"""Tests for search MCP tools."""

import pytest
from contextlib import asynccontextmanager
from datetime import datetime, timedelta

from basic_memory.mcp.tools import write_note
from basic_memory.mcp.tools.search import search_notes, _format_search_error_response
from basic_memory.schemas.search import SearchResponse


@pytest.mark.asyncio
async def test_search_text(client, test_project):
    """Test basic search functionality."""
    # Create a test note
    result = await write_note.fn(
        project=test_project.name,
        title="Test Search Note",
        directory="test",
        content="# Test\nThis is a searchable test note",
        tags=["test", "search"],
    )
    assert result

    # Search for it
    response = await search_notes.fn(project=test_project.name, query="searchable")

    # Verify results - handle both success and error cases
    if isinstance(response, SearchResponse):
        # Success case - verify SearchResponse
        assert len(response.results) > 0
        assert any(
            r.permalink == f"{test_project.name}/test/test-search-note"
            for r in response.results
        )
    else:
        # If search failed and returned error message, test should fail with informative message
        pytest.fail(f"Search failed with error: {response}")


@pytest.mark.asyncio
async def test_search_title(client, test_project):
    """Test basic search functionality."""
    # Create a test note
    result = await write_note.fn(
        project=test_project.name,
        title="Test Search Note",
        directory="test",
        content="# Test\nThis is a searchable test note",
        tags=["test", "search"],
    )
    assert result

    # Search for it
    response = await search_notes.fn(
        project=test_project.name, query="Search Note", search_type="title"
    )

    # Verify results - handle both success and error cases
    if isinstance(response, str):
        # If search failed and returned error message, test should fail with informative message
        pytest.fail(f"Search failed with error: {response}")
    else:
        # Success case - verify SearchResponse
        assert len(response.results) > 0
        assert any(
            r.permalink == f"{test_project.name}/test/test-search-note"
            for r in response.results
        )


@pytest.mark.asyncio
async def test_search_permalink(client, test_project):
    """Test basic search functionality."""
    # Create a test note
    result = await write_note.fn(
        project=test_project.name,
        title="Test Search Note",
        directory="test",
        content="# Test\nThis is a searchable test note",
        tags=["test", "search"],
    )
    assert result

    # Search for it
    response = await search_notes.fn(
        project=test_project.name,
        query=f"{test_project.name}/test/test-search-note",
        search_type="permalink",
    )

    # Verify results - handle both success and error cases
    if isinstance(response, SearchResponse):
        # Success case - verify SearchResponse
        assert len(response.results) > 0
        assert any(
            r.permalink == f"{test_project.name}/test/test-search-note"
            for r in response.results
        )
    else:
        # If search failed and returned error message, test should fail with informative message
        pytest.fail(f"Search failed with error: {response}")


@pytest.mark.asyncio
async def test_search_permalink_match(client, test_project):
    """Test basic search functionality."""
    # Create a test note
    result = await write_note.fn(
        project=test_project.name,
        title="Test Search Note",
        directory="test",
        content="# Test\nThis is a searchable test note",
        tags=["test", "search"],
    )
    assert result

    # Search for it
    response = await search_notes.fn(
        project=test_project.name,
        query=f"{test_project.name}/test/test-search-*",
        search_type="permalink",
    )

    # Verify results - handle both success and error cases
    if isinstance(response, SearchResponse):
        # Success case - verify SearchResponse
        assert len(response.results) > 0
        assert any(
            r.permalink == f"{test_project.name}/test/test-search-note"
            for r in response.results
        )
    else:
        # If search failed and returned error message, test should fail with informative message
        pytest.fail(f"Search failed with error: {response}")


@pytest.mark.asyncio
async def test_search_memory_url_with_project_prefix(client, test_project):
    """Test searching with a memory:// URL that includes the project prefix."""
    result = await write_note.fn(
        project=test_project.name,
        title="Memory URL Search Note",
        directory="test",
        content="# Memory URL Search\nThis note should be found via memory URL search",
    )
    assert result

    response = await search_notes.fn(
        query=f"memory://{test_project.name}/test/memory-url-search-note"
    )

    if isinstance(response, SearchResponse):
        assert len(response.results) > 0
        assert any(
            r.permalink == f"{test_project.name}/test/memory-url-search-note"
            for r in response.results
        )
    else:
        pytest.fail(f"Search failed with error: {response}")


@pytest.mark.asyncio
async def test_search_pagination(client, test_project):
    """Test basic search functionality."""
    # Create a test note
    result = await write_note.fn(
        project=test_project.name,
        title="Test Search Note",
        directory="test",
        content="# Test\nThis is a searchable test note",
        tags=["test", "search"],
    )
    assert result

    # Search for it
    response = await search_notes.fn(
        project=test_project.name, query="searchable", page=1, page_size=1
    )

    # Verify results - handle both success and error cases
    if isinstance(response, SearchResponse):
        # Success case - verify SearchResponse
        assert len(response.results) == 1
        assert any(
            r.permalink == f"{test_project.name}/test/test-search-note"
            for r in response.results
        )
    else:
        # If search failed and returned error message, test should fail with informative message
        pytest.fail(f"Search failed with error: {response}")


@pytest.mark.asyncio
async def test_search_with_type_filter(client, test_project):
    """Test search with entity type filter."""
    # Create test content
    await write_note.fn(
        project=test_project.name,
        title="Entity Type Test",
        directory="test",
        content="# Test\nFiltered by type",
    )

    # Search with type filter
    response = await search_notes.fn(project=test_project.name, query="type", types=["note"])

    # Verify results - handle both success and error cases
    if isinstance(response, SearchResponse):
        # Success case - verify all results are entities
        assert all(r.type == "entity" for r in response.results)
    else:
        # If search failed and returned error message, test should fail with informative message
        pytest.fail(f"Search failed with error: {response}")


@pytest.mark.asyncio
async def test_search_with_entity_type_filter(client, test_project):
    """Test search with entity type filter."""
    # Create test content
    await write_note.fn(
        project=test_project.name,
        title="Entity Type Test",
        directory="test",
        content="# Test\nFiltered by type",
    )

    # Search with entity type filter
    response = await search_notes.fn(
        project=test_project.name, query="type", entity_types=["entity"]
    )

    # Verify results - handle both success and error cases
    if isinstance(response, SearchResponse):
        # Success case - verify all results are entities
        assert all(r.type == "entity" for r in response.results)
    else:
        # If search failed and returned error message, test should fail with informative message
        pytest.fail(f"Search failed with error: {response}")


@pytest.mark.asyncio
async def test_search_with_date_filter(client, test_project):
    """Test search with date filter."""
    # Create test content
    await write_note.fn(
        project=test_project.name,
        title="Recent Note",
        directory="test",
        content="# Test\nRecent content",
    )

    # Search with date filter
    one_hour_ago = datetime.now() - timedelta(hours=1)
    response = await search_notes.fn(
        project=test_project.name, query="recent", after_date=one_hour_ago.isoformat()
    )

    # Verify results - handle both success and error cases
    if isinstance(response, SearchResponse):
        # Success case - verify we get results within timeframe
        assert len(response.results) > 0
    else:
        # If search failed and returned error message, test should fail with informative message
        pytest.fail(f"Search failed with error: {response}")


class TestSearchErrorFormatting:
    """Test search error formatting for better user experience."""

    def test_format_search_error_fts5_syntax(self):
        """Test formatting for FTS5 syntax errors."""
        result = _format_search_error_response(
            "test-project", "syntax error in FTS5", "test query("
        )

        assert "# Search Failed - Invalid Syntax" in result
        assert "The search query 'test query(' contains invalid syntax" in result
        assert "Special characters" in result
        assert "test query" in result  # Clean query without special chars

    def test_format_search_error_no_results(self):
        """Test formatting for no results found."""
        result = _format_search_error_response(
            "test-project", "no results found", "very specific query"
        )

        assert "# Search Complete - No Results Found" in result
        assert "No content found matching 'very specific query'" in result
        assert "Broaden your search" in result
        assert "very" in result  # Simplified query

    def test_format_search_error_server_error(self):
        """Test formatting for server errors."""
        result = _format_search_error_response(
            "test-project", "internal server error", "test query"
        )

        assert "# Search Failed - Server Error" in result
        assert "The search service encountered an error while processing 'test query'" in result
        assert "Try again" in result
        assert "Check project status" in result

    def test_format_search_error_permission_denied(self):
        """Test formatting for permission errors."""
        result = _format_search_error_response("test-project", "permission denied", "test query")

        assert "# Search Failed - Access Error" in result
        assert "You don't have permission to search" in result
        assert "Check your project access" in result

    def test_format_search_error_project_not_found(self):
        """Test formatting for project not found errors."""
        result = _format_search_error_response(
            "test-project", "current project not found", "test query"
        )

        assert "# Search Failed - Project Not Found" in result
        assert "The current project is not accessible" in result
        assert "Check available projects" in result

    def test_format_search_error_semantic_disabled(self):
        """Test formatting for semantic-search-disabled errors."""
        result = _format_search_error_response(
            "test-project",
            "Semantic search is disabled. Set BASIC_MEMORY_SEMANTIC_SEARCH_ENABLED=true.",
            "semantic query",
            "vector",
        )

        assert "# Search Failed - Semantic Search Disabled" in result
        assert "BASIC_MEMORY_SEMANTIC_SEARCH_ENABLED=true" in result
        assert 'search_type="text"' in result

    def test_format_search_error_semantic_dependencies_missing(self):
        """Test formatting for missing semantic dependencies."""
        result = _format_search_error_response(
            "test-project",
            "fastembed package is missing. Install semantic extras: pip install 'basic-memory[semantic]'",
            "semantic query",
            "hybrid",
        )

        assert "# Search Failed - Semantic Dependencies Missing" in result
        assert "pip install 'basic-memory[semantic]'" in result

    def test_format_search_error_generic(self):
        """Test formatting for generic errors."""
        result = _format_search_error_response("test-project", "unknown error", "test query")

        assert "# Search Failed" in result
        assert "Error searching for 'test query': unknown error" in result
        assert "## Troubleshooting steps:" in result


class TestSearchToolErrorHandling:
    """Test search tool exception handling."""

    @pytest.mark.asyncio
    async def test_search_notes_exception_handling(self, monkeypatch):
        """Test exception handling in search_notes."""
        import importlib

        search_mod = importlib.import_module("basic_memory.mcp.tools.search")
        clients_mod = importlib.import_module("basic_memory.mcp.clients")

        class StubProject:
            name = "test-project"
            external_id = "test-external-id"

        @asynccontextmanager
        async def fake_get_project_client(*args, **kwargs):
            yield (object(), StubProject())

        async def fake_resolve_project_and_path(
            client, identifier, project=None, context=None, headers=None
        ):
            return StubProject(), identifier, False

        # Mock SearchClient to raise an exception
        class MockSearchClient:
            def __init__(self, *args, **kwargs):
                pass

            async def search(self, *args, **kwargs):
                raise Exception("syntax error")

        monkeypatch.setattr(search_mod, "get_project_client", fake_get_project_client)
        monkeypatch.setattr(search_mod, "resolve_project_and_path", fake_resolve_project_and_path)
        # Patch at the clients module level where the import happens
        monkeypatch.setattr(clients_mod, "SearchClient", MockSearchClient)

        result = await search_mod.search_notes.fn(project="test-project", query="test query")
        assert isinstance(result, str)
        assert "# Search Failed - Invalid Syntax" in result

    @pytest.mark.asyncio
    async def test_search_notes_permission_error(self, monkeypatch):
        """Test search_notes with permission error."""
        import importlib

        search_mod = importlib.import_module("basic_memory.mcp.tools.search")
        clients_mod = importlib.import_module("basic_memory.mcp.clients")

        class StubProject:
            name = "test-project"
            external_id = "test-external-id"

        @asynccontextmanager
        async def fake_get_project_client(*args, **kwargs):
            yield (object(), StubProject())

        async def fake_resolve_project_and_path(
            client, identifier, project=None, context=None, headers=None
        ):
            return StubProject(), identifier, False

        # Mock SearchClient to raise a permission error
        class MockSearchClient:
            def __init__(self, *args, **kwargs):
                pass

            async def search(self, *args, **kwargs):
                raise Exception("permission denied")

        monkeypatch.setattr(search_mod, "get_project_client", fake_get_project_client)
        monkeypatch.setattr(search_mod, "resolve_project_and_path", fake_resolve_project_and_path)
        # Patch at the clients module level where the import happens
        monkeypatch.setattr(clients_mod, "SearchClient", MockSearchClient)

        result = await search_mod.search_notes.fn(project="test-project", query="test query")
        assert isinstance(result, str)
        assert "# Search Failed - Access Error" in result


@pytest.mark.asyncio
@pytest.mark.parametrize("search_type", ["vector", "hybrid"])
async def test_search_notes_sets_retrieval_mode_for_semantic_types(monkeypatch, search_type):
    """Vector/hybrid search types should populate retrieval_mode in API payload."""
    import importlib

    search_mod = importlib.import_module("basic_memory.mcp.tools.search")
    clients_mod = importlib.import_module("basic_memory.mcp.clients")

    class StubProject:
        project_url = "http://test"
        name = "test-project"
        id = 1
        external_id = "test-external-id"

    @asynccontextmanager
    async def fake_get_project_client(*args, **kwargs):
        yield (object(), StubProject())

    async def fake_resolve_project_and_path(
        client, identifier, project=None, context=None, headers=None
    ):
        return StubProject(), identifier, False

    captured_payload: dict = {}

    class MockSearchClient:
        def __init__(self, *args, **kwargs):
            pass

        async def search(self, payload, page, page_size):
            captured_payload.update(payload)
            return SearchResponse(results=[], current_page=page, page_size=page_size)

    monkeypatch.setattr(search_mod, "get_project_client", fake_get_project_client)
    monkeypatch.setattr(search_mod, "resolve_project_and_path", fake_resolve_project_and_path)
    monkeypatch.setattr(clients_mod, "SearchClient", MockSearchClient)

    result = await search_mod.search_notes.fn(
        project="test-project",
        query="semantic lookup",
        search_type=search_type,
    )

    assert isinstance(result, SearchResponse)
    assert captured_payload["text"] == "semantic lookup"
    assert captured_payload["retrieval_mode"] == search_type