app.py

import gradio as gr
import csv
import random
import datetime
import os

csv_filename = "shipping_data.csv"

# Sample data
shipper_names = ["Global Express", "Fast Ship Logistics", "Secure Courier"]
cities_states = [("New York", "NY"), ("Los Angeles", "CA"), ("Chicago", "IL"), ("Houston", "TX"), ("Miami", "FL")]
shipping_methods = ["FedEx", "UPS", "DHL", "USPS"]
weight_range = (0.5, 50)  # Min and max weight in kg

def random_phone():
    return f"+1-{random.randint(200, 999)}-{random.randint(100, 999)}-{random.randint(1000, 9999)}"

def generate_tracking(carrier):
    prefix = {"FedEx": "FDX", "UPS": "UPS", "DHL": "DHL", "USPS": "USPS"}.get(carrier, "TRK")
    return f"{prefix}-{random.randint(100000, 999999)}"

def generate_csv():
    try:
        shipping_data = []
        for order_id in range(1001, 1011):
            order_date = datetime.datetime.now() - datetime.timedelta(days=random.randint(1, 30))
            delivery_date = order_date + datetime.timedelta(days=random.randint(2, 10))

            shipper = random.choice(shipper_names)
            shipper_city, shipper_state = random.choice(cities_states)
            receiver_city, receiver_state = random.choice(cities_states)

            shipping_method = random.choice(shipping_methods)
            weight = round(random.uniform(*weight_range), 2)
            tracking_number = generate_tracking(shipping_method)

            shipping_data.append([
                order_id,
                order_date.strftime("%Y-%m-%d %H:%M:%S"),
                shipper,
                f"{random.randint(100, 999)} {shipper_city} St, {shipper_city}, {shipper_state}",
                random_phone(),
                f"Customer {order_id}",
                f"{random.randint(100, 999)} {receiver_city} Ave, {receiver_city}, {receiver_state}",
                random_phone(),
                weight,
                shipping_method,
                tracking_number,
                delivery_date.strftime("%Y-%m-%d"),
            ])

        csv_columns = ["Order ID", "Order Date", "Shipper Name", "Shipper Address", "Shipper Phone", 
                       "Receiver Name", "Receiver Address", "Receiver Phone", "Package Weight (kg)", 
                       "Shipping Method", "Tracking Number", "Estimated Delivery Date"]

        with open(csv_filename, mode="w", newline="") as file:
            writer = csv.writer(file)
            writer.writerow(csv_columns)
            writer.writerows(shipping_data)

        print("✅ CSV file generated successfully!")
        return csv_filename

    except Exception as e:
        print(f"❌ Error generating CSV: {e}")
        return None

def download_csv():
    file_path = generate_csv()
    if file_path and os.path.exists(file_path):
        return file_path
    return "Error: CSV file not found."

# Gradio UI
with gr.Blocks() as demo:
    gr.Markdown("# 📦 Shipping CSV Generator")
    gr.Markdown("Click the button below to generate and download a CSV file.")
    btn = gr.Button("Generate CSV")
    output = gr.File(label="Download your CSV", type="filepath")  # FIXED: Changed 'file' to 'filepath'
    btn.click(fn=download_csv, outputs=output)

if __name__ == "__main__":
    demo.launch()