"""Tests for modules/compose.py."""

import pytest
from unittest.mock import AsyncMock, patch

import yaml


def make_mock_mcp():
    tools: dict = {}

    class MockMCP:
        def tool(self):
            def decorator(fn):
                tools[fn.__name__] = fn
                return fn
            return decorator

    return MockMCP(), tools


def make_config():
    from mcp_synology_container.config import AppConfig, ConnectionConfig
    return AppConfig(
        schema_version=1,
        connection=ConnectionConfig(host="nas.local", port=443, https=True, verify_ssl=True),
        compose_base_path="/volume1/docker",
    )


SAMPLE_COMPOSE = """
services:
  web:
    image: nginx:1.24
    ports:
      - "80:80"
    environment:
      - APP_ENV=production
      - LOG_LEVEL=info
  db:
    image: postgres:15
    environment:
      POSTGRES_DB: mydb
      POSTGRES_USER: admin
"""


@pytest.mark.asyncio
async def test_read_compose():
    from mcp_synology_container.modules.compose import register_compose

    client = AsyncMock()
    # Simulate FileStation.Info success for the first filename
    client.request.return_value = {}
    client.download_text.return_value = SAMPLE_COMPOSE

    mcp, tools = make_mock_mcp()
    register_compose(mcp, make_config(), client)

    result = await tools["read_compose"]("myapp")
    assert "nginx:1.24" in result
    assert "postgres:15" in result


@pytest.mark.asyncio
async def test_read_compose_not_found():
    from mcp_synology_container.modules.compose import register_compose

    client = AsyncMock()
    # Simulate all FileStation.Info calls failing
    from mcp_synology_container.dsm_client import SynologyError
    client.request.side_effect = SynologyError("not found", code=408)

    mcp, tools = make_mock_mcp()
    register_compose(mcp, make_config(), client)

    result = await tools["read_compose"]("nonexistent")
    assert "No compose file found" in result


@pytest.mark.asyncio
async def test_update_image_tag_requires_confirmation():
    from mcp_synology_container.modules.compose import register_compose

    client = AsyncMock()
    client.request.return_value = {}
    client.download_text.return_value = SAMPLE_COMPOSE

    mcp, tools = make_mock_mcp()
    register_compose(mcp, make_config(), client)

    result = await tools["update_image_tag"]("myapp", "web", "1.25", confirmed=False)
    assert "confirmed=True" in result
    assert "nginx:1.24" in result
    assert "nginx:1.25" in result
    client.upload_text.assert_not_called()


@pytest.mark.asyncio
async def test_update_image_tag_confirmed():
    from mcp_synology_container.modules.compose import register_compose

    client = AsyncMock()
    client.request.return_value = {}
    client.download_text.return_value = SAMPLE_COMPOSE

    mcp, tools = make_mock_mcp()
    register_compose(mcp, make_config(), client)

    result = await tools["update_image_tag"]("myapp", "web", "1.25", confirmed=True)
    assert "nginx:1.24 → nginx:1.25" in result
    assert "redeploy_project" in result
    client.upload_text.assert_called_once()

    # Verify the uploaded content has the new tag
    uploaded_content = client.upload_text.call_args[0][2]
    parsed = yaml.safe_load(uploaded_content)
    assert parsed["services"]["web"]["image"] == "nginx:1.25"


@pytest.mark.asyncio
async def test_update_image_tag_service_not_found():
    from mcp_synology_container.modules.compose import register_compose

    client = AsyncMock()
    client.request.return_value = {}
    client.download_text.return_value = SAMPLE_COMPOSE

    mcp, tools = make_mock_mcp()
    register_compose(mcp, make_config(), client)

    result = await tools["update_image_tag"]("myapp", "nonexistent", "1.25", confirmed=True)
    assert "not found" in result
    assert "web" in result  # should list available services


@pytest.mark.asyncio
async def test_update_env_var_new_var_list_format():
    from mcp_synology_container.modules.compose import register_compose

    client = AsyncMock()
    client.request.return_value = {}
    client.download_text.return_value = SAMPLE_COMPOSE

    mcp, tools = make_mock_mcp()
    register_compose(mcp, make_config(), client)

    result = await tools["update_env_var"]("myapp", "web", "NEW_VAR", "value123", confirmed=True)
    assert "NEW_VAR=value123" in result

    uploaded_content = client.upload_text.call_args[0][2]
    parsed = yaml.safe_load(uploaded_content)
    env = parsed["services"]["web"]["environment"]
    assert any("NEW_VAR=value123" in str(e) for e in env)


@pytest.mark.asyncio
async def test_update_env_var_update_existing_list():
    from mcp_synology_container.modules.compose import register_compose

    client = AsyncMock()
    client.request.return_value = {}
    client.download_text.return_value = SAMPLE_COMPOSE

    mcp, tools = make_mock_mcp()
    register_compose(mcp, make_config(), client)

    result = await tools["update_env_var"]("myapp", "web", "LOG_LEVEL", "debug", confirmed=True)
    assert "LOG_LEVEL=debug" in result

    uploaded_content = client.upload_text.call_args[0][2]
    parsed = yaml.safe_load(uploaded_content)
    env = parsed["services"]["web"]["environment"]
    assert "LOG_LEVEL=debug" in env
    assert "LOG_LEVEL=info" not in env


@pytest.mark.asyncio
async def test_update_env_var_dict_format():
    from mcp_synology_container.modules.compose import register_compose

    client = AsyncMock()
    client.request.return_value = {}
    client.download_text.return_value = SAMPLE_COMPOSE

    mcp, tools = make_mock_mcp()
    register_compose(mcp, make_config(), client)

    # db service has dict-format environment
    result = await tools["update_env_var"]("myapp", "db", "POSTGRES_DB", "newdb", confirmed=True)
    assert "POSTGRES_DB=newdb" in result

    uploaded_content = client.upload_text.call_args[0][2]
    parsed = yaml.safe_load(uploaded_content)
    assert parsed["services"]["db"]["environment"]["POSTGRES_DB"] == "newdb"


@pytest.mark.asyncio
async def test_update_compose_invalid_yaml():
    from mcp_synology_container.modules.compose import register_compose

    client = AsyncMock()

    mcp, tools = make_mock_mcp()
    register_compose(mcp, make_config(), client)

    result = await tools["update_compose"]("myapp", "not: valid: yaml: {{{{", confirmed=True)
    assert "Invalid YAML" in result


@pytest.mark.asyncio
async def test_update_compose_missing_services_key():
    from mcp_synology_container.modules.compose import register_compose

    client = AsyncMock()

    mcp, tools = make_mock_mcp()
    register_compose(mcp, make_config(), client)

    result = await tools["update_compose"]("myapp", "version: '3'\n", confirmed=True)
    assert "services" in result


@pytest.mark.asyncio
async def test_update_compose_requires_confirmation():
    from mcp_synology_container.modules.compose import register_compose

    client = AsyncMock()
    client.request.return_value = {}

    mcp, tools = make_mock_mcp()
    register_compose(mcp, make_config(), client)

    result = await tools["update_compose"]("myapp", SAMPLE_COMPOSE, confirmed=False)
    assert "confirmed=True" in result
    client.upload_text.assert_not_called()