import unittest
from unittest.mock import patch

from textual.widgets import Input, Label

from chat_tui.app import (
    RESPONSE_MESSAGES,
    ChatApp,
    ChatMessage,
    MessageRole,
)


class ChatAppTest(unittest.IsolatedAsyncioTestCase):
    async def test_submitted_input_and_response_are_displayed_in_order(self) -> None:
        app = ChatApp()
        with patch("chat_tui.app.random.choice", return_value=RESPONSE_MESSAGES[2]):
            async with app.run_test() as pilot:
                input_widget = app.query_one("#user-input", Input)
                input_widget.value = "  첫 번째 입력  "
                await pilot.press("enter")
                await pilot.pause()

                input_widget.value = "두 번째 입력"
                await pilot.press("enter")
                await pilot.pause()

                self.assertEqual(
                    app.submitted_inputs,
                    ["첫 번째 입력", "두 번째 입력"],
                )
                self.assertEqual(
                    app.selected_responses,
                    [RESPONSE_MESSAGES[2], RESPONSE_MESSAGES[2]],
                )
                self.assertEqual(
                    app.messages,
                    [
                        ChatMessage(MessageRole.USER, "첫 번째 입력"),
                        ChatMessage(MessageRole.AGENT, RESPONSE_MESSAGES[2]),
                        ChatMessage(MessageRole.USER, "두 번째 입력"),
                        ChatMessage(MessageRole.AGENT, RESPONSE_MESSAGES[2]),
                    ],
                )
                displayed = [
                    str(label.renderable)
                    for label in app.query("#conversation Label")
                ]
                self.assertEqual(
                    displayed,
                    [
                        "사용자: 첫 번째 입력",
                        f"에이전트: {RESPONSE_MESSAGES[2]}",
                        "사용자: 두 번째 입력",
                        f"에이전트: {RESPONSE_MESSAGES[2]}",
                    ],
                )
                self.assertEqual(input_widget.value, "")

    async def test_messages_have_explicit_roles_labels_and_structural_styles(
        self,
    ) -> None:
        app = ChatApp()
        with patch("chat_tui.app.random.choice", return_value=RESPONSE_MESSAGES[0]):
            async with app.run_test() as pilot:
                input_widget = app.query_one("#user-input", Input)
                input_widget.value = "역할 확인"
                await pilot.press("enter")
                await pilot.pause()

                labels = list(app.query("#conversation Label"))
                self.assertEqual(len(labels), 2)
                self.assertEqual(
                    labels[0].classes,
                    frozenset({"chat-message", "user-message", "user-role"}),
                )
                self.assertEqual(
                    labels[1].classes,
                    frozenset({"chat-message", "response-message", "agent-role"}),
                )
                self.assertIn("사용자:", str(labels[0].renderable))
                self.assertIn("에이전트:", str(labels[1].renderable))
                self.assertIn("border-left", app.CSS)
                self.assertIn("border-right", app.CSS)
                self.assertIn("align: left middle", app.CSS)
                self.assertIn("align: right middle", app.CSS)

    async def test_response_selection_uses_standard_random_choice(self) -> None:
        app = ChatApp()
        with patch(
            "chat_tui.app.random.choice",
            return_value=RESPONSE_MESSAGES[4],
        ) as choice_mock:
            async with app.run_test() as pilot:
                input_widget = app.query_one("#user-input", Input)
                input_widget.value = "처리할 입력"
                await pilot.press("enter")
                await pilot.pause()

        choice_mock.assert_called_once_with(RESPONSE_MESSAGES)

    async def test_whitespace_input_is_not_added(self) -> None:
        app = ChatApp()
        with patch("chat_tui.app.random.choice") as choice_mock:
            async with app.run_test() as pilot:
                input_widget = app.query_one("#user-input", Input)
                input_widget.value = "   \t  \n"
                await pilot.press("enter")
                await pilot.pause()

                self.assertEqual(app.submitted_inputs, [])
                self.assertEqual(app.selected_responses, [])
                self.assertEqual(app.messages, [])
                self.assertEqual(len(app.query("#conversation Label")), 0)
                choice_mock.assert_not_called()

    async def test_empty_input_is_not_added(self) -> None:
        app = ChatApp()
        async with app.run_test() as pilot:
            await pilot.press("enter")
            await pilot.pause()

            self.assertEqual(app.submitted_inputs, [])
            self.assertEqual(app.selected_responses, [])
            self.assertEqual(app.messages, [])
            self.assertEqual(len(app.query("#conversation Label")), 0)

    async def test_escape_requests_application_exit(self) -> None:
        app = ChatApp()
        with patch.object(app, "exit") as exit_mock:
            async with app.run_test() as pilot:
                await pilot.press("escape")
                await pilot.pause()

        exit_mock.assert_called_once_with()