from django.core.management.base import NoArgsCommand

from django.core.management.color import no_style

from optparse import make_option

import sys

try:

    set

except NameError:

    from sets import Set as set   # Python 2.3 fallback

class Command(NoArgsCommand):

    option_list = NoArgsCommand.option_list + (

        make_option('--verbosity', action='store', dest='verbosity', default='1',

            type='choice', choices=['0', '1', '2'],

            help='Verbosity level; 0=minimal output, 1=normal output, 2=all output'),

        make_option('--noinput', action='store_false', dest='interactive', default=True,

            help='Tells Django to NOT prompt the user for input of any kind.'),

    )

    help = "Create the database tables for all apps in INSTALLED_APPS whose tables haven't already been created."

    def handle_noargs(self, **options):

        from django.db import connection, transaction, models

        from django.conf import settings

        from django.core.management.sql import table_names, installed_models, sql_model_create, sql_for_pending_references, many_to_many_sql_for_model, custom_sql_for_model, sql_indexes_for_model, emit_post_sync_signal

        verbosity = int(options.get('verbosity', 1))

        interactive = options.get('interactive')

        self.style = no_style()

        # Import the 'management' module within each installed app, to register

        # dispatcher events.

        for app_name in settings.INSTALLED_APPS:

            try:

                __import__(app_name + '.management', {}, {}, [''])

            except ImportError, exc:

                if not exc.args[0].startswith('No module named management'):

                    raise

        cursor = connection.cursor()

        if connection.features.uses_case_insensitive_names:

            table_name_converter = lambda x: x.upper()

        else:

            table_name_converter = lambda x: x

        # Get a list of all existing database tables, so we know what needs to

        # be added.

        tables = [table_name_converter(name) for name in table_names()]

        # Get a list of already installed *models* so that references work right.

        seen_models = installed_models(tables)

        created_models = set()

        pending_references = {}

        # Create the tables for each model

        for app in models.get_apps():

            app_name = app.__name__.split('.')[-2]

            model_list = models.get_models(app)

            for model in model_list:

                # Create the model's database table, if it doesn't already exist.

                if verbosity >= 2:

                    print "Processing %s.%s model" % (app_name, model._meta.object_name)

                if table_name_converter(model._meta.db_table) in tables:

                    continue

                sql, references = sql_model_create(model, self.style, seen_models)

                seen_models.add(model)

                created_models.add(model)

                for refto, refs in references.items():

                    pending_references.setdefault(refto, []).extend(refs)

                    if refto in seen_models:

                        sql.extend(sql_for_pending_references(refto, self.style, pending_references))

                sql.extend(sql_for_pending_references(model, self.style, pending_references))

                if verbosity >= 1:

                    print "Creating table %s" % model._meta.db_table

                for statement in sql:

                    cursor.execute(statement)

                tables.append(table_name_converter(model._meta.db_table))

        # Create the m2m tables. This must be done after all tables have been created

        # to ensure that all referred tables will exist.

        for app in models.get_apps():

            app_name = app.__name__.split('.')[-2]

            model_list = models.get_models(app)

            for model in model_list:

                if model in created_models:

                    sql = many_to_many_sql_for_model(model, self.style)

                    if sql:

                        if verbosity >= 2:

                            print "Creating many-to-many tables for %s.%s model" % (app_name, model._meta.object_name)

                        for statement in sql:

                            cursor.execute(statement)

        transaction.commit_unless_managed()

        # Send the post_syncdb signal, so individual apps can do whatever they need

        # to do at this point.

        emit_post_sync_signal(created_models, verbosity, interactive)

        # Install custom SQL for the app (but only if this

        # is a model we've just created)

        for app in models.get_apps():

            app_name = app.__name__.split('.')[-2]

            for model in models.get_models(app):

                if model in created_models:

                    custom_sql = custom_sql_for_model(model)

                    if custom_sql:

                        if verbosity >= 1:

                            print "Installing custom SQL for %s.%s model" % (app_name, model._meta.object_name)

                        try:

                            for sql in custom_sql:

                                cursor.execute(sql)

                        except Exception, e:

                            sys.stderr.write("Failed to install custom SQL for %s.%s model: %s" % \

                                                (app_name, model._meta.object_name, e))

                            transaction.rollback_unless_managed()

                        else:

                            transaction.commit_unless_managed()

        # Install SQL indicies for all newly created models

        for app in models.get_apps():

            app_name = app.__name__.split('.')[-2]

            for model in models.get_models(app):

                if model in created_models:

                    index_sql = sql_indexes_for_model(model, self.style)

                    if index_sql:

                        if verbosity >= 1:

                            print "Installing index for %s.%s model" % (app_name, model._meta.object_name)

                        try:

                            for sql in index_sql:

                                cursor.execute(sql)

                        except Exception, e:

                            sys.stderr.write("Failed to install index for %s.%s model: %s" % \

                                                (app_name, model._meta.object_name, e))

                            transaction.rollback_unless_managed()

                        else:

                            transaction.commit_unless_managed()

        # Install the 'initial_data' fixture, using format discovery

        from django.core.management import call_command

        call_command('loaddata', 'initial_data', verbosity=verbosity)