import os
import json
import shutil
import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
import asyncio
import aiofiles
import aiosmtplib
from agent_monitor.monitor import analyze_agent_steps, AsyncOpenAIClient

async def check_and_process_uploads():
    upload_dir =  "evals_upload"
    processed_dir = "evals_processed"
    live_dir = "evals_live"
    
    new_uploads = [f for f in os.listdir(upload_dir) if f.endswith('.json')]
    
    if not new_uploads:
        print("No new uploads found.")
        return
    
    # check for all new uploads whether they are already in live or processed directory
    # Also check whether the files are actually identical
    unprocessed_uploads = []
    for upload in new_uploads:
        upload_path = os.path.join(upload_dir, upload)
        processed_path = os.path.join(processed_dir, upload)
        live_path = os.path.join(live_dir, upload)
        
        if not os.path.exists(live_path) and not os.path.exists(processed_path):
            unprocessed_uploads.append(upload)
        elif os.path.exists(processed_path):
            with open(upload_path, 'r') as f:
                new_data = json.load(f)
            
            with open(processed_path, 'r') as f:
                processed_data = json.load(f)
            
            # TODO we can use a better comparison method with exact comparison
            # if new_data != processed_data:
            #     unprocessed_uploads.append(upload)
            print(f"Upload {upload} is already in processed directory.")
        elif os.path.exists(live_path):
            with open(upload_path, 'r') as f:
                new_data = json.load(f)
            
            with open(live_path, 'r') as f:
                live_data = json.load(f)
            
            # if new_data != live_data:
            #     unprocessed_uploads.append(upload)
            print(f"Upload {upload} is already in live directory.")
        else:
            unprocessed_uploads.append(upload)

    print(f"Processing {len(unprocessed_uploads)} new uploads.")
    tasks = []
    for upload in unprocessed_uploads:
        upload_path = os.path.join(upload_dir, upload)
        processed_path = os.path.join(processed_dir, upload)
        tasks.append(process_single_upload(upload_path, processed_path))
    
    await asyncio.gather(*tasks)


async def process_single_upload(upload_path, processed_path):
    # Check the structure of the upload
    check_result = await check_upload_structure(upload_path)
    
    if check_result['is_valid']:
        # Process the file
        await process_upload(upload_path, processed_path)
        
        # Move the file to processed directory
        # await asyncio.to_thread(shutil.move, upload_path, processed_path)
        
        # Send email notification
        # await send_email_notification(upload_path.name, check_result, "Processing successful")
    else:
        print(f"Upload check failed for {upload_path}: {check_result['message']}")
        # Send email notification about the failed check
        # await send_email_notification(upload_path.name, check_result, "Upload check failed")
        
        
async def check_upload_structure(file_path):
    try:
        async with aiofiles.open(file_path, 'r') as f:
            data = json.loads(await f.read())
        
        # Check for required keys
        required_keys = ['config', 'results', 'raw_eval_results', 'raw_logging_results']
        missing_keys = [key for key in required_keys if key not in data]
        
        if missing_keys:
            return {'is_valid': False, 'message': f"Missing required keys: {', '.join(missing_keys)}"}
        
        # Check for specific structure in raw_logging_results
        if not isinstance(data['raw_logging_results'], list):
            return {'is_valid': False, 'message': "raw_logging_results should be a list"}
        
        for item in data['raw_logging_results']:
            if not all(key in item for key in ['weave_task_id', 'inputs', 'outputs']):
                return {'is_valid': False, 'message': "Each item in raw_logging_results should have weave_task_id, inputs, and outputs"}
        
        return {'is_valid': True, 'message': "File structure is valid"}

    except json.JSONDecodeError:
        return {'is_valid': False, 'message': "Invalid JSON format"}
    except Exception as e:
        return {'is_valid': False, 'message': f"Unexpected error: {str(e)}"}
    

async def process_upload(input_path, output_path):
    print(f"Processing {input_path}...")
    # load the file
    with open(input_path, 'r') as f:
        data = json.loads(f.read())

    assert 'raw_logging_results' in data, "raw_logging_results key not found in the file"
    openai_client = AsyncOpenAIClient(model="gpt-4o-mini")

    processed_calls = await analyze_agent_steps(data['raw_logging_results'][:2], openai_client)

    # Save the processed data
    data['raw_logging_results'] = processed_calls

    with open(output_path, 'w') as f:
        json.dump(data, f, indent=4)

    print(f"Processing of {input_path} successful. Results saved to {output_path}")

async def send_email_notification(filename, check_result, status):
    sender_email = "your_email@example.com"
    receiver_email = "receiver@example.com"
    password = "your_password"

    message = MIMEMultipart()
    message["From"] = sender_email
    message["To"] = receiver_email
    message["Subject"] = f"Upload Processing Notification: {filename}"

    body = f"""
    File: {filename}
    Status: {status}
    Check Result: {check_result['message']}
    """

    message.attach(MIMEText(body, "plain"))

    await aiosmtplib.send(
        message,
        hostname="smtp.gmail.com",
        port=465,
        use_tls=True,
        username=sender_email,
        password=password
    )