#!/usr/bin/env python
# Copyright 2023 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import argparse
import dataclasses
import enum
import json
import os
import re
import sys
import urllib.request

_URL = (
    "https://github.com/project-chip/zap/releases/download/{version}/zap-{platform}.zip"
)


class ZapVersion(enum.Enum):
    RELEASE = 1
    PRERELEASE = 2


# Which zap version to consider "latest".
_ZAP_VERSION = ZapVersion.PRERELEASE


def do_latest():
    """Retrieve current version.
    """
    if _ZAP_VERSION == ZapVersion.RELEASE:
        print(
            json.load(
                urllib.request.urlopen(
                    "https://api.github.com/repos/project-chip/zap/releases/latest"
                )
            )["tag_name"]
        )
        return
    if _ZAP_VERSION == ZapVersion.PRERELEASE:
        tags = json.load(
            urllib.request.urlopen("https://api.github.com/repos/project-chip/zap/tags")
        )
        assert len(tags) > 0, "Empty tags list"
        # Tags look like "v2023.01.17-nightly", so sorting them will produce a
        # chronological ordering.
        sorted_tag_names = sorted(t["name"] for t in tags)
        print(sorted_tag_names[-1])


def get_download_url(version, platform):
    """Get URL of the given version and platform."""

    platform_name = {
        "linux-amd64": "linux-x64",
        "linux-arm64": "linux-arm64",
        "mac-amd64": "mac-x64",
        "mac-arm64": "mac-arm64",
        "windows-amd64": "win-x64",
    }[platform]

    url = _URL.format(version=version, platform=platform_name)

    manifest = {"url": [url], "ext": ".zip"}
    print(json.dumps(manifest))


def main():
    ap = argparse.ArgumentParser()
    sub = ap.add_subparsers()

    latest = sub.add_parser("latest")
    latest.set_defaults(func=lambda _opts: do_latest())

    download = sub.add_parser("get_url")
    download.set_defaults(
        func=lambda opts: get_download_url(
            os.environ["_3PP_VERSION"], os.environ["_3PP_PLATFORM"]
        )
    )

    opts = ap.parse_args()
    return opts.func(opts)


if __name__ == "__main__":
    sys.exit(main())