import json
import tempfile
import os
import pytest
from pathlib import Path

import src.sensor_logging.main as main


def test_sensor_data_to_json_structure():
    s = main.SensorData(voltage=123.4, temperature=22.1, humidity=55.2)
    data = s.to_json()
    assert isinstance(data, dict)
    assert set(data.keys()) == {"timestamp", "voltage", "temperature", "humidity"}
    assert isinstance(data["timestamp"], str)
    assert data["voltage"] == pytest.approx(123.4)
    assert data["temperature"] == pytest.approx(22.1)
    assert data["humidity"] == pytest.approx(55.2)


def test_log_sensor_data_creates_file_and_appends():
    with tempfile.TemporaryDirectory() as tmpdir:
        logfile = Path(tmpdir) / "sensor_log.json"

        # First log entry
        main.log_sensor_data(1.0, 2.0, 3.0)
        # Override output path temporarily
        orig_path = getattr(main, "DEFAULT_OUTPUT_PATH", None)
        try:
            main.DEFAULT_OUTPUT_PATH = logfile
            main.log_sensor_data(4.5, 6.7, 8.9)
        finally:
            if orig_path is not None:
                main.DEFAULT_OUTPUT_PATH = orig_path

        assert logfile.exists()
        content = logfile.read_text().strip().splitlines()
        # Assuming each line is separate JSON object
        parsed = [json.loads(line) for line in content]
        assert len(parsed) >= 1
        for p in parsed:
            assert set(p.keys()) == {"timestamp", "voltage", "temperature", "humidity"}
            assert isinstance(p["voltage"], (int, float))


def test_log_sensor_data_invalid_inputs_raises(tmp_path):
    # Invalid voltage type
    with pytest.raises((TypeError, ValueError)):
        main.log_sensor_data("bad", 25.0, 40.0)

    with pytest.raises((TypeError, ValueError)):
        main.log_sensor_data(2.0, None, 50.0)


def test_sensor_data_timestamp_format():
    s = main.SensorData(voltage=2.2, temperature=3.3, humidity=4.4)
    t = s.to_json()["timestamp"]
    # Basic ISO8601 pattern validation
    assert "T" in t and t.endswith("Z")