"""
pytest configuration: isolate each test with a temporary data directory.
"""
import os
import json
import pytest
import tempfile
import shutil
from pathlib import Path
from fastapi.testclient import TestClient


@pytest.fixture(autouse=True)
def isolated_data_dir(monkeypatch, tmp_path):
    """Each test gets its own clean data directory."""
    data_dir = tmp_path / "data"
    (data_dir / "uploads").mkdir(parents=True)
    (data_dir / "metadata").mkdir(parents=True)
    (data_dir / "topics.json").write_text(json.dumps({"topics": []}))

    from config import DEFAULT_SETTINGS
    (data_dir / "settings.json").write_text(json.dumps(DEFAULT_SETTINGS))

    monkeypatch.setenv("DATA_DIR", str(data_dir))

    # Patch the module-level path constants so the running app sees the temp dir
    import config
    monkeypatch.setattr(config, "DATA_DIR", data_dir)
    monkeypatch.setattr(config, "UPLOADS_DIR", data_dir / "uploads")
    monkeypatch.setattr(config, "METADATA_DIR", data_dir / "metadata")
    monkeypatch.setattr(config, "TOPICS_FILE", data_dir / "topics.json")
    monkeypatch.setattr(config, "SETTINGS_FILE", data_dir / "settings.json")

    import services.storage as st
    from filelock import FileLock
    monkeypatch.setattr(st, "UPLOADS_DIR", data_dir / "uploads")
    monkeypatch.setattr(st, "METADATA_DIR", data_dir / "metadata")
    monkeypatch.setattr(st, "TOPICS_FILE", data_dir / "topics.json")
    monkeypatch.setattr(st, "SETTINGS_FILE", data_dir / "settings.json")
    monkeypatch.setattr(st, "_topics_lock", FileLock(str(data_dir / "topics.json") + ".lock"))
    monkeypatch.setattr(st, "_settings_lock", FileLock(str(data_dir / "settings.json") + ".lock"))

    yield data_dir


@pytest.fixture
def client(isolated_data_dir):
    from main import app
    with TestClient(app) as c:
        yield c


@pytest.fixture
def sample_txt(tmp_path):
    p = tmp_path / "sample.txt"
    p.write_text("This is a test document about invoices and finance.")
    return p


@pytest.fixture
def sample_pdf(tmp_path):
    """Create a minimal valid PDF for testing."""
    import fitz
    doc = fitz.open()
    page = doc.new_page()
    page.insert_text((50, 50), "Test PDF document about contracts and legal matters.")
    pdf_path = tmp_path / "sample.pdf"
    doc.save(str(pdf_path))
    doc.close()
    return pdf_path