# Copyright 2022- Python Language Server Contributors.

from typing import Any, Dict, List
from unittest.mock import Mock, patch

import jedi
import parso
import pytest

from pylsp import IS_WIN, lsp, uris
from pylsp.config.config import Config
from pylsp.plugins.rope_autoimport import (
    _get_score,
    _should_insert,
    cache,
    get_name_or_module,
    get_names,
)
from pylsp.plugins.rope_autoimport import (
    pylsp_completions as pylsp_autoimport_completions,
)
from pylsp.workspace import Workspace
from test.test_notebook_document import wait_for_condition
from test.test_utils import send_initialize_request, send_notebook_did_open

DOC_URI = uris.from_fs_path(__file__)


def contains_autoimport_completion(suggestion: Dict[str, Any], module: str) -> bool:
    """Checks if `suggestion` contains an autoimport completion for `module`."""
    return suggestion.get("label", "") == module and "import" in suggestion.get(
        "detail", ""
    )


def contains_autoimport_quickfix(suggestion: Dict[str, Any], module: str) -> bool:
    """Checks if `suggestion` contains an autoimport quick fix for `module`."""
    return suggestion.get("title", "") == f"import {module}"


@pytest.fixture(scope="session")
def autoimport_workspace(tmp_path_factory) -> Workspace:
    "Special autoimport workspace. Persists across sessions to make in-memory sqlite3 database fast."
    workspace = Workspace(
        uris.from_fs_path(str(tmp_path_factory.mktemp("pylsp"))), Mock()
    )
    workspace._config = Config(workspace.root_uri, {}, 0, {})
    workspace._config.update(
        {
            "rope_autoimport": {
                "memory": True,
                "enabled": True,
                "completions": {"enabled": True},
                "code_actions": {"enabled": True},
            }
        }
    )
    cache.reload_cache(workspace._config, workspace, single_thread=True)
    yield workspace
    workspace.close()


@pytest.fixture
def completions(config: Config, autoimport_workspace: Workspace, request) -> None:
    document, position = request.param
    com_position = {"line": 0, "character": position}
    autoimport_workspace.put_document(DOC_URI, source=document)
    doc = autoimport_workspace.get_document(DOC_URI)
    yield pylsp_autoimport_completions(
        config, autoimport_workspace, doc, com_position, None
    )
    autoimport_workspace.rm_document(DOC_URI)


def should_insert(phrase: str, position: int):
    expr = parso.parse(phrase)
    word_node = expr.get_leaf_for_position((1, position))
    return _should_insert(expr, word_node)


def check_dict(query: Dict, results: List[Dict]) -> bool:
    for result in results:
        if all(result[key] == query[key] for key in query.keys()):
            return True
    return False


@pytest.mark.parametrize("completions", [("""pathli """, 6)], indirect=True)
def test_autoimport_completion(completions) -> None:
    assert completions
    assert check_dict(
        {"label": "pathlib", "kind": lsp.CompletionItemKind.Module}, completions
    )


@pytest.mark.parametrize("completions", [("""import """, 7)], indirect=True)
def test_autoimport_import(completions) -> None:
    assert len(completions) == 0


@pytest.mark.parametrize("completions", [("""pathlib""", 2)], indirect=True)
def test_autoimport_pathlib(completions) -> None:
    assert completions[0]["label"] == "pathlib"

    start = {"line": 0, "character": 0}
    edit_range = {"start": start, "end": start}
    assert completions[0]["additionalTextEdits"] == [
        {"range": edit_range, "newText": "import pathlib\n"}
    ]


@pytest.mark.parametrize("completions", [("""import test\n""", 10)], indirect=True)
def test_autoimport_import_with_name(completions) -> None:
    assert len(completions) == 0


@pytest.mark.parametrize("completions", [("""def func(s""", 10)], indirect=True)
def test_autoimport_function(completions) -> None:
    assert len(completions) == 0


@pytest.mark.parametrize("completions", [("""class Test""", 10)], indirect=True)
def test_autoimport_class(completions) -> None:
    assert len(completions) == 0


@pytest.mark.parametrize("completions", [("""\n""", 0)], indirect=True)
def test_autoimport_empty_line(completions) -> None:
    assert len(completions) == 0


@pytest.mark.parametrize(
    "completions", [("""class Test(NamedTupl):""", 20)], indirect=True
)
def test_autoimport_class_complete(completions) -> None:
    assert len(completions) > 0


@pytest.mark.parametrize(
    "completions", [("""class Test(NamedTupl""", 20)], indirect=True
)
def test_autoimport_class_incomplete(completions) -> None:
    assert len(completions) > 0


@pytest.mark.parametrize("completions", [("""def func(s:Lis""", 12)], indirect=True)
def test_autoimport_function_typing(completions) -> None:
    assert len(completions) > 0
    assert check_dict({"label": "List"}, completions)


@pytest.mark.parametrize(
    "completions", [("""def func(s : Lis ):""", 16)], indirect=True
)
def test_autoimport_function_typing_complete(completions) -> None:
    assert len(completions) > 0
    assert check_dict({"label": "List"}, completions)


@pytest.mark.parametrize(
    "completions", [("""def func(s : Lis ) -> Generat:""", 29)], indirect=True
)
def test_autoimport_function_typing_return(completions) -> None:
    assert len(completions) > 0
    assert check_dict({"label": "Generator"}, completions)


def test_autoimport_defined_name(config, workspace) -> None:
    document = """List = "hi"\nLis"""
    com_position = {"line": 1, "character": 3}
    workspace.put_document(DOC_URI, source=document)
    doc = workspace.get_document(DOC_URI)
    completions = pylsp_autoimport_completions(
        config, workspace, doc, com_position, None
    )
    workspace.rm_document(DOC_URI)
    assert not check_dict({"label": "List"}, completions)


class TestShouldInsert:
    def test_dot(self) -> None:
        assert not should_insert("""str.""", 4)

    def test_dot_partial(self) -> None:
        assert not should_insert("""str.metho\n""", 9)

    def test_comment(self) -> None:
        assert not should_insert("""#""", 1)

    def test_comment_indent(self) -> None:
        assert not should_insert("""    # """, 5)

    def test_from(self) -> None:
        assert not should_insert("""from """, 5)
        assert should_insert("""from """, 4)


def test_sort_sources() -> None:
    result1 = _get_score(1, "import pathlib", "pathlib", "pathli")
    result2 = _get_score(2, "import pathlib", "pathlib", "pathli")
    assert result1 < result2


def test_sort_statements() -> None:
    result1 = _get_score(
        2, "from importlib_metadata import pathlib", "pathlib", "pathli"
    )
    result2 = _get_score(2, "import pathlib", "pathlib", "pathli")
    assert result1 > result2


def test_sort_both() -> None:
    result1 = _get_score(
        3, "from importlib_metadata import pathlib", "pathlib", "pathli"
    )
    result2 = _get_score(2, "import pathlib", "pathlib", "pathli")
    assert result1 > result2


def test_get_names() -> None:
    source = """
    from a import s as e
    import blah, bleh
    hello = "str"
    a, b = 1, 2
    def someone():
        soemthing
    class sfa:
        sfiosifo
    """
    results = get_names(jedi.Script(code=source))
    assert results == {"blah", "bleh", "e", "hello", "someone", "sfa", "a", "b"}


# Tests ruff, flake8 and pyflakes messages
@pytest.mark.parametrize(
    "message",
    ["Undefined name `os`", "F821 undefined name 'numpy'", "undefined name 'numpy'"],
)
def test_autoimport_code_actions_get_correct_module_name(
    autoimport_workspace, message
) -> None:
    source = "os.path.join('a', 'b')"
    autoimport_workspace.put_document(DOC_URI, source=source)
    doc = autoimport_workspace.get_document(DOC_URI)
    diagnostic = {
        "range": {
            "start": {"line": 0, "character": 0},
            "end": {"line": 0, "character": 2},
        },
        "message": message,
    }
    module_name = get_name_or_module(doc, diagnostic)
    autoimport_workspace.rm_document(DOC_URI)
    assert module_name == "os"


def make_context(module_name, line, character_start, character_end):
    return {
        "diagnostics": [
            {
                "message": f"undefined name '{module_name}'",
                "range": {
                    "start": {"line": line, "character": character_start},
                    "end": {"line": line, "character": character_end},
                },
            }
        ]
    }


def position(line, character):
    return {"line": line, "character": character}


@pytest.mark.skipif(IS_WIN, reason="Flaky on Windows")
def test_autoimport_code_actions_and_completions_for_notebook_document(
    client_server_pair,
) -> None:
    client, server = client_server_pair
    send_initialize_request(
        client,
        {
            "pylsp": {
                "plugins": {
                    "rope_autoimport": {
                        "memory": True,
                        "enabled": True,
                        "completions": {"enabled": True},
                    },
                }
            }
        },
    )
    with patch.object(server._endpoint, "notify") as mock_notify:
        # Expectations:
        # 1. We receive an autoimport suggestion for "os" in the first cell because
        #    os is imported after that.
        # 2. We don't receive an autoimport suggestion for "os" in the second cell because it's
        #    already imported in the second cell.
        # 3. We don't receive an autoimport suggestion for "os" in the third cell because it's
        #    already imported in the second cell.
        # 4. We receive an autoimport suggestion for "sys" because it's not already imported.
        # 5. If diagnostics doesn't contain "undefined name ...", we send empty quick fix suggestions.
        send_notebook_did_open(client, ["os", "import os\nos", "os", "sys"])
        wait_for_condition(lambda: mock_notify.call_count >= 4)
        # We received diagnostics messages for every cell
        assert all(
            "textDocument/publishDiagnostics" in c.args
            for c in mock_notify.call_args_list
        )

    rope_autoimport_settings = server.workspace._config.plugin_settings(
        "rope_autoimport"
    )
    assert rope_autoimport_settings.get("completions", {}).get("enabled", False) is True
    assert rope_autoimport_settings.get("memory", False) is True
    wait_for_condition(lambda: not cache.is_blocked())

    # 1.
    quick_fixes = server.code_actions("cell_1_uri", {}, make_context("os", 0, 0, 2))
    assert any(s for s in quick_fixes if contains_autoimport_quickfix(s, "os"))

    completions = server.completions("cell_1_uri", position(0, 2)).get("items")
    assert any(s for s in completions if contains_autoimport_completion(s, "os"))

    # 2.
    # We don't test code actions here as in this case, there would be no code actions sent bc
    # there wouldn't be a diagnostics message.
    completions = server.completions("cell_2_uri", position(1, 2)).get("items")
    assert not any(s for s in completions if contains_autoimport_completion(s, "os"))

    # 3.
    # Same as in 2.
    completions = server.completions("cell_3_uri", position(0, 2)).get("items")
    assert not any(s for s in completions if contains_autoimport_completion(s, "os"))

    # 4.
    quick_fixes = server.code_actions("cell_4_uri", {}, make_context("sys", 0, 0, 3))
    assert any(s for s in quick_fixes if contains_autoimport_quickfix(s, "sys"))

    completions = server.completions("cell_4_uri", position(0, 3)).get("items")
    assert any(s for s in completions if contains_autoimport_completion(s, "sys"))

    # 5.
    context = {"diagnostics": [{"message": "A random message"}]}
    quick_fixes = server.code_actions("cell_4_uri", {}, context)
    assert len(quick_fixes) == 0