export const formatDateTime = (date = new Date()) => {
  // 确保传入的是 Date 对象
  if (!(date instanceof Date)) {
    date = new Date(date);
  }
  
  // 提取日期时间各部分
  const year = date.getFullYear();
  const month = String(date.getMonth() + 1).padStart(2, '0');
  const day = String(date.getDate()).padStart(2, '0');
  const hours = String(date.getHours()).padStart(2, '0');
  const minutes = String(date.getMinutes()).padStart(2, '0');
  const seconds = String(date.getSeconds()).padStart(2, '0');
  const milliseconds = String(date.getMilliseconds()).padStart(3, '0');
  const timezoneOffset = -date.getTimezoneOffset();
  const timezoneHours = String(Math.floor(Math.abs(timezoneOffset) / 60)).padStart(2, '0');
  const timezoneMinutes = String(Math.abs(timezoneOffset) % 60).padStart(2, '0');
  const timezoneSign = timezoneOffset >= 0 ? '+' : '-';

  return `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`;
}

export const getTimeDifference = (time1, time2) => {
    // 将时间字符串转换为 Date 对象
    const date1 = new Date(time1);
    const date2 = new Date(time2);
    
    // 计算时间差（毫秒）
    const diffMs = Math.abs(date2 - date1);
    
    // 转换为分钟
    const diffMinutes = Math.floor(diffMs / (1000 * 60));
    
    // 计算小时和分钟
    const hours = Math.floor(diffMinutes / 60);
    const minutes = diffMinutes % 60;
    
    // 确定时间差的方向
    const direction = date2 > date1 ? "之后" : "之前";
    
    return {
        hours,
        minutes,
        totalMinutes: diffMinutes,
        direction
    };
}

/**
 * 比较两个时间字符串（格式：HH:MM）
 * @param {string} time1 - 第一个时间字符串，如 "14:00"
 * @param {string} time2 - 第二个时间字符串，如 "15:00"
 * @returns {number} 
 *   -1: time1 在 time2 之前
 *    0: time1 等于 time2
 *    1: time1 在 time2 之后
 * @throws {Error} 如果时间格式无效
 */
export function compareTimes(time1, time2) {
  // 验证时间格式
  const timeRegex = /^([01]?[0-9]|2[0-3]):([0-5][0-9])$/;
  
  if (!timeRegex.test(time1) || !timeRegex.test(time2)) {
    throw new Error('时间格式无效，请使用 HH:MM 格式（24小时制）');
  }
  
  // 将时间字符串转换为分钟数进行比较
  const timeToMinutes = (time) => {
    const [hours, minutes] = time.split(':').map(Number);
    return hours * 60 + minutes;
  };
  
  const minutes1 = timeToMinutes(time1);
  const minutes2 = timeToMinutes(time2);
  
  if (minutes1 < minutes2) return 1;
  if (minutes1 > minutes2) return -1;
  return 0;
}


// 数字转16进制字符串
export const numberToHex = (number) => {
    return (number & 0xFF).toString(16).padStart(2, '0')
}

// 延迟执行
export const delay = (ms)  =>{
    return new Promise(resolve => setTimeout(resolve, ms));
}