content_quality_tool/bg_remover/views.py

# # background_remover/views.py
# import io
# from PIL import Image
# from django.http import HttpResponse
# from rest_framework.views import APIView
# from rest_framework.parsers import MultiPartParser
# from .services import BiRefNetService
# from django.shortcuts import render
# import zipfile
# import time

# class BackgroundRemovalView(APIView):
#     parser_classes = [MultiPartParser]

#     def get(self, request):
#         return render(request, "bg_remover_index.html")

#     def post(self, request, *args, **kwargs):
#         if 'image' not in request.FILES:
#             return HttpResponse("No image provided", status=400)

#         # 1. Load image from request
#         input_file = request.FILES['image']
#         input_image = Image.open(input_file)

#         # 2. Process via Service
#         service = BiRefNetService()
#         output_image = service.remove_background(input_image)

#         # 3. Prepare response
#         buffer = io.BytesIO()
#         output_image.save(buffer, format="PNG")
        
#         return HttpResponse(buffer.getvalue(), content_type="image/png")
    
# class BulkBackgroundRemovalAPI(APIView):
#     parser_classes = [MultiPartParser]

#     def post(self, request):
#         files = request.FILES.getlist("images")

#         if not files:
#             return HttpResponse({"error": "No images provided"}, status=400)

#         service = BiRefNetService()
#         start_time = time.time()

#         zip_buffer = io.BytesIO()

#         # with zipfile.ZipFile(zip_buffer, "w", zipfile.ZIP_DEFLATED) as zip_file:
#             # for file in files:
#             #     try:
#             #         image = Image.open(file).convert("RGB")
#             #         output = service.remove_background(image)

#             #         img_buffer = io.BytesIO()
#             #         output.save(img_buffer, format="PNG")

#             #         name = file.name.rsplit(".", 1)[0] + "_whitebg.png"
#             #         zip_file.writestr(name, img_buffer.getvalue())

#             #     except Exception as e:
#             #         print(f"Error processing {file.name}: {e}")

#         with zipfile.ZipFile(zip_buffer, "w", zipfile.ZIP_DEFLATED) as master_zip:
#             for file in files:
#                 # CHECK IF FILE IS A ZIP
#                 if file.name.lower().endswith('.zip'):
#                     with zipfile.ZipFile(file, 'r') as user_zip:
#                         for inner_file_name in user_zip.namelist():
#                             # Skip directories and non-image files
#                             if inner_file_name.endswith(('.png', '.jpg', '.jpeg', '.webp')):
#                                 with user_zip.open(inner_file_name) as inner_file:
#                                     img_data = inner_file.read()
#                                     image = Image.open(io.BytesIO(img_data)).convert("RGB")
#                                     output = service.remove_background(image)
                                    
#                                     img_io = io.BytesIO()
#                                     output.save(img_io, format="PNG")
                                    
#                                     # Create clean name for the output zip
#                                     clean_name = inner_file_name.rsplit(".", 1)[0].split('/')[-1] + "_no_bg.png"
#                                     master_zip.writestr(clean_name, img_io.getvalue())
                
#                 # PROCESS INDIVIDUAL IMAGES (Existing logic)
#                 else:
#                     try:
#                         image = Image.open(file).convert("RGB")
#                         output = service.remove_background(image)
#                         img_io = io.BytesIO()
#                         output.save(img_io, format="PNG")
#                         name = file.name.rsplit(".", 1)[0] + "_no_bg.png"
#                         master_zip.writestr(name, img_io.getvalue())
#                     except Exception as e:
#                         print(f"Error processing {file.name}: {e}")
#         zip_buffer.seek(0)
#         total_time = round(time.time() - start_time, 2)

#         response = HttpResponse(
#             zip_buffer.getvalue(),
#             content_type="application/zip"
#         )
#         response["Content-Disposition"] = "attachment; filename=processed_images.zip"
#         response["X-Processing-Time"] = f"{total_time}s"

#         return response    




import uuid
import threading
import os
import io
import zipfile
import csv
from django.shortcuts import render
from django.http import HttpResponse, JsonResponse
from django.conf import settings
from rest_framework.views import APIView
from rest_framework.parsers import MultiPartParser
from PIL import Image

from .models import BackgroundTask
from .services import BiRefNetService


class BackgroundRemovalView(APIView):
    parser_classes = [MultiPartParser]

    def get(self, request):
        return render(request, "bg_remover_index.html")

    def post(self, request, *args, **kwargs):
        if 'image' not in request.FILES:
            return HttpResponse("No image provided", status=400)

        # 1. Load image from request
        input_file = request.FILES['image']
        input_image = Image.open(input_file)

        # 2. Process via Service
        service = BiRefNetService()
        output_image = service.remove_background(input_image)

        # 3. Prepare response
        buffer = io.BytesIO()
        output_image.save(buffer, format="PNG")
        
        return HttpResponse(buffer.getvalue(), content_type="image/png")
    

class BulkBackgroundRemovalAPI(APIView):
    parser_classes = [MultiPartParser]

    def post(self, request):
        files = request.FILES.getlist("images")
        if not files:
            return JsonResponse({"error": "No images provided"}, status=400)

        # 1. Create a database record for the task
        task_id = uuid.uuid4()
        BackgroundTask.objects.create(task_id=task_id, status='PROCESSING')

        # 2. Read files into memory to pass to the thread
        file_list = []
        for f in files:
            file_list.append({
                "name": f.name,
                "content": f.read()
            })

        # 3. Start background thread
        thread = threading.Thread(
            target=self.process_images_logic, 
            args=(task_id, file_list)
        )
        thread.start()

        return JsonResponse({
            "task_id": str(task_id),
            "message": "Task started",
            "status_url": f"/api/status/{task_id}/"
        }, status=202)

    def process_images_logic(self, task_id, file_list):
        """Heavy AI logic running in background"""
        service = BiRefNetService()
        log_data = []
        
        # Prepare folders
        folder_path = os.path.join(settings.MEDIA_ROOT, 'bulk_results', str(task_id))
        os.makedirs(folder_path, exist_ok=True)
        zip_filename = f"result_{task_id}.zip"
        zip_abs_path = os.path.join(folder_path, zip_filename)

        try:
            with zipfile.ZipFile(zip_abs_path, "w", zipfile.ZIP_DEFLATED) as master_zip:
                for item in file_list:
                    name, content = item["name"], item["content"]
                    
                    try:
                        # Process if it's a zip
                        if name.lower().endswith('.zip'):
                            with zipfile.ZipFile(io.BytesIO(content)) as user_zip:
                                for inner_name in user_zip.namelist():
                                    if inner_name.lower().endswith(('.png', '.jpg', '.jpeg', '.webp')):
                                        with user_zip.open(inner_name) as inner_file:
                                            img = Image.open(io.BytesIO(inner_file.read())).convert("RGB")
                                            out = service.remove_background(img)
                                            buf = io.BytesIO()
                                            out.save(buf, format="PNG")
                                            master_zip.writestr(f"no_bg_{inner_name.split('/')[-1]}", buf.getvalue())
                                            log_data.append([inner_name, "SUCCESS", "Done"])
                        
                        # Process if it's an image
                        else:
                            img = Image.open(io.BytesIO(content)).convert("RGB")
                            out = service.remove_background(img)
                            buf = io.BytesIO()
                            out.save(buf, format="PNG")
                            clean_name = name.rsplit(".", 1)[0] + "_no_bg.png"
                            master_zip.writestr(clean_name, buf.getvalue())
                            log_data.append([name, "SUCCESS", "Done"])

                    except Exception as e:
                        log_data.append([name, "FAIL", str(e)])

                # Create CSV Log inside the Zip
                csv_buf = io.StringIO()
                writer = csv.writer(csv_buf)
                writer.writerow(["Filename", "Status", "Message"])
                writer.writerows(log_data)
                master_zip.writestr("processing_report.csv", csv_buf.getvalue())

            # 4. Update model to COMPLETED
            task = BackgroundTask.objects.get(task_id=task_id)
            task.status = 'COMPLETED'
            # Save the relative path for the FileField
            task.zip_file = f"bulk_results/{task_id}/{zip_filename}"
            task.save()

        except Exception as e:
            task = BackgroundTask.objects.get(task_id=task_id)
            task.status = 'FAILED'
            task.error_message = str(e)
            task.save()


class TaskStatusAPI(APIView):
    def get(self, request, task_id):
        try:
            task = BackgroundTask.objects.get(task_id=task_id)
            return JsonResponse({
                "task_id": task.task_id,
                "status": task.status,
                "download_url": task.zip_file.url if task.zip_file else None,
                "error": task.error_message
            })
        except BackgroundTask.DoesNotExist:
            return JsonResponse({"error": "Task not found"}, status=404)
        
class TaskHistoryListView(APIView):
    def get(self, request):
        # Fetch latest 20 tasks
        tasks = BackgroundTask.objects.all().order_by('-created_at')[:20]
        data = []
        for t in tasks:
            data.append({
                "task_id": str(t.task_id),
                "status": t.status,
                "created_at": t.created_at.strftime("%Y-%m-%d %H:%M"),
                "download_url": t.zip_file.url if t.zip_file else None
            })
        return HttpResponse(data) 

# Make sure this name matches what you put in urls.py
class TaskHistoryAPI(APIView): 
    def get(self, request):
        # Fetch latest 20 tasks
        tasks = BackgroundTask.objects.all().order_by('-created_at')[:20]
        data = []
        for t in tasks:
            data.append({
                "task_id": str(t.task_id),
                "status": t.status,
                # Using 'date' key to match the JS 't.date' in the history page
                "date": t.created_at.strftime("%Y-%m-%d %H:%M"), 
                "url": t.zip_file.url if t.zip_file else None
            })
        # Use JsonResponse so the frontend can read it as an object
        return JsonResponse(data, safe=False)

class TaskHistoryPageView(APIView):
    def get(self, request):
        return render(request, "bg_remover_history.html")