# 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.

from types import SimpleNamespace
from unittest.mock import AsyncMock, Mock, patch

from artemis.agents.planner.planner import PlannerNode
from artemis.context import DevicePlatform, ArtemisContext
import pytest


class DummyState:
    def __init__(
        self,
        initial_goal,
        needs_replan=False,
        operator_raw_data=None,
        operator_replan_reason=None,
    ):
        self.initial_goal = initial_goal
        self.needs_replan = needs_replan
        self.operator_raw_data = operator_raw_data
        self.operator_replan_reason = operator_replan_reason


import base64
from io import BytesIO
from PIL import Image


def _valid_screen_base64():
    buffer = BytesIO()
    Image.new("RGB", (64, 64), "white").save(buffer, format="PNG")
    return base64.b64encode(buffer.getvalue()).decode("ascii")


@pytest.fixture
def mock_context():
    ctx = Mock(spec=ArtemisContext)
    ctx.device = Mock()
    ctx.device.mobile_platform = DevicePlatform.ANDROID
    ctx.adb_client = Mock()
    ctx.ui_adb_client = Mock()
    mock_screen_data = Mock()
    mock_screen_data.base64 = _valid_screen_base64()
    mock_screen_data.elements = []
    mock_screen_data.width = 1080
    mock_screen_data.height = 2400
    ctx.ui_adb_client.get_screen_data.return_value = mock_screen_data
    ctx.data_engine = None

    return ctx


@pytest.mark.asyncio
async def test_planner_initial_plan(mock_context):
    state = DummyState(
        initial_goal="Test Goal",
        operator_raw_data={"screenshot_b64": "dummy_base64_string"},
    )
    node = PlannerNode(mock_context)

    mock_llm = Mock()
    mock_response = Mock()
    mock_response.content = "- [ ] Subgoal 1"
    mock_response.tool_calls = []

    async def mock_astream(*args, **kwargs):
        yield mock_response

    mock_llm.astream.side_effect = mock_astream
    mock_llm.bind_tools = Mock(return_value=mock_llm)

    with patch("artemis.agents.planner.planner.get_llm", return_value=mock_llm):
        await node(state)

        assert mock_llm.astream.called
        args, kwargs = mock_llm.astream.call_args
        messages = args[0]

        system_msg = messages[0].content
        assert "## Role" in system_msg

        human_msg_content = messages[1].content
        assert isinstance(human_msg_content, list)
        assert human_msg_content[0]["type"] == "text"
        assert "Goal: Test Goal" in human_msg_content[0]["text"]


@pytest.mark.asyncio
@pytest.mark.parametrize("target", ["mixed", "computer"])
async def test_planner_knows_computer_plugins_with_mobile_primary_screen(mock_context, target):
    state = DummyState(initial_goal="按人工示范浏览首页")
    mock_context.execution_target = target
    mock_context.plugins = SimpleNamespace(prompt=lambda: "电脑插件：cua-driver，可按需加载")
    controller = Mock()
    controller.take_screenshot = AsyncMock(return_value=_valid_screen_base64())
    controller.get_screen_data = AsyncMock(
        return_value=SimpleNamespace(observation_text="电脑窗口状态")
    )
    llm = Mock()

    async def stream(*_args, **_kwargs):
        yield SimpleNamespace(content="- [ ] 浏览首页", tool_calls=[])

    llm.astream.side_effect = stream
    llm.bind_tools.return_value = llm
    with (
        patch("artemis.agents.planner.planner.get_llm", return_value=llm),
        patch("artemis.agents.planner.planner.UnifiedMobileController", return_value=controller),
    ):
        await PlannerNode(mock_context)(state)
    content = llm.astream.call_args.args[0][1].content
    text = "\n".join(part["text"] for part in content if part["type"] == "text")
    assert text.count("电脑插件：cua-driver") == 1
    assert f"当前主设备截图（{'电脑' if target == 'computer' else '安卓'}）" in text
    assert "不决定其他步骤的执行平台" in text


def test_validate_plan_format_single_sourced_status_alphabet():
    """Regression: the Planner's format gate is single-sourced from
    plan_grammar — a legal in-progress '[/]' line must never be rejected."""
    from artemis.agents.planner.planner import validate_plan_format

    valid, err = validate_plan_format(
        "- [x] Done milestone\n- [/] In-progress milestone\n  - [ ] Sub\n- [!] Blocked\n"
    )
    assert valid is True and err == ""

    # Every grammar status char is accepted; unknown ones are still rejected.
    from artemis.utils.plan_grammar import STATUS_CHARS

    for c in STATUS_CHARS:
        ok, _ = validate_plan_format(f"- [{c}] Milestone\n")
        assert ok is True

    bad, message = validate_plan_format("- [z] Bogus status\n")
    assert bad is False
    assert "Invalid task status" in message

    empty, message = validate_plan_format("# just prose\n")
    assert empty is False
    assert "at least one subgoal" in message