export const stringFormatter = () => {
    function fileSize(bytes: number | undefined, dp = 2) {
        if (!bytes) {
            return 0.0
        }

        const thresh = 1024

        if (Math.abs(bytes) < thresh) {
            return bytes + ' B'
        }

        const units = ['KiB', 'MiB', 'GiB', 'TiB', 'PiB', 'EiB', 'ZiB', 'YiB']
        let u = -1
        const r = 10 ** dp

        do {
            bytes /= thresh
            ++u
        } while (Math.round(Math.abs(bytes) * r) / r >= thresh && u < units.length - 1)

        return bytes.toFixed(dp) + ' ' + units[u]
    }

    function formatLog(text: string) {
        return text
            .replace(/\x1B\[33m(.*?)\x1B\[0m/g, '<span class="log-number">$1</span>')
            .replace(/\x1B\[1m\x1B\[35m(.*?)\x1B\[0m\x1B\[22m/g, '<span class="log-addr">$1</span>')
            .replace(/\x1B\[94m(.*?)\x1B\[0m/g, '<span class="log-cmd">$1</span>')
            .replace(/\x1B\[90m(.*?)\x1B\[0m/g, '<span class="log-debug">$1</span>')
            .replace(/(\[\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}.[\d]+\])/g, '<span class="log-time">$1</span>')
            .replace(/\[ INFO\]/g, '<span class="log-info">[ INFO]</span>')
            .replace(/\[ WARN\]/g, '<span class="log-warning">[ WARN]</span>')
            .replace(/\[ERROR\]/g, '<span class="log-error">[ERROR]</span>')
            .replace(/\[DEBUG\]/g, '<span class="log-debug">[DEBUG]</span>')
            .replace(/\[Decoder\]/g, '<span class="log-decoder">[Decoder]</span>')
            .replace(/\[Encoder\]/g, '<span class="log-encoder">[Encoder]</span>')
            .replace(/\[Server\]/g, '<span class="log-server">[Server]</span>')
            .replace(/\[Validator\]/g, '<span class="log-server">[Validator]</span>')
    }

    function timeToSeconds(time: string) {
        const t = time.split(':')
        return parseInt(t[0]) * 3600 + parseInt(t[1]) * 60 + parseInt(t[2])
    }

    function secToHMS(sec: number) {
        const hours = Math.floor(sec / 3600)
        sec %= 3600
        const minutes = Math.floor(sec / 60)
        const seconds = Math.round(sec % 60)

        const m = String(minutes).padStart(2, '0')
        const h = String(hours).padStart(2, '0')
        const s = String(seconds).padStart(2, '0')
        return `${h}:${m}:${s}`
    }

    function numberToHex(num: number) {
        return '0x' + Math.round(num * 255).toString(16)
    }

    function hexToNumber(num: string): number {
        return parseFloat((parseFloat(parseInt(num, 16).toString()) / 255).toFixed(2))
    }

    function filename(path: string) {
        if (path) {
            const pathArr = path.split('/')
            const name = pathArr[pathArr.length - 1]

            if (name) {
                return name
            } else {
                return path
            }
        } else {
            return ''
        }
    }

    function parent(path: string) {
        if (path) {
            const pathArr = path.split('/')
            pathArr.pop()

            if (pathArr.length > 0) {
                return pathArr.join('/')
            } else {
                return '/'
            }
        } else {
            return ''
        }
    }

    function toMin(sec: number) {
        if (sec) {
            const minutes = Math.floor(sec / 60)
            const seconds = Math.round(sec - minutes * 60)
            return `${String(minutes).padStart(2, '0')}:${String(seconds).padStart(2, '0')} min`
        } else {
            return ''
        }
    }

    function secondsToTime(sec: number) {
        return new Date(sec * 1000).toISOString().substring(11, 19)
    }

    function mediaType(path: string) {
        const liveType = ['m3u8']
        const videoType = [
            'avi',
            'flv',
            'm2v',
            'm4v',
            'mkv',
            'mov',
            'mp4',
            'mpeg',
            'mpg',
            'mts',
            'mxf',
            'ts',
            'vob',
            'ogv',
            'webm',
            'wmv',
        ]
        const audioType = ['aac', 'aiff', 'flac', 'm4a', 'mp2', 'mp3', 'ogg', 'opus', 'wav', 'wma']
        const imageType = [
            'apng',
            'avif',
            'bmp',
            'exr',
            'gif',
            'jpeg',
            'jpg',
            'png',
            'psd',
            'tga',
            'tif',
            'tiff',
            'webp',
        ]
        const ext = path.split('.').pop()

        if (ext) {
            if (liveType.includes(ext)) {
                return 'live'
            } else if (videoType.includes(ext)) {
                return 'video'
            } else if (audioType.includes(ext)) {
                return 'audio'
            } else if (imageType.includes(ext)) {
                return 'image'
            }
        }

        return null
    }

    return {
        fileSize,
        formatLog,
        timeToSeconds,
        secToHMS,
        numberToHex,
        hexToNumber,
        filename,
        parent,
        toMin,
        secondsToTime,
        mediaType,
    }
}

export const playlistOperations = () => {
    function genUID() {
        return String(Date.now().toString(32) + Math.random().toString(16)).replace(/\./g, '')
    }

    function processPlaylist(dayStart: number, length: number, list: PlaylistItem[], forSave: boolean) {
        if (!dayStart) {
            dayStart = 0
        }

        let begin = dayStart
        const newList = []

        for (const item of list) {
            if (!item.uid) {
                item.uid = genUID()
            }

            item.begin = begin

            if (!item.audio) {
                delete item.audio
            }

            if (!item.category) {
                delete item.category
            }

            if (!item.custom_filter) {
                delete item.custom_filter
            }

            if (begin + (item.out - item.in) > length + dayStart) {
                item.class = 'overLength'

                if (forSave) {
                    item.out = length + dayStart - begin
                }
            }

            if (forSave && begin >= length + dayStart) {
                break
            }

            newList.push(item)

            begin += item.out - item.in
        }

        return newList
    }

    return { processPlaylist, genUID }
}