------------------------

# which branches to include in multi-versioned docs
# - master, develop and vX.X branches
smv_branch_whitelist = r"^master$|^develop$|^v[0-9\.]+?$"
smv_outputdir_format = "{config.release}"
# don't make docs for tags
smv_tag_whitelist = r"^$"


# -- Options for HTML output -------------------------------------------------

html_theme = "nature"

# Custom extras for sidebar
html_sidebars = {
    "**": [
        "searchbox.html",
        "localtoc.html",
        # "globaltoc.html",
        "relations.html",
        "sourcelink.html",
        "versioning.html",
    ]
}
html_favicon = "_static/images/favicon.ico"
html_logo = "_static/images/evennia_logo.png"

# HTML syntax highlighting style
pygments_style = "sphinx"


# -- Options for LaTeX output ------------------------------------------------
# experimental, not working well atm

latex_engine = "xelatex"
latex_show_urls = "footnote"
latex_elements = {
    "papersize": "a4paper",
    "fncychap": r"\usepackage[Bjarne]{fncychap}",
    "fontpkg": r"\usepackage{times,amsmath,amsfonts,amssymb,amsthm}",
    "preamble": r"""
        \usepackage[utf8]{fontenc}
        \usepackage{amsmath,amsfonts,amssymb,amsthm}
        \usepackage[math-style=literal]{unicode-math}
        \usepackage{newunicodechar}
        \usepackage{graphicx}
    """,
}
latex_documents = [
    (master_doc, "main.tex", "Sphinx format", "Evennia", "report"),
    ("toc", "toc.tex", "TOC", "Evennia", "report"),
]


# -- Recommonmark ------------------------------------------------------------
# allows for writing Markdown and convert to rst dynamically

# reroute to github links or to the api

_github_code_root = "https://github.com/evennia/evennia/blob/"
_github_doc_root = "https://github.com/evennia/tree/master/docs/sources/"
_github_issue_choose = "https://github.com/evennia/evennia/issues/new/choose"


def url_resolver(url):
    githubstart = "github:"
    apistart = "api:"
    choose_issue = ("feature-request", "report-bug", "issue", "bug-report")

    if url.lower().strip() in choose_issue:
        return _github_issue_choose

    elif url.startswith(githubstart):
        urlpath = url[len(githubstart) :]
        if not (urlpath.startswith("develop/") or urlpath.startswith("master")):
            urlpath = "master/" + urlpath
        return _github_code_root + urlpath
    elif url.startswith(apistart):
        return "api/" + url[len(apistart) :] + ".html"
    return url
    # else:
    #     return _github_doc_root + url


# auto-create TOCs if a list of links is under these headers
auto_toc_sections = ["Contents", "Toc", "Index"]

recommonmark_config = {
    "enable_auto_toc_tree": True,
    "url_resolver": url_resolver,
    "auto_toc_maxdepth": 1,
    "auto_toc_tree_section": ["Contents", "Toc", "Index"],
    "code_highlight_options": {"force": True, "linenos": True},
}


# -- API/Autodoc ---------------------------------------------------------------
# automatic creation of API documentation. This requires a valid Evennia setup

_no_autodoc = os.environ.get("NOAUTODOC")

if not _no_autodoc:
    # we must set up Evennia and its paths for autodocs to work

    EV_ROOT = os.environ.get("EVDIR")
    GAME_DIR = os.environ.get("EVGAMEDIR")

    if not (EV_ROOT and GAME_DIR):
        err = (
            "The EVDIR and EVGAMEDIR environment variables must be set to "
            "the absolute paths to the evennia/ repo and an initialized "
            "evennia gamedir respectively."
        )
        raise RuntimeError(err)

    print("Evennia root: {}, Game dir: {}".format(EV_ROOT, GAME_DIR))

    sys.path.insert(1, EV_ROOT)
    sys.path.insert(1, GAME_DIR)

    with cd(GAME_DIR):
        # set up Evennia so its sources can be parsed
        os.environ["DJANGO_SETTINGS_MODULE"] = "server.conf.settings"

        import django  # noqa

        django.setup()

        import evennia  # noqa

        evennia._init()


if _no_autodoc:
    exclude_patterns = ["api/*"]
else:
    exclude_patterns = ["api/*migrations.rst"]

autodoc_default_options = {
    "members": True,
    "undoc-members": False,
    "show-inheritance": True,
    "special-members": "__init__",
    "enable_eval_rst": True,
}

autodoc_member_order = "bysource"
autodoc_typehints = "description"

def autodoc_skip_member(app, what, name, obj, skip, options):
    """Which members the autodoc should ignore."""
    if _no_autodoc:
        return True
    if name.startswith("_") and name != "__init__":
        return True
    return False


# clean ANSI colors
from evennia.utils import ansi

def autodoc_clean_docstring(app, what, name, obj, options, lines):
    """Clean docstring of ansi. Must modify lines list in-place"""
    for il, line in enumerate(lines):
        lines[il] = ansi.strip_raw_ansi(line)


# Napoleon Google-style docstring parser for autodocs

napoleon_google_docstring = True
napoleon_numpy_docstring = False
napoleon_include_init_with_doc = False
napoleon_include_private_with_doc = False
napoleon_include_special_with_doc = False
napoleon_use_admonition_for_examples = True
napoleon_use_admonition_for_notes = False
napoleon_use_admonition_for_references = False
napoleon_use_ivar = False
napoleon_use_param = True
napoleon_use_keyword = True
napoleon_use_rtype = False


# -- Main config setup ------------------------------------------
# last setup steps for some plugins


def setup(app):
    app.connect("autodoc-skip-member", autodoc_skip_member)
    app.connect("autodoc-process-docstring", autodoc_clean_docstring)
    app.add_transform(AutoStructify)

    # build toctree file
    sys.path.insert(1, os.path.join(os.path.dirname(os.path.dirname(__file__)), "docs"))
    from docs.pylib import create_toctree

    create_toctree.create_toctree()
    print("Updated source/toc.md file")

    # custom lunr-based search
    # from docs import search
    # custom search
    # search.setup(app)