# Copyright (C) 2026 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
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"""Unittests for the subcmds/rebase.py module."""

import contextlib
import io
from types import SimpleNamespace
from unittest import mock

from error import GitError
from subcmds import rebase


def test_resolve_onto_manifest_success() -> None:
    """Test _ResolveOntoManifest when ToLocal succeeds."""
    project = mock.MagicMock()
    project.revisionExpr = "main"

    remote = mock.MagicMock()
    remote.ToLocal.return_value = "refs/remotes/goog/main"
    project.GetRemote.return_value = remote

    res = rebase._ResolveOntoManifest(project)
    assert res == "refs/remotes/goog/main"
    project.GetRemote.assert_called_once()
    remote.ToLocal.assert_called_once_with("main")


def test_resolve_onto_manifest_fallback() -> None:
    """Test _ResolveOntoManifest when ToLocal raises GitError."""
    project = mock.MagicMock()
    project.revisionExpr = "main"

    remote = mock.MagicMock()
    remote.ToLocal.side_effect = GitError("Failed to resolve")
    project.GetRemote.return_value = remote

    res = rebase._ResolveOntoManifest(project)
    assert res == "main"
    project.GetRemote.assert_called_once()
    remote.ToLocal.assert_called_once_with("main")


def test_execute_delegates_autostash_to_rebase() -> None:
    """--auto-stash is one rebase process, including staged-only changes."""
    cmd = rebase.Rebase()
    cmd.manifest = mock.MagicMock()
    cmd.git_event_log = mock.MagicMock()
    project = mock.MagicMock()
    project.CurrentBranch = "topic"
    project.RelPath.return_value = "project"
    branch = mock.MagicMock()
    branch.LocalMerge = "refs/remotes/origin/main"
    project.GetBranch.return_value = branch
    cmd.GetProjects = mock.MagicMock(return_value=[project])
    opt = SimpleNamespace(
        interactive=False,
        fail_fast=False,
        whitespace=None,
        quiet=False,
        force_rebase=False,
        ff=True,
        autosquash=False,
        auto_stash=True,
        onto_manifest=False,
        this_manifest_only=False,
    )
    git_command = mock.MagicMock()
    git_command.Wait.return_value = 0

    with mock.patch.object(
        rebase, "GitCommand", return_value=git_command
    ) as run_git, contextlib.redirect_stdout(io.StringIO()):
        assert cmd.Execute(opt, []) == 0

    run_git.assert_called_once_with(
        project,
        ["rebase", "--autostash", "refs/remotes/origin/main"],
    )