'''
  ____    _    ____      _    
 / ___|  / \  |  _ \    / \   
 \___ \ / _ \ | |_) |  / _ \  
  ___) / ___ \|  _ <  / ___ \ 
 |____/_/   \_\_| \_\/_/   \_\
                              
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
    #Attention:
        # SARA R4 response: Manufacturer: u-blox Model: SARA-R410M-02B
        # SArA R5 response: SARA-R500S-01B-00
    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)

    # Check for SARA model with more robust regex
    model = "Unknown"
    if "SARA-R410M" in response_SARA_ATI:
        model = "SARA-R410M"
        print("📱 Detected SARA R4 modem")
    elif "SARA-R500" in response_SARA_ATI:
        model = "SARA-R500"
        print("📱 Detected SARA R5 modem")
    else:
        # Fallback to regex match if direct string match fails
        match = re.search(r"Model:\s*([A-Za-z0-9\-]+)", response_SARA_ATI)
        if match:
            model = match.group(1).strip()
        else:
            model = "Unknown"
            print("⚠️ Could not identify modem model")

    print(f"🔍 Model: {model}")
    update_json_key(config_file, "modem_version", model)
    time.sleep(1)
    

    # 1. Set AIRCARTO URL (profile id = 0)
    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 (profile id = 1)
    print('➡️Set uSpot URL')
    uSpot_profile_id = 1
    uSpot_url="api-prod.uspot.probesys.net"
    security_profile_id = 1

    #step 1: import the certificate
    print("****")
    certificate_name = "e6"
    with open("/var/www/nebuleair_pro_4g/SARA/SSL/certificate/e6.pem", "rb") as cert_file:
        certificate = cert_file.read()
    size_of_string = len(certificate)

    print("\033[0;33m Import certificate\033[0m")
    # AT+USECMNG=0,<type>,<internal_name>,<data_size>
    # type-> 0 -> trusted root CA
    command = f'AT+USECMNG=0,0,"{certificate_name}",{size_of_string}\r'
    ser_sara.write((command + '\r').encode('utf-8'))
    response_SARA_1 = read_complete_response(ser_sara)
    print(response_SARA_1)

    time.sleep(0.5)

    print("\033[0;33mAdd certificate\033[0m")
    ser_sara.write(certificate)
    response_SARA_2 = read_complete_response(ser_sara)
    print(response_SARA_2)

    time.sleep(0.5)

    # SECURITY PROFILE
        # op_code:  3 -> trusted root certificate internal name
    print("\033[0;33mSet the security profile (choose cert)\033[0m")
    command = f'AT+USECPRF={security_profile_id},3,"{certificate_name}"\r'
    ser_sara.write((command + '\r').encode('utf-8'))
    response_SARA_5c = read_complete_response(ser_sara, wait_for_lines=["OK"])
    print(response_SARA_5c)
    time.sleep(0.5)

    #step 4: set url (op_code = 1)
    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)

    #step 4: set PORT (op_code = 5)
    print("set port 443")
    command = f'AT+UHTTP={uSpot_profile_id},5,443\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)

     #step 4: set url to SSL (op_code = 6) (http_secure = 1 for HTTPS)(USECMNG_PROFILE = 2)
    print("\033[0;33mSET SSL\033[0m")
    http_secure = 1
    command = f'AT+UHTTP={uSpot_profile_id},6,{http_secure},{security_profile_id}\r'
    #command = f'AT+UHTTP={profile_id},6,{http_secure}\r'

    ser_sara.write(command.encode('utf-8'))
    response_SARA_5 = read_complete_response(ser_sara, wait_for_lines=["OK"])
    print(response_SARA_5)
    time.sleep(1)

    #3. Get localisation (CellLocate)
    mode = 2    #single shot position
    sensor = 2  #use cellular CellLocate® location information
    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