import boto3
from botocore.exceptions import ClientError

import logging

from desktop_env.providers.base import Provider
from datetime import datetime
import time


logger = logging.getLogger("desktopenv.providers.aws.AWSProvider")
logger.setLevel(logging.INFO)

WAIT_DELAY = 15
MAX_ATTEMPTS = 10


class AWSProvider(Provider):


    def start_emulator(self, path_to_vm: str, headless: bool, *args, **kwargs):
        logger.info("Starting AWS VM...")
        ec2_client = boto3.client('ec2', region_name=self.region)

        try:
            # Check the current state of the instance
            response = ec2_client.describe_instances(InstanceIds=[path_to_vm])
            state = response['Reservations'][0]['Instances'][0]['State']['Name']
            logger.info(f"Instance {path_to_vm} current state: {state}")

            if state == 'running':
                # If the instance is already running, skip starting it
                logger.info(f"Instance {path_to_vm} is already running. Skipping start.")
                return

            if state == 'stopped':
                # Start the instance if it's currently stopped
                ec2_client.start_instances(InstanceIds=[path_to_vm])
                logger.info(f"Instance {path_to_vm} is starting...")

                # Wait until the instance reaches 'running' state
                waiter = ec2_client.get_waiter('instance_running')
                waiter.wait(
                    InstanceIds=[path_to_vm],
                    WaiterConfig={'Delay': WAIT_DELAY, 'MaxAttempts': MAX_ATTEMPTS}
                )
                logger.info(f"Instance {path_to_vm} is now running.")
            else:
                # For all other states (terminated, pending, etc.), log a warning
                logger.warning(f"Instance {path_to_vm} is in state '{state}' and cannot be started.")

        except ClientError as e:
            logger.error(f"Failed to start the AWS VM {path_to_vm}: {str(e)}")
            raise


    def get_ip_address(self, path_to_vm: str) -> str:
        logger.info("Getting AWS VM IP address...")
        ec2_client = boto3.client('ec2', region_name=self.region)

        try:
            response = ec2_client.describe_instances(InstanceIds=[path_to_vm])
            for reservation in response['Reservations']:
                for instance in reservation['Instances']:
                    private_ip_address = instance.get('PrivateIpAddress', '')
                    public_ip_address = instance.get('PublicIpAddress', '')
                    
                    if public_ip_address:
                        vnc_url = f"http://{public_ip_address}:5910/vnc.html"
                        logger.info("="*80)
                        logger.info(f"🖥️  VNC Web Access URL: {vnc_url}")
                        logger.info(f"📡 Public IP: {public_ip_address}")
                        logger.info(f"🏠 Private IP: {private_ip_address}")
                        logger.info("="*80)
                        print(f"\n🌐 VNC Web Access URL: {vnc_url}")
                        print(f"📍 Please open the above address in the browser for remote desktop access\n")
                    else:
                        logger.warning("No public IP address available for VNC access")
                    
                    return private_ip_address
            return ''  # Return an empty string if no IP address is found
        except ClientError as e:
            logger.error(f"Failed to retrieve IP address for the instance {path_to_vm}: {str(e)}")
            raise

    def save_state(self, path_to_vm: str, snapshot_name: str):
        logger.info("Saving AWS VM state...")
        ec2_client = boto3.client('ec2', region_name=self.region)

        try:
            image_response = ec2_client.create_image(InstanceId=path_to_vm, Name=snapshot_name)
            image_id = image_response['ImageId']
            logger.info(f"AMI {image_id} created successfully from instance {path_to_vm}.")
            return image_id
        except ClientError as e:
            logger.error(f"Failed to create AMI from the instance {path_to_vm}: {str(e)}")
            raise

    def revert_to_snapshot(self, path_to_vm: str, snapshot_name: str):
        logger.info(f"Reverting AWS VM to snapshot AMI: {snapshot_name}...")
        ec2_client = boto3.client('ec2', region_name=self.region)

        try:
            # Step 1: Retrieve the original instance details
            instance_details = ec2_client.describe_instances(InstanceIds=[path_to_vm])
            instance = instance_details['Reservations'][0]['Instances'][0]
            security_groups = [sg['GroupId'] for sg in instance['SecurityGroups']]
            subnet_id = instance['SubnetId']
            instance_type = instance['InstanceType']
            
            # Step 2: Terminate the old instance
            ec2_client.terminate_instances(InstanceIds=[path_to_vm])
            logger.info(f"Old instance {path_to_vm} has been terminated.")

            # Step 3: Launch a new instance from the snapshot(AMI) with performance optimization
            logger.info(f"Launching a new instance from AMI {snapshot_name}...")
            
            run_instances_params = {
                "MaxCount": 1,
                "MinCount": 1,
                "ImageId": snapshot_name,
                "InstanceType": instance_type,
                "EbsOptimized": True,
                "NetworkInterfaces": [
                    {
                        "SubnetId": subnet_id,
                        "AssociatePublicIpAddress": True,
                        "DeviceIndex": 0,
                        "Groups": security_groups
                    }
                ],
                "BlockDeviceMappings": [
                    {
                        "DeviceName": "/dev/sda1", 
                        "Ebs": {
                            # "VolumeInitializationRate": 300
                            "VolumeSize": 30,  # Size in GB
                            "VolumeType": "gp3",  # General Purpose SSD
                            "Throughput": 1000,
                            "Iops": 4000  # Adjust IOPS as needed
                        }
                    }
                ]
            }
            
            new_instance = ec2_client.run_instances(**run_instances_params)
            new_instance_id = new_instance['Instances'][0]['InstanceId']
            logger.info(f"New instance {new_instance_id} launched from AMI {snapshot_name}.")
            logger.info(f"Waiting for instance {new_instance_id} to be running...")
            ec2_client.get_waiter('instance_running').wait(InstanceIds=[new_instance_id])

            logger.info(f"Instance {new_instance_id} is ready.")
            
            try:
                instance_details = ec2_client.describe_instances(InstanceIds=[new_instance_id])
                instance = instance_details['Reservations'][0]['Instances'][0]
                public_ip = instance.get('PublicIpAddress', '')
                if public_ip:
                    vnc_url = f"http://{public_ip}:5910/vnc.html"
                    logger.info("="*80)
                    logger.info(f"🖥️  New Instance VNC Web Access URL: {vnc_url}")
                    logger.info(f"📡 Public IP: {public_ip}")
                    logger.info(f"🆔 New Instance ID: {new_instance_id}")
                    logger.info("="*80)
                    print(f"\n🌐 New Instance VNC Web Access URL: {vnc_url}")
                    print(f"📍 Please open the above address in the browser for remote desktop access\n")
            except Exception as e:
                logger.warning(f"Failed to get VNC address for new instance {new_instance_id}: {e}")

            return new_instance_id

        except ClientError as e:
            logger.error(f"Failed to revert to snapshot {snapshot_name} for the instance {path_to_vm}: {str(e)}")
            raise


    def stop_emulator(self, path_to_vm, region=None):
        logger.info(f"Stopping AWS VM {path_to_vm}...")
        ec2_client = boto3.client('ec2', region_name=self.region)

        try:
            ec2_client.terminate_instances(InstanceIds=[path_to_vm])
            logger.info(f"Instance {path_to_vm} has been terminated.")
        except ClientError as e:
            logger.error(f"Failed to stop the AWS VM {path_to_vm}: {str(e)}")
            raise
