import re
import sys
from typing import Match, Tuple, Union, Optional

import pytest
from nonebug import App

from nonebot.typing import T_State
from nonebot.exception import ParserExit, SkippedException
from utils import FakeMessage, FakeMessageSegment, make_fake_event
from nonebot.consts import (
    CMD_KEY,
    PREFIX_KEY,
    SHELL_ARGS,
    SHELL_ARGV,
    CMD_ARG_KEY,
    KEYWORD_KEY,
    ENDSWITH_KEY,
    FULLMATCH_KEY,
    REGEX_MATCHED,
    STARTSWITH_KEY,
    CMD_WHITESPACE_KEY,
)
from nonebot.rule import (
    CMD_RESULT,
    TRIE_VALUE,
    Rule,
    ToMeRule,
    TrieRule,
    Namespace,
    RegexRule,
    IsTypeRule,
    CommandRule,
    EndswithRule,
    KeywordsRule,
    FullmatchRule,
    ArgumentParser,
    StartswithRule,
    ShellCommandRule,
    regex,
    to_me,
    command,
    is_type,
    keyword,
    endswith,
    fullmatch,
    startswith,
    shell_command,
)


@pytest.mark.asyncio
async def test_rule(app: App):
    async def falsy():
        return False

    async def truthy():
        return True

    async def skipped() -> bool:
        raise SkippedException

    def _is_eq(a: Rule, b: Rule) -> bool:
        return {d.call for d in a.checkers} == {d.call for d in b.checkers}

    assert _is_eq(Rule(truthy) & None, Rule(truthy))
    assert _is_eq(Rule(truthy) & falsy, Rule(truthy, falsy))
    assert _is_eq(Rule(truthy) & Rule(falsy), Rule(truthy, falsy))

    assert _is_eq(None & Rule(truthy), Rule(truthy))
    assert _is_eq(truthy & Rule(falsy), Rule(truthy, falsy))

    event = make_fake_event()()

    async with app.test_api() as ctx:
        bot = ctx.create_bot()
        assert await Rule(falsy)(bot, event, {}) is False
        assert await Rule(truthy)(bot, event, {}) is True
        assert await Rule(skipped)(bot, event, {}) is False
        assert await Rule(truthy, falsy)(bot, event, {}) is False
        assert await Rule(truthy, skipped)(bot, event, {}) is False


@pytest.mark.asyncio
async def test_trie(app: App):
    TrieRule.add_prefix("/fake-prefix", TRIE_VALUE("/", ("fake-prefix",)))

    async with app.test_api() as ctx:
        bot = ctx.create_bot()
        message = FakeMessage("/fake-prefix some args")
        event = make_fake_event(_message=message)()
        state = {}
        TrieRule.get_value(bot, event, state)
        assert state[PREFIX_KEY] == CMD_RESULT(
            command=("fake-prefix",),
            raw_command="/fake-prefix",
            command_arg=FakeMessage("some args"),
            command_start="/",
            command_whitespace=" ",
        )

        message = FakeMessageSegment.text("/fake-prefix ") + FakeMessageSegment.image(
            "fake url"
        )
        event = make_fake_event(_message=message)()
        state = {}
        TrieRule.get_value(bot, event, state)
        assert state[PREFIX_KEY] == CMD_RESULT(
            command=("fake-prefix",),
            raw_command="/fake-prefix",
            command_arg=FakeMessage(FakeMessageSegment.image("fake url")),
            command_start="/",
            command_whitespace=" ",
        )

        message = FakeMessageSegment.text("/fake-prefix ") + FakeMessageSegment.text(
            " some args"
        )
        event = make_fake_event(_message=message)()
        state = {}
        TrieRule.get_value(bot, event, state)
        assert state[PREFIX_KEY] == CMD_RESULT(
            command=("fake-prefix",),
            raw_command="/fake-prefix",
            command_arg=FakeMessage("some args"),
            command_start="/",
            command_whitespace="  ",
        )

        message = (
            FakeMessageSegment.text("/fake-prefix ")
            + FakeMessageSegment.text("    ")
            + FakeMessageSegment.text(" some args")
        )
        event = make_fake_event(_message=message)()
        state = {}
        TrieRule.get_value(bot, event, state)
        assert state[PREFIX_KEY] == CMD_RESULT(
            command=("fake-prefix",),
            raw_command="/fake-prefix",
            command_arg=FakeMessage("some args"),
            command_start="/",
            command_whitespace="      ",
        )

    del TrieRule.prefix["/fake-prefix"]


@pytest.mark.asyncio
@pytest.mark.parametrize(
    ("msg", "ignorecase", "type", "text", "expected"),
    [
        ("prefix", False, "message", "prefix_", True),
        ("prefix", False, "message", "Prefix_", False),
        ("prefix", True, "message", "prefix_", True),
        ("prefix", True, "message", "Prefix_", True),
        ("prefix", False, "message", "prefoo", False),
        ("prefix", False, "message", "fooprefix", False),
        ("prefix", False, "message", None, False),
        (("prefix", "foo"), False, "message", "fooprefix", True),
        ("prefix", False, "notice", "prefix", True),
        ("prefix", False, "notice", "foo", False),
    ],
)
async def test_startswith(
    msg: Union[str, Tuple[str, ...]],
    ignorecase: bool,
    type: str,
    text: Optional[str],
    expected: bool,
):
    test_startswith = startswith(msg, ignorecase)
    dependent = next(iter(test_startswith.checkers))
    checker = dependent.call

    msg = (msg,) if isinstance(msg, str) else msg

    assert isinstance(checker, StartswithRule)
    assert checker.msg == msg
    assert checker.ignorecase == ignorecase

    message = text if text is None else FakeMessage(text)
    event = make_fake_event(_type=type, _message=message)()
    for prefix in msg:
        state = {STARTSWITH_KEY: prefix}
        assert await dependent(event=event, state=state) == expected


@pytest.mark.asyncio
@pytest.mark.parametrize(
    ("msg", "ignorecase", "type", "text", "expected"),
    [
        ("suffix", False, "message", "_suffix", True),
        ("suffix", False, "message", "_Suffix", False),
        ("suffix", True, "message", "_suffix", True),
        ("suffix", True, "message", "_Suffix", True),
        ("suffix", False, "message", "suffoo", False),
        ("suffix", False, "message", "suffixfoo", False),
        ("suffix", False, "message", None, False),
        (("suffix", "foo"), False, "message", "suffixfoo", True),
        ("suffix", False, "notice", "suffix", True),
        ("suffix", False, "notice", "foo", False),
    ],
)
async def test_endswith(
    msg: Union[str, Tuple[str, ...]],
    ignorecase: bool,
    type: str,
    text: Optional[str],
    expected: bool,
):
    test_endswith = endswith(msg, ignorecase)
    dependent = next(iter(test_endswith.checkers))
    checker = dependent.call

    msg = (msg,) if isinstance(msg, str) else msg

    assert isinstance(checker, EndswithRule)
    assert checker.msg == msg
    assert checker.ignorecase == ignorecase

    message = text if text is None else FakeMessage(text)
    event = make_fake_event(_type=type, _message=message)()
    for suffix in msg:
        state = {ENDSWITH_KEY: suffix}
        assert await dependent(event=event, state=state) == expected


@pytest.mark.asyncio
@pytest.mark.parametrize(
    ("msg", "ignorecase", "type", "text", "expected"),
    [
        ("fullmatch", False, "message", "fullmatch", True),
        ("fullmatch", False, "message", "Fullmatch", False),
        ("fullmatch", True, "message", "fullmatch", True),
        ("fullmatch", True, "message", "Fullmatch", True),
        ("fullmatch", False, "message", "fullfoo", False),
        ("fullmatch", False, "message", "_fullmatch_", False),
        ("fullmatch", False, "message", None, False),
        (("fullmatch", "foo"), False, "message", "fullmatchfoo", False),
        ("fullmatch", False, "notice", "fullmatch", True),
        ("fullmatch", False, "notice", "foo", False),
    ],
)
async def test_fullmatch(
    msg: Union[str, Tuple[str, ...]],
    ignorecase: bool,
    type: str,
    text: Optional[str],
    expected: bool,
):
    test_fullmatch = fullmatch(msg, ignorecase)
    dependent = next(iter(test_fullmatch.checkers))
    checker = dependent.call

    msg = (msg,) if isinstance(msg, str) else msg

    assert isinstance(checker, FullmatchRule)
    assert checker.msg == msg
    assert checker.ignorecase == ignorecase

    message = text if text is None else FakeMessage(text)
    event = make_fake_event(_type=type, _message=message)()
    for full in msg:
        state = {FULLMATCH_KEY: full}
        assert await dependent(event=event, state=state) == expected


@pytest.mark.asyncio
@pytest.mark.parametrize(
    ("kws", "type", "text", "expected"),
    [
        (("key",), "message", "_key_", True),
        (("key", "foo"), "message", "_foo_", True),
        (("key",), "message", None, False),
        (("key",), "message", "foo", False),
        (("key",), "notice", "_key_", True),
        (("key",), "notice", "foo", False),
    ],
)
async def test_keyword(
    kws: Tuple[str, ...],
    type: str,
    text: Optional[str],
    expected: bool,
):
    test_keyword = keyword(*kws)
    dependent = next(iter(test_keyword.checkers))
    checker = dependent.call

    assert isinstance(checker, KeywordsRule)
    assert checker.keywords == kws

    message = text if text is None else FakeMessage(text)
    event = make_fake_event(_type=type, _message=message)()
    for kw in kws:
        state = {KEYWORD_KEY: kw}
        assert await dependent(event=event, state=state) == expected


@pytest.mark.asyncio
@pytest.mark.parametrize(
    ("cmds", "force_whitespace", "cmd", "whitespace", "arg_text", "expected"),
    [
        # command tests
        ((("help",),), None, ("help",), None, None, True),
        ((("help",),), None, ("foo",), None, None, False),
        ((("help", "foo"),), None, ("help", "foo"), None, None, True),
        ((("help", "foo"),), None, ("help", "bar"), None, None, False),
        ((("help",), ("foo",)), None, ("help",), None, None, True),
        ((("help",), ("foo",)), None, ("bar",), None, None, False),
        # whitespace tests
        ((("help",),), True, ("help",), " ", "arg", True),
        ((("help",),), True, ("help",), None, "arg", False),
        ((("help",),), True, ("help",), None, None, True),
        ((("help",),), False, ("help",), " ", "arg", False),
        ((("help",),), False, ("help",), None, "arg", True),
        ((("help",),), False, ("help",), None, None, True),
        ((("help",),), " ", ("help",), " ", "arg", True),
        ((("help",),), " ", ("help",), "\n", "arg", False),
        ((("help",),), " ", ("help",), None, "arg", False),
        ((("help",),), " ", ("help",), None, None, True),
    ],
)
async def test_command(
    cmds: Tuple[Tuple[str, ...]],
    force_whitespace: Optional[Union[str, bool]],
    cmd: Tuple[str, ...],
    whitespace: Optional[str],
    arg_text: Optional[str],
    expected: bool,
):
    test_command = command(*cmds, force_whitespace=force_whitespace)
    dependent = next(iter(test_command.checkers))
    checker = dependent.call

    assert isinstance(checker, CommandRule)
    assert checker.cmds == cmds

    arg = arg_text if arg_text is None else FakeMessage(arg_text)
    state = {
        PREFIX_KEY: {CMD_KEY: cmd, CMD_WHITESPACE_KEY: whitespace, CMD_ARG_KEY: arg}
    }
    assert await dependent(state=state) == expected


@pytest.mark.asyncio
async def test_shell_command():
    state: T_State
    CMD = ("test",)
    Message = FakeMessage
    MessageSegment = Message.get_segment_class()

    test_not_cmd = shell_command(CMD)
    dependent = next(iter(test_not_cmd.checkers))
    checker = dependent.call
    assert isinstance(checker, ShellCommandRule)
    message = Message()
    event = make_fake_event(_message=message)()
    state = {PREFIX_KEY: {CMD_KEY: ("not",), CMD_ARG_KEY: message}}
    assert not await dependent(event=event, state=state)

    test_no_parser = shell_command(CMD)
    dependent = next(iter(test_no_parser.checkers))
    checker = dependent.call
    assert isinstance(checker, ShellCommandRule)
    message = Message()
    event = make_fake_event(_message=message)()
    state = {PREFIX_KEY: {CMD_KEY: CMD, CMD_ARG_KEY: message}}
    assert await dependent(event=event, state=state)
    assert state[SHELL_ARGV] == []
    assert SHELL_ARGS not in state

    parser = ArgumentParser("test")
    parser.add_argument("-a", required=True)

    test_simple_parser = shell_command(CMD, parser=parser)
    dependent = next(iter(test_simple_parser.checkers))
    checker = dependent.call
    assert isinstance(checker, ShellCommandRule)
    message = Message("-a 1")
    event = make_fake_event(_message=message)()
    state = {PREFIX_KEY: {CMD_KEY: CMD, CMD_ARG_KEY: message}}
    assert await dependent(event=event, state=state)
    assert state[SHELL_ARGV] == ["-a", "1"]
    assert state[SHELL_ARGS] == Namespace(a="1")

    test_parser_help = shell_command(CMD, parser=parser)
    dependent = next(iter(test_parser_help.checkers))
    checker = dependent.call
    assert isinstance(checker, ShellCommandRule)
    message = Message("-h")
    event = make_fake_event(_message=message)()
    state = {PREFIX_KEY: {CMD_KEY: CMD, CMD_ARG_KEY: message}}
    assert await dependent(event=event, state=state)
    assert state[SHELL_ARGV] == ["-h"]
    assert isinstance(state[SHELL_ARGS], ParserExit)
    assert state[SHELL_ARGS].status == 0
    assert state[SHELL_ARGS].message == parser.format_help()

    test_parser_error = shell_command(CMD, parser=parser)
    dependent = next(iter(test_parser_error.checkers))
    checker = dependent.call
    assert isinstance(checker, ShellCommandRule)
    message = Message()
    event = make_fake_event(_message=message)()
    state = {PREFIX_KEY: {CMD_KEY: CMD, CMD_ARG_KEY: message}}
    assert await dependent(event=event, state=state)
    assert state[SHELL_ARGV] == []
    assert isinstance(state[SHELL_ARGS], ParserExit)
    assert state[SHELL_ARGS].status != 0
    assert state[SHELL_ARGS].message.startswith(parser.format_usage() + "test: error:")

    test_parser_remain_args = shell_command(CMD, parser=parser)
    dependent = next(iter(test_parser_remain_args.checkers))
    checker = dependent.call
    assert isinstance(checker, ShellCommandRule)
    message = MessageSegment.text("-a 1 2") + MessageSegment.image("test")
    event = make_fake_event(_message=message)()
    state = {PREFIX_KEY: {CMD_KEY: CMD, CMD_ARG_KEY: message}}
    assert await dependent(event=event, state=state)
    assert state[SHELL_ARGV] == ["-a", "1", "2", MessageSegment.image("test")]
    assert isinstance(state[SHELL_ARGS], ParserExit)
    assert state[SHELL_ARGS].status != 0
    assert state[SHELL_ARGS].message.startswith(parser.format_usage() + "test: error:")

    test_message_parser = shell_command(CMD, parser=parser)
    dependent = next(iter(test_message_parser.checkers))
    checker = dependent.call
    assert isinstance(checker, ShellCommandRule)
    message = MessageSegment.text("-a") + MessageSegment.image("test")
    event = make_fake_event(_message=message)()
    state = {PREFIX_KEY: {CMD_KEY: CMD, CMD_ARG_KEY: message}}
    assert await dependent(event=event, state=state)
    assert state[SHELL_ARGV] == ["-a", MessageSegment.image("test")]
    assert state[SHELL_ARGS] == Namespace(a=MessageSegment.image("test"))

    if sys.version_info >= (3, 9):
        parser = ArgumentParser("test", exit_on_error=False)
        parser.add_argument("-a", required=True)

        test_not_exit = shell_command(CMD, parser=parser)
        dependent = next(iter(test_not_exit.checkers))
        checker = dependent.call
        assert isinstance(checker, ShellCommandRule)
        message = Message()
        event = make_fake_event(_message=message)()
        state = {PREFIX_KEY: {CMD_KEY: CMD, CMD_ARG_KEY: message}}
        assert await dependent(event=event, state=state)
        assert state[SHELL_ARGV] == []
        assert isinstance(state[SHELL_ARGS], ParserExit)
        assert state[SHELL_ARGS].status != 0


@pytest.mark.asyncio
@pytest.mark.parametrize(
    ("pattern", "type", "text", "expected", "matched"),
    [
        (
            r"(?P<key>key\d)",
            "message",
            "_key1_",
            True,
            re.search(r"(?P<key>key\d)", "_key1_"),
        ),
        (r"foo", "message", None, False, None),
        (r"foo", "notice", "foo", True, re.search(r"foo", "foo")),
        (r"foo", "notice", "bar", False, None),
    ],
)
async def test_regex(
    pattern: str,
    type: str,
    text: Optional[str],
    expected: bool,
    matched: Optional[Match[str]],
):
    test_regex = regex(pattern)
    dependent = next(iter(test_regex.checkers))
    checker = dependent.call

    assert isinstance(checker, RegexRule)
    assert checker.regex == pattern

    message = text if text is None else FakeMessage(text)
    event = make_fake_event(_type=type, _message=message)()
    state = {}
    assert await dependent(event=event, state=state) == expected
    result: Optional[Match[str]] = state.get(REGEX_MATCHED)
    if matched is None:
        assert result is None
    else:
        assert isinstance(result, Match)
        assert result.group() == matched.group()
        assert result.span() == matched.span()


@pytest.mark.asyncio
@pytest.mark.parametrize("expected", [True, False])
async def test_to_me(expected: bool):
    test_to_me = to_me()
    dependent = next(iter(test_to_me.checkers))
    checker = dependent.call

    assert isinstance(checker, ToMeRule)

    event = make_fake_event(_to_me=expected)()
    assert await dependent(event=event) == expected


@pytest.mark.asyncio
async def test_is_type():
    Event1 = make_fake_event()
    Event2 = make_fake_event()
    Event3 = make_fake_event()

    test_type = is_type(Event1, Event2)
    dependent = next(iter(test_type.checkers))
    checker = dependent.call

    assert isinstance(checker, IsTypeRule)

    event = Event1()
    assert await dependent(event=event)

    event = Event3()
    assert not await dependent(event=event)