import subprocess
import re
import os
import psutil
import signal
import time
import datetime
import json
from flask import Flask, render_template, request, redirect, url_for, make_response
import socket

import logging

logging.basicConfig(
    filename='app.log',  # 日志文件的名称
    filemode='a',        # 'a'代表追加模式，如果文件存在则追加内容
    level=logging.DEBUG,  # 日志级别，DEBUG是最低的级别，会记录所有级别的日志
    format='%(asctime)s - %(levelname)s - %(message)s'  # 日志的格式
)

try:
    from takway.board import OrangePi
    led_enabled = True
    orangepi = OrangePi()
except ImportError:
    led_enabled = False
    logging.info("Error importing OrangePi")

# blue: APP
# red: hotspot

def network_error_light_1():
    error_time = datetime.datetime.now()
    while led_enabled:
        orangepi.set_led_off('blue')
        orangepi.set_led_on('red')
        time.sleep(0.25)
        orangepi.set_led_on('blue')
        orangepi.set_led_off('red')
        time.sleep(0.25)
        if error_time + datetime.timedelta(seconds=2) < datetime.datetime.now():
            break
    # close_app()

def network_error_light_2():
    error_time = datetime.datetime.now()
    while led_enabled:
        orangepi.set_led_on('green')
        time.sleep(0.25)
        orangepi.set_led_off('green')
        time.sleep(0.25)
        if error_time + datetime.timedelta(seconds=2) < datetime.datetime.now():
            break
    # close_app()

def edit_line_in_file(file_path, search_string, replacement_string):
    edit = False
    try:
        # 读取文件内容
        with open(file_path, 'r') as file:
            lines = file.readlines()

        # 替换包含特定内容的行
        with open(file_path, 'r+') as file:
            file.seek(0)  # 移动到文件开头
            file.truncate()  # 清空文件内容
            for line in lines:
                if search_string in line:
                    file.write(replacement_string + '\n')
                    edit = True
                else:
                    file.write(line)
        logging.info(f"{datetime.datetime.now()}: The line has been edited.")
        return edit
    except FileNotFoundError:
        logging.info(f"The file {file_path} does not exist.")
        return edit
    except IOError as e:
        logging.info(f"An error occurred: {e}")
        return edit

# 获取私有IP地址
def save_local_ip():
    try:
        s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
        s.connect(("8.8.8.8", 80))
        local_ip = s.getsockname()[0]
        s.close()
        # save local_ip to file
        with open('local_ip.txt', 'w') as f:
            f.write(local_ip)
        logging.info(f"{datetime.datetime.now()}: Local IP address: {local_ip}")
        return local_ip
    except Exception as e:
        logging.info(f"Error getting private IP: {e}")
        return None

app = Flask(__name__)

def close_app():
    if led_enabled:
        orangepi.set_led_off('blue')

    # 保存Wi-Fi IP地址
    save_local_ip()
    
    # 获取当前Flask应用程序的进程ID
    flask_pid = os.getpid()

    # 获取所有名为'python3'的进程ID
    python_pids = [p.info['pid'] for p in psutil.process_iter(attrs=['pid', 'name']) if p.info['name'] == 'python3']

    # 关闭Flask应用程序进程
    os.kill(flask_pid, signal.SIGTERM)

    # 关闭Python进程
    for pid in python_pids:
        os.kill(pid, signal.SIGTERM)

def start_hotspot():
    try:
        subprocess.Popen('sudo systemctl start hotspot.service', shell=True)
        if led_enabled:
            orangepi.set_led_on('red')
    except subprocess.CalledProcessError as e:
        logging.info(f"{datetime.datetime.now()}: Error starting create_ap service: {e}")

def close_hotspot():
    # 关闭热点
    try:
        subprocess.Popen('sudo systemctl stop hotspot.service', shell=True)
        logging.info(f"{datetime.datetime.now()}: Stopping create_ap service")
        if led_enabled:
            orangepi.set_led_off('red')
    except subprocess.CalledProcessError as e:
        logging.info(f"{datetime.datetime.now()}: Error stopping hotspot: {e}")


def init_networkmanager_file():
    file_path = '/etc/NetworkManager/NetworkManager.conf'
    search_string = 'unmanaged-devices=interface-name:'
    replacement_string = ''  # 如果不需要替换为其他内容，可以设置为空字符串
    if edit_line_in_file(file_path, search_string, replacement_string):
        '''
        # 从 /etc/NetworkManager/NetworkManager.conf 文件中移除或注释掉 [keyfile] 部分的 unmanaged-devices 条目，因为它可能阻止了 NetworkManager 管理 wlan0 接口。编辑文件如下：
        ```
        [keyfile]
        #unmanaged-devices=interface-name:ap0;interface-name:wlan0
        ```
        sudo systemctl restart NetworkManager
        '''
        # network_error_light_1()
        logging.info(f"{datetime.datetime.now()}: Wi-Fi NetworkManager Error: restart NetworkManager.")
        subprocess.Popen('sudo systemctl restart NetworkManager', shell=True)
        time.sleep(5)   # 不得修改该时间，保留足够长时间给NetworkManager重启完成，并连接以往WiFi。

# 检测 Wi-Fi 连接状态
def check_wifi_connection():
    cmd = "nmcli dev status"
    result = subprocess.run(cmd, shell=True, capture_output=True, text=True)
    output = result.stdout.strip()
    lines = output.split("\n")[1:]  # Skip the header line
    for line in lines:
        columns = line.split()
        logging.info(columns)
        '''
        ['wlan0', 'wifi', 'disconnected', '--']
        ['p2p-dev-wlan0', 'wifi-p2p', 'disconnected', '--']
        ['eth0', 'ethernet', 'unavailable', '--']
        ['lo', 'loopback', 'unmanaged', '--']
        '''
        if len(columns) >= 4 and columns[2] == "connected":
            wifi_ssid = columns[3]
            if led_enabled:
                orangepi.set_led_off('blue')
            return True, wifi_ssid
    return False, None

def scan_wifi():
    try:
        subprocess.run(['nmcli', 'dev', 'wifi', 'rescan'], check=True)
        cmd = "nmcli dev wifi"
        result = subprocess.run(cmd, shell=True, capture_output=True, text=True)
    except subprocess.CalledProcessError as e:
        logging.info(f"{datetime.datetime.now()}: Error scanning Wi-Fi: {e}")
        network_error_light_1()
        return []
    logging.info(f"{datetime.datetime.now()}: Wi-Fi scan complete...")
    ssid_list = []
    wifi_list = []
    output = result.stdout.strip()
    lines = output.split("\n")[1:]  # Skip the header line
    for line in lines:
        columns = line.split()
        '''
        logging.info(columns)
        for i, column in enumerate(columns):
            logging.info(f"{i}: {column}")
        '''
        # ['94:14:57:15:13:50', 'Meeting', 'MG', 'Infra', '1', '130', 'Mbit/s', '100', '****', 'WPA1', 'WPA2']

        # 提取MAC地址
        mac_address = columns[0]

        # 提取Wi-Fi名称
        wifi_name = []
        for i in range(1, len(columns)):
            if columns[i] == 'Infra':
                _wifi_name = ' '.join(columns[1:i])
                wifi_name.append(_wifi_name)
                columns = columns[i+1:]
                break
        ssid = wifi_name[0]
        if ':' in ssid:
            # 94:14:57:15:13:50 Meeting
            # 去除mac地址
            ssid = ssid.split(' ')[1:]
            ssid = ''.join(ssid)

        if ssid in ssid_list:
            continue
        ssid_list.append(ssid)

        # 提取强度
        strength = None
        for i in range(len(columns)):
            if columns[i] == 'Mbit/s':
                strength = columns[i+1]
                break
        # logging.info("MAC地址:", mac_address)
        # logging.info("Wi-Fi名称:", ssid)
        # logging.info("强度:", strength)

        wifi_list.append({'ssid': ssid, 'signal': strength, 'mac': mac_address})
        if len(wifi_list) == 15:
            break
    with open('scaned_wifi_list.json', 'w') as f:
        json.dump(wifi_list, f)
        logging.info(f"{datetime.datetime.now()}: Wi-Fi scaned list: {wifi_list}")
    

    return wifi_list

# 连接 Wi-Fi
def connect_wifi(ssid, password):
    # 连接到用户选择的 Wi-Fi 网络
    try:
        output = subprocess.check_output(['nmcli', 'dev', 'wifi', 'connect', ssid, 'password', password, 'autoconnect', 'yes'])
        output_str = output.decode('utf-8')  # 将输出转换为字符串
        if "successfully" in output_str:
            logging.info(f"{datetime.datetime.now()}: Successfully connected to Wi-Fi: {ssid}")
            save_wifi(ssid, password)  # 保存连接成功的Wi-Fi信息
            return True
        else:
            logging.info(f"{datetime.datetime.now()}: Error connecting to Wi-Fi: {output_str}")
            return False
    except subprocess.CalledProcessError as e:
        logging.info(f"{datetime.datetime.now()}: Error connecting to Wi-Fi: {e}")
        return False

# 关闭 Wi-Fi
def disconnect_wifi():
    try:
        output = subprocess.check_output(['nmcli', 'dev', 'disconnect', 'iface', 'wlan0'])
        output_str = output.decode('utf-8')  # 将输出转换为字符串
        if "successfully disconnected" in output_str:
            logging.info(f"{datetime.datetime.now()}: Wi-Fi disconnected successfully")
        else:
            logging.info(f"{datetime.datetime.now()}: Error disconnecting from Wi-Fi: {output_str}")
    except Exception as e:
        logging.info(f"{datetime.datetime.now()}: Error disconnecting from Wi-Fi: {e}")

def connect_saved_wifi(scaned_wifi_list):
    wifi_list = load_saved_wifi()
    if wifi_list == []:
        return False, None
    for wifi in wifi_list:
        if wifi['ssid'] in [item['ssid'] for item in scaned_wifi_list]:
            if connect_wifi(wifi['ssid'], wifi['password']):
                return True, wifi['ssid']
    return check_wifi_connection()
    

def load_saved_wifi():
    try:
        with open('wifi_list.json', 'r') as f:
            wifi_list = json.load(f)
        return wifi_list
    except:
        return []

def save_wifi(ssid, password):
    wifi_list = load_saved_wifi()
    if ssid not in [item['ssid'] for item in wifi_list]:
        wifi_list.append({'ssid': ssid, 'password': password})
    with open('wifi_list.json', 'w') as f:
        json.dump(wifi_list, f)


# 主页
@app.route('/')
def index():
    global wifi_list

    response = make_response(render_template('index.html', wifi_list=wifi_list))
    response.headers.set('Content-Type', 'text/html')
    response.headers.set('Apple-Web-App-Capable', 'yes')
    response.headers.set('Apple-Mobile-Web-App-Status-Bar-Style', 'black-translucent')
    return response

# 提交 Wi-Fi 信息
@app.route('/submit', methods=['POST'])
def submit():
    if led_enabled:
        orangepi.set_led_on('red')
    ssid = request.form['ssid']
    password = request.form['password']
    logging.info(f"{datetime.datetime.now()}: Connecting to Wi-Fi: {ssid} with password {password}")

    # 关闭热点
    close_hotspot()

    time.sleep(0.5)
    scan_wifi()
    time.sleep(0.5)
    
    # 连接到用户选择的 Wi-Fi 网络
    if connect_wifi(ssid, password):
        close_app()

    connected, wifi_ssid = check_wifi_connection()
    if not connected:
        logging.info(f"{datetime.datetime.now()}: Wi-Fi连接失败。")
        wifi_list = scan_wifi()
        start_hotspot()
    else:
        save_wifi(ssid, password)  # 保存连接成功的Wi-Fi信息

    return redirect(url_for('index'))


if __name__ == '__main__':
    debug_mode = False  # 设置为 True 以跳过 Wi-Fi 连接状态检测
    if debug_mode:
        disconnect_wifi()

    if led_enabled:
        orangepi.set_led_on('blue')

    init_networkmanager_file()  # 初始化 NetworkManager 配置文件
    
    connected, wifi_ssid = check_wifi_connection()
    if connected:
        logging.info(f"{datetime.datetime.now()}: 系统已自动连接到 Wi-Fi 网络，退出程序")
        close_app()
    
    # 扫描Wi-Fi
    wifi_list = scan_wifi()
    # 连接保存的Wi-Fi
    connected, wifi_ssid = connect_saved_wifi(wifi_list)
    if connected:
        logging.info(f"{datetime.datetime.now()}: 系统已自动连接到 Wi-Fi 网络 {wifi_ssid}，退出程序")
        close_app()
    
    logging.info(f"{datetime.datetime.now()}: 未连接到 Wi-Fi 网络, 开始热点模式")
    start_hotspot()
    app.run(host='0.0.0.0', port=80)