<template>
    <div class="num-block">
        <div class="num-block_show">
            <div class="num-block_numbers" :class="{'ellipsis': !isNum(item)}" v-for="(item, key) in numbers" :key="key">
                <!-- <ul class="num-block_ul" :style="ulStyles(noNumbers(item, key))" v-if="isNum(item)"> -->
                <ul class="num-block_ul" :style="ulStyles(item, key)" v-if="isNum(item)">
                    <!-- <li v-for="(opt, index) in noNumbers(item, key)" :key="index">
                        {{ opt }}
                    </li> -->
                    <li>0</li>
                    <li>1</li>
                    <li>2</li>
                    <li>3</li>
                    <li>4</li>
                    <li>5</li>
                    <li>6</li>
                    <li>7</li>
                    <li>8</li>
                    <li>9</li>
                </ul>
                <div class="num-block_ellipsis" v-else>,</div>
            </div>
        </div>
        <!-- <div style="position:absolute;top:250px;left:0">
            {{ this.numbers }}
        </div> -->
    </div>
</template>

<script>
    export default {
        name: "ws-num-block",
        props: ['data'],
        data() {
            return {
                currentData: '10',
                lastData: '10'
            }
        },
        computed: {
            numbers() {
                let data = this.data;
                if(!data) {
                    return
                }
                data = this.dealData(data);
                return data;
            }
        },
        watch: {
            data(val){
                let lastData = this.currentData;
                this.currentData = this.dealData(val);
                this.lastData = lastData;
            }
        },
        methods: {
            noNumbers(item, key) {
                let lastData = this.lastData;
                let lastItem = this.lastData[key];
                let result = [];
                lastItem = lastItem ? lastItem : '0';
                if(lastItem != item) {
                    if(lastItem == ',' || item == ',') {
                        result.push(item);
                        return result;
                    }else {
                        let meal = 0;
                        if(Number(item) < Number(lastItem)) {
                            meal = Number(item) + 10 - Number(lastItem);
                        }else {
                            meal = Number(item) - Number(lastItem);
                        }
                        for(let i=0;i<meal+1;i++) {
                            if(Number(lastItem) > 9) {
                                lastItem = 0;
                            }
                            result.push(lastItem.toString());
                            lastItem++;
                        }
                        return result;
                    }
                }else {
                    result.push(item);
                    return result;
                }
            },
            // ulStyles(arr) {
            ulStyles(item, key) {
                // if(!arr) {
                //     return
                // }
                let top = 0;
                // let currentTop = -26 * Number(arr.length-1);
                let currentTop = -30 * Number(item);
                top = currentTop + 'px';
                // top = 0;
                return {
                    'position': 'absolute',
                    'left': 0,
                    'top': top,
                    'width': '12px',
                    'list-style': 'none',
                    'padding': '0',
                    'margin': '0',
                    'transition': '1s'
                }
            },
            isNum(val) {
                return val == ',' ? false : true
            },
            dealData(val) {
                let vals = val.toString().split('').reverse();
                let dealData = [];
                for(let i=0;i<vals.length;i++) {
                    if( i > 0 && i%3 == 0 ) {
                        dealData.push(',');
                    }
                    dealData.push(vals[i]);
                }
                dealData = dealData.reverse().join('');
                return dealData;
            }
        }
    };
</script>
<style lang="sass">
    .num-block
        width: 100%
        height: auto
        &_show
            display: flex
            justify-content: center
            height: 30px
            overflow: hidden
        &_numbers
            position: relative
            width: 14px
        &_numbers.ellipsis
            width: 6px
        &_ul>li
            height: 30px
            line-height: 30px
        &_ellipsis
            position: absolute
            left: 0
            top: 0
            width: 6px
</style>