import mysql.connector
from mysql.connector import Error
from tkinter import messagebox
from Car import Car

class ParkManage:
    def __init__(self, host="localhost", user="root", password="root", database="sys", user_gui=None):
        """初始化数据库连接"""
        self.conn = mysql.connector.connect(
            host="localhost",
            user="root",
            password="root",
            database="sys"
        )
        self.cursor = self.conn.cursor()
        self.create_tables()
        self.user_gui = user_gui  # 添加一个可选参数用于Tkinter根窗口

    def create_tables(self):
        """创建必要的数据库表"""
        try:
            self.cursor.execute("""
                CREATE TABLE IF NOT EXISTS parked_cars (
                    id INT AUTO_INCREMENT PRIMARY KEY,
                    license_plate VARCHAR(255) NOT NULL UNIQUE,
                    parked_time TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
                    picked_up_time TIMESTAMP NULL
                );
            """)
            self.conn.commit()
        except Error as e:
            messagebox.showerror("数据库错误", f"创建表失败: {e}")

    def park(self, license_plate):
        """处理停车逻辑并存储到数据库"""
        try:
            query = "INSERT INTO parked_cars (license_plate) VALUES (%s)"
            values = (license_plate,)
            self.cursor.execute(query, values)
            self.conn.commit()
            return True
        except mysql.connector.IntegrityError:  # 车牌号已存在
            return False
        except Error as e:
            messagebox.showerror("数据库错误", f"停车操作时发生错误: {e}")
            return False

    def pickup(self, license_plate):
        """处理取车逻辑，更新数据库记录"""
        try:
            # 更新取车时间
            query = "UPDATE parked_cars SET picked_up_time = CURRENT_TIMESTAMP WHERE license_plate = %s AND picked_up_time IS NULL"
            values = (license_plate,)
            self.cursor.execute(query, values)
            if self.cursor.rowcount > 0:
                self.conn.commit()
                return True
            else:
                messagebox.showinfo("取车失败", f"车牌号{license_plate}的车辆未找到或已取走。")
                return False
        except Error as e:
            messagebox.showerror("数据库错误", f"取车操作时发生错误: {e}")
            return False

    # 其他方法如查询、编辑、统计等可以根据需要类似地实现
    def query_car_info(self, license_plate):
        """根据车牌号查询车辆停放信息"""
        try:
            query = """
                 SELECT 
                     license_plate, 
                     parked_time, 
                     picked_up_time
                 FROM 
                     parked_cars
                 WHERE 
                     license_plate = %s
             """
            values = (license_plate,)
            self.cursor.execute(query, values)
            car_info = self.cursor.fetchone()

            if car_info:
                # 格式化输出信息
                parked_time_str = car_info[1].strftime('%Y-%m-%d %H:%M:%S')
                picked_up_time_str = "尚未取车" if car_info[2] is None else car_info[2].strftime('%Y-%m-%d %H:%M:%S')
                message = f"车牌号: {car_info[0]}\n停放时间: {parked_time_str}\n取车时间: {picked_up_time_str}"
                messagebox.showinfo("车辆信息", message)
            else:
                messagebox.showinfo("查询结果", "未找到该车牌号的车辆信息。")
        except Error as e:
            messagebox.showerror("查询错误", f"查询车辆信息时发生错误: {e}")

    def display_all_cars_info(self):
        """显示所有车辆的停放信息"""
        try:
            query = """
                SELECT 
                    license_plate, 
                    parked_time, 
                    picked_up_time
                FROM 
                    parked_cars
            """
            self.cursor.execute(query)
            car_info = self.cursor.fetchall()

            if car_info:
                # 遍历所有车辆信息并格式化输出
                all_cars_message = "\n\n".join([
                    f"车牌号: {car[0]}\n"
                    f"停放时间: {car[1].strftime('%Y-%m-%d %H:%M:%S')}\n"
                    f"取车时间: {'未取车' if car[2] is None else car[2].strftime('%Y-%m-%d %H:%M:%S')}"
                    for car in car_info
                ])
                messagebox.showinfo("所有车辆信息", all_cars_message)
            else:
                messagebox.showinfo("信息提示", "当前停车场内没有车辆信息。")
        except Error as e:
            messagebox.showerror("显示错误", f"显示所有车辆信息时发生错误: {e}")


    def count_parked_cars(self):
                """统计当前停在停车场的车辆总数"""
                query = "SELECT COUNT(*) FROM parked_cars"
                self.cursor.execute(query)
                parked_count = self.cursor.fetchone()[0]
                return parked_count

    def count_empty_slots(self, total_slots):
                """计算空闲车位数"""
                parked_count = self.count_parked_cars()
                empty_slots = total_slots - parked_count
                return empty_slots

    def most_frequent_parking_time(self):
        """
        分析并返回最频繁的停车时段。
        这里简化处理，实际应用中可能需要更复杂的SQL查询来统计时段。
        """
        query = """
        SELECT 
            HOUR(parked_time) AS hour, 
            COUNT(*) AS frequency
        FROM parked_cars
        GROUP BY hour
        ORDER BY frequency DESC
        LIMIT 1
        """
        self.cursor.execute(query)
        most_frequent_hour, _ = self.cursor.fetchone()
        return f"最频繁的停车时段是第{most_frequent_hour}小时"


    def close_connection(self):
        """关闭数据库连接"""
        if self.conn.is_connected():
            self.cursor.close()
            self.conn.close()