import sys
from pathlib import Path

import pytest
from mcp.server.mcpserver import Image

sys.path.insert(0, str(Path(__file__).resolve().parents[1]))

import server  # noqa: E402


def _fake_attachment(monkeypatch, **fields):
    attachment = {
        "id": "a1",
        "name": "f",
        "kind": "file",
        "mime": None,
        "size": 0,
        "date": None,
        "url": "https://trello.com/1/x",
        **fields,
    }

    async def fake_get_attachment(card_id, attachment_id):
        return dict(attachment)

    monkeypatch.setattr(server.trello, "get_attachment", fake_get_attachment)


@pytest.mark.asyncio
async def test_png_returned_as_image(monkeypatch):
    _fake_attachment(monkeypatch, kind="image", mime="image/png", data=b"\x89PNG", path="/tmp/x.png")

    meta, image = await server.trello_get_attachment("card1", "a1")

    assert isinstance(image, Image)
    assert "data" not in meta and meta["path"] == "/tmp/x.png"


@pytest.mark.asyncio
async def test_svg_only_path(monkeypatch):
    _fake_attachment(monkeypatch, kind="image", mime="image/svg+xml", data=b"<svg/>", path="/tmp/x.svg")

    result = await server.trello_get_attachment("card1", "a1")

    assert isinstance(result, dict) and result["path"] == "/tmp/x.svg"


@pytest.mark.asyncio
async def test_small_text_file_inlined(monkeypatch):
    _fake_attachment(monkeypatch, mime="text/plain", data="ошибка 500".encode(), path="/tmp/x.txt")

    result = await server.trello_get_attachment("card1", "a1")

    assert result["text"] == "ошибка 500"


@pytest.mark.asyncio
async def test_pdf_only_path(monkeypatch):
    _fake_attachment(monkeypatch, mime="application/pdf", data=b"%PDF", path="/tmp/x.pdf")

    result = await server.trello_get_attachment("card1", "a1")

    assert "text" not in result and "data" not in result


@pytest.mark.asyncio
async def test_linked_card_fetched(monkeypatch):
    _fake_attachment(monkeypatch, kind="card", url="https://trello.com/c/zzz/1-x")

    async def fake_get_card(url):
        return {"id": "linked", "url": url}

    monkeypatch.setattr(server.trello, "get_card", fake_get_card)

    result = await server.trello_get_attachment("card1", "a1")

    assert result["card"] == {"id": "linked", "url": "https://trello.com/c/zzz/1-x"}