import os
import tempfile
import uuid
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
from auth import check_auth


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')


@check_auth
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)

async def home(request: Request):
    return JSONResponse({'message': 'Hello World!'})

routes = [
    Route('/', home, methods=['GET'])
]

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

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