import os
import boto3
from botocore.exceptions import ClientError

from config import AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, BUCKET_NAME, S3_OBJ_BASE_URL


class S3Handler:

    def __init__(self):
        """
        Establishes connection with the required s3 bucket
        """
        try:
            self.s3 = boto3.client(
                's3',
                aws_access_key_id=AWS_ACCESS_KEY_ID,
                aws_secret_access_key=AWS_SECRET_ACCESS_KEY
            )
        except ClientError as e:
            print(f"Failed to connect to S3: {e}")

    def upload_file(self, user_id, s3_path, file_path, **kwargs):
        """
        Uploads file to the s3
        """
        
        try:
            # Filename: File path to upload
            # Bucket: Name of the bucket to upload the file.
            # Key: Name of the key to upload to S3.
            s3_user_path = user_id + '/' + s3_path
            self.s3.upload_file( 
                Filename=file_path, 
                Bucket=BUCKET_NAME, 
                Key=s3_user_path,
                # ExtraArgs={'ACL': 'public-read'}
            )
            print(f"File uploaded to {BUCKET_NAME} as {s3_path}")

            s3_obj_path = S3_OBJ_BASE_URL + '/' + s3_user_path
            return s3_obj_path
        except ClientError as e:
            print(f"Failed to upload file to S3: {e}")

    def download_file(self, user_id, s3_path, file_path, **kwargs):
        """
        Downloads file from s3
        """
        
        try:
            # Filename: Local File path to download to
            # Bucket:  Name of the bucket to download the file from
            # Key: Name of the file to download from the bucket
            s3_user_path = user_id + '/' + s3_path
            self.s3.download_file( 
                Filename=file_path, 
                Bucket=BUCKET_NAME, 
                Key=s3_user_path
            )
            print(f"File downloaded from {BUCKET_NAME} as {file_path}")
            
            s3_obj_path = S3_OBJ_BASE_URL + '/' + s3_user_path
            return s3_obj_path
        except ClientError as e:
            print(f"Failed to download file from S3: {e}")


# s3_path = "sample_video_srt_2.mp4"
# file_path = "Output/video_1.mp4"

# s3 = S3Handler()
# s3.upload_file(s3_path, file_path, user_id="uzair")