from typing import List, Optional
from uuid import UUID
from django.http import HttpRequest
from ninja import Router, File, Form
from ninja.files import UploadedFile
from django.shortcuts import get_object_or_404

from games.models import Game
from .models import Submission, SubmissionFile, ImageCrop, OCRStatus, Scope
from .schemas import SubmissionOut, ImageCropIn, ImageCropOut, ScopeOut
from .tasks import process_submission_file, process_crop

router = Router()

PREFIX = "/events/{event_path}/submissions"


@router.get(f"{PREFIX}/scopes/mine", response={200: list[ScopeOut], 403: dict})
def list_my_scopes(request: HttpRequest, event_path: str, game_path: str):
    if not request.user.is_authenticated:
        return 403, {"detail": "Authentication required"}

    game = get_object_or_404(
        Game.objects.enabled_for_event(request.event), path=game_path
    )

    return Scope.objects.filter(
        event_game__event=request.event,
        event_game__game=game,
        assigned_users=request.user,
    )


@router.get(f"{PREFIX}/{{game_path}}/available-scopes", response={200: list[ScopeOut], 403: dict})
def list_available_scopes(request: HttpRequest, event_path: str, game_path: str):
    """Scopes the current user may submit to for this game - superusers see
    every active scope, everyone else only the ones assigned to them. Used
    by the submissions-select and submissions-detail pages, both to list
    scopes and (for the detail page) to confirm the requested scope_id is
    one the current user is actually allowed to see."""
    if not request.user.is_authenticated:
        return 403, {"detail": "Authentication required"}

    game = get_object_or_404(
        Game.objects.enabled_for_event(request.event), path=game_path
    )

    scopes = (
        Scope.objects.filter(
            event_game__event=request.event,
            event_game__game=game,
            is_active=True,
        )
        if request.user.is_superuser
        else Scope.objects.filter(
            event_game__event=request.event,
            event_game__game=game,
            assigned_users=request.user,
            is_active=True,
        )
    )

    return list(scopes.order_by("name"))


@router.post(f"{PREFIX}/submission/create", response={200: SubmissionOut, 403: dict})
def create_submission(
    request: HttpRequest,
    event_path: str,
    scope_id: UUID,
    files: List[UploadedFile] = File(...),
    notes: Optional[str] = Form(None),
):
    if not request.user.is_authenticated:
        return 403, {"detail": "Authentication required"}

    scope = get_object_or_404(
        Scope, id=scope_id, event_game__event=request.event, is_active=True
    )

    if (
        not request.user.is_staff
        and not scope.assigned_users.filter(pk=request.user.pk).exists()
    ):
        return 403, {"detail": "You are not assigned to this scope"}

    submission = Submission.objects.create(
        event=request.event,
        scope=scope,
        user=request.user,
        notes=notes or None,
    )

    for file in files:
        SubmissionFile.objects.create(
            submission=submission,
            file=file,
            original_filename=file.name,
            content_type=file.content_type or "application/octet-stream",
        )

    return submission


@router.get(
    f"{PREFIX}/submission/by/user", response={200: list[SubmissionOut], 403: dict}
)
def list_user_submissions(request: HttpRequest, event_path: str, scope_id: UUID):
    if not request.user.is_authenticated:
        return 403, {"detail": "Authentication required"}

    submissions = Submission.for_event.filter(
        scope_id=scope_id, user=request.user
    ).order_by("-created_at")
    return submissions


@router.get(f"{PREFIX}/submission/by/game", response=list[SubmissionOut])
def list_submissions_by_game(request: HttpRequest, event_path: str, game_path: str):
    game = get_object_or_404(Game, path=game_path)

    if not request.user.is_staff:
        return 403, {"detail": "Admin access required"}

    return Submission.for_event.filter(scope__event_game__game=game)


@router.get(f"{PREFIX}/submission/{{submission_id}}", response=SubmissionOut)
def get_submission(request: HttpRequest, event_path: str, submission_id: UUID):
    submission = get_object_or_404(Submission.for_event, id=submission_id)

    if submission.user != request.user and not request.user.is_staff:
        return 403, {"detail": "Not authorized"}

    return submission


@router.post(f"{PREFIX}/crops/s/{{submission_file_id}}", response=ImageCropOut)
def create_image_crop(
    request: HttpRequest,
    event_path: str,
    submission_file_id: UUID,
    data: ImageCropIn,
):
    if not request.user.is_staff:
        return 403, {"detail": "Admin access required"}

    submission_file = get_object_or_404(
        SubmissionFile, id=submission_file_id, submission__event=request.event
    )

    crop = ImageCrop.objects.create(
        submission_file=submission_file,
        x1=data.x1,
        y1=data.y1,
        x2=data.x2,
        y2=data.y2,
        label=data.label or "",
        ocr_status=OCRStatus.TO_PROCESS,
    )

    return crop


@router.delete(f"{PREFIX}/crops/{{crop_id}}", response=dict)
def delete_image_crop(request: HttpRequest, event_path: str, crop_id: UUID):
    if not request.user.is_staff:
        return 403, {"detail": "Admin access required"}

    crop = get_object_or_404(
        ImageCrop, id=crop_id, submission_file__submission__event=request.event
    )
    crop.delete()

    return {"status": "deleted"}


@router.post(f"{PREFIX}/files/{{file_id}}/process-ocr", response=dict)
def process_file_ocr(request: HttpRequest, event_path: str, file_id: UUID):
    if not request.user.is_staff:
        return 403, {"detail": "Admin access required"}

    submission_file = get_object_or_404(
        SubmissionFile, id=file_id, submission__event=request.event
    )
    submission_file.ocr_status = OCRStatus.TO_PROCESS
    submission_file.save()

    # Enqueue the OCR processing task
    process_submission_file.enqueue(str(file_id))

    return {"status": "queued"}


@router.post(f"{PREFIX}/crops/{{crop_id}}/process-ocr", response=dict)
def process_crop_ocr(request: HttpRequest, event_path: str, crop_id: UUID):
    if not request.user.is_staff:
        return 403, {"detail": "Admin access required"}

    crop = get_object_or_404(
        ImageCrop, id=crop_id, submission_file__submission__event=request.event
    )
    crop.ocr_status = OCRStatus.TO_PROCESS
    crop.save()

    # Enqueue the OCR processing task
    process_crop.enqueue(str(crop_id))

    return {"status": "queued"}