#!/opt/anaconda1anaconda2anaconda3/bin/python
# -*- coding: utf-8

import sys
import argparse

import anvio.db as db
import anvio.tables as t
import anvio.dbops as dbops
import anvio.terminal as terminal 

from anvio.errors import ConfigError


run = terminal.Run()
progress = terminal.Progress()

current_version = '7'
next_version    = '8'

def update_contigs_db(contigs_db_path, just_do_it = False):
    if contigs_db_path is None:
        raise ConfigError("No database path is given.")

    # make sure someone is not being funny
    dbops.is_contigs_db(contigs_db_path)

    # make sure the version is 2
    contigs_db = db.DB(contigs_db_path, None, ignore_version = True)
    if str(contigs_db.get_version()) != current_version:
        raise ConfigError("Version of this contigs database is not %s (hence, this script cannot really do anything)." % current_version)

    if not just_do_it:
        try:
            run.warning("This script will try to upgrade your contigs database from v%s to v%s. It happens to be that this\
                         upgrade will in fact remove every functional annotation from the database, and you will need to\
                         re-import them. If you have never dealt with functions, you don't need to care. If you did, continue\
                         reading. If you imported your functions using the program `anvi-import-functions` with a parser,\
                         you may want to save the content of the `gene_functions` table using the program `anvi-export-table`\
                         program. BUT, if you used the program `anvi-run-ncbi-cogs`, just re-run it without trying to do any\
                         hacks. Really. Make your life simpler. If you think you are ready, just press ENTER to continue.\
                         If you want to cancel the upgrade and think more about it, press CTRL+C now. If you want to avoid\
                         this message the next time, use '--just-do-it'." % (current_version, next_version))
            input("Press ENTER to continue...\n")
        except:
            print()
            sys.exit()

    progress.new("Trying to upgrade the contigs database")
    progress.update('...')

    # bye, gene_functions content
    contigs_db._exec('''DELETE FROM %s''' % t.gene_function_calls_table_name)
    contigs_db.remove_meta_key_value_pair('gene_function_sources')
    contigs_db.set_meta_value('gene_function_sources', None)
    contigs_db.commit()

    # set the version
    contigs_db.remove_meta_key_value_pair('version')
    contigs_db.set_version(next_version)

    # bye
    contigs_db.disconnect()

    # bye
    progress.end()
    run.info_single("The contigs database successfully upgraded from version %s to %s!" % (current_version, next_version))
    run.warning("The only thing this upgrade did was to reset your functional annotations :/ \
                 But you know, `anvi-run-ncbi-cogs` is pretty fast!")

if __name__ == '__main__':
    parser = argparse.ArgumentParser(description='A simple script to upgrade contigs database from version %s to version %s' % (current_version, next_version))
    parser.add_argument('contigs_db', metavar = 'CONTIGS_DB', help = 'Contigs database')
    parser.add_argument('--just-do-it', default=False, action="store_true", help = "Do not bother me with warnings")
    args = parser.parse_args()

    try:
        update_contigs_db(args.contigs_db, just_do_it = args.just_do_it)
    except ConfigError as e:
        print(e)
        sys.exit(-1)
