#!/usr/bin/env python

import os
import re
import socket

def software_list(class_path):
    """List software from given module class"""
    os.chdir(class_path)
    software_list = next(os.walk('.'))[1]
    # In case that there is 'all' module
    if 'all' in software_list:
        software_list.remove('all')
    return software_list


def get_software_versions(software_path):
    """List available versions of software"""
    os.chdir(software_path)
    return next(os.walk('.'))[2]

def get_module_description(module_path):
    """Return software homepage URL and description"""
    url = ""
    url_position = 0
    description = " "
    with open(module_path) as f:
        content = f.read()
    if module_path.endswith('lua'):
        data = re.search(r"whatis\((\[\[|\[==\[)Description: ?([\s\S]+)(\]\]|\]==\])\)\s+whatis\((\[\[|\[==\[)Homepage:\s(\S+)(\]\]|\]==\])\)",
                content, re.DOTALL)
        url_position = 5
    else:
        data = re.search(r"module-whatis\s{(Description: )?(.+)\s-\sHomepage:\s(\S+)}",
                content, re.DOTALL)
        url_position = 3

    try:
        description = data.group(2)
        url = data.group(url_position)
    except AttributeError:
        pass
    return url, description

if __name__ == "__main__":
    HTML_SOURCE_DATA = {}
    subdirs = os.environ['MODULEPATH'].split(':')

    print "# Available Modules"
    for dir in sorted(subdirs):
        available_software = software_list(dir)
        print "\n## %s\n" % os.path.basename(dir).title()
        print "| Module | Description |"
        print "| ------ | ----------- |"
        HTML_SOURCE_DATA[dir] = {}
        for soft in sorted(available_software, key=str.lower):
            software_path = os.path.join(dir, soft)
            if os.getenv('CLUSTER')!="ANSELM":
              software_path = software_path.replace(os.path.basename(dir)+'/', 'all/')
            software_versions = get_software_versions(software_path)
            while ".common" in software_versions: software_versions.remove(".common")
            while ".common-6" in software_versions: software_versions.remove(".common-6")
            while ".version" in software_versions: software_versions.remove(".version")

            if not software_versions:
                continue
            first_module_path = os.path.join(software_path, software_versions[0])
            software_url, software_description = get_module_description(first_module_path)
            HTML_SOURCE_DATA[dir][soft] = {'versions': [],
                                           'url': software_url,
                                           'description': software_description}
            for version in software_versions:
                HTML_SOURCE_DATA[dir][soft]['versions'].append(version)
            if software_url=="":
              print "| %s | %s |" % (soft," ".join(software_description.split()))
            else:
              print "| [%s](%s) | %s |" % (soft,software_url," ".join(software_description.split()))