"""Unit tests for OpenAISentimentProvider reasoning and citations extraction."""

from __future__ import annotations

from datetime import datetime, timezone
from types import SimpleNamespace
from unittest.mock import AsyncMock, MagicMock, patch

import pytest

from app.providers.openai_sentiment import OpenAISentimentProvider


def _make_annotation(ann_type: str, url: str = "", title: str = "") -> SimpleNamespace:
    return SimpleNamespace(type=ann_type, url=url, title=title)


def _make_content_block(text: str, annotations: list | None = None) -> SimpleNamespace:
    block = SimpleNamespace(text=text, annotations=annotations or [])
    return block


def _make_message_item(content_blocks: list) -> SimpleNamespace:
    return SimpleNamespace(type="message", content=content_blocks)


def _make_web_search_item() -> SimpleNamespace:
    return SimpleNamespace(type="web_search_call")


def _build_response(json_text: str, annotations: list | None = None) -> SimpleNamespace:
    """Build a mock OpenAI Responses API response object."""
    content_block = _make_content_block(json_text, annotations or [])
    message_item = _make_message_item([content_block])
    items = [message_item]
    return SimpleNamespace(output=items)


def _build_response_with_search(
    json_text: str, annotations: list | None = None
) -> SimpleNamespace:
    """Build a response with a web_search_call item followed by a message with annotations."""
    search_item = _make_web_search_item()
    content_block = _make_content_block(json_text, annotations or [])
    message_item = _make_message_item([content_block])
    return SimpleNamespace(output=[search_item, message_item])


@pytest.fixture
def provider():
    """Create an OpenAISentimentProvider with a mocked client."""
    with patch("app.providers.openai_sentiment.AsyncOpenAI"):
        p = OpenAISentimentProvider(api_key="test-key")
    return p


class TestReasoningExtraction:
    """Tests for extracting reasoning from the parsed JSON response."""

    @pytest.mark.asyncio
    async def test_reasoning_extracted_from_json(self, provider):
        json_text = '{"classification": "bullish", "confidence": 85, "reasoning": "Strong earnings report"}'
        mock_response = _build_response(json_text)
        provider._client.responses.create = AsyncMock(return_value=mock_response)

        result = await provider.fetch_sentiment("AAPL")

        assert result.reasoning == "Strong earnings report"

    @pytest.mark.asyncio
    async def test_empty_reasoning_when_field_missing(self, provider):
        json_text = '{"classification": "neutral", "confidence": 50}'
        mock_response = _build_response(json_text)
        provider._client.responses.create = AsyncMock(return_value=mock_response)

        result = await provider.fetch_sentiment("MSFT")

        assert result.reasoning == ""

    @pytest.mark.asyncio
    async def test_empty_reasoning_when_field_is_empty_string(self, provider):
        json_text = '{"classification": "bearish", "confidence": 70, "reasoning": ""}'
        mock_response = _build_response(json_text)
        provider._client.responses.create = AsyncMock(return_value=mock_response)

        result = await provider.fetch_sentiment("TSLA")

        assert result.reasoning == ""


class TestCitationsExtraction:
    """Tests for extracting url_citation annotations from the response."""

    @pytest.mark.asyncio
    async def test_citations_extracted_from_annotations(self, provider):
        json_text = '{"classification": "bullish", "confidence": 90, "reasoning": "Good news"}'
        annotations = [
            _make_annotation("url_citation", url="https://example.com/1", title="Article 1"),
            _make_annotation("url_citation", url="https://example.com/2", title="Article 2"),
        ]
        mock_response = _build_response(json_text, annotations)
        provider._client.responses.create = AsyncMock(return_value=mock_response)

        result = await provider.fetch_sentiment("AAPL")

        assert len(result.citations) == 2
        assert result.citations[0] == {"url": "https://example.com/1", "title": "Article 1"}
        assert result.citations[1] == {"url": "https://example.com/2", "title": "Article 2"}

    @pytest.mark.asyncio
    async def test_empty_citations_when_no_annotations(self, provider):
        json_text = '{"classification": "neutral", "confidence": 50, "reasoning": "No news"}'
        mock_response = _build_response(json_text)
        provider._client.responses.create = AsyncMock(return_value=mock_response)

        result = await provider.fetch_sentiment("GOOG")

        assert result.citations == []

    @pytest.mark.asyncio
    async def test_non_url_citation_annotations_ignored(self, provider):
        json_text = '{"classification": "bearish", "confidence": 60, "reasoning": "Mixed signals"}'
        annotations = [
            _make_annotation("file_citation", url="https://file.com", title="File"),
            _make_annotation("url_citation", url="https://real.com", title="Real"),
        ]
        mock_response = _build_response(json_text, annotations)
        provider._client.responses.create = AsyncMock(return_value=mock_response)

        result = await provider.fetch_sentiment("META")

        assert len(result.citations) == 1
        assert result.citations[0] == {"url": "https://real.com", "title": "Real"}

    @pytest.mark.asyncio
    async def test_citations_from_response_with_web_search_call(self, provider):
        json_text = '{"classification": "bullish", "confidence": 80, "reasoning": "Positive outlook"}'
        annotations = [
            _make_annotation("url_citation", url="https://news.com/a", title="News A"),
        ]
        mock_response = _build_response_with_search(json_text, annotations)
        provider._client.responses.create = AsyncMock(return_value=mock_response)

        result = await provider.fetch_sentiment("NVDA")

        assert len(result.citations) == 1
        assert result.citations[0] == {"url": "https://news.com/a", "title": "News A"}

    @pytest.mark.asyncio
    async def test_no_error_when_annotations_attr_missing(self, provider):
        """Content blocks without annotations attribute should not cause errors."""
        json_text = '{"classification": "neutral", "confidence": 50, "reasoning": "Quiet day"}'
        # Block with no annotations attribute at all
        block = SimpleNamespace(text=json_text)
        message_item = SimpleNamespace(type="message", content=[block])
        mock_response = SimpleNamespace(output=[message_item])
        provider._client.responses.create = AsyncMock(return_value=mock_response)

        result = await provider.fetch_sentiment("AMD")

        assert result.citations == []
        assert result.reasoning == "Quiet day"