"""Tests for app.escalation module."""

from __future__ import annotations

from unittest.mock import AsyncMock, patch

import httpx
import pytest

from app.escalation import (
    EscalationPayload,
    EscalationResult,
    NoOpEscalator,
    WebhookEscalator,
)


def _make_payload(**kwargs) -> EscalationPayload:
    defaults = {
        "thread_id": "t1",
        "reason": "Agent cannot resolve",
        "conversation_summary": "User asked about refund policy",
    }
    defaults.update(kwargs)
    return EscalationPayload(**defaults)


@pytest.mark.unit
class TestEscalationPayload:
    def test_frozen(self) -> None:
        payload = _make_payload()
        with pytest.raises(Exception):
            payload.thread_id = "t2"  # type: ignore[misc]

    def test_default_metadata(self) -> None:
        payload = _make_payload()
        assert payload.metadata == {}

    def test_model_dump(self) -> None:
        payload = _make_payload(metadata={"key": "val"})
        data = payload.model_dump()
        assert data["thread_id"] == "t1"
        assert data["metadata"] == {"key": "val"}


@pytest.mark.unit
class TestEscalationResult:
    def test_frozen(self) -> None:
        result = EscalationResult(success=True, status_code=200, attempts=1, error=None)
        assert result.success
        assert result.status_code == 200


@pytest.mark.unit
class TestWebhookEscalator:
    @pytest.mark.asyncio
    async def test_empty_url_returns_failure(self) -> None:
        escalator = WebhookEscalator(url="", max_retries=3)
        result = await escalator.escalate(_make_payload())
        assert not result.success
        assert result.attempts == 0
        assert "not configured" in result.error

    @pytest.mark.asyncio
    async def test_successful_post(self) -> None:
        mock_response = AsyncMock()
        mock_response.status_code = 200

        mock_client = AsyncMock()
        mock_client.post = AsyncMock(return_value=mock_response)
        mock_client.__aenter__ = AsyncMock(return_value=mock_client)
        mock_client.__aexit__ = AsyncMock(return_value=False)

        with patch("app.escalation.httpx.AsyncClient", return_value=mock_client):
            escalator = WebhookEscalator(url="https://example.com/hook")
            result = await escalator.escalate(_make_payload())

        assert result.success
        assert result.status_code == 200
        assert result.attempts == 1

    @pytest.mark.asyncio
    async def test_retry_on_server_error(self) -> None:
        fail_response = AsyncMock()
        fail_response.status_code = 500
        success_response = AsyncMock()
        success_response.status_code = 200

        mock_client = AsyncMock()
        mock_client.post = AsyncMock(side_effect=[fail_response, fail_response, success_response])
        mock_client.__aenter__ = AsyncMock(return_value=mock_client)
        mock_client.__aexit__ = AsyncMock(return_value=False)

        with (
            patch("app.escalation.httpx.AsyncClient", return_value=mock_client),
            patch("app.escalation.asyncio.sleep", new_callable=AsyncMock),
        ):
            escalator = WebhookEscalator(url="https://example.com/hook", max_retries=3)
            result = await escalator.escalate(_make_payload())

        assert result.success
        assert result.attempts == 3

    @pytest.mark.asyncio
    async def test_all_retries_exhausted(self) -> None:
        fail_response = AsyncMock()
        fail_response.status_code = 500

        mock_client = AsyncMock()
        mock_client.post = AsyncMock(return_value=fail_response)
        mock_client.__aenter__ = AsyncMock(return_value=mock_client)
        mock_client.__aexit__ = AsyncMock(return_value=False)

        with (
            patch("app.escalation.httpx.AsyncClient", return_value=mock_client),
            patch("app.escalation.asyncio.sleep", new_callable=AsyncMock),
        ):
            escalator = WebhookEscalator(url="https://example.com/hook", max_retries=3)
            result = await escalator.escalate(_make_payload())

        assert not result.success
        assert result.attempts == 3
        assert "500" in result.error

    @pytest.mark.asyncio
    async def test_timeout_error(self) -> None:
        mock_client = AsyncMock()
        mock_client.post = AsyncMock(side_effect=httpx.TimeoutException("timeout"))
        mock_client.__aenter__ = AsyncMock(return_value=mock_client)
        mock_client.__aexit__ = AsyncMock(return_value=False)

        with (
            patch("app.escalation.httpx.AsyncClient", return_value=mock_client),
            patch("app.escalation.asyncio.sleep", new_callable=AsyncMock),
        ):
            escalator = WebhookEscalator(url="https://example.com/hook", max_retries=2)
            result = await escalator.escalate(_make_payload())

        assert not result.success
        assert "timed out" in result.error

    @pytest.mark.asyncio
    async def test_request_error(self) -> None:
        mock_client = AsyncMock()
        mock_client.post = AsyncMock(
            side_effect=httpx.RequestError("connection refused")
        )
        mock_client.__aenter__ = AsyncMock(return_value=mock_client)
        mock_client.__aexit__ = AsyncMock(return_value=False)

        with (
            patch("app.escalation.httpx.AsyncClient", return_value=mock_client),
            patch("app.escalation.asyncio.sleep", new_callable=AsyncMock),
        ):
            escalator = WebhookEscalator(url="https://example.com/hook", max_retries=1)
            result = await escalator.escalate(_make_payload())

        assert not result.success


@pytest.mark.unit
class TestNoOpEscalator:
    @pytest.mark.asyncio
    async def test_returns_disabled(self) -> None:
        escalator = NoOpEscalator()
        result = await escalator.escalate(_make_payload())
        assert not result.success
        assert result.attempts == 0
        assert "disabled" in result.error.lower()