#!/usr/bin/env python3
"""
ArchiveBox command line application.

./archive and ./bin/archivebox both point to this file, 
but you can also run it directly using `python3 archive.py`

Usage & Documentation:
    https://github.com/pirate/ArchiveBox/Wiki
"""

import os
import sys

from typing import List, Optional

from schema import Link
from links import links_after_timestamp
from index import write_links_index, load_links_index
from archive_methods import archive_link
from config import (
    ONLY_NEW,
    OUTPUT_DIR,
    GIT_SHA,
)
from util import (
    enforce_types,
    save_remote_source,
    save_stdin_source,
)
from logs import (
    log_archiving_started,
    log_archiving_paused,
    log_archiving_finished,
)

__AUTHOR__ = 'Nick Sweeting <git@nicksweeting.com>'
__VERSION__ = GIT_SHA[:9]
__DESCRIPTION__ = 'ArchiveBox: The self-hosted internet archive.'
__DOCUMENTATION__ = 'https://github.com/pirate/ArchiveBox/wiki'


def print_help():
    print('ArchiveBox: The self-hosted internet archive.\n')
    print("Documentation:")
    print("    https://github.com/pirate/ArchiveBox/wiki\n")
    print("UI Usage:")
    print("    Open output/index.html to view your archive.\n")
    print("CLI Usage:")
    print("    echo 'https://example.com' | ./archive\n")
    print("    ./archive ~/Downloads/bookmarks_export.html\n")
    print("    ./archive https://example.com/feed.rss\n")
    print("    ./archive 15109948213.123\n")


def main(*args) -> List[Link]:
    if set(args).intersection(('-h', '--help', 'help')) or len(args) > 2:
        print_help()
        raise SystemExit(0)

    if set(args).intersection(('--version', 'version')):
        print('ArchiveBox version {}'.format(__VERSION__))
        raise SystemExit(0)

    ### Handle CLI arguments
    #     ./archive bookmarks.html
    #     ./archive 1523422111.234
    import_path, resume = None, None
    if len(args) == 2:
        # if the argument is a string, it's a import_path file to import
        # if it's a number, it's a timestamp to resume archiving from
        if args[1].replace('.', '').isdigit():
            import_path, resume = None, args[1]
        else:
            import_path, resume = args[1], None

    ### Set up output folder
    if not os.path.exists(OUTPUT_DIR):
        os.makedirs(OUTPUT_DIR)

    ### Handle ingesting urls piped in through stdin
    # (.e.g if user does cat example_urls.txt | ./archive)
    if not sys.stdin.isatty():
        stdin_raw_text = sys.stdin.read()
        if stdin_raw_text and import_path:
            print(
                '[X] You should pass either a path as an argument, '
                'or pass a list of links via stdin, but not both.\n'
            )
            print_help()
            raise SystemExit(1)

        import_path = save_stdin_source(stdin_raw_text)

    ### Handle ingesting urls from a remote file/feed
    # (e.g. if an RSS feed URL is used as the import path) 
    if import_path and any(import_path.startswith(s) for s in ('http://', 'https://', 'ftp://')):
        import_path = save_remote_source(import_path)

    ### Run the main archive update process
    return update_archive_data(import_path=import_path, resume=resume)


@enforce_types
def update_archive_data(import_path: Optional[str]=None, resume: Optional[float]=None) -> List[Link]:
    """The main ArchiveBox entrancepoint. Everything starts here."""

    # Step 1: Load list of links from the existing index
    #         merge in and dedupe new links from import_path
    all_links, new_links = load_links_index(out_dir=OUTPUT_DIR, import_path=import_path)

    # Step 2: Write updated index with deduped old and new links back to disk
    write_links_index(out_dir=OUTPUT_DIR, links=list(all_links))

    # Step 3: Run the archive methods for each link
    links = new_links if ONLY_NEW else all_links
    log_archiving_started(len(links), resume)
    idx: int = 0
    link: Optional[Link] = None
    try:
        for idx, link in enumerate(links_after_timestamp(links, resume)):
            archive_link(link)

    except KeyboardInterrupt:
        log_archiving_paused(len(links), idx, link.timestamp if link else '0')
        raise SystemExit(0)

    except:
        print()
        raise    

    log_archiving_finished(len(links))

    # Step 4: Re-write links index with updated titles, icons, and resources
    all_links, _ = load_links_index(out_dir=OUTPUT_DIR)
    write_links_index(out_dir=OUTPUT_DIR, links=list(all_links), finished=True)
    return all_links

if __name__ == '__main__':
    main(*sys.argv)