from transformers import DetrImageProcessor, DetrForObjectDetection
import torch
from PIL import Image,ImageDraw
import requests
import gradio as gr
from gtts import gTTS
import random
from collections import Counter


url = "http://images.cocodataset.org/val2017/000000039769.jpg"
image = Image.open(requests.get(url, stream=True).raw)

# you can specify the revision tag if you don't want the timm dependency
processor = DetrImageProcessor.from_pretrained("facebook/detr-resnet-50", revision="no_timm")
model = DetrForObjectDetection.from_pretrained("facebook/detr-resnet-50", revision="no_timm")

inputs = processor(images=image, return_tensors="pt")
outputs = model(**inputs)

# convert outputs (bounding boxes and class logits) to COCO API
# let's only keep detections with score > 0.9
target_sizes = torch.tensor([image.size[::-1]])
results = processor.post_process_object_detection(outputs, target_sizes=target_sizes, threshold=0.9)[0]

for score, label, box in zip(results["scores"], results["labels"], results["boxes"]):
    box = [round(i, 2) for i in box.tolist()]
    print(
            f"Detected {model.config.id2label[label.item()]} with confidence "
            f"{round(score.item(), 3)} at location {box}"
    )


# Load model and processor
model_name = "facebook/detr-resnet-50"
processor = DetrImageProcessor.from_pretrained(model_name)
model = DetrForObjectDetection.from_pretrained(model_name)

# Move model to GPU if available
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
model.to(device)

# Function to generate random colors
def random_color():
    return "#{:02x}{:02x}{:02x}".format(random.randint(100, 255), random.randint(100, 255), random.randint(100, 255))

# Object detection function
def detect_objects(image):
    # Resize image for better detection
    image = image.resize((800, 800))

    # Process image
    inputs = processor(images=image, return_tensors="pt").to(device)

    with torch.no_grad():
        outputs = model(**inputs)

    # Extract bounding boxes and labels
    target_sizes = [image.size[::-1]]
    results = processor.post_process_object_detection(outputs, target_sizes=target_sizes)[0]

    # Apply confidence threshold
    keep = results["scores"] > 0.5
    boxes = results["boxes"][keep]
    labels = results["labels"][keep]

    # Create a copy of the image
    image_draw = image.copy()
    draw = ImageDraw.Draw(image_draw)

    label_counts = Counter()
    colors = {}

    # Draw bounding boxes and count labels
    for box, label in zip(boxes, labels):
        box = [int(i) for i in box.tolist()]
        label_text = model.config.id2label[label.item()]

        label_counts[label_text] += 1  # Count occurrences

        if label_text not in colors:
            colors[label_text] = random_color()

        draw.rectangle(box, outline=colors[label_text], width=5)

    # Prepare HTML output for labels
    styled_labels = [
        f"<span style='background-color:{colors[label]}; color:white; padding:8px 15px; border-radius:10px; margin-right:10px;'>"
        f"{label} (x{count})</span>"
        for label, count in label_counts.items()
    ]

    labels_html = "<div style='display:flex; flex-wrap:wrap; gap:10px;'>" + " ".join(styled_labels) + "</div>"

    # Convert detected objects into speech
    detected_objects = ", ".join([f"{label} ({count} times)" for label, count in label_counts.items()])
    description = f"I detected the following objects: {detected_objects}." if detected_objects else "No objects detected, please try another image."

    # Save audio
    audio_path = "detected_objects.mp3"
    tts = gTTS(description)
    tts.save(audio_path)

    return image_draw, labels_html, audio_path

# Gradio Interface
interface = gr.Interface(
    fn=detect_objects,
    inputs=gr.Image(type="pil", label="Upload an Image"),
    outputs=[
        gr.Image(label="Detected Objects"),
        gr.HTML(label="Detected Labels"),
        gr.Audio(label="Audio Description")
    ],
    title="AI Assistant for Visually Impaired",
    description="This app detects objects in an image and provides an audio description."
)

# Launch
interface.launch()