import gradio as gr
from PIL import Image
from datetime import datetime
from ocr_engine import extract_weight

def process_image(image):
    if image is None:
        return "No image received", None, None

    weight = extract_weight(image)
    now = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
    return f"{weight} grams", now, image

with gr.Blocks() as demo:
    gr.Markdown("## 📷 Auto Weight Logger — OCR-Based Smart Scale Reader")
    gr.Markdown("Upload a snapshot of a digital weight display or use webcam. The app extracts weight using OCR.")

    with gr.Row():
        webcam = gr.Image(source="webcam", type="pil", label="📸 Capture from Webcam")
        upload = gr.Image(source="upload", type="pil", label="📁 Or Upload Image")

    image_input = gr.State()

    def choose_image(w, u):
        return w if w else u

    webcam.change(fn=choose_image, inputs=[webcam, upload], outputs=image_input)
    upload.change(fn=choose_image, inputs=[webcam, upload], outputs=image_input)

    submit_btn = gr.Button("🚀 Detect Weight")
    weight_out = gr.Textbox(label="Detected Weight")
    time_out = gr.Textbox(label="Captured At (IST)")
    snapshot_out = gr.Image(label="Snapshot")

    submit_btn.click(fn=process_image, inputs=image_input, outputs=[weight_out, time_out, snapshot_out])

demo.launch()