import os
import tempfile
import uuid
from auth import login_required
import boto3
from botocore.exceptions import BotoCoreError, ClientError
from starlette.applications import Starlette
from starlette.responses import JSONResponse
from starlette.routing import Route
from starlette.requests import Request


STORJ_ACCESS_KEY = os.environ.get('STORJ_ACCESS_KEY')
STORJ_SECRET_KEY = os.environ.get('STORJ_SECRET_KEY')
STORJ_END_POINT = os.environ.get('STORJ_END_POINT')
STORJ_BUCKET_NAME = os.environ.get('STORJ_BUCKET_NAME')
CDN_DOMAIN = os.environ.get('CDN_DOMAIN')


@login_required
async def upload_handler(request: Request):
    form = await request.form()
    file = form.get('file')

    if file is None:
        return JSONResponse({'error': 'No file uploaded'}, status_code=400)

    file_name, file_extension = os.path.splitext(file.filename)
    key = str(uuid.uuid4()) + file_extension

    s3 = boto3.client('s3',
                      aws_access_key_id=STORJ_ACCESS_KEY,
                      aws_secret_access_key=STORJ_SECRET_KEY,
                      endpoint_url=STORJ_END_POINT)

    try:
        with tempfile.NamedTemporaryFile() as tmp_file:
            while True:
                chunk = await file.read(8192)  # 8192 bytes by default.
                if not chunk:
                    break
                tmp_file.write(chunk)

            s3.upload_file(
                Filename=tmp_file.name,
                Bucket=STORJ_BUCKET_NAME,
                Key=key,
                ExtraArgs={
                    "ContentType": file.content_type
                }
            )

        url = 'http://' + CDN_DOMAIN + '/' + key

        return JSONResponse({'url': url, 'originalFilename': file.filename})

    except (BotoCoreError, ClientError) as e:
        print(e)
        return JSONResponse({'error': 'Failed to upload file'}, status_code=500)

routes = [
    Route('/', upload_handler, methods=['POST']),
]

app = Starlette(debug=True, routes=routes)

if __name__ == "__main__":
    import uvicorn
    uvicorn.run(app, host='0.0.0.0', port=8080)