from __future__ import annotations

import time

import pytest
from textual.widgets import Static

from vibe.cli.textual_ui.app import VibeApp
from vibe.cli.textual_ui.widgets.chat_input.container import ChatInputContainer
from vibe.cli.textual_ui.widgets.messages import BashOutputMessage, ErrorMessage


async def _wait_for_bash_output_message(
    vibe_app: VibeApp, pilot, timeout: float = 1.0
) -> BashOutputMessage:
    deadline = time.monotonic() + timeout
    while time.monotonic() < deadline:
        if message := next(iter(vibe_app.query(BashOutputMessage)), None):
            return message
        await pilot.pause(0.05)
    raise TimeoutError(f"BashOutputMessage did not appear within {timeout}s")


def assert_no_command_error(vibe_app: VibeApp) -> None:
    errors = list(vibe_app.query(ErrorMessage))
    if not errors:
        return

    disallowed = {
        "Command failed",
        "Command timed out",
        "No command provided after '!'",
    }
    offending = [
        getattr(err, "_error", "")
        for err in errors
        if getattr(err, "_error", "")
        and any(phrase in getattr(err, "_error", "") for phrase in disallowed)
    ]
    assert not offending, f"Unexpected command errors: {offending}"


@pytest.mark.asyncio
async def test_ui_reports_no_output(vibe_app: VibeApp) -> None:
    async with vibe_app.run_test() as pilot:
        chat_input = vibe_app.query_one(ChatInputContainer)
        chat_input.value = "!true"

        await pilot.press("enter")
        message = await _wait_for_bash_output_message(vibe_app, pilot)
        output_widget = message.query_one(".bash-output", Static)
        assert str(output_widget.render()) == "(no output)"
        assert_no_command_error(vibe_app)


@pytest.mark.asyncio
async def test_ui_shows_success_in_case_of_zero_code(vibe_app: VibeApp) -> None:
    async with vibe_app.run_test() as pilot:
        chat_input = vibe_app.query_one(ChatInputContainer)
        chat_input.value = "!true"

        await pilot.press("enter")
        message = await _wait_for_bash_output_message(vibe_app, pilot)
        assert message.has_class("bash-success")
        assert not message.has_class("bash-error")


@pytest.mark.asyncio
async def test_ui_shows_failure_in_case_of_non_zero_code(vibe_app: VibeApp) -> None:
    async with vibe_app.run_test() as pilot:
        chat_input = vibe_app.query_one(ChatInputContainer)
        chat_input.value = "!bash -lc 'exit 7'"

        await pilot.press("enter")
        message = await _wait_for_bash_output_message(vibe_app, pilot)
        assert message.has_class("bash-error")
        assert not message.has_class("bash-success")


@pytest.mark.asyncio
async def test_ui_handles_non_utf8_output(vibe_app: VibeApp) -> None:
    """Assert the UI accepts decoding a non-UTF8 sequence like `printf '\xf0\x9f\x98'`.
    Whereas `printf '\xf0\x9f\x98\x8b'` prints a smiley face (😋) and would work even without those changes.
    """
    async with vibe_app.run_test() as pilot:
        chat_input = vibe_app.query_one(ChatInputContainer)
        chat_input.value = "!printf '\\xff\\xfe'"

        await pilot.press("enter")
        message = await _wait_for_bash_output_message(vibe_app, pilot)
        output_widget = message.query_one(".bash-output", Static)
        # accept both possible encodings, as some shells emit escaped bytes as literal strings
        assert str(output_widget.render()) in {"��", "\xff\xfe", r"\xff\xfe"}
        assert_no_command_error(vibe_app)


@pytest.mark.asyncio
async def test_ui_handles_utf8_output(vibe_app: VibeApp) -> None:
    async with vibe_app.run_test() as pilot:
        chat_input = vibe_app.query_one(ChatInputContainer)
        chat_input.value = "!echo hello"

        await pilot.press("enter")
        message = await _wait_for_bash_output_message(vibe_app, pilot)
        output_widget = message.query_one(".bash-output", Static)
        assert str(output_widget.render()) == "hello"
        assert_no_command_error(vibe_app)


@pytest.mark.asyncio
async def test_ui_handles_non_utf8_stderr(vibe_app: VibeApp) -> None:
    async with vibe_app.run_test() as pilot:
        chat_input = vibe_app.query_one(ChatInputContainer)
        chat_input.value = "!bash -lc \"printf '\\\\xff\\\\xfe' 1>&2\""

        await pilot.press("enter")
        message = await _wait_for_bash_output_message(vibe_app, pilot)
        output_widget = message.query_one(".bash-output", Static)
        assert str(output_widget.render()) == "��"
        assert_no_command_error(vibe_app)