import re
from pathlib import Path

ROOT = Path(__file__).resolve().parents[1]
NODE = ROOT / "firmware" / "xiao-esp32c6-sensor-node"
def source(name): return (NODE / name).read_text()

def test_wiring_matches_assembly():
    config = source("sensor_node_config.h")
    expected = {"RS485_DE_PIN":"D2", "RS485_TX_PIN":"D4", "RS485_RX_PIN":"D5",
                "BNO086_SDA_PIN":"D7", "BNO086_SCL_PIN":"D8", "GPS_RX_PIN":"D9", "GPS_TX_PIN":"D10"}
    for name, pin in expected.items(): assert re.search(rf"#define\s+{name}\s+{pin}\b", config)

def test_transport_contract():
    text = source("rs485_transport.cpp")
    for token in ['doc["type"] = "sensor_status"', 'doc["schema_version"]', 'createNestedObject("imu")', 'createNestedObject("gps")', "serial.write('\\n')", "serial.flush()"]:
        assert token in text

def test_loop_is_non_blocking():
    loop = source("xiao-esp32c6-sensor-node.ino").split("void loop()", 1)[1]
    assert "updateGps" in loop and "updateImu" in loop and "TELEMETRY_INTERVAL_MS" in loop
    assert not re.search(r"delay\((?:[2-9]|[1-9]\d+)\)", loop)

def test_node_does_not_take_cargo_or_ble_authority():
    combined = "\n".join(p.read_text() for p in NODE.glob("*.*"))
    assert "NimBLE" not in combined and "JBD" not in combined and "server.on(" not in combined