package com.xiaoqu.watch.util

import java.text.SimpleDateFormat
import java.util.Calendar
import java.util.Date
import java.util.Locale

/**
 * 日期格式化工具
 * 对应旧版 commonUtil.js 的 getDateTime()
 */
object DateUtil {

    private val weekNames = arrayOf("周日", "周一", "周二", "周三", "周四", "周五", "周六")

    private val formatDateTime = SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.CHINA)
    private val formatDate = SimpleDateFormat("MM月dd日", Locale.CHINA)
    private val formatTime = SimpleDateFormat("HH:mm:ss", Locale.CHINA)
    private val formatTimeShort = SimpleDateFormat("HH:mm", Locale.CHINA)

    /** 完整日期时间：2026-04-24 20:15:30 */
    fun formatDateTime(timestamp: Long = System.currentTimeMillis()): String {
        return formatDateTime.format(Date(timestamp))
    }

    /** 月日：04月24日 */
    fun formatDate(timestamp: Long = System.currentTimeMillis()): String {
        return formatDate.format(Date(timestamp))
    }

    /** 时分秒：20:15:30 */
    fun formatTime(timestamp: Long = System.currentTimeMillis()): String {
        return formatTime.format(Date(timestamp))
    }

    /** 时分：20:15 */
    fun formatTimeShort(timestamp: Long = System.currentTimeMillis()): String {
        return formatTimeShort.format(Date(timestamp))
    }

    /** 星期：周四 */
    fun getWeekDay(timestamp: Long = System.currentTimeMillis()): String {
        val calendar = Calendar.getInstance()
        calendar.timeInMillis = timestamp
        return weekNames[calendar.get(Calendar.DAY_OF_WEEK) - 1]
    }

    /**
     * 获取完整日期信息（对应旧版 getDateTime() 返回对象）
     */
    fun getDateInfo(timestamp: Long = System.currentTimeMillis()): DateInfo {
        val calendar = Calendar.getInstance()
        calendar.timeInMillis = timestamp
        return DateInfo(
            date = formatDate(timestamp),
            time = formatTime(timestamp),
            week = weekNames[calendar.get(Calendar.DAY_OF_WEEK) - 1],
            year = calendar.get(Calendar.YEAR),
            month = calendar.get(Calendar.MONTH) + 1,
            day = calendar.get(Calendar.DAY_OF_MONTH),
            hour = calendar.get(Calendar.HOUR_OF_DAY),
            minute = calendar.get(Calendar.MINUTE),
            second = calendar.get(Calendar.SECOND)
        )
    }

    data class DateInfo(
        val date: String,
        val time: String,
        val week: String,
        val year: Int,
        val month: Int,
        val day: Int,
        val hour: Int,
        val minute: Int,
        val second: Int
    )
}