app.py

import os
import streamlit as st
from azure.cosmos import CosmosClient, PartitionKey
from azure.storage.blob import BlobServiceClient
from azure.cosmos.exceptions import CosmosResourceNotFoundError

import requests
import glob

# Environment Variables
COSMOS_CONNECTION_STRING = os.getenv('COSMOS_CONNECTION_STRING')
BLOB_STORAGE_CONNECTION_STRING = os.getenv('BLOB_STORAGE_CONNECTION_STRING')

# Initialize Azure Cosmos DB Client
cosmos_client = CosmosClient.from_connection_string(COSMOS_CONNECTION_STRING)

# Initialize Azure Blob Storage Client
blob_service = BlobServiceClient.from_connection_string(BLOB_STORAGE_CONNECTION_STRING)

# Function to Retrieve and Display Cosmos DB Structure
def display_cosmos_db_structure():
    st.subheader('Azure Cosmos DB Structure')
    db_properties = next(cosmos_client.list_databases(), None)
    if db_properties:
        db_name = db_properties['id']
        st.markdown(f"#### Database: {db_name}")
        database_client = cosmos_client.get_database_client(db_name)
        container_properties = next(database_client.list_containers(), None)
        if container_properties:
            container_name = container_properties['id']
            st.markdown(f"- **Container**: {container_name}")
            container_client = database_client.get_container_client(container_name)
            items = list(container_client.read_all_items())
            for item in items:
                item_desc = f"  - Item: `{item['id']}`"
                if 'file_name' in item and item['file_name'].endswith('.png'):
                    st.markdown(item_desc)
                    st.image(item['file_name'])
                else:
                    st.markdown(item_desc)

# Button to Trigger Display of Cosmos DB Structure
if st.button('Show Cosmos DB Structure'):
    display_cosmos_db_structure()

# Function to Add or Update PNG Images
def add_or_update_png_images():
    db_properties = next(cosmos_client.list_databases(), None)
    if db_properties:
        db_name = db_properties['id']
        database_client = cosmos_client.get_database_client(db_name)
        container_properties = next(database_client.list_containers(), None)
        if container_properties:
            container_name = container_properties['id']
            container_client = database_client.get_container_client(container_name)
            existing_items = list(container_client.read_all_items())
            existing_ids = {item['id'] for item in existing_items}

            # Add or update PNG files from directory
            png_files = glob.glob('*.png')
            for file_name in png_files:
                item_id = os.path.splitext(file_name)[0]
                item_data = {"id": item_id, "file_name": file_name}
            
                if item_id not in existing_ids:
                    container_client.create_item(body=item_data)
                    st.write(f"Added Item: {item_id}")
                else:
                    delete_button = st.button(f"🗑️ Delete {item_id}", key=f"delete_{item_id}")
                    if delete_button:
                        # Attempt to delete the item
                        try:
                            container_client.delete_item(item=item_id, partition_key=item_id)
                            # Verify deletion by trying to read the deleted item
                            try:
                                container_client.read_item(item=item_id, partition_key=item_id)
                                st.error(f"Failed to delete Item: {item_id}")
                            except CosmosResourceNotFoundError:
                                st.success(f"Successfully deleted Item: {item_id}")
                        except Exception as e:
                            st.error(f"Error deleting Item: {item_id}. Error: {str(e)}")
            
                    st.write(f"Item already exists: {item_id}")

# UI to Add or Update PNG Images
if st.button('Manage PNG Images'):
    add_or_update_png_images()

# Azure Blob Storage - Upload/Download
st.subheader('Azure Blob Storage - Upload/Download')
blob_container = st.text_input('Blob Container')
blob_file = st.file_uploader('Upload file to Blob')

if blob_file is not None and st.button('Upload to Blob'):
    blob_client = blob_service.get_blob_client(container=blob_container, blob=blob_file.name)
    blob_client.upload_blob(blob_file.getvalue())

# Azure Functions - Trigger
st.subheader('Azure Functions - Trigger')
function_url = st.text_input('Function URL')

if st.button('Call Azure Function'):
    response = requests.get(function_url)
    st.write('Function Response:', response.text)