# Copyright 2026 Google LLC
#
# 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,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

"""Tests for utilities in cli_create."""

from __future__ import annotations

import os
from pathlib import Path
import subprocess
from typing import Any
from typing import Dict
from typing import List
from typing import Tuple

import click
import google.adk.cli.cli_create as cli_create
from google.adk.cli.utils import _onboarding
from google.adk.cli.utils import gcp_utils
import pytest


# Helpers
class _Recorder:
  """A callable object that records every invocation."""

  def __init__(self) -> None:
    self.calls: List[Tuple[Tuple[Any, ...], Dict[str, Any]]] = []

  def __call__(self, *args: Any, **kwargs: Any) -> None:  # noqa: D401
    self.calls.append((args, kwargs))


# Fixtures
@pytest.fixture(autouse=True)
def _mute_click(monkeypatch: pytest.MonkeyPatch) -> None:
  """Silence click output in every test."""
  monkeypatch.setattr(click, "echo", lambda *a, **k: None)
  monkeypatch.setattr(click, "secho", lambda *a, **k: None)


@pytest.fixture()
def agent_folder(tmp_path: Path) -> Path:
  """Return a temporary path that will hold generated agent sources."""
  return tmp_path / "agent"


# _generate_files
def test_generate_files_with_api_key(agent_folder: Path) -> None:
  """Files should be created with the API-key backend and correct .env flags."""
  cli_create._generate_files(
      str(agent_folder),
      google_api_key="dummy-key",
      model="gemini-2.5-flash",
      type="code",
  )

  env_content = (agent_folder / ".env").read_text()
  assert "GOOGLE_API_KEY=dummy-key" in env_content
  assert "GOOGLE_GENAI_USE_ENTERPRISE=0" in env_content
  assert (agent_folder / ".gitignore").read_text() == ".env\n"
  assert (agent_folder / "agent.py").exists()
  assert (agent_folder / "__init__.py").exists()


def test_generate_files_with_gcp(agent_folder: Path) -> None:
  """Files should be created with Vertex AI backend and correct .env flags."""
  cli_create._generate_files(
      str(agent_folder),
      google_cloud_project="proj",
      google_cloud_region="us-central1",
      model="gemini-2.5-flash",
      type="code",
  )

  env_content = (agent_folder / ".env").read_text()
  assert "GOOGLE_CLOUD_PROJECT=proj" in env_content
  assert "GOOGLE_CLOUD_LOCATION=us-central1" in env_content
  assert "GOOGLE_GENAI_USE_ENTERPRISE=1" in env_content


def test_generate_files_with_express_mode(agent_folder: Path) -> None:
  """Files should be created with Vertex AI backend when both project and API key are present (Express Mode)."""
  cli_create._generate_files(
      str(agent_folder),
      google_api_key="express-api-key",
      google_cloud_project="express-project-id",
      google_cloud_region="us-central1",
      model="gemini-2.5-flash",
      type="code",
  )

  env_content = (agent_folder / ".env").read_text()
  assert "GOOGLE_GENAI_USE_ENTERPRISE=1" in env_content
  assert "GOOGLE_API_KEY=express-api-key" in env_content
  assert "GOOGLE_CLOUD_PROJECT=express-project-id" in env_content


def test_generate_files_overwrite(agent_folder: Path) -> None:
  """Existing files should be overwritten when generating again."""
  agent_folder.mkdir(parents=True, exist_ok=True)
  (agent_folder / ".env").write_text("OLD")

  cli_create._generate_files(
      str(agent_folder),
      google_api_key="new-key",
      model="gemini-2.5-flash",
      type="code",
  )

  assert "GOOGLE_API_KEY=new-key" in (agent_folder / ".env").read_text()


def test_generate_files_permission_error(
    monkeypatch: pytest.MonkeyPatch, agent_folder: Path
) -> None:
  """PermissionError raised by os.makedirs should propagate."""
  monkeypatch.setattr(
      os, "makedirs", lambda *a, **k: (_ for _ in ()).throw(PermissionError())
  )
  with pytest.raises(PermissionError):
    cli_create._generate_files(
        str(agent_folder), model="gemini-2.5-flash", type="code"
    )


def test_generate_files_no_params(agent_folder: Path) -> None:
  """No backend parameters → minimal .env file is generated."""
  cli_create._generate_files(
      str(agent_folder), model="gemini-2.5-flash", type="code"
  )

  env_content = (agent_folder / ".env").read_text()
  for key in (
      "GOOGLE_API_KEY",
      "GOOGLE_CLOUD_PROJECT",
      "GOOGLE_CLOUD_LOCATION",
      "GOOGLE_GENAI_USE_ENTERPRISE",
  ):
    assert key not in env_content


def test_generate_files_appends_dotenv_to_existing_gitignore(
    agent_folder: Path,
) -> None:
  """Existing .gitignore entries should be preserved."""
  agent_folder.mkdir(parents=True, exist_ok=True)
  (agent_folder / ".gitignore").write_text("__pycache__")

  cli_create._generate_files(
      str(agent_folder), model="gemini-2.0-flash-001", type="code"
  )

  assert (agent_folder / ".gitignore").read_text() == "__pycache__\n.env\n"


def test_generate_files_appends_dotenv_to_existing_gitignore_with_newline(
    agent_folder: Path,
) -> None:
  """Existing .gitignore entries ending in a newline should not cause extra blank lines."""
  agent_folder.mkdir(parents=True, exist_ok=True)
  (agent_folder / ".gitignore").write_text("__pycache__\n")

  cli_create._generate_files(
      str(agent_folder), model="gemini-2.0-flash-001", type="code"
  )

  assert (agent_folder / ".gitignore").read_text() == "__pycache__\n.env\n"


def test_generate_files_does_not_duplicate_dotenv_gitignore_entry(
    agent_folder: Path,
) -> None:
  """Existing .env ignore entries should not be duplicated."""
  agent_folder.mkdir(parents=True, exist_ok=True)
  (agent_folder / ".gitignore").write_text("__pycache__\n.env\n")

  cli_create._generate_files(
      str(agent_folder), model="gemini-2.0-flash-001", type="code"
  )

  assert (agent_folder / ".gitignore").read_text() == "__pycache__\n.env\n"


# run_cmd
def test_run_cmd_overwrite_reject(
    monkeypatch: pytest.MonkeyPatch, tmp_path: Path
) -> None:
  """User rejecting overwrite should trigger click.Abort."""
  agent_name = "agent"
  agent_dir = tmp_path / agent_name
  agent_dir.mkdir()
  (agent_dir / "dummy.txt").write_text("dummy")

  monkeypatch.setattr(os, "getcwd", lambda: str(tmp_path))
  monkeypatch.setattr(click, "confirm", lambda *a, **k: False)

  with pytest.raises(click.Abort):
    cli_create.run_cmd(
        agent_name,
        model="gemini-2.5-flash",
        google_api_key=None,
        google_cloud_project=None,
        google_cloud_region=None,
        type="code",
    )


def test_run_cmd_invalid_app_name(
    monkeypatch: pytest.MonkeyPatch, tmp_path: Path
) -> None:
  """Invalid app names should be rejected before creating any files."""
  monkeypatch.setattr(os, "getcwd", lambda: str(tmp_path))

  with pytest.raises(click.BadParameter, match="Invalid app name"):
    cli_create.run_cmd(
        "invalid name",
        model="gemini-2.5-flash",
        google_api_key=None,
        google_cloud_project=None,
        google_cloud_region=None,
        type="code",
    )


def test_run_cmd_with_type_config(
    monkeypatch: pytest.MonkeyPatch, tmp_path: Path
) -> None:
  """run_cmd with --type=config should generate YAML config file."""
  agent_name = "test_agent"

  monkeypatch.setattr(os, "getcwd", lambda: str(tmp_path))

  cli_create.run_cmd(
      agent_name,
      model="gemini-2.5-flash",
      google_api_key="test-key",
      google_cloud_project=None,
      google_cloud_region=None,
      type="config",
  )

  agent_dir = tmp_path / agent_name
  assert agent_dir.exists()

  # Should create root_agent.yaml instead of agent.py
  yaml_file = agent_dir / "root_agent.yaml"
  assert yaml_file.exists()
  assert not (agent_dir / "agent.py").exists()

  # Check YAML content
  yaml_content = yaml_file.read_text()
  assert "name: root_agent" in yaml_content
  assert "model: gemini-2.5-flash" in yaml_content
  assert "description: A helpful assistant for user questions." in yaml_content

  # Should create empty __init__.py
  init_file = agent_dir / "__init__.py"
  assert init_file.exists()
  assert init_file.read_text().strip() == ""

  # Should still create .env file
  env_file = agent_dir / ".env"
  assert env_file.exists()
  assert "GOOGLE_API_KEY=test-key" in env_file.read_text()
  assert (agent_dir / ".gitignore").read_text() == ".env\n"


# Prompt helpers
def test_prompt_for_google_cloud(monkeypatch: pytest.MonkeyPatch) -> None:
  """Prompt should return the project input."""
  monkeypatch.setattr(click, "prompt", lambda *a, **k: "test-proj")
  assert _onboarding.prompt_for_google_cloud(None) == "test-proj"


def test_prompt_for_google_cloud_region(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
  """Prompt should return the region input."""
  monkeypatch.setattr(click, "prompt", lambda *a, **k: "asia-northeast1")
  assert _onboarding.prompt_for_google_cloud_region(None) == "asia-northeast1"


def test_prompt_for_google_api_key(monkeypatch: pytest.MonkeyPatch) -> None:
  """Prompt should return the API-key input."""
  monkeypatch.setattr(click, "prompt", lambda *a, **k: "api-key")
  assert _onboarding.prompt_for_google_api_key(None) == "api-key"


def test_prompt_for_model_gemini(monkeypatch: pytest.MonkeyPatch) -> None:
  """Selecting option '1' should return the default Gemini model string."""
  monkeypatch.setattr(click, "prompt", lambda *a, **k: "1")
  assert cli_create._prompt_for_model() == "gemini-3.5-flash"


def test_prompt_for_model_other(monkeypatch: pytest.MonkeyPatch) -> None:
  """Selecting option '2' should return placeholder and call secho."""
  called: Dict[str, bool] = {}

  monkeypatch.setattr(click, "prompt", lambda *a, **k: "2")

  def _fake_secho(*_a: Any, **_k: Any) -> None:
    called["secho"] = True

  monkeypatch.setattr(click, "secho", _fake_secho)
  assert cli_create._prompt_for_model() == "<FILL_IN_MODEL>"
  assert called.get("secho") is True


# Backend selection helper
def test_prompt_to_choose_backend_api(monkeypatch: pytest.MonkeyPatch) -> None:
  """Choosing API-key backend returns (api_key, None, None)."""
  monkeypatch.setattr(click, "prompt", lambda *a, **k: "1")
  monkeypatch.setattr(
      _onboarding, "prompt_for_google_api_key", lambda _v: "api-key"
  )

  auth_info = _onboarding.prompt_to_choose_backend(None, None, None)
  assert isinstance(auth_info, _onboarding.GoogleAIAuth)
  assert auth_info.api_key == "api-key"


def test_prompt_to_choose_backend_vertex(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
  """Choosing Vertex backend returns (None, project, region)."""
  monkeypatch.setattr(click, "prompt", lambda *a, **k: "2")
  monkeypatch.setattr(_onboarding, "prompt_for_google_cloud", lambda _v: "proj")
  monkeypatch.setattr(
      _onboarding, "prompt_for_google_cloud_region", lambda _v: "region"
  )

  auth_info = _onboarding.prompt_to_choose_backend(None, None, None)
  assert isinstance(auth_info, _onboarding.VertexAIAuth)
  assert auth_info.project_id == "proj"
  assert auth_info.region == "region"


def test_prompt_to_choose_backend_login(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
  """Choosing Login with Google returns (api_key, project, region) from handler."""
  monkeypatch.setattr(click, "prompt", lambda *a, **k: "3")
  monkeypatch.setattr(
      _onboarding,
      "handle_login_with_google",
      lambda: _onboarding.ExpressModeAuth(
          api_key="api-key", project_id="proj", region="region"
      ),
  )

  auth_info = _onboarding.prompt_to_choose_backend(None, None, None)
  assert isinstance(auth_info, _onboarding.ExpressModeAuth)
  assert auth_info.api_key == "api-key"
  assert auth_info.project_id == "proj"
  assert auth_info.region == "region"


def test_handle_login_with_google_existing_express(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
  """Handler should return existing Express project if found."""
  monkeypatch.setattr(gcp_utils, "check_adc", lambda: True)
  monkeypatch.setattr(
      gcp_utils,
      "retrieve_express_project",
      lambda: {"api_key": "key", "project_id": "proj", "region": "us-central1"},
  )

  auth_info = _onboarding.handle_login_with_google()
  assert isinstance(auth_info, _onboarding.ExpressModeAuth)
  assert auth_info.api_key == "key"
  assert auth_info.project_id == "proj"
  assert auth_info.region == "us-central1"


def test_handle_login_with_google_select_gcp_project(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
  """Handler should prompt for project selection if no Express project found."""
  monkeypatch.setattr(gcp_utils, "check_adc", lambda: True)
  monkeypatch.setattr(gcp_utils, "retrieve_express_project", lambda: None)
  monkeypatch.setattr(
      gcp_utils, "list_gcp_projects", lambda limit: [("p1", "Project 1")]
  )
  monkeypatch.setattr(click, "prompt", lambda *a, **k: 1)
  monkeypatch.setattr(
      _onboarding, "prompt_for_google_cloud_region", lambda _v: "us-east1"
  )

  auth_info = _onboarding.handle_login_with_google()
  assert isinstance(auth_info, _onboarding.VertexAIAuth)
  assert auth_info.project_id == "p1"
  assert auth_info.region == "us-east1"


def test_handle_login_with_google_manual_project(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
  """Handler should allow manual project ID entry when '0' is selected."""
  monkeypatch.setattr(gcp_utils, "check_adc", lambda: True)
  monkeypatch.setattr(gcp_utils, "retrieve_express_project", lambda: None)
  monkeypatch.setattr(
      gcp_utils, "list_gcp_projects", lambda limit: [("p1", "Project 1")]
  )
  prompts = iter([0, "manual-proj", "us-east1"])
  monkeypatch.setattr(click, "prompt", lambda *a, **k: next(prompts))

  auth_info = _onboarding.handle_login_with_google()
  assert isinstance(auth_info, _onboarding.VertexAIAuth)
  assert auth_info.project_id == "manual-proj"
  assert auth_info.region == "us-east1"


def test_handle_login_with_google_option_1(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
  """User selects 1, enters project ID and region."""
  monkeypatch.setattr(gcp_utils, "check_adc", lambda: True)
  monkeypatch.setattr(gcp_utils, "retrieve_express_project", lambda: None)
  monkeypatch.setattr(gcp_utils, "list_gcp_projects", lambda limit: [])
  prompts = iter(["1", "test-proj", "us-east1"])
  monkeypatch.setattr(click, "prompt", lambda *a, **k: next(prompts))

  auth_info = _onboarding.handle_login_with_google()
  assert isinstance(auth_info, _onboarding.VertexAIAuth)
  assert auth_info.project_id == "test-proj"
  assert auth_info.region == "us-east1"


def test_handle_login_with_google_option_2(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
  """User selects 2, goes through express sign up."""
  monkeypatch.setattr(gcp_utils, "check_adc", lambda: True)
  monkeypatch.setattr(gcp_utils, "retrieve_express_project", lambda: None)
  monkeypatch.setattr(gcp_utils, "list_gcp_projects", lambda limit: [])
  monkeypatch.setattr(gcp_utils, "check_express_eligibility", lambda: True)
  monkeypatch.setattr(click, "confirm", lambda *a, **k: True)
  prompts = iter(["2", "1"])
  monkeypatch.setattr(click, "prompt", lambda *a, **k: next(prompts))
  monkeypatch.setattr(
      gcp_utils,
      "sign_up_express",
      lambda location="us-central1": {
          "api_key": "new-key",
          "project_id": "new-proj",
          "region": location,
      },
  )

  auth_info = _onboarding.handle_login_with_google()
  assert isinstance(auth_info, _onboarding.ExpressModeAuth)
  assert auth_info.api_key == "new-key"
  assert auth_info.project_id == "new-proj"
  assert auth_info.region == "us-central1"


def test_handle_login_with_google_option_2_unset_project(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
  """User selects 2, goes through express sign up, and unsets existing gcloud project."""
  monkeypatch.setattr(gcp_utils, "check_adc", lambda: True)
  monkeypatch.setattr(gcp_utils, "retrieve_express_project", lambda: None)
  monkeypatch.setattr(gcp_utils, "list_gcp_projects", lambda limit: [])
  monkeypatch.setattr(gcp_utils, "check_express_eligibility", lambda: True)

  confirms = iter([True, True])
  monkeypatch.setattr(click, "confirm", lambda *a, **k: next(confirms))

  prompts = iter(["2", "1"])
  monkeypatch.setattr(click, "prompt", lambda *a, **k: next(prompts))

  monkeypatch.setattr(
      gcp_utils,
      "sign_up_express",
      lambda location="us-central1": {
          "api_key": "new-key",
          "project_id": "new-proj",
          "region": location,
      },
  )

  monkeypatch.setattr(
      _onboarding, "get_gcp_project_from_gcloud", lambda: "old-proj"
  )

  called = {}

  def fake_run(cmd, **kwargs):
    if cmd == ["gcloud", "config", "unset", "project"]:
      called["unset"] = True
      return subprocess.CompletedProcess(args=cmd, returncode=0)
    raise ValueError(f"Unexpected command: {cmd}")

  monkeypatch.setattr(subprocess, "run", fake_run)

  auth_info = _onboarding.handle_login_with_google()
  assert isinstance(auth_info, _onboarding.ExpressModeAuth)
  assert auth_info.api_key == "new-key"
  assert auth_info.project_id == "new-proj"
  assert auth_info.region == "us-central1"
  assert called.get("unset") is True


def test_handle_login_with_google_option_3(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
  """User selects 3, aborts."""
  monkeypatch.setattr(gcp_utils, "retrieve_express_project", lambda: None)
  monkeypatch.setattr(gcp_utils, "list_gcp_projects", lambda limit: [])
  monkeypatch.setattr(click, "prompt", lambda *a, **k: "3")
  with pytest.raises(click.Abort):
    _onboarding.handle_login_with_google()


# prompt_str
def test_prompt_str_non_empty(monkeypatch: pytest.MonkeyPatch) -> None:
  """prompt_str should retry until a non-blank string is provided."""
  responses = iter(["", " ", "valid"])
  monkeypatch.setattr(click, "prompt", lambda *_a, **_k: next(responses))
  assert _onboarding.prompt_str("dummy") == "valid"


# gcloud fallback helpers
def test_get_gcp_project_from_gcloud_fail(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
  """Failure of gcloud project lookup should return empty string."""
  monkeypatch.setattr(
      subprocess,
      "run",
      lambda *_a, **_k: (_ for _ in ()).throw(FileNotFoundError()),
  )
  assert _onboarding.get_gcp_project_from_gcloud() == ""


def test_get_gcp_region_from_gcloud_fail(
    monkeypatch: pytest.MonkeyPatch,
) -> None:
  """CalledProcessError should result in empty region string."""
  monkeypatch.setattr(
      subprocess,
      "run",
      lambda *_a, **_k: (_ for _ in ()).throw(
          subprocess.CalledProcessError(1, "gcloud")
      ),
  )
  assert _onboarding.get_gcp_region_from_gcloud() == ""