import pytest
from unittest.mock import AsyncMock


SAMPLE_TRIPLES_JSON = '''[
  {
    "subject": "变压器",
    "predicate": "额定电压",
    "object": "110kV",
    "source_snippet": "该变压器额定电压为110kV",
    "source_offset": {"start": 0, "end": 12}
  }
]'''


def test_text_extract_returns_200(client, mock_llm, mock_storage):
    mock_storage.download_bytes = AsyncMock(return_value=b"some text content")
    mock_llm.chat = AsyncMock(return_value=SAMPLE_TRIPLES_JSON)

    resp = client.post(
        "/api/v1/text/extract",
        json={"file_path": "text/test.txt", "file_name": "test.txt"},
    )
    assert resp.status_code == 200
    data = resp.json()
    assert "items" in data
    assert data["items"][0]["subject"] == "变压器"
    assert data["items"][0]["source_offset"]["start"] == 0


def test_text_extract_unsupported_format_returns_400(client, mock_storage):
    mock_storage.download_bytes = AsyncMock(return_value=b"data")

    resp = client.post(
        "/api/v1/text/extract",
        json={"file_path": "text/test.xlsx", "file_name": "data.xlsx"},
    )
    assert resp.status_code == 400
    assert resp.json()["code"] == "UNSUPPORTED_FILE_TYPE"


def test_text_extract_storage_error_returns_502(client, mock_llm, mock_storage):
    from app.core.exceptions import StorageError
    mock_storage.download_bytes = AsyncMock(side_effect=StorageError("RustFS unreachable"))

    resp = client.post(
        "/api/v1/text/extract",
        json={"file_path": "text/test.txt", "file_name": "test.txt"},
    )
    assert resp.status_code == 502
    assert resp.json()["code"] == "STORAGE_ERROR"


def test_text_extract_llm_parse_error_returns_502(client, mock_llm, mock_storage):
    mock_storage.download_bytes = AsyncMock(return_value=b"content")
    mock_llm.chat = AsyncMock(return_value="not json {{{{")

    resp = client.post(
        "/api/v1/text/extract",
        json={"file_path": "text/test.txt", "file_name": "test.txt"},
    )
    assert resp.status_code == 502
    assert resp.json()["code"] == "LLM_PARSE_ERROR"