import importlib.util
import os
from pathlib import Path

import pytest

from reflex import constants
from reflex.compiler import compiler, utils
from reflex.components.base import document
from reflex.constants.compiler import PageNames
from reflex.utils.imports import ImportVar, ParsedImportDict
from reflex.vars.base import Var
from reflex.vars.sequence import LiteralStringVar


@pytest.mark.parametrize(
    "fields,test_default,test_rest",
    [
        (
            [ImportVar(tag="axios", is_default=True)],
            "axios",
            [],
        ),
        (
            [ImportVar(tag="foo"), ImportVar(tag="bar")],
            "",
            ["bar", "foo"],
        ),
        (
            [
                ImportVar(tag="axios", is_default=True),
                ImportVar(tag="foo"),
                ImportVar(tag="bar"),
            ],
            "axios",
            ["bar", "foo"],
        ),
    ],
)
def test_compile_import_statement(
    fields: list[ImportVar], test_default: str, test_rest: str
):
    """Test the compile_import_statement function.

    Args:
        fields: The fields to import.
        test_default: The expected output of default library.
        test_rest: The expected output rest libraries.
    """
    default, rest = utils.compile_import_statement(fields)
    assert default == test_default
    assert sorted(rest) == test_rest


@pytest.mark.parametrize(
    "import_dict,test_dicts",
    [
        ({}, []),
        (
            {"axios": [ImportVar(tag="axios", is_default=True)]},
            [{"lib": "axios", "default": "axios", "rest": []}],
        ),
        (
            {"axios": [ImportVar(tag="foo"), ImportVar(tag="bar")]},
            [{"lib": "axios", "default": "", "rest": ["bar", "foo"]}],
        ),
        (
            {
                "axios": [
                    ImportVar(tag="axios", is_default=True),
                    ImportVar(tag="foo"),
                    ImportVar(tag="bar"),
                ],
                "react": [ImportVar(tag="react", is_default=True)],
            },
            [
                {"lib": "axios", "default": "axios", "rest": ["bar", "foo"]},
                {"lib": "react", "default": "react", "rest": []},
            ],
        ),
        (
            {"": [ImportVar(tag="lib1.js"), ImportVar(tag="lib2.js")]},
            [
                {"lib": "lib1.js", "default": "", "rest": []},
                {"lib": "lib2.js", "default": "", "rest": []},
            ],
        ),
        (
            {
                "": [ImportVar(tag="lib1.js"), ImportVar(tag="lib2.js")],
                "axios": [ImportVar(tag="axios", is_default=True)],
            },
            [
                {"lib": "lib1.js", "default": "", "rest": []},
                {"lib": "lib2.js", "default": "", "rest": []},
                {"lib": "axios", "default": "axios", "rest": []},
            ],
        ),
    ],
)
def test_compile_imports(import_dict: ParsedImportDict, test_dicts: list[dict]):
    """Test the compile_imports function.

    Args:
        import_dict: The import dictionary.
        test_dicts: The expected output.
    """
    imports = utils.compile_imports(import_dict)
    for import_dict, test_dict in zip(imports, test_dicts, strict=True):
        assert import_dict["lib"] == test_dict["lib"]
        assert import_dict["default"] == test_dict["default"]
        assert (
            sorted(
                import_dict["rest"],
                key=lambda i: i if isinstance(i, str) else (i.tag or ""),
            )
            == test_dict["rest"]
        )


def test_compile_stylesheets(tmp_path: Path, mocker):
    """Test that stylesheets compile correctly.

    Args:
        tmp_path: The test directory.
        mocker: Pytest mocker object.
    """
    project = tmp_path / "test_project"
    project.mkdir()

    assets_dir = project / "assets"
    assets_dir.mkdir()

    (assets_dir / "style.css").write_text(
        "button.rt-Button {\n\tborder-radius:unset !important;\n}"
    )
    mocker.patch("reflex.compiler.compiler.Path.cwd", return_value=project)
    mocker.patch(
        "reflex.compiler.compiler.get_web_dir",
        return_value=project / constants.Dirs.WEB,
    )
    mocker.patch(
        "reflex.compiler.utils.get_web_dir", return_value=project / constants.Dirs.WEB
    )

    stylesheets = [
        "https://fonts.googleapis.com/css?family=Sofia&effect=neon|outline|emboss|shadow-multiple",
        "https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css",
        "/style.css",
        "https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap-theme.min.css",
    ]

    assert compiler.compile_root_stylesheet(stylesheets) == (
        str(
            project
            / constants.Dirs.WEB
            / "styles"
            / (PageNames.STYLESHEET_ROOT + ".css")
        ),
        "@import url('./tailwind.css'); \n"
        "@import url('https://fonts.googleapis.com/css?family=Sofia&effect=neon|outline|emboss|shadow-multiple'); \n"
        "@import url('https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css'); \n"
        "@import url('https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap-theme.min.css'); \n"
        "@import url('./style.css'); \n",
    )

    assert (project / constants.Dirs.WEB / "styles" / "style.css").read_text() == (
        assets_dir / "style.css"
    ).read_text()


def test_compile_stylesheets_scss_sass(tmp_path: Path, mocker):
    if importlib.util.find_spec("sass") is None:
        pytest.skip(
            'The `libsass` package is required to compile sass/scss stylesheet files. Run `pip install "libsass>=0.23.0"`.'
        )
    if os.name == "nt":
        pytest.skip("Skipping test on Windows")

    project = tmp_path / "test_project"
    project.mkdir()

    assets_dir = project / "assets"
    assets_dir.mkdir()

    assets_preprocess_dir = assets_dir / "preprocess"
    assets_preprocess_dir.mkdir()

    (assets_dir / "style.css").write_text(
        "button.rt-Button {\n\tborder-radius:unset !important;\n}"
    )
    (assets_preprocess_dir / "styles_a.sass").write_text(
        "button.rt-Button\n\tborder-radius:unset !important"
    )
    (assets_preprocess_dir / "styles_b.scss").write_text(
        "button.rt-Button {\n\tborder-radius:unset !important;\n}"
    )
    mocker.patch("reflex.compiler.compiler.Path.cwd", return_value=project)
    mocker.patch(
        "reflex.compiler.compiler.get_web_dir",
        return_value=project / constants.Dirs.WEB,
    )
    mocker.patch(
        "reflex.compiler.utils.get_web_dir", return_value=project / constants.Dirs.WEB
    )

    stylesheets = [
        "/style.css",
        "/preprocess/styles_a.sass",
        "/preprocess/styles_b.scss",
    ]

    assert compiler.compile_root_stylesheet(stylesheets) == (
        str(
            project
            / constants.Dirs.WEB
            / "styles"
            / (PageNames.STYLESHEET_ROOT + ".css")
        ),
        "@import url('./tailwind.css'); \n"
        "@import url('./style.css'); \n"
        f"@import url('./{Path('preprocess') / Path('styles_a.css')!s}'); \n"
        f"@import url('./{Path('preprocess') / Path('styles_b.css')!s}'); \n",
    )

    stylesheets = [
        "/style.css",
        "/preprocess",  # this is a folder containing "styles_a.sass" and "styles_b.scss"
    ]

    assert compiler.compile_root_stylesheet(stylesheets) == (
        str(
            project
            / constants.Dirs.WEB
            / "styles"
            / (PageNames.STYLESHEET_ROOT + ".css")
        ),
        "@import url('./tailwind.css'); \n"
        "@import url('./style.css'); \n"
        f"@import url('./{Path('preprocess') / Path('styles_a.css')!s}'); \n"
        f"@import url('./{Path('preprocess') / Path('styles_b.css')!s}'); \n",
    )

    assert (project / constants.Dirs.WEB / "styles" / "style.css").read_text() == (
        assets_dir / "style.css"
    ).read_text()

    expected_result = "button.rt-Button{border-radius:unset !important}\n"
    assert (
        project / constants.Dirs.WEB / "styles" / "preprocess" / "styles_a.css"
    ).read_text() == expected_result
    assert (
        project / constants.Dirs.WEB / "styles" / "preprocess" / "styles_b.css"
    ).read_text() == expected_result


def test_compile_stylesheets_exclude_tailwind(tmp_path, mocker):
    """Test that Tailwind is excluded if tailwind config is explicitly set to None.

    Args:
        tmp_path: The test directory.
        mocker: Pytest mocker object.
    """
    project = tmp_path / "test_project"
    project.mkdir()

    assets_dir = project / "assets"
    assets_dir.mkdir()
    mock = mocker.Mock()

    mocker.patch.object(mock, "tailwind", None)
    mocker.patch("reflex.compiler.compiler.get_config", return_value=mock)

    (assets_dir / "style.css").touch()
    mocker.patch("reflex.compiler.compiler.Path.cwd", return_value=project)

    stylesheets = [
        "/style.css",
    ]

    assert compiler.compile_root_stylesheet(stylesheets) == (
        str(Path(".web") / "styles" / (PageNames.STYLESHEET_ROOT + ".css")),
        "@import url('./style.css'); \n",
    )


def test_compile_nonexistent_stylesheet(tmp_path, mocker):
    """Test that an error is thrown for non-existent stylesheets.

    Args:
        tmp_path: The test directory.
        mocker: Pytest mocker object.
    """
    project = tmp_path / "test_project"
    project.mkdir()

    assets_dir = project / "assets"
    assets_dir.mkdir()

    mocker.patch("reflex.compiler.compiler.Path.cwd", return_value=project)

    stylesheets = ["/style.css"]

    with pytest.raises(FileNotFoundError):
        compiler.compile_root_stylesheet(stylesheets)


def test_create_document_root():
    """Test that the document root is created correctly."""
    # Test with no components.
    root = utils.create_document_root()
    root.render()
    assert isinstance(root, utils.Html)
    assert isinstance(root.children[0], utils.Head)
    # Default language.
    lang = root.lang  # pyright: ignore [reportAttributeAccessIssue]
    assert isinstance(lang, LiteralStringVar)
    assert lang.equals(Var.create("en"))
    # No children in head.
    assert len(root.children[0].children) == 4
    assert isinstance(root.children[0].children[0], utils.Meta)
    char_set = root.children[0].children[0].char_set  # pyright: ignore [reportAttributeAccessIssue]
    assert isinstance(char_set, LiteralStringVar)
    assert char_set.equals(Var.create("utf-8"))
    assert isinstance(root.children[0].children[1], utils.Meta)
    name = root.children[0].children[1].name  # pyright: ignore [reportAttributeAccessIssue]
    assert isinstance(name, LiteralStringVar)
    assert name.equals(Var.create("viewport"))
    assert isinstance(root.children[0].children[2], document.Meta)
    assert isinstance(root.children[0].children[3], document.Links)

    # Test with components.
    comps = [
        utils.Scripts.create(src="foo.js"),
        utils.Scripts.create(src="bar.js"),
    ]
    root = utils.create_document_root(
        head_components=comps,
        html_lang="rx",
        html_custom_attrs={"project": "reflex"},
    )
    # Two children in head.
    assert isinstance(root, utils.Html)
    assert len(root.children[0].children) == 2
    lang = root.lang  # pyright: ignore [reportAttributeAccessIssue]
    assert isinstance(lang, LiteralStringVar)
    assert lang.equals(Var.create("rx"))
    assert isinstance(root.custom_attrs, dict)
    assert root.custom_attrs == {"project": "reflex"}