from flask import Flask, request, jsonify
from PIL import Image
import base64
from io import BytesIO
import numpy as np
import cv2
import insightface
import onnxruntime as ort
import huggingface_hub
from SegCloth import segment_clothing
from transparent_background import Remover

app = Flask(__name__)

# Charger le modèle
def load_model():
    path = huggingface_hub.hf_hub_download("public-data/insightface", "models/scrfd_person_2.5g.onnx")
    options = ort.SessionOptions()
    options.intra_op_num_threads = 8
    options.inter_op_num_threads = 8
    session = ort.InferenceSession(
        path, sess_options=options, providers=["CPUExecutionProvider", "CUDAExecutionProvider"]
    )
    model = insightface.model_zoo.retinaface.RetinaFace(model_file=path, session=session)
    return model

detector = load_model()
detector.prepare(-1, nms_thresh=0.5, input_size=(640, 640))

# Fonction pour décoder une image encodée en base64 en objet PIL.Image.Image
def decode_image_from_base64(image_data):
    image_data = base64.b64decode(image_data)
    image = Image.open(BytesIO(image_data)).convert("RGB")  # Convertir en RGB pour éviter les problèmes de canal alpha
    return image

# Fonction pour encoder une image PIL en base64
def encode_image_to_base64(image):
    buffered = BytesIO()
    image.save(buffered, format="PNG")
    return base64.b64encode(buffered.getvalue()).decode('utf-8')

#@spaces.GPU
def remove_background(image):
    remover = Remover()
    if isinstance(image, Image.Image):
        output = remover.process(image)
    elif isinstance(image, np.ndarray):
        image_pil = Image.fromarray(image)
        output = remover.process(image_pil)
    else:
        raise TypeError("Unsupported image type")
    return output

# Détecter les personnes et segmenter leurs vêtements
def detect_and_segment_persons(image, clothes):
    img = np.array(image)
    img = img[:, :, ::-1]  # RGB -> BGR

    bboxes, kpss = detector.detect(img)
    if bboxes.shape[0] == 0:  # Aucun visage détecté
        return []

    height, width, _ = img.shape  # Get image dimensions

    bboxes = np.round(bboxes[:, :4]).astype(int)
    
    # Clamp bounding boxes within image boundaries
    bboxes[:, 0] = np.clip(bboxes[:, 0], 0, width)   # x1
    bboxes[:, 1] = np.clip(bboxes[:, 1], 0, height)  # y1
    bboxes[:, 2] = np.clip(bboxes[:, 2], 0, width)   # x2
    bboxes[:, 3] = np.clip(bboxes[:, 3], 0, height)  # y2

    all_segmented_images = []
    for i in range(bboxes.shape[0]):
        bbox = bboxes[i]
        x1, y1, x2, y2 = bbox
        person_img = img[y1:y2, x1:x2]

        # Convert numpy array to PIL Image
        pil_img = Image.fromarray(person_img[:, :, ::-1])  # BGR -> RGB

        # Segment clothing for the detected person
        img_rm_background = remove_background(pil_img)
        segmented_result = segment_clothing(img_rm_background, clothes)

        # Combine the segmented images for all persons
        all_segmented_images.extend(segmented_result)

    return all_segmented_images

@app.route('/', methods=['GET'])
def welcome():
   return "Welcome to Clothing Segmentation API"

@app.route('/api/detect', methods=['POST'])
def detect():
    try:
        data = request.json
        image_base64 = data['image']
        image = decode_image_from_base64(image_base64)
        
        # Détection et segmentation des personnes
        clothes = ["Upper-clothes", "Skirt", "Pants", "Dress"]
        person_images_base64 = detect_and_segment_persons(image, clothes)
        
        return jsonify({'images': person_images_base64})
    except Exception as e:
        print(e)
        return jsonify({'error': str(e)}), 500

if __name__ == "__main__":
    app.run(debug=True, host="0.0.0.0", port=7860)