from __future__ import annotations

from django.core.management.base import BaseCommand, CommandError
from django.contrib.auth import get_user_model

from orgs.models import Organization, UserProfile


class Command(BaseCommand):
    help = "Create demo users for an organization with roles and default passwords."

    def add_arguments(self, parser):
        parser.add_argument("--org", required=True, help="Organization code, id, or name")
        parser.add_argument("--owners", type=int, default=1, help="Number of owners to create (default: 1)")
        parser.add_argument("--managers", type=int, default=2, help="Number of managers to create (default: 2)")
        parser.add_argument("--drivers", type=int, default=2, help="Number of drivers to create (default: 2)")
        parser.add_argument("--customers", type=int, default=2, help="Number of customers to create (default: 2)")
        parser.add_argument("--auditors", type=int, default=0, help="Number of auditors to create (default: 0)")
        parser.add_argument("--password", default="password123", help="Password to set for demo users")
        parser.add_argument("--prefix", default=None, help="Username prefix (defaults to org code)")
        parser.add_argument("--email-domain", default="example.com", help="Email domain for users")
        parser.add_argument("--staff-owners", action="store_true", help="Mark owner users as staff for admin access")

    def handle(self, *args, **options):
        org_ident: str = options["org"]
        counts = {
            UserProfile.ROLE_OWNER: int(options["owners"]),
            UserProfile.ROLE_MANAGER: int(options["managers"]),
            UserProfile.ROLE_DRIVER: int(options["drivers"]),
            UserProfile.ROLE_CUSTOMER: int(options["customers"]),
            UserProfile.ROLE_AUDITOR: int(options["auditors"]),
        }
        password: str = options["password"]
        email_domain: str = options["email_domain"]
        staff_owners: bool = bool(options.get("staff_owners", False))

        # Resolve organization
        org = None
        if org_ident.isdigit():
            org = Organization.objects.filter(pk=int(org_ident)).first()
        if org is None:
            org = Organization.objects.filter(code=org_ident).first() or Organization.objects.filter(name=org_ident).first()
        if org is None:
            raise CommandError(f"Organization not found: {org_ident}")

        prefix = options.get("prefix") or org.code

        U = get_user_model()
        created = 0
        results = []

        for role, n in counts.items():
            for i in range(1, max(0, n) + 1):
                username = f"{prefix}-{role}-{i}"
                email = f"{username}@{email_domain}"
                user, was_created = U.objects.get_or_create(
                    username=username,
                    defaults={"email": email},
                )
                if was_created:
                    user.set_password(password)
                    if staff_owners and role == UserProfile.ROLE_OWNER:
                        user.is_staff = True
                    user.save()
                    profile, _ = UserProfile.objects.get_or_create(
                        user=user,
                        defaults={"organization": org, "role": role},
                    )
                    if profile.organization_id != org.id or profile.role != role:
                        profile.organization = org
                        profile.role = role
                        profile.save(update_fields=["organization", "role"])
                    created += 1
                    results.append((username, role))
                else:
                    # Ensure profile exists and matches org/role
                    profile, _ = UserProfile.objects.get_or_create(
                        user=user,
                        defaults={"organization": org, "role": role},
                    )
                    changed = False
                    if profile.organization_id != org.id:
                        profile.organization = org
                        changed = True
                    if profile.role != role:
                        profile.role = role
                        changed = True
                    if changed:
                        profile.save(update_fields=["organization", "role"])

        self.stdout.write(self.style.SUCCESS(
            f"Created {created} users for org {org.code}. Password='{password}'."
        ))
        if results:
            for uname, role in results[:10]:
                self.stdout.write(f"  - {uname} ({role})")
            if len(results) > 10:
                self.stdout.write(f"  ... and {len(results) - 10} more")