import subprocess
import requests
from lxml import html
from flask import Flask, request, jsonify
import json
import os
from datetime import datetime, timedelta

app = Flask(__name__)

def start_service():
    command = "systemctl start {{ service_control_name }}"
    try:
        # Run the command using subprocess.run()
        process = subprocess.Popen(command, shell=True)
        
    except subprocess.CalledProcessError as e:
        return {"Error": e.strip('\n')}

    command = "systemctl status {{ service_control_name }} | grep Active | cut -d ':' -f 2- | cut -b 2-"
    try:
        # Run the command using subprocess.run()
        result = subprocess.run(command, shell=True, check=True, capture_output=True, text=True)
        return {"Message": result.stdout.strip('\n')}
        
    except subprocess.CalledProcessError as e:
        return {"Error": e.strip('\n')}
        
def stop_service():
    command = "systemctl stop {{ service_control_name }}"
    try:
        # Run the command using subprocess.run()
        process = subprocess.Popen(command, shell=True)
        
    except subprocess.CalledProcessError as e:
        return {"Error": e.strip('\n')}

    command = "systemctl status {{ service_control_name }} | grep Active | cut -d ':' -f 2- | cut -b 2-"
    try:
        # Run the command using subprocess.run()
        result = subprocess.run(command, shell=True, check=True, capture_output=True, text=True)
        return {"Message": result.stdout.strip('\n')}        
    except subprocess.CalledProcessError as e:
        return {"Error": e.strip('\n')}

def service_status():
    command = "systemctl status {{ service_control_name }} | grep Active | cut -d ':' -f 2- | cut -b 2-"
    try:
        # Run the command using subprocess.run()
        result = subprocess.run(command, shell=True, check=True, capture_output=True, text=True)
        command = "systemctl status {{ service_control_name }} | grep Active | cut -d ':' -f 2 | cut -d ' ' -f 2"
        status = subprocess.run(command, shell=True, check=True, capture_output=True, text=True)
        if status.stdout.strip('\n') == "active":
            elapsed_time = check_time_elapsed(result.stdout.strip('\n'))
            times_up(elapsed_time)
        else:
            elapsed_time = -1
        return {"Elapsed_Time": elapsed_time, "Service Name": "{{ service_control_name }}", "Message": result.stdout.strip('\n'), "Status": status.stdout.strip('\n')}        
    except subprocess.CalledProcessError as e:
        return {"Error": e.strip('\n')}

def save_duration(new_duration):
    # this will be an integer from 0-3 for 
    # 30min, 1hr, 2hr, and 6rh respectively
    seconds = 1800
    if new_duration == "0":
        seconds = 1800
    if new_duration == "1":
        seconds = 3600
    if new_duration == "2":
        seconds = 7200
    if new_duration == "3":
        seconds = 21600

    info = { 
        "duration": new_duration,
        "seconds": seconds
    }
    with open("duration.json", "w") as file:
        json.dump(info, file, indent=4)
    return {"status": "duration.json stored"}

def get_duration():
    try:
        with open('duration.json', 'r') as file:
            data = json.load(file)
        return (data)
    except Exception as e:
        return {"error": str(e)}, 500

def check_time_elapsed(time_str):
    # Extract the time part from the string
    datetime_extract = time_str.split("since ")[1].split(";")[0]

    try:
        time_format = "%a %Y-%m-%d %H:%M:%S %Z"
        given_time = datetime.strptime(datetime_extract, time_format)
    except ValueError as e:
        raise ValueError(f"Error parsing the time string: {datetime_extract}" + str(e))
    
    # Get the current time
    now = datetime.now()
    
    # Calculate the difference in seconds
    delta = now - given_time
    total_seconds = int(delta.total_seconds())
    
    return total_seconds

def times_up(time_elapsed):
    duration_json = get_duration()
    stored_duration = duration_json["duration"]
    if stored_duration == 0:
        if time_elapsed > 1800:
            stop_service()
    elif stored_duration == 1:
        if time_elapsed > 3600:
            stop_service()
    elif stored_duration == 2:
        if time_elapsed > 7200:
            stop_service()
    elif stored_duration == 3:
        if time_elapsed > 21600:
            stop_service()



@app.route('/start', methods=['GET'])
def start():
    try:
        return jsonify(start_service())
    except ValueError as e:
        print(e)
        return jsonify({'error': e}), 400

@app.route('/stop', methods=['GET'])
def stop():
    try:
        return jsonify(stop_service())
    except ValueError as e:
        print(e)
        return jsonify({'error': e}), 400

@app.route('/status', methods=['GET'])
def status():
    try:
        return jsonify(service_status())
    except ValueError as e:
        print(e)
        return jsonify({'error': e}), 400

@app.route('/check_duration', methods=['GET'])
def check_duration():
    try:
        return jsonify(get_duration())
    except ValueError as e:
        print(e)
        return jsonify({'error': e}), 400

@app.route('/store_duration', methods=['GET'])
def store_duration():
    try:
        new_duration = request.args.get('new_duration')
    except ValueError as e:
            return jsonify({'error': e}), 400
    if new_duration:
        try:
            return jsonify(save_duration(new_duration))
        except ValueError as e:
            print(e)
            return jsonify({'error': e}), 400

@app.route('/test', methods=['GET'])
def test():
    return jsonify({'message': 'Hello there'})

if __name__ == '__main__':
    app.run(debug=True, host='0.0.0.0', port=5000)