#!/usr/bin/env python3

############################################################################
#
# MODULE:       Builds manual pages
# AUTHOR(S):    Markus Neteler
#               Glynn Clements
#               Martin Landa <landa.martin gmail.com>
# PURPOSE:      Create HTML manual page snippets
# COPYRIGHT:    (C) 2007-2024 by Glynn Clements
#                and the GRASS Development Team
#
#               This program is free software under the GNU General
#               Public License (>=v2). Read the file COPYING that
#               comes with GRASS for details.
#
#############################################################################

import http
import sys
import os
import string
import re
from datetime import datetime
import locale
import json
import pathlib
import subprocess

from html.parser import HTMLParser

from urllib import request as urlrequest
from urllib.error import HTTPError, URLError
import urllib.parse as urlparse

try:
    import grass.script as gs
except ImportError:
    # During compilation GRASS GIS
    gs = None

from generate_last_commit_file import COMMIT_DATE_FORMAT

HEADERS = {
    "User-Agent": "Mozilla/5.0",
}
HTTP_STATUS_CODES = list(http.HTTPStatus)


def get_version_branch(major_version, addons_git_repo_url):
    """Check if version branch for the current GRASS version exists,
    if not, take branch for the previous version
    For the official repo we assume that at least one version branch is present

    :param major_version int: GRASS GIS major version
    :param addons_git_repo_url str: Addons Git ropository URL

    :return version_branch str: version branch
    """
    version_branch = f"grass{major_version}"
    if gs:
        branch = gs.Popen(
            [
                "git",
                "ls-remote",
                "--heads",
                addons_git_repo_url,
                f"refs/heads/{version_branch}",
            ],
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
        )
        branch, stderr = branch.communicate()
        if stderr:
            gs.fatal(
                _(
                    "Failed to get branch from the Git repository"
                    " <{repo_path}>.\n{error}"
                ).format(
                    repo_path=addons_git_repo_url,
                    error=gs.decode(stderr),
                )
            )
        if version_branch not in gs.decode(branch):
            version_branch = "grass{}".format(int(major_version) - 1)
    return version_branch


grass_version = os.getenv("VERSION_NUMBER", "unknown")
trunk_url = ""
addons_url = ""
grass_git_branch = "main"
major, minor, patch = None, None, None
if grass_version != "unknown":
    major, minor, patch = grass_version.split(".")
    base_url = "https://github.com/OSGeo/"
    trunk_url = urlparse.urljoin(
        base_url,
        urlparse.urljoin(
            "grass/tree/",
            grass_git_branch + "/",
        ),
    )
    addons_url = urlparse.urljoin(
        base_url,
        urlparse.urljoin(
            "grass-addons/tree/",
            get_version_branch(
                major,
                urlparse.urljoin(base_url, "grass-addons/"),
            ),
        ),
    )


def _get_encoding():
    try:
        # Python >= 3.11
        encoding = locale.getencoding()
    except AttributeError:
        encoding = locale.getdefaultlocale()[1]
    if not encoding:
        encoding = "UTF-8"
    return encoding


def urlopen(url, *args, **kwargs):
    """Wrapper around urlopen. Same function as 'urlopen', but with the
    ability to define headers.
    """
    request = urlrequest.Request(url, headers=HEADERS)
    return urlrequest.urlopen(request, *args, **kwargs)


def set_proxy():
    """Set proxy"""
    proxy = os.getenv("GRASS_PROXY")
    if proxy:
        proxies = {}
        for ptype, purl in (p.split("=") for p in proxy.split(",")):
            proxies[ptype] = purl
        urlrequest.install_opener(
            urlrequest.build_opener(urlrequest.ProxyHandler(proxies))
        )


set_proxy()


def download_git_commit(url, response_format, *args, **kwargs):
    """Download module/addon last commit from GitHub API

    :param str url: url address
    :param str response_format: content type

    :return urllib.request.urlopen or None response: response object or
                                                     None
    """
    try:
        response = urlopen(url, *args, **kwargs)
        if not response.code == 200:
            index = HTTP_STATUS_CODES.index(response.code)
            desc = HTTP_STATUS_CODES[index].description
            gs.fatal(
                _(
                    "Download commit from <{url}>, return status code "
                    "{code}, {desc}".format(
                        url=url,
                        code=response.code,
                        desc=desc,
                    ),
                ),
            )
        if response_format not in response.getheader("Content-Type"):
            gs.fatal(
                _(
                    "Wrong downloaded commit file format. "
                    "Check url <{url}>. Allowed file format is "
                    "{response_format}.".format(
                        url=url,
                        response_format=response_format,
                    ),
                ),
            )
        return response
    except HTTPError as err:
        gs.warning(
            _(
                "The download of the commit from the GitHub API "
                "server wasn't successful, <{}>. Commit and commit "
                "date will not be included in the <{}> addon html manual "
                "page.".format(err.msg, pgm)
            ),
        )
    except URLError:
        gs.warning(
            _(
                "Download file from <{url}>, failed. Check internet "
                "connection. Commit and commit date will not be included "
                "in the <{pgm}> addon manual page.".format(url=url, pgm=pgm)
            ),
        )


def get_default_git_log(src_dir, datetime_format="%A %b %d %H:%M:%S %Y"):
    """Get default Git commit and commit date, when getting commit from
    local Git, local JSON file and remote GitHub REST API server wasn't
    successful.

    :param str src_dir: addon source dir
    :param str datetime_format: output commit datetime format
                                e.g. Sunday Jan 16 23:09:35 2022

    :return dict: dict which store last commit and commnit date
    """
    return {
        "commit": "unknown",
        "date": datetime.fromtimestamp(os.path.getmtime(src_dir)).strftime(
            datetime_format
        ),
    }


def parse_git_commit(
    commit,
    src_dir,
    git_log=None,
):
    """Parse Git commit

    :param str commit: commit message
    :param str src_dir: addon source dir
    :param dict git_log: dict which store last commit and commnit
                         date

    :return dict git_log: dict which store last commit and commnit date
    """
    if not git_log:
        git_log = get_default_git_log(src_dir=src_dir)
    if commit:
        git_log["commit"], commit_date = commit.strip().split(",")
        git_log["date"] = format_git_commit_date_from_local_git(
            commit_datetime=commit_date,
        )
    return git_log


def get_git_commit_from_file(
    src_dir,
    git_log=None,
):
    """Get Git commit from JSON file

    :param str src_dir: addon source dir
    :param dict git_log: dict which store last commit and commnit date

    :return dict git_log: dict which store last commit and commnit date
    """
    # Accessed date time if getting commit from JSON file wasn't successful
    if not git_log:
        git_log = get_default_git_log(src_dir=src_dir)
    json_file_path = os.path.join(
        topdir,
        "core_modules_with_last_commit.json",
    )
    if os.path.exists(json_file_path):
        with open(json_file_path) as f:
            core_modules_with_last_commit = json.load(f)
        if pgm in core_modules_with_last_commit:
            core_module = core_modules_with_last_commit[pgm]
            git_log["commit"] = core_module["commit"]
            git_log["date"] = format_git_commit_date_from_local_git(
                commit_datetime=core_module["date"],
            )
    return git_log


def get_git_commit_from_rest_api_for_addon_repo(
    addon_path,
    src_dir,
    git_log=None,
):
    """Get Git commit from remote GitHub REST API for addon repository

    :param str addon_path: addon path
    :param str src_dir: addon source dir
    :param dict git_log: dict which store last commit and commnit date

    :return dict git_log: dict which store last commit and commnit date
    """
    # Accessed date time if getting commit from GitHub REST API wasn't successful
    if not git_log:
        git_log = get_default_git_log(src_dir=src_dir)
    grass_addons_url = (
        "https://api.github.com/repos/osgeo/grass-addons/commits?"
        "path={path}&page=1&per_page=1&sha=grass{major}".format(
            path=addon_path,
            major=major,
        )
    )  # sha=git_branch_name

    response = download_git_commit(
        url=grass_addons_url,
        response_format="application/json",
    )
    if response:
        commit = json.loads(response.read())
        if commit:
            git_log["commit"] = commit[0]["sha"]
            git_log["date"] = format_git_commit_date_from_rest_api(
                commit_datetime=commit[0]["commit"]["author"]["date"],
            )
    return git_log


def format_git_commit_date_from_rest_api(
    commit_datetime, datetime_format="%A %b %d %H:%M:%S %Y"
):
    """Format datetime from remote GitHub REST API

    :param str commit_datetime: commit datetime
    :param str datetime_format: output commit datetime format
                                e.g. Sunday Jan 16 23:09:35 2022

    :return str: output formatted commit datetime
    """
    return datetime.strptime(
        commit_datetime,
        "%Y-%m-%dT%H:%M:%SZ",  # ISO 8601 YYYY-MM-DDTHH:MM:SSZ
    ).strftime(datetime_format)


def format_git_commit_date_from_local_git(
    commit_datetime, datetime_format="%A %b %d %H:%M:%S %Y"
):
    """Format datetime from local Git or JSON file

    :param str commit_datetime: commit datetime
    :param str datetime_format: output commit datetime format
                                e.g. Sunday Jan 16 23:09:35 2022

    :return str: output formatted commit datetime
    """
    return datetime.fromisoformat(
        commit_datetime,
    ).strftime(datetime_format)


def has_src_code_git(src_dir, is_addon):
    """Has core module or addon source code Git

    :param str src_dir: core module or addon root directory
    :param bool is_addon: True if it is addon

    :return subprocess.CompletedProcess or None: subprocess.CompletedProcess
                                                 if core module or addon
                                                 source code has Git
    """
    actual_dir = os.getcwd()
    if is_addon:
        os.chdir(src_dir)
    else:
        os.chdir(topdir)
    try:
        process_result = subprocess.run(
            [
                "git",
                "log",
                "-1",
                f"--format=%H,{COMMIT_DATE_FORMAT}",
                src_dir,
            ],
            stderr=subprocess.PIPE,
            stdout=subprocess.PIPE,
        )  # --format=%H,COMMIT_DATE_FORMAT commit hash,author date
        os.chdir(actual_dir)
        return process_result if process_result.returncode == 0 else None
    except FileNotFoundError:
        os.chdir(actual_dir)
        return None


def get_last_git_commit(src_dir, addon_path, is_addon):
    """Get last module/addon git commit

    :param str src_dir: module/addon source dir
    :param str addon_path: addon path
    :param bool is_addon: True if it is addon

    :return dict git_log: dict with key commit and date, if not
                          possible download commit from GitHub REST API
                          server values of keys have "unknown" string
    """
    process_result = has_src_code_git(src_dir=src_dir, is_addon=is_addon)
    if process_result:
        return parse_git_commit(
            commit=process_result.stdout.decode(),
            src_dir=src_dir,
        )
    else:
        if gs:
            # Addons installation
            return get_git_commit_from_rest_api_for_addon_repo(
                addon_path=addon_path,
                src_dir=src_dir,
            )
        # During GRASS GIS compilation from source code without Git
        else:
            return get_git_commit_from_file(src_dir=src_dir)


html_page_footer_pages_path = (
    os.getenv("HTML_PAGE_FOOTER_PAGES_PATH")
    if os.getenv("HTML_PAGE_FOOTER_PAGES_PATH")
    else ""
)

pgm = sys.argv[1]

src_file = "%s.html" % pgm
tmp_file = "%s.tmp.html" % pgm

header_base = """<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>${PGM} - GRASS GIS Manual</title>
 <meta name="Author" content="GRASS Development Team">
 <meta name="description" content="${PGM}: ${PGM_DESC}">
 <link rel="stylesheet" href="grassdocs.css" type="text/css">
 <meta http-equiv="content-language" content="en-us">
 <meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body bgcolor="white">
<div id="container">

<a href="index.html"><img src="grass_logo.png" alt="GRASS logo"></a>
"""

header_nopgm = """<h2>${PGM}</h2>
"""

header_pgm = """<h2>NAME</h2>
<em><b>${PGM}</b></em>
"""

header_pgm_desc = """<h2>NAME</h2>
<em><b>${PGM}</b></em> - ${PGM_DESC}
"""

sourcecode = string.Template(
    """
<h2>SOURCE CODE</h2>
<p>
  Available at:
  <a href="${URL_SOURCE}">${PGM} source code</a>
  (<a href="${URL_LOG}">history</a>)
</p>
<p>
  ${DATE_TAG}
</p>
"""
)

footer_index = string.Template(
    """<hr class="header">
<p>
<a href="index.html">Main index</a> |
<a href="${HTML_PAGE_FOOTER_PAGES_PATH}${INDEXNAME}.html">${INDEXNAMECAP} index</a> |
<a href="${HTML_PAGE_FOOTER_PAGES_PATH}topics.html">Topics index</a> |
<a href="${HTML_PAGE_FOOTER_PAGES_PATH}keywords.html">Keywords index</a> |
<a href="${HTML_PAGE_FOOTER_PAGES_PATH}graphical_index.html">Graphical index</a> |
<a href="${HTML_PAGE_FOOTER_PAGES_PATH}full_index.html">Full index</a>
</p>
<p>
&copy; 2003-${YEAR}
<a href="https://grass.osgeo.org">GRASS Development Team</a>,
GRASS GIS ${GRASS_VERSION} Reference Manual
</p>

</div>
</body>
</html>
"""
)

footer_noindex = string.Template(
    """<hr class="header">
<p>
<a href="index.html">Main index</a> |
<a href="${HTML_PAGE_FOOTER_PAGES_PATH}topics.html">Topics index</a> |
<a href="${HTML_PAGE_FOOTER_PAGES_PATH}keywords.html">Keywords index</a> |
<a href="${HTML_PAGE_FOOTER_PAGES_PATH}graphical_index.html">Graphical index</a> |
<a href="${HTML_PAGE_FOOTER_PAGES_PATH}full_index.html">Full index</a>
</p>
<p>
&copy; 2003-${YEAR}
<a href="https://grass.osgeo.org">GRASS Development Team</a>,
GRASS GIS ${GRASS_VERSION} Reference Manual
</p>

</div>
</body>
</html>
"""
)


def read_file(name):
    try:
        with open(name) as f:
            s = f.read()
        return s
    except IOError:
        return ""


def create_toc(src_data):
    class MyHTMLParser(HTMLParser):
        def __init__(self):
            HTMLParser.__init__(self)
            self.reset()
            self.idx = 1
            self.tag_curr = ""
            self.tag_last = ""
            self.process_text = False
            self.data = []
            self.tags_allowed = ("h1", "h2", "h3")
            self.tags_ignored = "img"
            self.text = ""

        def handle_starttag(self, tag, attrs):
            if tag in self.tags_allowed:
                self.process_text = True
            self.tag_last = self.tag_curr
            self.tag_curr = tag

        def handle_endtag(self, tag):
            if tag in self.tags_allowed:
                self.data.append((tag, "%s_%d" % (tag, self.idx), self.text))
                self.idx += 1
                self.process_text = False
                self.text = ""

            self.tag_curr = self.tag_last

        def handle_data(self, data):
            if not self.process_text:
                return
            if self.tag_curr in self.tags_allowed or self.tag_curr in self.tags_ignored:
                self.text += data
            else:
                self.text += "<%s>%s</%s>" % (self.tag_curr, data, self.tag_curr)

    # instantiate the parser and fed it some HTML
    parser = MyHTMLParser()
    parser.feed(src_data)

    return parser.data


def escape_href(label):
    # remove html tags
    label = re.sub("<[^<]+?>", "", label)
    # fix &nbsp;
    label = label.replace("&nbsp;", "")
    # fix "
    label = label.replace('"', "")
    # replace space with underscore + lower
    return label.replace(" ", "-").lower()


def write_toc(data, hamburger_menu_toc=False):
    """Write Table of Contents

    :param tuple data: parsed data from MyHTMLParser class instance
    :param bool hamburger_menu_toc: write hamburger menu TOC for the
                                    mobile, tablet screen
    """

    if not data:
        return

    fd = sys.stdout
    if hamburger_menu_toc:
        fd.write("<script>\n")
        fd.write("// Create hamburger menu TOC HTML elements by the JavaScript\n")
        fd.write("let temp = document.createElement('template');\n")
        fd.write(
            """const toc = '<ul class="toc-mobile-screen" """
            """id="toc-mobile-screen">' + \n"""
        )
    else:
        fd.write('<div class="toc">\n')
        fd.write('<h4 class="toc">Table of contents</h4>\n')
        fd.write('<ul class="toc">\n')
    first = True
    has_h2 = False
    in_h3 = False
    indent = 4
    for tag, href, text in data:
        if tag == "h3" and not in_h3 and has_h2:
            if hamburger_menu_toc:
                fd.write("'<ul>' + \n")
            else:
                fd.write('\n%s<ul class="toc">\n' % (" " * indent))
            indent += 4
            in_h3 = True
        elif not first:
            if hamburger_menu_toc:
                fd.write("'</li>' + \n")
            else:
                fd.write("</li>\n")

        if tag == "h2":
            has_h2 = True
            if in_h3:
                indent -= 4
                if hamburger_menu_toc:
                    fd.write("'</ul></li>' + \n")
                else:
                    fd.write("%s</ul></li>\n" % (" " * indent))
                in_h3 = False

        text = text.replace("\xa0", " ")
        if hamburger_menu_toc:
            fd.write(
                f"""'<li><a class="toc-item" href="#{escape_href(text)}">"""
                f"{text}</a>' + \n"
            )
        else:
            fd.write(
                '%s<li class="toc"><a href="#%s" class="toc">%s</a>'
                % (" " * indent, escape_href(text), text)
            )
        first = False

    if hamburger_menu_toc:
        fd.write(
            """'</li>' +
'<a class="close" href="#">' +
'<img src="./hamburger_menu_close.svg" alt="close">' +
'</a>' +
'</ul>' +
'<a class="hamburger" href="#toc-mobile-screen">' +
'<img src="./hamburger_menu.svg" alt="menu">' +
'</a>';
temp.innerHTML = toc;
const grassLogoLink = document.getElementsByTagName("img")[0];
grassLogoLink.after(temp.content);
</script>
"""
        )
    else:
        fd.write("</li>\n</ul>\n")
        fd.write("</div>\n")


def update_toc(data):
    ret_data = []
    pat = re.compile(r"(<(h[2|3])>)(.+)(</h[2|3]>)")
    idx = 1
    for line in data.splitlines():
        if pat.search(line):
            xline = pat.split(line)
            line = (
                xline[1]
                + '<a name="%s">' % escape_href(xline[3])
                + xline[3]
                + "</a>"
                + xline[4]
            )
            idx += 1
        ret_data.append(line)

    return "\n".join(ret_data)


def get_addon_path():
    """Check if pgm is in the addons list and get addon path

    Make or update list of the official addons source
    code paths g.extension prefix parameter plus /grass-addons directory
    using Git repository

    :return str|None: pgm path if pgm is addon else None
    """
    addons_base_dir = os.getenv("GRASS_ADDON_BASE")
    if addons_base_dir and major:
        grass_addons_dir = pathlib.Path(addons_base_dir) / "grass-addons"
        if gs:
            call = gs.call
            popen = gs.Popen
            fatal = gs.fatal
        else:
            call = subprocess.call
            popen = subprocess.Popen
            fatal = sys.stderr.write
        addons_branch = get_version_branch(
            major_version=major,
            addons_git_repo_url=urlparse.urljoin(base_url, "grass-addons/"),
        )
        if not pathlib.Path(addons_base_dir).exists():
            pathlib.Path(addons_base_dir).mkdir(parents=True, exist_ok=True)
        if not grass_addons_dir.exists():
            call(
                [
                    "git",
                    "clone",
                    "-q",
                    "--no-checkout",
                    f"--branch={addons_branch}",
                    "--filter=blob:none",
                    urlparse.urljoin(base_url, "grass-addons/"),
                ],
                cwd=addons_base_dir,
            )
        addons_file_list = popen(
            ["git", "ls-tree", "--name-only", "-r", addons_branch],
            cwd=grass_addons_dir,
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
        )
        addons_file_list, stderr = addons_file_list.communicate()
        if stderr:
            message = (
                "Failed to get addons files list from the"
                " Git repository <{repo_path}>.\n{error}"
            )
            if gs:
                fatal(
                    _(
                        message,
                    ).format(
                        repo_path=grass_addons_dir,
                        error=gs.decode(stderr),
                    )
                )
            else:
                message += "\n"
                fatal(
                    message.format(
                        repo_path=grass_addons_dir,
                        error=stderr.decode(),
                    )
                )
        addon_paths = re.findall(
            rf".*{pgm}*.",
            gs.decode(addons_file_list) if gs else addons_file_list.decode(),
        )
        for addon_path in addon_paths:
            if pgm == pathlib.Path(addon_path).name:
                return addon_path


# process header
src_data = read_file(src_file)
name = re.search("(<!-- meta page name:)(.*)(-->)", src_data, re.IGNORECASE)
pgm_desc = "GRASS GIS Reference Manual"
if name:
    pgm = name.group(2).strip().split("-", 1)[0].strip()
    name_desc = re.search(
        "(<!-- meta page name description:)(.*)(-->)", src_data, re.IGNORECASE
    )
    if name_desc:
        pgm_desc = name_desc.group(2).strip()
desc = re.search("(<!-- meta page description:)(.*)(-->)", src_data, re.IGNORECASE)
if desc:
    pgm = desc.group(2).strip()
    header_tmpl = string.Template(header_base + header_nopgm)
else:
    if not pgm_desc:
        header_tmpl = string.Template(header_base + header_pgm)
    else:
        header_tmpl = string.Template(header_base + header_pgm_desc)

if not re.search("<html>", src_data, re.IGNORECASE):
    tmp_data = read_file(tmp_file)
    """
    Adjusting keywords html pages paths if add-on html man page
    stored on the server
    """
    if html_page_footer_pages_path:
        new_keywords_paths = []
        orig_keywords_paths = re.search(
            r"<h[1-9]>KEYWORDS</h[1-9]>(.*?)<h[1-9]>",
            tmp_data,
            re.DOTALL,
        )
        if orig_keywords_paths:
            search_txt = 'href="'
            for i in orig_keywords_paths.group(1).split(","):
                if search_txt in i:
                    index = i.index(search_txt) + len(search_txt)
                    new_keywords_paths.append(
                        i[:index] + html_page_footer_pages_path + i[index:],
                    )
        if new_keywords_paths:
            tmp_data = tmp_data.replace(
                orig_keywords_paths.group(1),
                ",".join(new_keywords_paths),
            )
    if not re.search("<html>", tmp_data, re.IGNORECASE):
        sys.stdout.write(header_tmpl.substitute(PGM=pgm, PGM_DESC=pgm_desc))

    if tmp_data:
        header_logo_img_el = '<img src="grass_logo.png" alt="GRASS logo">'
        for line in tmp_data.splitlines(True):
            # The cleanup happens on Makefile level too.
            if not re.search(
                "</body>|</html>|</div> <!-- end container -->", line, re.IGNORECASE
            ):
                if header_logo_img_el in line:
                    sys.stdout.write(line)
                    # create hamburger menu TOC
                    write_toc(create_toc(src_data), hamburger_menu_toc=True)
                else:
                    sys.stdout.write(line)

# create TOC
write_toc(create_toc(src_data))

# process body
sys.stdout.write(update_toc(src_data))

# if </html> is found, suppose a complete html is provided.
# otherwise, generate module class reference:
if re.search("</html>", src_data, re.IGNORECASE):
    sys.exit()

index_names = {
    "d": "display",
    "db": "database",
    "g": "general",
    "i": "imagery",
    "m": "miscellaneous",
    "ps": "postscript",
    "p": "paint",
    "r": "raster",
    "r3": "raster3d",
    "s": "sites",
    "t": "temporal",
    "v": "vector",
}


def to_title(name):
    """Convert name of command class/family to form suitable for title"""
    if name == "raster3d":
        return "3D raster"
    elif name == "postscript":
        return "PostScript"
    else:
        return name.capitalize()


index_titles = {}
for key, name in index_names.items():
    index_titles[key] = to_title(name)

# process footer
index = re.search("(<!-- meta page index:)(.*)(-->)", src_data, re.IGNORECASE)
if index:
    index_name = index.group(2).strip()
    if "|" in index_name:
        index_name, index_name_cap = index_name.split("|", 1)
    else:
        index_name_cap = to_title(index_name)
else:
    mod_class = pgm.split(".", 1)[0]
    index_name = index_names.get(mod_class, "")
    index_name_cap = index_titles.get(mod_class, "")

year = os.getenv("VERSION_DATE")
if not year:
    year = str(datetime.now().year)

# check the names of scripts to assign the right folder
topdir = os.path.abspath(os.getenv("MODULE_TOPDIR"))
curdir = os.path.abspath(os.path.curdir)
if curdir.startswith(topdir + os.path.sep):
    source_url = trunk_url
    pgmdir = curdir.replace(topdir, "").lstrip(os.path.sep)
else:
    # addons
    source_url = addons_url
    pgmdir = os.path.sep.join(curdir.split(os.path.sep)[-3:])
url_source = ""
addon_path = None
if os.getenv("SOURCE_URL", ""):
    addon_path = get_addon_path()
    if addon_path:
        # Addon is installed from the local dir
        if os.path.exists(os.getenv("SOURCE_URL")):
            url_source = urlparse.urljoin(
                addons_url,
                addon_path,
            )
        else:
            url_source = urlparse.urljoin(
                os.environ["SOURCE_URL"].split("src")[0],
                addon_path,
            )
else:
    url_source = urlparse.urljoin(source_url, pgmdir)
if sys.platform == "win32":
    url_source = url_source.replace(os.path.sep, "/")

# Process Source code section
branches = "branches"
tree = "tree"
commits = "commits"

if branches in url_source:
    url_log = url_source.replace(branches, commits)
    url_source = url_source.replace(branches, tree)
else:
    url_log = url_source.replace(tree, commits)

git_commit = get_last_git_commit(
    src_dir=curdir,
    addon_path=addon_path if addon_path else None,
    is_addon=True if addon_path else False,
)
if git_commit["commit"] == "unknown":
    date_tag = "Accessed: {date}".format(date=git_commit["date"])
else:
    date_tag = "Latest change: {date} in commit: {commit}".format(
        date=git_commit["date"], commit=git_commit["commit"]
    )
sys.stdout.write(
    sourcecode.substitute(
        URL_SOURCE=url_source,
        PGM=pgm,
        URL_LOG=url_log,
        DATE_TAG=date_tag,
    )
)

# Process footer
if index_name:
    sys.stdout.write(
        footer_index.substitute(
            INDEXNAME=index_name,
            INDEXNAMECAP=index_name_cap,
            YEAR=year,
            GRASS_VERSION=grass_version,
            HTML_PAGE_FOOTER_PAGES_PATH=html_page_footer_pages_path,
        ),
    )
else:
    sys.stdout.write(
        footer_noindex.substitute(
            YEAR=year,
            GRASS_VERSION=grass_version,
            HTML_PAGE_FOOTER_PAGES_PATH=html_page_footer_pages_path,
        ),
    )
