import os

import pymssql
import threading
import time
from .Process_Client import *


class database(ProcessClient):
    def __init__(self):
        ProcessClient.__init__(self)
        self.database_server = 'localhost'
        self.database_user = 'Chat'
        self.database_password = '123456'
        self.database_port = 8972
        self.database_name = 'Chat'
        self.database_state = False
        self.database_conn = None
        self.database_cursor = None

        current_file_path = __file__
        current_file_name = os.path.basename(current_file_path).split('.')[0]
        self.Process_client_send("Server", "Name", current_file_name)

        self.link_database_thread = threading.Thread(target=self.link_database)
        self.link_database_thread.start()

        # 创建一个互斥锁对象
        self.lock = threading.Lock()

    def link_database(self):
        while not self.database_state:
            time.sleep(1)
            try:
                self.database_conn = pymssql.connect(server=self.database_server,
                                                     user=self.database_user,
                                                     password=self.database_password,
                                                     port=self.database_port,
                                                     database=self.database_name)
                self.database_cursor = self.database_conn.cursor()
                self.database_state = True
            except pymssql.Error as a:
                print(a)

    def check_account_state(self, Id: int, password):
        if self.database_state:
            try:
                self.database_cursor.execute(f"select Id,Password from Account where Id = {Id}")
                request_data = self.database_cursor.fetchall()
                if len(request_data) != 0:
                    if request_data[0][1] == password:
                        return 0
                    else:
                        return 1
                else:
                    return 2
            except pymssql as a:
                self.database_state = False
                print(a)

    def sign_account(self, NetName, Password):
        if self.database_state:
            # 获取锁
            self.lock.acquire()
            try:
                self.database_cursor.execute("insert into Account(NetName, Password)"
                                             f"values ('{NetName}','{Password}')")
                self.database_conn.commit()
                self.database_cursor.execute(f"SELECT SCOPE_IDENTITY() AS LastInsertedId;")
                Id = self.database_cursor.fetchone()[0]
                # 释放锁
                self.lock.release()
                return {"Id": int(Id), "NetName": NetName, "Password": Password}
            except pymssql as a:
                self.lock.release()
                self.database_state = False
                return False

    def alter_state_database(self, Id: int, sate):
        if self.database_state:
            try:
                self.database_cursor.execute(f"update Account set State = N'{sate}' where Id = {Id}")
                self.database_conn.commit()
            except pymssql as a:
                self.database_state = False
                print(a)

    def Process_client_pick(self, data):
        if data['target'] in ['ALL', 'Database_formula']:
            match data['function']:
                case 'check_account_state':
                    client_id = data['content']['client_id']
                    account = data['content']['account']
                    password = data['content']['password']

                    status = self.check_account_state(account, password)
                    content = {"account": account, "status": status}
                    content = {"client_id": client_id, "target": "客户端", "genre": "登录", "data": content}

                    self.Process_client_send('Session_client', 'send_client', content)

                case 'sign_account':
                    client_id = data['content']['client_id']
                    account = data['content']['account']
                    password = data['content']['password']

                    info = self.sign_account(account, password)
                    content = {"client_id": client_id, "target": "客户端", "genre": "注册", "data": info}
                    self.Process_client_send('Session_client', 'send_client', content)

                case 'alter_state_database':
                    self.alter_state_database(data['content']['Id'], data['content']['sate'])


    def detection_data(self,date):
        if date is None:
            self.database_cursor.execute(f"update Account set State = N'{sate}' where Id = {Id}")