# Copyright Materialize, Inc. and contributors. All rights reserved.
#
# Use of this software is governed by the Business Source License
# included in the LICENSE file at the root of this repository.
#
# As of the Change Date specified in that file, in accordance with
# the Business Source License, use of this software will be governed
# by the Apache License, Version 2.0.

# This file contains a class that can be used to upload a tarball to the materialize-binaries S3 bucket.

import os
import tarfile
import tempfile
import time
from pathlib import Path

import boto3
import humanize

from materialize import git
from materialize.mz_version import TypedVersionBase

BINARIES_BUCKET = "materialize-binaries"


class TarballUploader:
    def __init__(self, package_name: str, version: TypedVersionBase):
        self.package_name = package_name
        self.version = version
        self.version_str = f"v{version.str_without_prefix()}"

    def _create_tardir(self, name: str) -> tarfile.TarInfo:
        """Takes a dir path and creates a TarInfo. Sets the
        modification time, mode, and type of the dir."""
        d = tarfile.TarInfo(name)
        d.mtime = int(time.time())
        d.mode = 0o40755
        d.type = tarfile.DIRTYPE
        return d

    def _sanitize_tarinfo(self, tarinfo: tarfile.TarInfo) -> tarfile.TarInfo:
        tarinfo.uid = tarinfo.gid = 0
        tarinfo.uname = tarinfo.gname = "root"
        return tarinfo

    def _upload_redirect(self, key: str, to: str) -> None:
        with tempfile.NamedTemporaryFile() as empty:
            boto3.client("s3").upload_fileobj(
                Fileobj=empty,
                Bucket=BINARIES_BUCKET,
                Key=key,
                ExtraArgs={"WebsiteRedirectLocation": to},
            )

    def _upload_tarball(self, tarball: Path, platform: str) -> None:
        """Uploads the tarball (.tar) to the S3 bucket."""
        s3_object = f"{self.package_name}-{self.version_str}-{platform}.tar.gz"
        boto3.client("s3").upload_file(
            Filename=str(tarball),
            Bucket=BINARIES_BUCKET,
            Key=s3_object,
        )
        if "aarch64" in platform:
            self._upload_redirect(
                f"{self.package_name}-{self.version_str}-{platform.replace('aarch64', 'arm64')}.tar.gz",
                f"/{s3_object}",
            )

    def _upload_latest_redirect(self, platform: str) -> None:
        """Uploads an S3 object for the latest version redirect."""
        self._upload_redirect(
            f"{self.package_name}-latest-{platform}.tar.gz",
            f"/{self.package_name}-{self.version_str}-{platform}.tar.gz",
        )
        if "aarch64" in platform:
            self._upload_latest_redirect(platform.replace("aarch64", "arm64"))

    def deploy_tarball(self, platform: str, binary_path: Path) -> None:
        """Creates and uploads a tarball containing the binary."""
        tar_path = Path(f"{self.package_name}-{platform}.tar.gz")
        with tarfile.open(str(tar_path), "x:gz") as f:
            f.addfile(self._create_tardir("mz/bin"))
            f.add(
                str(binary_path),
                arcname=f"mz/bin/{binary_path.name}",
                filter=self._sanitize_tarinfo,
            )

        size = humanize.naturalsize(os.lstat(tar_path).st_size)
        print(f"Tarball size: {size}")

        self._upload_tarball(tar_path, platform)
        self._upload_latest_redirect(platform)


def is_latest_version(version: TypedVersionBase) -> bool:
    latest_version = max(
        t
        for t in git.get_version_tags(version_type=type(version))
        if t.prerelease is None
    )
    return version == latest_version