#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# generates topics.html and topic_*.html
# (c) 2012 by the GRASS Development Team, Markus Neteler, Luca Delucchi

import os
import sys
import glob
from build_html import *

path = sys.argv[1]
year = os.getenv("VERSION_DATE")

min_num_modules_for_topic = 3

keywords = {}

htmlfiles = glob.glob1(path, "*.html")

for fname in htmlfiles:
    fil = open(os.path.join(path, fname))
    # TODO maybe move to Python re (regex)
    lines = fil.readlines()
    try:
        index_keys = lines.index("<h2>KEYWORDS</h2>\n") + 1
        index_desc = lines.index("<h2>NAME</h2>\n") + 1
    except:
        continue
    try:
        key = lines[index_keys].split(",")[1].strip().replace(" ", "_")
        key = key.split(">")[1].split("<")[0]
    except:
        continue
    try:
        desc = lines[index_desc].split("-", 1)[1].strip()
    except:
        desc.strip()
    if key not in keywords.keys():
        keywords[key] = {}
        keywords[key][fname] = desc
    elif fname not in keywords[key]:
        keywords[key][fname] = desc

topicsfile = open(os.path.join(path, "topics.html"), "w")
topicsfile.write(
    header1_tmpl.substitute(
        title="GRASS GIS " "%s Reference Manual: Topics index" % grass_version
    )
)
topicsfile.write(headertopics_tmpl)

for key, values in sorted(keywords.items(), key=lambda s: s[0].lower()):
    keyfile = open(os.path.join(path, "topic_%s.html" % key), "w")
    keyfile.write(
        header1_tmpl.substitute(
            title="GRASS GIS "
            "%s Reference Manual: Topic %s" % (grass_version, key.replace("_", " "))
        )
    )
    keyfile.write(headerkey_tmpl.substitute(keyword=key.replace("_", " ")))
    num_modules = 0
    for mod, desc in sorted(values.items()):
        num_modules += 1
        keyfile.write(
            desc1_tmpl.substitute(cmd=mod, desc=desc, basename=mod.replace(".html", ""))
        )
    if num_modules >= min_num_modules_for_topic:
        topicsfile.writelines(
            [moduletopics_tmpl.substitute(key=key, name=key.replace("_", " "))]
        )
    keyfile.write("</table>\n")
    # link to the keywords index
    # TODO: the labels in keywords index are with spaces and capitals
    # this should be probably changed to lowercase with underscores
    keyfile.write(
        "<p><em>See also the corresponding keyword"
        ' <a href="keywords.html#{key}">{key}</a>'
        " for additional references.</em>".format(key=key.replace("_", " "))
    )
    write_html_footer(keyfile, "index.html", year)
topicsfile.write("</ul>\n")
write_html_footer(topicsfile, "index.html", year)
topicsfile.close()