import csv
import time
from hil_lib import SCD30_HIL_Lib

# Device paths from your environment
EMULATOR = '/dev/i2c_emulator'
TARGET = '/dev/esp_sensor_test'
LOG_FILE = 'hil_validation_results.csv'

# Initialize HIL
hil = SCD30_HIL_Lib(EMULATOR, TARGET)

print(f"--- SCD30 HIL Test Started ---")
print(f"Logging to: {LOG_FILE}")

with open(LOG_FILE, mode='w', newline='') as f:
    writer = csv.writer(f)
    writer.writerow(["Timestamp", "Simulated_CO2", "Target_Received_Msg", "Status"])

    # Test cases: varying CO2 levels
    test_points = [400.0, 850.5, 1200.0, 2500.0, 5000.0]

    try:
        for co2 in test_points:
            print(f"\n[PHASE] Setting Simulated CO2 to {co2} ppm")
            
            # 1. Feed the bridge until the Target performs a successful Read
            # We loop briefly to wait for the Target's polling interval
            timeout = time.time() + 10 
            data_served = False
            while time.time() < timeout:
                if hil.process_bridge(co2, 24.0, 50.0):
                    data_served = True
                    break
            
            if not data_served:
                print("Error: Target didn't request data within 10s.")
                continue

            # 2. Capture what the Target actually saw
            # Wait for Target to print the result to Serial
            time.sleep(0.5) 
            target_msg = hil.get_target_reading()
            
            # 3. Simple Validation
            status = "PASS" if str(int(co2)) in target_msg else "CHECK"
            
            print(f"[RESULT] Target Output: {target_msg}")
            writer.writerow([time.strftime("%H:%M:%S"), co2, target_msg, status])
            f.flush()

    except KeyboardInterrupt:
        print("\nTest Aborted.")
    finally:
        hil.close()
        print("--- HIL Terminated ---")