from io import StringIO
import os.path

from django.apps import apps
from django.conf import settings
from django.core.management import call_command
from django.core.management.base import BaseCommand
from django.db import connection

from ....account.utils import create_superuser
from ...utils.random_data import (
    add_address_to_admin,
    create_gift_card,
    create_menus,
    create_orders,
    create_page,
    create_permission_groups,
    create_product_sales,
    create_products_by_schema,
    create_shipping_zones,
    create_users,
    create_vouchers,
    create_warehouses,
    set_homepage_collection,
)
        
ADMIN_EMAIL = os.environ.get("ADMIN_EMAIL")
ADMIN_PASS = os.environ.get("ADMIN_PASS")

class Command(BaseCommand):
    help = "Populate database with test objects"
    placeholders_dir = "saleor/static/placeholders/"

    def add_arguments(self, parser):
        parser.add_argument(
            "--createsuperuser",
            action="store_true",
            dest="createsuperuser",
            default=False,
            help="Create admin account",
        )
        parser.add_argument(
            "--sampledata",
            action="store_true",
            dest="sampledata",
            default=False,
            help="Create sample products, etc..",
        )
        parser.add_argument(
            "--fastdata",
            action="store_true",
            dest="fastdata",
            default=False,
            help="Sacrifice some of the safeguards of sqlite3 for speed.",
        )
        parser.add_argument(
            "--withoutimages",
            action="store_true",
            dest="withoutimages",
            default=False,
            help="Don't create product images",
        )
        parser.add_argument(
            "--withoutsearch",
            action="store_true",
            dest="withoutsearch",
            default=False,
            help="Don't update search index",
        )
        parser.add_argument(
            "--skipsequencereset",
            action="store_true",
            dest="skipsequencereset",
            default=False,
            help="Don't reset SQL sequences that are out of sync.",
        )

    def make_database_faster(self):
        """Sacrifice some of the safeguards of sqlite3 for speed.
        Users are not likely to run this command in a production environment.
        They are even less likely to run it in production while using sqlite3.
        """
        if "sqlite3" in connection.settings_dict["ENGINE"]:
            cursor = connection.cursor()
            cursor.execute("PRAGMA temp_store = MEMORY;")
            cursor.execute("PRAGMA synchronous = OFF;")

    def sequence_reset(self):
        """Run a SQL sequence reset on all saleor.* apps.
        When a value is manually assigned to an auto-incrementing field
        it doesn't update the field's sequence, which might cause a conflict
        later on.
        """
        commands = StringIO()
        for app in apps.get_app_configs():
            if "saleor" in app.name:
                call_command(
                    "sqlsequencereset", app.label, stdout=commands, no_color=True
                )
        with connection.cursor() as cursor:
            cursor.execute(commands.getvalue())

    def handle(self, *args, **options):
        # set only our custom plugin to not call external API when preparing
        # example database
        settings.PLUGINS = [
            "saleor.payment.gateways.dummy.plugin.DummyGatewayPlugin",
            "saleor.payment.gateways.dummy_credit_card.plugin."
            "DummyCreditCardGatewayPlugin",
        ]

        if options["fastdata"]:
            self.make_database_faster()

        if options["sampledata"]:
            create_images = not options["withoutimages"]
            for msg in create_shipping_zones():
                self.stdout.write(msg)
            create_warehouses()
            self.stdout.write("Created warehouses")
            create_products_by_schema(self.placeholders_dir, create_images)
            self.stdout.write("Created products")
            for msg in create_product_sales(5):
                self.stdout.write(msg)
            for msg in create_vouchers():
                self.stdout.write(msg)
            for msg in create_gift_card():
                self.stdout.write(msg)
            for msg in create_users(20):
                self.stdout.write(msg)
            for msg in create_orders(20):
                self.stdout.write(msg)
            for msg in set_homepage_collection():
                self.stdout.write(msg)
            for msg in create_page():
                self.stdout.write(msg)
            for msg in create_menus():
                self.stdout.write(msg)

        if options["createsuperuser"]:
            credentials = {"email": ADMIN_EMAIL, "password": ADMIN_PASS}
            msg = create_superuser(credentials)
            self.stdout.write(msg)
            add_address_to_admin(credentials["email"])

        if not options["skipsequencereset"]:
            self.sequence_reset()

        for msg in create_permission_groups():
            self.stdout.write(msg)