# Copyright (c) 2026 Krzysztof Rudnicki. MIT licence.
"""Trigger resolution."""

from __future__ import annotations

from typing import TYPE_CHECKING

import pytest

from signal_bot.context import CommandContext
from signal_bot.models import parse_envelope
from signal_bot.registry import CommandRegistry, DuplicateTriggerError
from signal_bot.transport_fake import FakeTransport
from tests.conftest import WATCHED_GROUP, envelope

if TYPE_CHECKING:
    from signal_bot.config import Config
    from signal_bot.store import Store


async def _noop(ctx: CommandContext) -> None:
    return None


def test_resolves_a_registered_trigger() -> None:
    registry = CommandRegistry()
    registry.register("cat", ["!cat", "!kot"], _noop, "cat description")
    assert registry.resolve("!kot") is not None
    assert registry.resolve("!cat").name == "cat"


def test_resolution_is_case_insensitive_and_trims() -> None:
    registry = CommandRegistry()
    registry.register("cat", ["!cat"], _noop, "cat description")
    assert registry.resolve("  !CAT  ") is not None


def test_unknown_and_prefixless_text_resolves_to_nothing() -> None:
    registry = CommandRegistry()
    registry.register("cat", ["!cat"], _noop, "cat description")
    assert registry.resolve("!nope") is None
    assert registry.resolve("cat") is None


@pytest.mark.parametrize("text", [None, ""])
def test_empty_text_resolves_to_nothing(text: str | None) -> None:
    assert CommandRegistry().resolve(text) is None


def test_duplicate_trigger_is_rejected() -> None:
    registry = CommandRegistry()
    registry.register("cat", ["!cat"], _noop, "cat description")
    with pytest.raises(DuplicateTriggerError, match="!cat"):
        registry.register("feline", ["!cat"], _noop, "feline description")


def test_commands_lists_in_registration_order() -> None:
    registry = CommandRegistry()
    registry.register("cat", ["!cat"], _noop, "cat description")
    registry.register("dog", ["!dog"], _noop, "dog description")
    assert [c.name for c in registry.commands] == ["cat", "dog"]


def _ctx(transport: FakeTransport, store: Store, config: Config) -> CommandContext:
    message = parse_envelope(envelope(text="!papiez"))
    assert message is not None
    return CommandContext(
        message=message,
        group_id=WATCHED_GROUP,
        transport=transport,
        store=store,
        config=config,
        command_name="pope",
        now=100.0,
        day="2026-08-30",
    )


async def test_reply_image_defaults_to_no_caption(store: Store, config: Config) -> None:
    transport = FakeTransport()
    await _ctx(transport, store, config).reply_image("Zm9v")
    assert transport.sent[0].caption == ""


async def test_reply_image_passes_the_caption_through(store: Store, config: Config) -> None:
    """The caption rides in the same payload, so Signal shows one message."""
    transport = FakeTransport()
    await _ctx(transport, store, config).reply_image("Zm9v", "8. Telesfor")
    sent = transport.sent[0]
    assert sent.caption == "8. Telesfor"
    assert sent.image_base64 == "Zm9v"
    assert sent.quote is not None


async def _nothing(ctx: CommandContext) -> None:
    """A handler that does nothing, for tests about resolution only."""


def test_a_command_with_no_groups_exists_everywhere() -> None:
    registry = CommandRegistry()
    command = registry.register("open", ["!open"], _nothing, "everywhere")
    assert command.allowed_in("group-a==")
    assert registry.resolve_with_args("!open", "group-b==") is not None


def test_a_scoped_command_does_not_exist_elsewhere() -> None:
    """Not refused -- absent. A refusal would announce that it exists."""
    registry = CommandRegistry()
    registry.register("shy", ["!shy"], _nothing, "here only", groups=frozenset({"group-a=="}))
    assert registry.resolve_with_args("!shy", "group-a==") is not None
    assert registry.resolve_with_args("!shy", "group-b==") is None


def test_words_after_a_trigger_are_arguments_only_where_they_are_wanted() -> None:
    """ "!cat blah" has always resolved to nothing, and still does."""
    registry = CommandRegistry()
    registry.register("plain", ["!plain"], _nothing, "no arguments")
    registry.register("takes", ["!takes"], _nothing, "arguments", takes_args=True)
    assert registry.resolve_with_args("!plain blah", "g==") is None
    resolved = registry.resolve_with_args("!takes one two", "g==")
    assert resolved is not None
    assert resolved.args == ("one", "two")


def test_a_bare_trigger_has_no_arguments() -> None:
    registry = CommandRegistry()
    registry.register("takes", ["!takes"], _nothing, "arguments", takes_args=True)
    resolved = registry.resolve_with_args("!takes", "g==")
    assert resolved is not None
    assert resolved.args == ()


def test_nothing_resolves_out_of_an_empty_message() -> None:
    registry = CommandRegistry()
    registry.register("takes", ["!takes"], _nothing, "arguments", takes_args=True)
    assert registry.resolve_with_args(None, "g==") is None
    assert registry.resolve_with_args("   ", "g==") is None
    assert registry.resolve_with_args("!nobody has this", "g==") is None