# Copyright 2022 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.
"""Generic continuous integration recipe for projects in the Fuchsia ecosystem.

This recipe supports projects that need the following steps in their CI jobs:

1. Checkout code.
2. Download additional pinned dependencies not checked into version control.
   Note that this additional download step will be subject to removal once it
   can be handled by Git itself, per
   http://go/git-superproject-source-control-for-fuchsia.
3. Build.
4. Upload build artifacts (images, blobs, drivers, etc.).
5. TODO(olivernewman): Run tests in parallel shards on separate machines.
6. TODO(fxbug.dev/93038): Trigger tests in downstream projects, passing through
   the uploaded build artifacts.
"""

from google.protobuf import json_format as jsonpb

from PB.recipes.fuchsia.build_test_upload import InputProperties

PYTHON_VERSION_COMPATIBILITY = "PY3"

DEPS = [
    "fuchsia/buildbucket_util",
    "fuchsia/checkout",
    "fuchsia/dpi",
    "fuchsia/fxt",
    "fuchsia/git",
    "recipe_engine/context",
    "recipe_engine/path",
    "recipe_engine/properties",
    "recipe_engine/step",
]

PROPERTIES = InputProperties


def RunSteps(api, props):
    # Projects should not assume they'll always be checked out at the same
    # absolute path, so do the checkout in a random temporary directory.
    checkout_dir = api.path.mkdtemp("checkout")

    if props.jiri_manifest:
        api.checkout.with_options(
            path=checkout_dir,
            manifest=props.jiri_manifest,
            remote=props.remote,
            project=props.jiri_project,
        )
    else:
        api.git.checkout_from_build_input(
            repo=props.remote,
            path=checkout_dir,
        )

    # Compute a semantic version that a project can use as a placeholder value
    # for operations that require a version number, if the project does not have
    # a formal release process.
    #
    # NOTE: This assumes that the repo at the checkout root is the source of
    # truth for the entire checkout, which may not be the case for some
    # Jiri-based checkouts where the source of truth is a nested repository.
    with api.context(cwd=checkout_dir):
        revision_count = api.git.rev_list_count("HEAD", test_data="1")
        placeholder_version = "0.0.0.%s" % revision_count

    upload_namespace = api.buildbucket_util.id

    # Any of these variables can be used as a format string in a command's
    # configured arguments and it will be substituted for the actual value. For
    # example, "--build-dir={build_dir}" in a command's args will be
    # replaced with "--build-dir=/actual/path/to/build/dir".
    #
    # Where possible, this approach is preferred over requiring commands to
    # support specific flags as it lets each project's commands be fairly
    # infrastructure-agnostic and reduces coupling between the project and the
    # infrastructure.
    build_dir = api.path.mkdtemp("build")
    variables = {
        "build_dir": build_dir,
        "upload_namespace": upload_namespace,
        "placeholder_version": placeholder_version,
    }

    def run_command(step_name, command_pb):
        # Not all projects need all possible commands, so skip any un-configured
        # commands.
        if not command_pb.path:
            return None
        cmd = [checkout_dir.join(*command_pb.path.split("/"))]
        for arg in command_pb.args:
            # Perform variable substitutions.
            cmd.append(arg.format(**variables))
        return api.step(step_name, cmd)

    with api.context(cwd=checkout_dir):
        run_command("download extra dependencies", props.download_command)

        run_command("build", props.build_command)

        # TODO(fxbug.dev/92697): Each upload command should emit a manifest of
        # files for the recipe to upload, rather than doing the upload itself.
        run_command("upload", props.upload_command)

    if props.mos_upload_options.repo_hostname:
        api.dpi.upload(
            "upload to MOS-TUF repos",
            build_dir=build_dir,
            options=props.mos_upload_options,
        )

    if props.gcs_bucket and props.HasField("fxt_options"):
        api.fxt.orchestrate_fxt_tests(
            bucket=props.gcs_bucket,
            namespace=upload_namespace,
            options=props.fxt_options,
        )


def GenTests(api):
    default_remote = "https://fuchsia.googlesource.com/foo"

    def properties(**kwargs):
        props = {
            "remote": default_remote,
            "build_command": {
                "path": "scripts/build.sh",
                "args": [
                    "--build-dir",
                    "{build_dir}",
                    "--version",
                    "{placeholder_version}",
                ],
            },
            "upload_command": {
                "path": "scripts/upload.sh",
                "args": ["--namespace", "{upload_namespace}"],
            },
        }
        props.update(kwargs)
        return api.properties(jsonpb.ParseDict(props, InputProperties()))

    yield (
        api.buildbucket_util.test("fxt_tests", git_repo=default_remote)
        + properties(
            gcs_bucket="foo-artifacts",
            fxt_options={"image_name": "image-name"},
        )
        + api.fxt.orchestrate_fxt_tests()
    )

    yield (
        api.buildbucket_util.test("jiri_with_mos_upload", git_repo=default_remote)
        + properties(
            jiri_manifest="path/to/manifest",
            download_command={"path": "scripts/download_deps.sh"},
            mos_upload_options={
                "repo_hostname": "test.fuchsia-update.googleusercontent.com",
                "gcs_bucket": "discover-cloud.appspot.com",
                "manifest_path": "path/to/mos/manifest",
            },
        )
    )