#!/usr/bin/env python3

import sys
import datetime
import os

gemlog_header = '''
# Alternativebit Gemlog

```
                           ...............
                          ,XXXXXXXXXXXXXXX,
                          ,XXXXXXXXXXXXXXX,
                          ,XXXXXXXXXXXXXXX,
                          ,XXXXXXXXXXXXXXX,
                          ,XXXXXXXXXXXXXXX,
                          ,XXXXXXXXXXXXXXX,
                          ,XXXXXXXXXXXXXXX,
                          ,XXXXXXXXXXXXXXX.

       ..............      ...............
      ,XXXXXXXXXXXXXX,    ,XXXXXXXXXXXXXXX,
      ,XXXXXXXXXXXXXX,    ,XXXXXXXXXXXXXXX,
      ,XXXXXXXXXXXXXX,    ,XXXXXXXXXXXXXXX,
      ,XXXXXXXXXXXXXX,    ,XXXXXXXXXXXXXXX,
      ,XXXXXXXXXXXXXX,    ,XXXXXXXXXXXXXXX,
      ,XXXXXXXXXXXXXX,    ,XXXXXXXXXXXXXXX,
      ,XXXXXXXXXXXXXX,    ,XXXXXXXXXXXXXXX,
      ,XXXXXXXXXXXXXX,    ,XXXXXXXXXXXXXXX,

```

## Entries

'''

def entry_footer(hostname: str):
    return '''
    => gemini://{} Gemlog Index
    '''.format(hostname)

class LogEntry:
    def __init__(self, path, name, date):
        self.path = path
        self.name = name
        self.date = datetime.datetime.fromtimestamp(date)

def pp_logentry(e):
    print("{} | {} | {}".format(e.name,e.path,e.date))

def findGemlogEntries(d: str) -> [LogEntry]:
    entries = []
    for f in os.scandir(d):
        if f.is_file:
            date = f.stat().st_ctime
            path = f.path
            name = f.name
            entries.append(LogEntry(path, name, date))
    return entries


def render_article(article_filename, dst, hostname):
    '''
    Reading an article from the gemlog source, then rendering the same
    entry with the entry footer in the dst dir.
    '''
    with open(article_filename, 'r') as f:
        article = f.read() + entry_footer(hostname)
    dst_filename = os.path.join(dst, os.path.basename(article_filename))
    with open(dst_filename, 'w') as f:
        print(article, file=f)

def render_index(entries: [LogEntry], hostname: str) -> str:
    index = gemlog_header
    for e in entries:
        index += "=> {} [{}] {}\n".format("gemini://{}/{}".format(hostname, e.name), e.date.strftime('%d-%m-%Y'), e.name)
    return index

if __name__ == '__main__':
    argv = sys.argv
    if len(argv) >= 4:
        entries = findGemlogEntries(argv[1])
        dst_dir = argv[2]
        hostname = argv[3]
        entries.sort(key=(lambda x:x.date), reverse=True)
        if not os.path.exists(dst_dir):
            os.mkdir(dst_dir)
        [render_article(a.path, dst_dir, hostname) for a in entries]
        index = render_index(entries, hostname)
        with open(os.path.join(dst_dir, "index.gmi"), 'w') as f:
            print(index, file=f)
    else:
        print("Usage: ./alternativebit-gemlog gemlog_path dst_dir hostname")