# mysql数据库常用任务函数封装
import pymysql, socket, time
import config

# 获取新的任务
def get_task(task_type):
    try:
        with pymysql.connect(
            host=config.mysql_local['host'],
            port=config.mysql_local['port'],
            user=config.mysql_local['user'],
            password=config.mysql_local['password'],
            db=config.mysql_local['db'],
            charset=config.mysql_local['charset'],) as conn:
            cursor = conn.cursor()

            sql = f'select task_key from tasks where task_type = "{task_type}" and status = 0 order by priority desc, id asc limit 1'
            # print(f'sql: {sql}')
            cursor.execute(sql)
            data = cursor.fetchone()
            if data:
                return data[0]
            else:
                return ''
    except Exception as e:
        print(f"{time.strftime('%Y-%m-%d %H:%M:%S', time.localtime())} 执行get_task({task_type})异常: {str(e)}")
        return ''

# 新增新的任务
def add_task(data):
    try:
        with pymysql.connect(
            host=config.mysql_local['host'],
            port=config.mysql_local['port'],
            user=config.mysql_local['user'],
            password=config.mysql_local['password'],
            db=config.mysql_local['db'],
            charset=config.mysql_local['charset'],) as conn:
            cursor = conn.cursor() 

            #判断是否是昆山教学的,是的话优先级设置为默认
            if data["psid"] == 85:
                sql = f'insert into tasks (task_type, task_key) values ("{data["task_type"]}", "{data["task_key"]}")'
            else:
                sql = f'insert into tasks (task_type, task_key, priority) values ("{data["task_type"]}", "{data["task_key"]}", 1)'
            # print(f'sql: {sql}')
            cursor.execute(sql)
            conn.commit()
    except Exception as e:
        print(f"{time.strftime('%Y-%m-%d %H:%M:%S', time.localtime())} 执行add_task({data})异常: {str(e)}")
        
# 开始任务
def start_task(data):
    try:
        with pymysql.connect(
            host=config.mysql_local['host'],
            port=config.mysql_local['port'],
            user=config.mysql_local['user'],
            password=config.mysql_local['password'],
            db=config.mysql_local['db'],
            charset=config.mysql_local['charset'],) as conn:
            cursor = conn.cursor()

            hostname = socket.gethostname()
            sql = f'update tasks set status = 1, hostname = "{hostname}", started_at = now(), updated_at = now() where task_type = "{data["task_type"]}" and task_key = "{data["task_key"]}"'
            # print(f'sql: {sql}')
            cursor.execute(sql)
            conn.commit()
    except Exception as e:
        print(f"{time.strftime('%Y-%m-%d %H:%M:%S', time.localtime())} 执行start_task({data})异常: {str(e)}")

# 完成任务
def finish_task(data):
    try:
        with pymysql.connect(
            host=config.mysql_local['host'],
            port=config.mysql_local['port'],
            user=config.mysql_local['user'],
            password=config.mysql_local['password'],
            db=config.mysql_local['db'],
            charset=config.mysql_local['charset'],) as conn:
            cursor = conn.cursor()

            hostname = socket.gethostname()
            sql = f'update tasks set status = 2, hostname = "{hostname}", finished_at = now(), updated_at = now() where task_type = "{data["task_type"]}" and task_key = "{data["task_key"]}"'
            # print(f'sql: {sql}')
            cursor.execute(sql)
            conn.commit()
    except Exception as e:
        print(f"{time.strftime('%Y-%m-%d %H:%M:%S', time.localtime())} 执行finish_task({data})异常: {str(e)}")