'''
  ____    _    ____      _    
 / ___|  / \  |  _ \    / \   
 \___ \ / _ \ | |_) |  / _ \  
  ___) / ___ \|  _ <  / ___ \ 
 |____/_/   \_\_| \_\/_/   \_\
                              
Script that starts at the boot of the RPI (with cron)

@reboot sleep 30 && /usr/bin/python3 /var/www/nebuleair_pro_4g/SARA/reboot/start.py >> /var/www/nebuleair_pro_4g/logs/app.log 2>&1

/usr/bin/python3 /var/www/nebuleair_pro_4g/SARA/reboot/start.py

'''
import serial
import time
import sys
import json
import re

#get data from config
def load_config(config_file):
    try:
        with open(config_file, 'r') as file:
            config_data = json.load(file)
        return config_data
    except Exception as e:
        print(f"Error loading config file: {e}")
        return {}

#Fonction pour mettre à jour le JSON de configuration
def update_json_key(file_path, key, value):
    """
    Updates a specific key in a JSON file with a new value.

    :param file_path: Path to the JSON file.
    :param key: The key to update in the JSON file.
    :param value: The new value to assign to the key.
    """
    try:
        # Load the existing data
        with open(file_path, "r") as file:
            data = json.load(file)
        
        # Check if the key exists in the JSON file
        if key in data:
            data[key] = value  # Update the key with the new value
        else:
            print(f"Key '{key}' not found in the JSON file.")
            return
        
        # Write the updated data back to the file
        with open(file_path, "w") as file:
            json.dump(data, file, indent=2)  # Use indent for pretty printing
        
        print(f"💾 updating '{key}' to '{value}'.")
    except Exception as e:
        print(f"Error updating the JSON file: {e}")

# Define the config file path
config_file = '/var/www/nebuleair_pro_4g/config.json'
# Load the configuration data
config = load_config(config_file)
baudrate = config.get('SaraR4_baudrate', 115200)       #baudrate du sara R4
device_id = config.get('deviceID', '').upper()         #device ID en maj

ser_sara = serial.Serial(
    port='/dev/ttyAMA2',
    baudrate=baudrate, #115200 ou 9600
    parity=serial.PARITY_NONE, #PARITY_NONE, PARITY_EVEN or PARITY_ODD
    stopbits=serial.STOPBITS_ONE,
    bytesize=serial.EIGHTBITS,
    timeout = 2
)

def read_complete_response(serial_connection, timeout=2, end_of_response_timeout=2, wait_for_lines=None, debug=True):
    '''
    Fonction très importante !!!
    Reads the complete response from a serial connection and waits for specific lines.
    '''
    if wait_for_lines is None:
        wait_for_lines = []  # Default to an empty list if not provided

    response = bytearray()
    serial_connection.timeout = timeout
    end_time = time.time() + end_of_response_timeout
    start_time = time.time()

    while True:
        elapsed_time = time.time() - start_time  # Time since function start
        if serial_connection.in_waiting > 0:
            data = serial_connection.read(serial_connection.in_waiting)
            response.extend(data)
            end_time = time.time() + end_of_response_timeout  # Reset timeout on new data

            # Decode and check for any target line
            decoded_response = response.decode('utf-8', errors='replace')
            for target_line in wait_for_lines:
                if target_line in decoded_response:
                    if debug:
                        print(f"[DEBUG] 🔎 Found target line: {target_line} (in {elapsed_time:.2f}s)")
                    return decoded_response  # Return response immediately if a target line is found
        elif time.time() > end_time:
            if debug:
                print(f"[DEBUG] Timeout reached. No more data received.")
            break
        time.sleep(0.1)  # Short sleep to prevent busy waiting

    # Final response and debug output
    total_elapsed_time = time.time() - start_time
    if debug:
        print(f"[DEBUG] ⏱️ elapsed time: {total_elapsed_time:.2f}s. ⏱️")
    # Check if the elapsed time exceeded 10 seconds
    if total_elapsed_time > 10 and debug:
        print(f"[ALERT] 🚨 The operation took too long 🚨")
        print(f'<span style="color: red;font-weight: bold;">[ALERT] ⚠️{total_elapsed_time:.2f}s⚠️</span>')

    return response.decode('utf-8', errors='replace')  # Return the full response if no target line is found

try:
    print('<h3>Start reboot python script</h3>')

    #check modem status
    print("⚙️Check SARA Status")
    command = f'ATI\r'
    ser_sara.write(command.encode('utf-8'))
    response_SARA_ATI = read_complete_response(ser_sara, wait_for_lines=["IMEI"])
    print(response_SARA_ATI)
    match = re.search(r"Model:\s*(.+)", response_SARA_ATI)
    model = match.group(1).strip() if match else "Unknown"  # Strip unwanted characters
    print(f" Model: {model}")
    update_json_key(config_file, "modem_version", model)
    time.sleep(1)
    

    # 1. Set AIRCARTO URL
    print('➡️Set aircarto URL')
    aircarto_profile_id = 0
    aircarto_url="data.nebuleair.fr"
    command = f'AT+UHTTP={aircarto_profile_id},1,"{aircarto_url}"\r'
    ser_sara.write(command.encode('utf-8'))
    response_SARA_1 = read_complete_response(ser_sara, wait_for_lines=["OK"])
    print(response_SARA_1)
    time.sleep(1)

    #2. Set uSpot URL
    print('➡️Set uSpot URL')
    uSpot_profile_id = 1
    uSpot_url="api-prod.uspot.probesys.net"
    command = f'AT+UHTTP={uSpot_profile_id},1,"{uSpot_url}"\r'
    ser_sara.write(command.encode('utf-8'))
    response_SARA_2 = read_complete_response(ser_sara, wait_for_lines=["OK"])
    print(response_SARA_2)
    time.sleep(1)

    print("set port 81")
    command = f'AT+UHTTP={uSpot_profile_id},5,81\r'
    ser_sara.write((command + '\r').encode('utf-8'))
    response_SARA_55 = read_complete_response(ser_sara, wait_for_lines=["OK"])
    print(response_SARA_55)
    time.sleep(1)

    #3. Get localisation (CellLocate)
    mode = 2
    sensor = 2 
    response_type = 0
    timeout_s = 2
    accuracy_m = 1
    command = f'AT+ULOC={mode},{sensor},{response_type},{timeout_s},{accuracy_m}\r'
    ser_sara.write((command + '\r').encode('utf-8'))
    response_SARA_3 = read_complete_response(ser_sara, wait_for_lines=["+UULOC"])
    print(response_SARA_3)

    match = re.search(r"\+UULOC: \d{2}/\d{2}/\d{4},\d{2}:\d{2}:\d{2}\.\d{3},([-+]?\d+\.\d+),([-+]?\d+\.\d+)", response_SARA_3)
    if match:
        latitude = match.group(1)
        longitude = match.group(2)
        print(f"📍 Latitude: {latitude}, Longitude: {longitude}")
    else:
        print("❌ Failed to extract coordinates.")

    #update config.json
    update_json_key(config_file, "latitude_raw", float(latitude))
    update_json_key(config_file, "longitude_raw", float(longitude))

    time.sleep(1)

except Exception as e:
    print("An error occurred:", e)
    traceback.print_exc()  # This prints the full traceback