#!/usr/bin/env python3
# ArchiveBox
# Nick Sweeting 2017 | MIT License
# https://github.com/pirate/ArchiveBox

import os
import sys

from datetime import datetime
from subprocess import run

from parse import parse_links
from links import (
    new_links,
    validate_links
)
from archive_methods import archive_links, _RESULTS_TOTALS
from index import (
    write_links_index,
    write_link_index,
    parse_json_links_index,
    parse_json_link_index,
)
from config import (
    ONLY_NEW,
    OUTPUT_PERMISSIONS,
    OUTPUT_DIR,
    ANSI,
    TIMEOUT,
    GIT_SHA,
)
from util import (
    download_url,
    progress,
    cleanup_archive,
    pretty_path,
    migrate_data,
)

__AUTHOR__ = 'Nick Sweeting <git@nicksweeting.com>'
__VERSION__ = GIT_SHA
__DESCRIPTION__ = 'ArchiveBox: Create a browsable html archive of a list of links.'
__DOCUMENTATION__ = 'https://github.com/pirate/ArchiveBox'

def print_help():
    print(__DESCRIPTION__)
    print("Documentation:     {}\n".format(__DOCUMENTATION__))
    print("Usage:")
    print("    ./bin/archivebox ~/Downloads/bookmarks_export.html\n")


def merge_links(archive_path=OUTPUT_DIR, import_path=None, only_new=False):
    """get new links from file and optionally append them to links in existing archive"""
    all_links = []
    if import_path:
        # parse and validate the import file
        raw_links = parse_links(import_path)
        all_links = validate_links(raw_links)

    # merge existing links in archive_path and new links
    existing_links = []
    if archive_path:
        existing_links = parse_json_links_index(archive_path)
        all_links = validate_links(existing_links + all_links)
    
    num_new_links = len(all_links) - len(existing_links)
    if num_new_links and not only_new:
        print('[{green}+{reset}] [{}] Adding {} new links from {} to {}/index.json'.format(
            datetime.now().strftime('%Y-%m-%d %H:%M:%S'),
            num_new_links,
            pretty_path(import_path),
            pretty_path(archive_path),
            **ANSI,
        ))
    # else:
    #     print('[*] [{}] No new links added to {}/index.json{}'.format(
    #         datetime.now().strftime('%Y-%m-%d %H:%M:%S'),
    #         archive_path,
    #         ' from {}'.format(import_path) if import_path else '',
    #         **ANSI,
    #     ))

    if only_new:
        return new_links(all_links, existing_links)

    return all_links

def update_archive(archive_path, links, source=None, resume=None, append=True):
    """update or create index.html+json given a path to an export file containing new links"""

    start_ts = datetime.now().timestamp()

    if resume:
        print('{green}[▶] [{}] Resuming archive downloading from {}...{reset}'.format(
             datetime.now().strftime('%Y-%m-%d %H:%M:%S'),
             resume,
             **ANSI,
        ))
    else:
        print('{green}[▶] [{}] Updating files for {} links in archive...{reset}'.format(
             datetime.now().strftime('%Y-%m-%d %H:%M:%S'),
             len(links),
             **ANSI,
        ))

    # loop over links and archive them
    archive_links(archive_path, links, source=source, resume=resume)

    # print timing information & summary
    end_ts = datetime.now().timestamp()
    seconds = end_ts - start_ts
    if seconds > 60:
        duration = '{0:.2f} min'.format(seconds / 60, 2)
    else:
        duration = '{0:.2f} sec'.format(seconds, 2)

    print('{}[√] [{}] Update of {} links complete ({}){}'.format(
        ANSI['green'],
        datetime.now().strftime('%Y-%m-%d %H:%M:%S'),
        len(links),
        duration,
        ANSI['reset'],
    ))
    print('    - {} entries skipped'.format(_RESULTS_TOTALS['skipped']))
    print('    - {} entries updated'.format(_RESULTS_TOTALS['succeded']))
    print('    - {} errors'.format(_RESULTS_TOTALS['failed']))


if __name__ == '__main__':
    argc = len(sys.argv)

    if set(sys.argv).intersection(('-h', '--help', 'help')):
        print_help()
        raise SystemExit(0)

    migrate_data()

    source = sys.argv[1] if argc > 1 else None  # path of links file to import
    resume = sys.argv[2] if argc > 2 else None  # timestamp to resume dowloading from
   
    if argc == 1:
        source, resume = None, None
    elif argc == 2:
        if all(d.isdigit() for d in sys.argv[1].split('.')):
            # argv[1] is a resume timestamp
            source, resume = None, sys.argv[1]
        else:
            # argv[1] is a path to a file to import
            source, resume = sys.argv[1].strip(), None
    elif argc == 3:
        source, resume = sys.argv[1].strip(), sys.argv[2]
    else:
        print_help()
        raise SystemExit(1)

    # See if archive folder already exists
    for out_dir in (OUTPUT_DIR, 'bookmarks', 'pocket', 'pinboard', 'html'):
        if os.path.exists(out_dir):
            break
    else:
        out_dir = OUTPUT_DIR

    # Step 0: Download url to local file (only happens if a URL is specified instead of local path) 
    if source and any(source.startswith(s) for s in ('http://', 'https://', 'ftp://')):
        source = download_url(source)

    # Step 1: Parse the links and dedupe them with existing archive
    links = merge_links(archive_path=out_dir, import_path=source, only_new=False)
    new_links = merge_links(archive_path=out_dir, import_path=source, only_new=True)

    # Step 2: Write new index
    write_links_index(out_dir=out_dir, links=links)

    # Step 3: Verify folder structure is 1:1 with index
    # cleanup_archive(out_dir, links)

    # Step 4: Run the archive methods for each link
    if ONLY_NEW:
        update_archive(out_dir, new_links, source=source, resume=resume, append=True)
    else:
        update_archive(out_dir, links, source=source, resume=resume, append=True)