<template>
<uni-shadow-root class="dist-area-index"><van-picker class="van-area__picker" active-class="active-class" toolbar-class="toolbar-class" column-class="column-class" :show-toolbar="showToolbar" value-key="name" :title="title" :loading="loading" :columns="computed.displayColumns(columns, columnsNum)" :item-height="itemHeight" :visible-item-count="visibleItemCount" :cancel-button-text="cancelButtonText" :confirm-button-text="confirmButtonText" @change="onChange" @confirm="onConfirm" @cancel="onCancel"></van-picker></uni-shadow-root>
</template>
<wxs src="./index.wxs" module="computed"></wxs>
<script>
import VanPicker from '../picker/index.vue'
global['__wxVueOptions'] = {components:{'van-picker': VanPicker}}

global['__wxRoute'] = 'dist/area/index'
import { VantComponent } from '../common/component';
import { pickerProps } from '../picker/shared';
import { requestAnimationFrame } from '../common/utils';
const EMPTY_CODE = '000000';
VantComponent({
    classes: ['active-class', 'toolbar-class', 'column-class'],
    props: Object.assign(Object.assign({}, pickerProps), { showToolbar: {
            type: Boolean,
            value: true,
        }, value: {
            type: String,
            observer(value) {
                this.code = value;
                this.setValues();
            },
        }, areaList: {
            type: Object,
            value: {},
            observer: 'setValues',
        }, columnsNum: {
            type: null,
            value: 3,
        }, columnsPlaceholder: {
            type: Array,
            observer(val) {
                this.setData({
                    typeToColumnsPlaceholder: {
                        province: val[0] || '',
                        city: val[1] || '',
                        county: val[2] || '',
                    },
                });
            },
        } }),
    data: {
        columns: [{ values: [] }, { values: [] }, { values: [] }],
        typeToColumnsPlaceholder: {},
    },
    mounted() {
        requestAnimationFrame(() => {
            this.setValues();
        });
    },
    methods: {
        getPicker() {
            if (this.picker == null) {
                this.picker = this.selectComponent('.van-area__picker');
            }
            return this.picker;
        },
        onCancel(event) {
            this.emit('cancel', event.detail);
        },
        onConfirm(event) {
            const { index } = event.detail;
            let { value } = event.detail;
            value = this.parseValues(value);
            this.emit('confirm', { value, index });
        },
        emit(type, detail) {
            detail.values = detail.value;
            delete detail.value;
            this.$emit(type, detail);
        },
        parseValues(values) {
            const { columnsPlaceholder } = this.data;
            return values.map((value, index) => {
                if (value &&
                    (!value.code || value.name === columnsPlaceholder[index])) {
                    return Object.assign(Object.assign({}, value), { code: '', name: '' });
                }
                return value;
            });
        },
        onChange(event) {
            var _a;
            const { index, picker, value } = event.detail;
            this.code = value[index].code;
            (_a = this.setValues()) === null || _a === void 0 ? void 0 : _a.then(() => {
                this.$emit('change', {
                    picker,
                    values: this.parseValues(picker.getValues()),
                    index,
                });
            });
        },
        getConfig(type) {
            const { areaList } = this.data;
            return (areaList && areaList[`${type}_list`]) || {};
        },
        getList(type, code) {
            if (type !== 'province' && !code) {
                return [];
            }
            const { typeToColumnsPlaceholder } = this.data;
            const list = this.getConfig(type);
            let result = Object.keys(list).map((code) => ({
                code,
                name: list[code],
            }));
            if (code != null) {
                // oversea code
                if (code[0] === '9' && type === 'city') {
                    code = '9';
                }
                result = result.filter((item) => item.code.indexOf(code) === 0);
            }
            if (typeToColumnsPlaceholder[type] && result.length) {
                // set columns placeholder
                const codeFill = type === 'province'
                    ? ''
                    : type === 'city'
                        ? EMPTY_CODE.slice(2, 4)
                        : EMPTY_CODE.slice(4, 6);
                result.unshift({
                    code: `${code}${codeFill}`,
                    name: typeToColumnsPlaceholder[type],
                });
            }
            return result;
        },
        getIndex(type, code) {
            let compareNum = type === 'province' ? 2 : type === 'city' ? 4 : 6;
            const list = this.getList(type, code.slice(0, compareNum - 2));
            // oversea code
            if (code[0] === '9' && type === 'province') {
                compareNum = 1;
            }
            code = code.slice(0, compareNum);
            for (let i = 0; i < list.length; i++) {
                if (list[i].code.slice(0, compareNum) === code) {
                    return i;
                }
            }
            return 0;
        },
        setValues() {
            const picker = this.getPicker();
            if (!picker) {
                return;
            }
            let code = this.code || this.getDefaultCode();
            const provinceList = this.getList('province');
            const cityList = this.getList('city', code.slice(0, 2));
            const stack = [];
            const indexes = [];
            const { columnsNum } = this.data;
            if (columnsNum >= 1) {
                stack.push(picker.setColumnValues(0, provinceList, false));
                indexes.push(this.getIndex('province', code));
            }
            if (columnsNum >= 2) {
                stack.push(picker.setColumnValues(1, cityList, false));
                indexes.push(this.getIndex('city', code));
                if (cityList.length && code.slice(2, 4) === '00') {
                    [{ code }] = cityList;
                }
            }
            if (columnsNum === 3) {
                stack.push(picker.setColumnValues(2, this.getList('county', code.slice(0, 4)), false));
                indexes.push(this.getIndex('county', code));
            }
            return Promise.all(stack)
                .catch(() => { })
                .then(() => picker.setIndexes(indexes))
                .catch(() => { });
        },
        getDefaultCode() {
            const { columnsPlaceholder } = this.data;
            if (columnsPlaceholder.length) {
                return EMPTY_CODE;
            }
            const countyCodes = Object.keys(this.getConfig('county'));
            if (countyCodes[0]) {
                return countyCodes[0];
            }
            const cityCodes = Object.keys(this.getConfig('city'));
            if (cityCodes[0]) {
                return cityCodes[0];
            }
            return '';
        },
        getValues() {
            const picker = this.getPicker();
            if (!picker) {
                return [];
            }
            return this.parseValues(picker.getValues().filter((value) => !!value));
        },
        getDetail() {
            const values = this.getValues();
            const area = {
                code: '',
                country: '',
                province: '',
                city: '',
                county: '',
            };
            if (!values.length) {
                return area;
            }
            const names = values.map((item) => item.name);
            area.code = values[values.length - 1].code;
            if (area.code[0] === '9') {
                area.country = names[1] || '';
                area.province = names[2] || '';
            }
            else {
                area.province = names[0] || '';
                area.city = names[1] || '';
                area.county = names[2] || '';
            }
            return area;
        },
        reset(code) {
            this.code = code || '';
            return this.setValues();
        },
    },
});
export default global['__wxComponents']['dist/area/index']
</script>
<style platform="mp-weixin">
@import '../common/index.css';
</style>