<script setup lang="ts">
import { ref, computed, onMounted, watch } from "vue";
import { useQuasar } from "quasar";
import { useRouter } from "vue-router";

import http from "@/plugins/http";
import config from "@/app.config";
import { StructChart } from "structure-chart";
import "structure-chart/structure-chart.css";
import { useCounterMixin } from "@/stores/mixin";

/** use*/
const mixin = useCounterMixin();
const { showLoader, hideLoader, messageError } = mixin;
const router = useRouter();
const $q = useQuasar();
const chartRef = ref(); // อ้างอิงไปที่ตัว chart
const theBreadcrumb = ref();
const rootOrgID = ref(); // org id ของ root ตัวปัจจุบันที่เลือกอยู่
const dataSource = ref(); // ข้อมูล Chart
const idActive = ref<string>("");
const dataSourceLock = ref(); // ข้อมูลตั้งต้นของ Chart ใช้ให้กดกลับไปที่ home

/**
 * สร้าง Path Breadcrumbs
 */
function breadcrumbsGen() {
  if (rootOrgID.value !== 0) {
    theBreadcrumb.value = [];
    const newPath = findPath(rootOrgID.value);
    theBreadcrumb.value = newPath;
  }
}

/**
 * === กระบวนการสร้าง Path ===
 */
/**
 * Recursive เพื่อหา Path ที่ผู้ใช้คลิก
 * @param id OrgID ของหน่วยงานที่ต้องการหา
 * @param chart Array ของ Object ของหน่วยงานย่อยใน Tree นั้น ๆ
 */
function chartTraverse(id: any, chart: any): any {
  let _returnPath = [];
  for (const child of chart) {
    if (child.deptID === id) {
      _returnPath.push({
        label: child.departmentName,
        id: child.deptID,
        type: child.type,
      });
      return _returnPath;
    } else {
      if (
        typeof child.children !== "undefined" &&
        child.children !== null &&
        child.children.length > 0
      ) {
        let _result = chartTraverse(id, child.children);
        if (typeof _result !== "undefined" && _result !== null) {
          _returnPath.push({
            label: child.departmentName,
            id: child.deptID,
            type: child.type,
          });
          return [..._returnPath, ...(_result ?? [])];
        }
      }
    }
  }
}

function findPath(id: any) {
  let _path = [];
  _path.push({
    label: dataSourceLock.value.departmentName,
    id: dataSourceLock.value.deptID,
    type: dataSourceLock.value.type,
  });

  if (dataSourceLock.value.deptID === id) return _path;
  if (dataSourceLock.value.children.length > 0) {
    let _returnPath = chartTraverse(id, dataSourceLock.value.children);
    return [..._path, ...(_returnPath ?? [])];
  }
}

function savePNG() {
  chartRef.value.savePNG();
}

function savePDF() {
  chartRef.value.savePDF();
}

/**
 * เมื่อมีการคลิกที่ Chart ให้อ่าน ID ของหน่วยงานที่ถูกคลิก แล้วดึงข้อมูล Chart ของหน่วยงานนั้น ๆ จาก API
 * @param data
 */
async function refreshChart(data: any, type: number) {

  if (data.value === undefined) {
    fetchStructChart(data, type.toString());
    rootOrgID.value = data;
  } else {
    searchAndReplace(dataSource.value, data.value);
  }
}

async function fetchStructChart(
  id: string,
  type: string,
  status: boolean = false
) {

  showLoader();
  await http
    .get(config.API.orgStructChart(id, type))
    .then((res) => {
      if (res.data.result.length > 0) {
        const data = res.data.result[0];
        const struct = [];
        struct.push({ ...data, officer: [], heads: [] });
        dataSource.value = struct[0];
        if (dataSourceLock.value === undefined || status)
          dataSourceLock.value = dataSource.value;
        breadcrumbsGen();
      }
    })
    .catch((err) => {
      messageError($q, err);
    })
    .finally(() => {
      hideLoader();
    });
}

function searchAndReplace(data: any, id: string) {
  if (data.deptID === id) {
    fetchStructChart(data.deptID, data.type.toString());
    rootOrgID.value = data.deptID;
  } else if (data.children) {
    for (const child of data.children) {
      searchAndReplace(child, id);
    }
  }
}

function getActive() {
  http
    .get(config.API.orgActive)
    .then(async (res) => {
      const data = await res.data.result;
      idActive.value = data.activeId;
      fetchStructChart(data.activeId, "0");
    })
    .catch((e) => {
      messageError($q, e);
    })
    .finally(() => {});
}
/** hook lifecycle*/
onMounted(async () => {
  await getActive();
});
</script>

<template>
  <div class="col-12 row justify-center">
    <div class="col-xs-12 col-sm-12 col-md-11">
      <div class="toptitle text-white col-12 row items-center">
        <q-btn
          icon="mdi-arrow-left"
          unelevated
          round
          dense
          flat
          color="primary"
          class="q-mr-sm"
          @click="router.go(-1)"
        />
        <div>แผนผังองค์กร</div>
      </div>
    </div>

    <div class="col-xs-12 col-sm-12 col-md-11 row q-col-gutter-md">
      <div class="col-12 row">
        <q-card bordered class="col-12 row caedNone">
          <div class="q-pa-sm row wrap items-center">
            <q-btn
              flat
              round
              color="primary"
              @click="savePNG()"
              icon="mdi-image"
            >
              <q-tooltip> ดาวน์โหลด PNG </q-tooltip>
            </q-btn>
            <q-btn
              flat
              round
              color="red-7"
              @click="savePDF()"
              icon="mdi-file-pdf-box"
            >
              <q-tooltip> ดาวน์โหลด PDF </q-tooltip>
            </q-btn>
            <div class="bg-grey-2 q-py-xs q-px-sm rounded-borders">
              <q-breadcrumbs>
                <template v-slot:separator>
                  <q-icon size="1.5em" name="chevron_right" color="primary" />
                </template>
                <template v-for="link in theBreadcrumb" :key="link.id">
                  <q-breadcrumbs-el
                    :label="link.label"
                    @click="refreshChart(link.id, link.type)"
                    class="breadcrumbs-link"
                  />
                </template>
              </q-breadcrumbs>
            </div>
          </div>
          <div class="col-12">
            <q-separator />
          </div>
          <div style="overflow-x: auto; overflow-y: auto" class="q-pt-md">
            <StructChart
              style="height: 70vh"
              ref="chartRef"
              class="struct"
              :dataSource="dataSource"
              @onElementClick="refreshChart"
            />
          </div>
        </q-card>
      </div>
    </div>
  </div>
</template>

<style scoped>
.breadcrumbs-link {
  cursor: pointer;
}
.struct .section-primary .header,
.struct .section-secondary .header,
.struct .section-tertiary .header {
  font-size: 1rem !important;
}

.struct .section-primary .column-side .side-button,
.struct .section-secondary .column-side .side-button,
.struct .section-list .column-side .side-button {
  background-color: #d9d9d96b !important;
  color: #545459 !important;
  width: 25px !important;
  height: 25px !important;
  font-size: 11px !important;
  padding: 0px;
}

.struct .section-primary,
.section-secondary,
.struct .section-list {
  padding: 6px 15px 6px 15px;
}
.struct .section-primary .header {
  font-weight: 600 !important;
}

.struct .section-secondary .header {
  font-weight: 400 !important;
}

.struct .subchild-more {
  background-position: center !important;
  background-size: 14px !important;
}
</style>
