import uuid
from datetime import datetime, timezone
from pathlib import PurePosixPath

import boto3
from botocore.config import Config as BotoConfig

from app.config import settings


def _get_client():
    return boto3.client(
        "s3",
        endpoint_url=settings.minio.endpoint,
        aws_access_key_id=settings.minio.access_key,
        aws_secret_access_key=settings.minio.secret_key,
        config=BotoConfig(signature_version="s3v4"),
    )


def _generate_object_key(filename: str) -> str:
    now = datetime.now(timezone.utc)
    date_prefix = now.strftime("%Y/%m/%d")
    ext = PurePosixPath(filename).suffix or ".jpg"
    return f"{date_prefix}/{uuid.uuid4().hex}{ext}"


def upload_image(file_bytes: bytes, original_filename: str) -> str:
    client = _get_client()
    object_key = _generate_object_key(original_filename)
    content_type = "image/jpeg"
    if original_filename.lower().endswith(".png"):
        content_type = "image/png"

    client.put_object(
        Bucket=settings.minio.bucket,
        Key=object_key,
        Body=file_bytes,
        ContentType=content_type,
    )
    return object_key


def generate_presigned_put_url(object_key: str) -> str:
    client = _get_client()
    url: str = client.generate_presigned_url(
        "put_object",
        Params={
            "Bucket": settings.minio.bucket,
            "Key": object_key,
        },
        ExpiresIn=300,
    )
    # Replace internal endpoint with public endpoint
    if settings.minio.public_endpoint:
        from urllib.parse import urlparse, urlunparse

        internal = urlparse(settings.minio.endpoint)
        public = urlparse(settings.minio.public_endpoint)
        url = url.replace(f"{internal.scheme}://{internal.netloc}", f"{public.scheme}://{public.netloc}", 1)
    return url