<template>
    <ElTree class="hc-tree-node tree-line"
            :class="ui"
            ref="ElTreeRef"
            :props="ElTreeProps"
            :load="ElTreeLoadNode"
            lazy
            highlight-current
            accordion
            node-key="primaryKeyId"
            :default-expanded-keys="defaultExpandedCids"
            @node-click="ElTreeClick"
            :indent="0">
        <template #default="{ node, data }">
            <div class="data-custom-tree-node" :id="`${idPrefix}${data['primaryKeyId']}`">
                <div class="label" :class="node.level === 1?'level-name':''">{{ node.label }}</div>
            </div>
        </template>
    </ElTree>

</template>

<script setup>
import {ref,nextTick,watch} from "vue";
import samplingApi from "~api/tentative/material/sampling"
import {isItem,getArrValue} from "vue-utils-plus"

//参数
const props = defineProps({
    projectId: {
        type: [String,Number],
        default: ''
    },
    contractId: {
        type: [String,Number],
        default: ''
    },
    wbsTempId: {
        type: [String,Number],
        default: ''
    },
    tenantId: {
        type: [String,Number],
        default: ''
    },
    wbsType: {
        type: [String,Number],
        default: ''
    },
    autoExpandKeys: {
        type: Array,
        default: () => ([])
    },
    idPrefix: {
        type: String,
        default: 'test-tree-'
    },
    ui: {
        type: String,
        default: ''
    },
})

//变量
const ElTreeRef = ref(null)
const ElTreeProps = ref({
    label: 'title',
    children: 'children',
    isLeaf: 'hasChildren'
})
const TreeExpandKey = ref(props.autoExpandKeys)
const projectId = ref(props.projectId);
const contractId = ref(props.contractId);
const wbsTempId = ref(props.wbsTempId);
const tenantId = ref(props.tenantId);
const wbsType = ref(props.wbsType);
const idPrefix = ref(props.idPrefix);

//监听
watch(() => [
    props.autoExpandKeys,
    props.projectId,
    props.contractId,
    props.wbsTempId,
    props.tenantId,
    props.idPrefix,
    props.wbsType,
], ([expandKeys, UserProjectId, UserContractId, UserWbsTempId, UserTenantId, UserIdPrefix, wbs_type]) => {
    TreeExpandKey.value = expandKeys
    projectId.value = UserProjectId
    contractId.value = UserContractId
    wbsTempId.value = UserWbsTempId
    tenantId.value = UserTenantId
    idPrefix.value = UserIdPrefix
    wbsType.value = wbs_type
})

//事件
const emit = defineEmits(['menuTap','nodeTap', 'nodeLoading'])

//树形结构异步加载数据
const defaultExpandedCids = ref([])
const ElTreeLoadNode = async (node, resolve) => {
    let parentId = '0';
    if (node.level !== 0) {
        parentId = node?.data?.id
    }
    //获取数据
    const {error, code, data} = await samplingApi.queryLazyTree({
        wbsId: wbsTempId.value,
        tenantId: tenantId.value,
        projectId: projectId.value,
        parentId,
        wbsType: wbsType.value
    })
    //处理数据
    if (!error && code === 200) {
        let clickKey = '', defaultExpandedArr = [];
        const keys = TreeExpandKey.value || []
        const resData = getArrValue(data)
        for (let i = 0; i < resData.length; i++) {
            resData[i].hasChildren = !resData[i].hasChildren
        }
        if (keys.length > 0) {
            let lastKey = keys[keys.length-1];
            for (const item of resData) {
                //自动展开
                if (isItem(keys,item?.primaryKeyId)) {
                    defaultExpandedArr.push(item?.primaryKeyId)
                }
                //最后一个，选中点击
                if (item?.primaryKeyId === lastKey) {
                    clickKey = item?.primaryKeyId
                }
            }
        } else if (node.level === 0) {
            defaultExpandedArr.push(resData[0]?.primaryKeyId)
        }
        //自动展开
        defaultExpandedCids.value = defaultExpandedArr
        if (node.level === 0) {
            emit('nodeLoading')
        }
        resolve(resData)
        //最后一个，执行点击
        if (clickKey) {
            await nextTick(() => {
                document.getElementById(`${idPrefix.value}${clickKey}`)?.click()
            })
        }
    } else {
        if (node.level === 0) {
            emit('nodeLoading')
        }
        resolve([])
    }
}

//节点被点击
const ElTreeClick = async (data,node) => {
    let autoKeysArr = []
    await getNodeExpandKeys(node, autoKeysArr)
    const autoKeys = autoKeysArr.reverse()
    emit('nodeTap', {node, data, keys: autoKeys})
}

//处理自动展开的节点KEY
const getNodeExpandKeys = async (node, newKeys) => {
    const parent = node?.parent ?? []
    const primaryKeyId = node?.data?.primaryKeyId ?? ''
    if (primaryKeyId) {
        newKeys.push(primaryKeyId)
        await getNodeExpandKeys(parent, newKeys)
    }
}
</script>

<style lang="scss" scoped>
@import "../../../../styles/app/tree.scss";
</style>
