from __future__ import annotations

from dataclasses import dataclass
from typing import Iterable, List, Optional
from django.contrib.auth import get_user_model
from django.contrib.contenttypes.models import ContentType
from django.utils import timezone

from orgs.models import Organization
from recycle_core.models import Document


@dataclass
class PickupRequestData:
    organization: Organization
    name: str
    email: str = ""
    phone: str = ""
    address: str = ""
    materials: str = ""
    preferred_at: Optional[timezone.datetime] = None
    files: Optional[Iterable] = None  # iterable of UploadedFile
    created_by: Optional[object] = None  # User, but avoid circular import typing


@dataclass
class PickupRequestResult:
    ok: bool
    lead_id: Optional[int] = None
    error: Optional[str] = None
    document_ids: List[int] = None


class PickupRequestController:
    """Application layer controller for the fast-path pickup request.

    - Creates a Lead scoped to an Organization
    - Stores any uploaded photos/documents as Document records attached to the Lead
    """

    def submit(self, data: PickupRequestData) -> PickupRequestResult:
        from public_frontend.models import Lead  # import locally to avoid circular imports

        try:
            # Prepare message body for staff
            message = (
                f"Pickup Request\n"
                f"Address: {data.address}\n"
                f"Preferred: {data.preferred_at or ''}\n"
                f"Materials: {data.materials or ''}"
            )

            lead = Lead.objects.create(
                organization=data.organization,
                name=data.name,
                email=data.email or "",
                phone=data.phone or "",
                subject="Pickup Request",
                message=message,
                source="pickup_request",
                created_by=data.created_by if getattr(data, "created_by", None) else None,
            )

            # Attach uploaded files as Documents linked to the Lead
            doc_ids: List[int] = []
            if data.files:
                ct = ContentType.objects.get_for_model(Lead)
                for idx, f in enumerate(data.files):
                    doc = Document.objects.create(
                        organization=data.organization,
                        file=f,
                        kind="pickup_request",
                        content_type=ct,
                        object_id=lead.id,
                        uploaded_by=None,
                    )
                    doc_ids.append(doc.id)

            return PickupRequestResult(ok=True, lead_id=lead.id, document_ids=doc_ids)

        except Exception as e:
            return PickupRequestResult(ok=False, error=str(e), document_ids=[])