import { readableDateDiff } from "./readableDateDiff"

/** 格式化时间: 05月08日 */
export function MMDD(date = new Date()) {
    const month = (date.getMonth() + 1).toString().padStart(2, "0")
    const day = date.getDate().toString().padStart(2, "0")
    return `${month}月${day}日`
}

/** 格式化时间: 05月08日 08:20*/
export function MMDDHHMM(date = new Date()) {
    const month = (date.getMonth() + 1).toString().padStart(2, "0")
    const day = date.getDate().toString().padStart(2, "0")
    const hour = date.getHours().toString().padStart(2, "0")
    const minute = date.getMinutes().toString().padStart(2, "0")

    return `${month}月${day}日 ${hour}:${minute}`
}

/** 格式化时间: 2023/07/01 */
export function YYYYMMDD(date = new Date()) {
    const year = date.getFullYear()
    const month = (date.getMonth() + 1).toString().padStart(2, "0")
    const day = date.getDate().toString().padStart(2, "0")

    return `${year}/${month}/${day}`
}

/** 格式化时间: 2023/07/01 08:20 */
export function YYYYMMDDHHMM(date = new Date()) {
    const year = date.getFullYear()
    const month = (date.getMonth() + 1).toString().padStart(2, "0")
    const day = date.getDate().toString().padStart(2, "0")
    const hour = date.getHours().toString().padStart(2, "0")
    const minute = date.getMinutes().toString().padStart(2, "0")

    return `${year}/${month}/${day} ${hour}:${minute}`
}

/** 格式化时间: 2023/07/01 8:02 */
export function YYYYMMDDHMM(date = new Date()) {
    const year = date.getFullYear()
    const month = (date.getMonth() + 1).toString().padStart(2, "0")
    const day = date.getDate().toString().padStart(2, "0")
    const hour = date.getHours().toString()
    const minute = date.getMinutes().toString().padStart(2, "0")

    return `${year}/${month}/${day} ${hour}:${minute}`
}

/** 格式化时间: 2023/7/1 */
export function YYYYMD(date = new Date()) {
    const year = date.getFullYear()
    const month = (date.getMonth() + 1).toString()
    const day = date.getDate().toString()

    return `${year}/${month}/${day}`
}

/** 格式化时间: 2023/7/1 8:25 */
export function YYYYMDHM(date = new Date()) {
    const year = date.getFullYear()
    const month = (date.getMonth() + 1).toString()
    const day = date.getDate().toString()
    const hour = date.getHours().toString()
    const minute = date.getMinutes().toString()

    return `${year}/${month}/${day} ${hour}:${minute}`
}

/** 可读化日期 */
export function readableDate(
    date: string | Date | number = new Date(),
    options?: {
        /** 相当于 isShort:true isYYYYMMDDHMM:true */
        auto?: boolean
        /** 把日期尽可能用「今天」、「昨天」、「前天」来替换，8 小时内的使用相对时间 */
        isShort?: boolean
        /** 2023/07/01 */
        isYYYYMMDD?: boolean
        /** 2023/7/1 */
        isYYYYMD?: boolean
        /** 2023/07/01 08:02 */
        isYYYYMMDDHHMM?: boolean
        /** 2023/07/01 8:02 */
        isYYYYMMDDHMM?: boolean
    }
) {
    if (typeof date === "string") {
        date = new Date(date)
    } else if (typeof date === "number") {
        date = new Date(date)
    }

    if (date instanceof Date === false) {
        console.error("Invalid date:", date)
        return "unknown date"
    }

    let re: string
    if (options?.auto) {
        options.isShort = true
        options.isYYYYMMDDHMM = true
    }
    if (options?.isYYYYMMDD) {
        re = YYYYMMDD(date)
    } else if (options?.isYYYYMD) {
        re = YYYYMD(date)
    } else if (options?.isYYYYMMDDHHMM) {
        re = YYYYMMDDHHMM(date)
    } else if (options?.isYYYYMMDDHMM) {
        re = YYYYMMDDHMM(date)
    } else {
        re = YYYYMMDD(date)
    }

    if (options?.isShort) {
        // 把日期尽可能用「今天」、「昨天」来替换
        const today = new Date()

        if (Math.abs(today.getTime() - date.getTime()) < 8 * 60 * 60 * 1000) {
            re = readableDateDiff(today, date, { ensureDate1Bigger: true, fuzzySecond: true })
        } else {
            let dateDateString = date.toDateString()
            if (dateDateString === today.toDateString()) {
                re = "今天 " + re.split(" ").slice(1).join("")
            } else {
                const yesterday = new Date(today)
                yesterday.setDate(yesterday.getDate() - 1)

                if (dateDateString === yesterday.toDateString()) {
                    re = "昨天 " + re.split(" ").slice(1).join("")
                } else {
                    if (today.getFullYear() === date.getFullYear()) {
                        re = MMDDHHMM(date)
                    }
                }
            }
        }
    }

    return re
}

/** 可读化时间，相当于 readableDate(date, { auto: true })
 * 日期尽可能用「今天」、「昨天」、「前天」来替换，8 小时内的使用相对时间
 */

export function readableTime(date: string | Date | number = new Date()) {
    return readableDate(date, { auto: true })
}