from __future__ import annotations

import io
from textwrap import dedent

import pytest

from vdirsyncer import cli
from vdirsyncer import exceptions
from vdirsyncer.cli.config import Config

invalid = object()


@pytest.fixture
def read_config(tmpdir, monkeypatch):
    def inner(cfg):
        errors = []
        monkeypatch.setattr("vdirsyncer.cli.cli_logger.error", errors.append)
        f = io.StringIO(dedent(cfg.format(base=str(tmpdir))))
        rv = Config.from_fileobject(f)
        monkeypatch.undo()
        return errors, rv

    return inner


def test_read_config(read_config):
    _errors, c = read_config(
        """
        [general]
        status_path = "/tmp/status/"

        [pair bob]
        a = "bob_a"
        b = "bob_b"
        collections = null

        [storage bob_a]
        type = "filesystem"
        path = "/tmp/contacts/"
        fileext = ".vcf"
        yesno = false
        number = 42

        [storage bob_b]
        type = "carddav"
        """
    )

    assert c.general == {"status_path": "/tmp/status/"}

    assert set(c.pairs) == {"bob"}
    bob = c.pairs["bob"]
    assert bob.collections is None

    assert c.storages == {
        "bob_a": {
            "type": "filesystem",
            "path": "/tmp/contacts/",
            "fileext": ".vcf",
            "yesno": False,
            "number": 42,
            "instance_name": "bob_a",
        },
        "bob_b": {"type": "carddav", "instance_name": "bob_b"},
    }


def test_missing_collections_param(read_config):
    with pytest.raises(exceptions.UserError) as excinfo:
        read_config(
            """
            [general]
            status_path = "/tmp/status/"

            [pair bob]
            a = "bob_a"
            b = "bob_b"

            [storage bob_a]
            type = "lmao"

            [storage bob_b]
            type = "lmao"
            """
        )

    assert "collections parameter missing" in str(excinfo.value)


def test_invalid_section_type(read_config):
    with pytest.raises(exceptions.UserError) as excinfo:
        read_config(
            """
            [general]
            status_path = "/tmp/status/"

            [bogus]
        """
        )

    assert "Unknown section" in str(excinfo.value)
    assert "bogus" in str(excinfo.value)


def test_missing_general_section(read_config):
    with pytest.raises(exceptions.UserError) as excinfo:
        read_config(
            """
            [pair my_pair]
            a = "my_a"
            b = "my_b"
            collections = null

            [storage my_a]
            type = "filesystem"
            path = "{base}/path_a/"
            fileext = ".txt"

            [storage my_b]
            type = "filesystem"
            path = "{base}/path_b/"
            fileext = ".txt"
            """
        )

    assert "Invalid general section." in str(excinfo.value)


def test_wrong_general_section(read_config):
    with pytest.raises(exceptions.UserError) as excinfo:
        read_config(
            """
            [general]
            wrong = true
            """
        )

    assert "Invalid general section." in str(excinfo.value)
    assert excinfo.value.problems == [
        "general section doesn't take the parameters: wrong",
        "general section is missing the parameters: status_path",
    ]


def test_invalid_storage_name(read_config):
    with pytest.raises(exceptions.UserError) as excinfo:
        read_config(
            """
        [general]
        status_path = "{base}/status/"

        [storage foo.bar]
        """
        )

    assert "invalid characters" in str(excinfo.value).lower()


def test_invalid_collections_arg(read_config):
    with pytest.raises(exceptions.UserError) as excinfo:
        read_config(
            """
        [general]
        status_path = "/tmp/status/"

        [pair foobar]
        a = "foo"
        b = "bar"
        collections = [null]

        [storage foo]
        type = "filesystem"
        path = "/tmp/foo/"
        fileext = ".txt"

        [storage bar]
        type = "filesystem"
        path = "/tmp/bar/"
        fileext = ".txt"
        """
        )

    assert "Expected string" in str(excinfo.value)


def test_duplicate_sections(read_config):
    with pytest.raises(exceptions.UserError) as excinfo:
        read_config(
            """
        [general]
        status_path = "/tmp/status/"

        [pair foobar]
        a = "foobar"
        b = "bar"
        collections = null

        [storage foobar]
        type = "filesystem"
        path = "/tmp/foo/"
        fileext = ".txt"

        [storage bar]
        type = "filesystem"
        path = "/tmp/bar/"
        fileext = ".txt"
        """
        )

    assert 'Name "foobar" already used' in str(excinfo.value)


def test_validate_collections_param():
    x = cli.config._validate_collections_param
    x(None)
    x(["c", "a", "b"])
    pytest.raises(ValueError, x, [None])
    pytest.raises(ValueError, x, ["a", "a", "a"])
    pytest.raises(ValueError, x, [[None, "a", "b"]])
    x([["c", None, "b"]])
    x([["c", "a", None]])
    x([["c", None, None]])


def test_invalid_implicit_value(read_config):
    expected_message = "`implicit` parameter must be 'create' or absent"
    with pytest.raises(exceptions.UserError) as excinfo:
        read_config(
            """
            [general]
            status_path = "/tmp/status/"

            [pair my_pair]
            a = "my_a"
            b = "my_b"
            collections = null
            implicit = "invalid"

            [storage my_a]
            type = "filesystem"
            path = "{base}/path_a/"
            fileext = ".txt"

            [storage my_b]
            type = "filesystem"
            path = "{base}/path_b/"
            fileext = ".txt"
            """
        )

    assert expected_message in str(excinfo.value)


def test_implicit_create_only(read_config):
    """Test that implicit create works."""
    errors, c = read_config(
        """
        [general]
        status_path = "/tmp/status/"

        [pair my_pair]
        a = "my_a"
        b = "my_b"
        collections = ["from a", "from b"]
        implicit = "create"

        [storage my_a]
        type = "filesystem"
        path = "{base}/path_a/"
        fileext = ".txt"

        [storage my_b]
        type = "filesystem"
        path = "{base}/path_b/"
        fileext = ".txt"
        """
    )

    assert not errors
    pair = c.pairs["my_pair"]
    assert pair.implicit == "create"