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package jchanghong.kotlin

import cn.hutool.core.date.DateTime
import cn.hutool.core.date.DateUtil
import java.time.LocalDate
import java.time.LocalDateTime
import java.time.ZoneOffset
import java.time.format.DateTimeFormatter
import java.util.*

const val DATE_TIME_PATTERN = "yyyy-MM-dd HH:mm:ss"
const val DATE_PATTERN = "yyyy-MM-dd"

/**
\* Created with IntelliJ IDEA.
\* User: jiang
\* Date: 2020/1/5
\* Time: 11:02
\*/
fun LocalDateTime?.toStr(): String {
    this ?: return DateUtil.now()
    return this.format(DateTimeFormatter.ofPattern(DATE_TIME_PATTERN)) ?: ""
}

fun Date?.toStr(): String {
    this ?: return DateUtil.now()
    return DateUtil.formatDateTime(this)
}

fun Any?.toStr(): String {
    return when (this) {
        is Date -> this.toStr()
        is LocalDate -> this.toStr()
        is LocalDateTime -> this.toStr()
        else -> this.toString()
    }
}

fun LocalDate?.toStr(): String {
    this ?: return DateUtil.today()
    return this.format(DateTimeFormatter.ofPattern(DATE_PATTERN)) ?: ""
}

fun LocalDateTime?.toDate(): Date {
    this ?: return Date()
    return Date.from(this.toInstant(ZoneOffset.ofHours(8)))
}

fun LocalDate?.toDate(): Date {
    this ?: return Date()
    return Date.from(
        this.atTime(0, 0, 0)
            .toInstant(ZoneOffset.ofHours(8))
    )
}

fun Date?.toLocalDateTime(): LocalDateTime {
    this ?: return LocalDateTime.now()
    return LocalDateTime.parse(this.toStr(), DateTimeFormatter.ofPattern(DATE_TIME_PATTERN))
}

fun String?.toLocalDateTime(): LocalDateTime {
    this ?: return LocalDateTime.now()
    return try {
        val dateTime: DateTime? = DateUtil.parse(this)
        dateTime.toLocalDateTime()
    } catch (e: Exception) {
        LocalDateTime.now()
    }
}

fun main() {
    println(DateUtil.now().toLocalDateTime().toStr())
    println(Date().toLocalDateTime().toStr())
    println(LocalDateTime.now().toStr())
    println(LocalDate.now().toStr())
    println(LocalDateTime.now().toDate().toStr())
    println(LocalDate.now().toDate().toStr())
}