from flask import current_app
from flask_migrate import upgrade
from . import db
from .models import Corpus, Role, User, TesseractOCRModel, TranskribusHTRModel
import click
import os


def _make_default_dirs():
    base_dir = current_app.config['NOPAQUE_DATA_DIR']

    default_directories = [
        os.path.join(base_dir, 'tmp'),
        os.path.join(base_dir, 'users')
    ]
    for directory in default_directories:
        if os.path.exists(directory):
            if not os.path.isdir(directory):
                raise NotADirectoryError(f'{directory} is not a directory')
        else:
            os.mkdir(directory)


def register(app):
    @app.cli.command()
    def deploy():
        ''' Run deployment tasks. '''
        # Make default directories
        _make_default_dirs()

        # migrate database to latest revision
        upgrade()

        # Insert/Update default database values
        current_app.logger.info('Insert/Update default roles')
        Role.insert_defaults()
        current_app.logger.info('Insert/Update default users')
        User.insert_defaults()
        current_app.logger.info('Insert/Update default TesseractOCRModels')
        TesseractOCRModel.insert_defaults()
        current_app.logger.info('Insert/Update default TranskribusHTRModels')
        TranskribusHTRModel.insert_defaults()

    @app.cli.group()
    def daemon():
        ''' Daemon commands. '''
        pass

    @daemon.command('run')
    def run_daemon():
        ''' Run daemon '''
        corpus: Corpus
        for corpus in Corpus.query.filter(Corpus.num_analysis_sessions > 0):
            corpus.num_analysis_sessions = 0
        db.session.commit()
        from app.daemon import Daemon
        daemon: Daemon = Daemon()
        daemon.run()

    @app.cli.group()
    def converter():
        ''' Converter commands. '''
        pass

    @converter.command()
    @click.argument('json_db')
    @click.argument('data_dir')
    def sandpaper(json_db, data_dir):
        ''' Sandpaper converter '''
        from app.converters.sandpaper import convert
        convert(json_db, data_dir)

    @app.cli.group()
    def test():
        ''' Test commands. '''
        pass

    @test.command('run')
    def run_test():
        ''' Run unit tests. '''
        from unittest import TestLoader, TextTestRunner
        from unittest.suite import TestSuite
        tests: TestSuite = TestLoader().discover('tests')
        TextTestRunner(verbosity=2).run(tests)