/**
 * 机构 → 部门 → 岗位序列 → 岗位名称 → 岗位性质(自动带出) → 岗位层级 级联选择（移动端版）
 * 与 PC 端 src/views/hrManagement/mixins/positionCascade.js 同源，接口一致：
 *   GET /main/group/getGroupList                    机构 + 部门（前端拆树）
 *   GET /fm/tmaindepartmentposition/sequence/list   部门 → 岗位序列
 *   GET /fm/tmaindepartmentposition/position/list   部门 + 序列 → 岗位
 *   GET /fm/tmaindepartmentposition/positionType/list   → 岗位性质（取首条）
 *   GET /fm/tmaindepartmentposition/positionLevel/list  → 岗位层级
 *
 * 用法：
 *   1) 页面 mixins: [positionCascadeMixin]，表单对象必须是 this.form（与 PC 的 cascadeForm 对齐）；
 *   2) 模板里用统一选择器 <hr-picker-row>（components/hr/HrPickerRow.vue）绑定本混入的
 *      onCascadeLegalChange / onCascadeDeptPick / onCascadeSequenceChange /
 *      onCascadePositionChange / onCascadeLevelChange（@change 直接传这些方法即可）；
 *      部门行用 mode="tree" + :tree="cascadeDeptTree"；
 *   3) 选人 / 详情回显后调用 await this.primeCascade() 预热各级下拉，保证名称能回显。
 *
 * 字段映射与 PC 的 CASCADE_CONFIG 一致（游离在 mixin 内，避免每个页面重复声明）：
 *   groupId / company、deptId / department、positionSequenceId / positionSequence、
 *   positionId / position、positionType / positionTypeName、positionLevelId / positionLevel
 */
import { listOrganizations } from "@/api/hr/organization";
import {
  getDeptPositionSequences,
  getDeptPositions,
  getDeptPositionType,
  getDeptPositionLevels,
} from "@/api/hr/position";
import { buildDeptTreeUnderLegal, LEGAL_TYPES } from "@/utils/hr/organization-tree";
import { getOrgOptionsWithFallback } from "@/utils/hr/current-org";
import { getDictByCode } from "@/api/common";
import { dictToPositionNatureOptions } from "@/api/hr/user";

/** 级联层级顺序：清空时按此后缀裁剪 */
const CASCADE_ORDER = ["dept", "sequence", "position", "type", "level"];

/** 表单字段映射（与后端 PO 字段名一致） */
export const CASCADE_FIELDS = {
  legalId: "groupId",
  legalName: "company",
  deptId: "deptId",
  deptName: "department",
  sequenceId: "positionSequenceId",
  sequenceName: "positionSequence",
  positionId: "positionId",
  positionName: "position",
  typeId: "positionType",
  typeName: "positionTypeName",
  levelId: "positionLevelId",
  levelName: "positionLevel",
};

/** 把扁平机构/部门列表拍平成「路径名」，便于在 actionSheet 里区分同名部门 */
function flattenDepartments(nodes = [], parentPath = "") {
  const result = [];
  nodes.forEach((node) => {
    const path = parentPath ? `${parentPath} / ${node.name}` : node.name;
    // 法人节点只作为路径前缀，不作为可选的部门
    if (!LEGAL_TYPES.has(String(node.type))) result.push({ id: node.id, name: node.name, path });
    result.push(...flattenDepartments(node.children || [], path));
  });
  return result;
}

/** 级联接口返回可能是数组 / {list|records|rows|data}，统一取数组 */
function cascadeList(payload) {
  if (Array.isArray(payload)) return payload.filter(Boolean);
  const list = payload && (payload.list || payload.records || payload.rows || payload.data);
  return Array.isArray(list) ? list.filter(Boolean) : [];
}

/** 选项里找不到 id 时，把当前表单值的名称塞回列表，保证 actionSheet / 回显可用 */
function ensureOption(list, id, name) {
  if (id == null || id === "") return list;
  if (list.some((item) => String(item.id) === String(id))) return list;
  return list.concat([{ id: String(id), name: String(name || id), path: String(name || id) }]);
}

export const positionCascadeMixin = {
  data() {
    return {
      /** 组织架构原始列表（含 parentId / type） */
      orgList: [],
      /** 机构（顶层组织）下拉 */
      legalOptions: [],
      /** 当前机构下的部门下拉（含路径名） */
      deptOptions: [],
      /** 岗位序列下拉 */
      sequenceOptions: [],
      sequenceLoading: false,
      /** 岗位下拉 */
      cascadePositionOptions: [],
      positionLoading: false,
      /** 岗位层级下拉 */
      levelOptions: [],
      levelLoading: false,
      /** 接口返回的岗位性质编码：查询岗位层级时需原样回传 */
      cascadeRawType: "",
      /** 岗位性质字典（编码 → 名称），接口不给 positionTypeName 时兜底显示 */
      positionNatureOptions: [],
    };
  },
  computed: {
    /** 级联字段所在的表单对象（离职申请 / 转正办理都是 this.form） */
    cascadeForm() {
      return this.form || {};
    },
    /**
     * 部门树（树选择用）：与个人档案页同口径 ——
     * 取所选机构节点下的 children 作为根，公司层不再入列。
     */
    cascadeDeptTree() {
      const f = CASCADE_FIELDS;
      const legalId = this.cascadeForm[f.legalId];
      if (!legalId) return [];
      const nodes = buildDeptTreeUnderLegal(this.orgList, legalId);
      const legal = nodes.find((node) => String(node.id) === String(legalId)) || nodes[0];
      return legal && Array.isArray(legal.children) ? legal.children : [];
    },
  },
  methods: {
    /** 机构 + 部门基础数据 */
    async loadCascadeOrganizations() {
      try {
        // 组织树取全量：部门级联要按当前法人从中过滤出部门
        const list = await listOrganizations({}, false);
        this.orgList = Array.isArray(list) ? list : [];
      } catch (error) {
        this.orgList = [];
      }
      // 所属机构候选项与 PC 一致（EmployeeArchiveForm.legalEntities）：
      // 主源是登录缓存 loginChangeGroupVOList（当前账号所属公司），不再列全量机构树；
      // 缓存缺名称时回落组织树兜底，编辑老数据时补当前项，避免下拉只显示 ID。
      const f = CASCADE_FIELDS;
      this.legalOptions = getOrgOptionsWithFallback(
        this.orgList,
        this.cascadeForm[f.legalId],
        this.cascadeForm[f.legalName]
      );
      this.rebuildDeptOptions();
    },
    /** 按当前机构重建部门下拉 */
    rebuildDeptOptions() {
      const f = CASCADE_FIELDS;
      const legalId = this.cascadeForm[f.legalId];
      if (legalId == null || legalId === "") {
        this.deptOptions = [];
        return;
      }
      const nodes = buildDeptTreeUnderLegal(this.orgList, legalId);
      this.deptOptions = ensureOption(flattenDepartments(nodes), this.cascadeForm[f.deptId], this.cascadeForm[f.deptName]);
    },
    /** 按当前下拉选项取名称 */
    cascadeNameOf(listName, id) {
      const hit = (this[listName] || []).find((item) => String(item.id) === String(id));
      return hit ? hit.name : "";
    },
    /** 按名称反查主键（回显兜底用） */
    cascadeIdByName(listName, name) {
      const text = String(name || "").trim();
      if (!text) return "";
      const hit = (this[listName] || []).find((item) => String(item.name).trim() === text);
      return hit ? hit.id : "";
    },
    /** 清空指定层级之后的字段与下拉（level: dept/sequence/position） */
    clearCascadeBelow(level) {
      const f = CASCADE_FIELDS;
      const form = this.cascadeForm;
      const rest = CASCADE_ORDER.slice(CASCADE_ORDER.indexOf(level) + 1);
      if (rest.indexOf("sequence") >= 0) {
        form[f.sequenceId] = "";
        form[f.sequenceName] = "";
        this.sequenceOptions = [];
      }
      if (rest.indexOf("position") >= 0) {
        form[f.positionId] = null;
        form[f.positionName] = "";
        this.cascadePositionOptions = [];
      }
      if (rest.indexOf("type") >= 0) {
        form[f.typeId] = "";
        form[f.typeName] = "";
        this.cascadeRawType = "";
      }
      if (rest.indexOf("level") >= 0) {
        form[f.levelId] = "";
        form[f.levelName] = "";
        this.levelOptions = [];
      }
    },
    /** 新增表单默认带出所属机构：登录机构列表第一个 */
    applyDefaultCascadeOrg() {
      const f = CASCADE_FIELDS;
      const form = this.cascadeForm;
      if (form[f.legalId] != null && form[f.legalId] !== "") return;
      const first = (this.legalOptions || [])[0];
      if (!first) return;
      form[f.legalId] = first.id;
      form[f.legalName] = first.name || "";
      this.rebuildDeptOptions();
    },
    /**
     * 新建态页面初始化：先把机构 / 部门候选加载出来并带出默认机构。
     * 背景：loadCascadeOrganizations 原先只在 primeCascade 里被调用，而 primeCascade
     * 只在「选人 / 详情回显」之后触发 —— 从菜单直达发起页时机构下拉会是空的，用户以为「选不出来」。
     * 与 PC 端 created(){ loadOrganizations(); applyDefaultCascadeOrg(); } 对齐。
     */
    async initCascadeOrg() {
      if (!this.orgList.length) await this.loadCascadeOrganizations();
      this.applyDefaultCascadeOrg();
      this.rebuildDeptOptions();
    },
    /* ================= 岗位性质字典（名称兜底显示） =================
     * 接口只回编码、不回 positionTypeName 时，只读框会显示成 "1"。
     * 与 PC 一致地接 /system/dict/getByCode/position_nature 反查文案。
     * 注意：只用于「显示名」，不写回 form.positionType（提交值仍用接口原编码，见下方注释）。
     */
    async loadPositionNatureDict() {
      if ((this.positionNatureOptions || []).length) return this.positionNatureOptions;
      try {
        const dict = await getDictByCode("position_nature");
        this.positionNatureOptions = dictToPositionNatureOptions(dict);
      } catch (error) {
        this.positionNatureOptions = [];
      }
      return this.positionNatureOptions;
    },
    /** 岗位性质编码 → 字典文案；查不到返回空串 */
    positionNatureLabelOf(code) {
      const key = code == null ? "" : String(code).trim();
      if (!key) return "";
      const hit = (this.positionNatureOptions || []).find(
        (item) => String(item.value).trim() === key
      );
      return hit && hit.label ? String(hit.label).trim() : "";
    },
    /* ================= 选择行回调 =================
     * 统一选择器（components/hr/HrPickerRow）的 @change 回传 (value, { label, value })，
     * 历史 actionSheet 回传的是内部选项对象 { id, name } —— 这里统一成内部形态，
     * 所以回调签名必须是 (value, picked)，只接一个参数会把「值」当成选项对象、名称丢失。
     */
    /**
     * 把选择器回传项归一化为 { id, name }。
     * 兼容三种入参：① 选项对象 { label, value }（HrPickerRow 的第二参）
     * ② 内部历史形态 { id, name } ③ 纯值（主键/编码）。
     */
    cascadePicked(picked) {
      if (picked == null) return { id: "", name: "" };
      if (typeof picked !== "object") return { id: picked, name: "" };
      return {
        id: picked.value != null ? picked.value : picked.id,
        name: picked.label != null ? picked.label : picked.name || "",
      };
    },
    /**
     * 所属机构
     * 注意签名：HrPickerRow 的 @change 回传 (value, option)，
     * 所以第一参是值、第二参才是带名称的选项对象；只接一个参数会拿不到名称。
     */
    onCascadeLegalChange(value, picked) {
      const legal = this.cascadePicked(picked || value);
      const f = CASCADE_FIELDS;
      const form = this.cascadeForm;
      form[f.legalId] = legal.id;
      form[f.legalName] = legal.name || "";
      form[f.deptId] = "";
      form[f.deptName] = "";
      this.clearCascadeBelow("dept");
      this.rebuildDeptOptions();
    },
    /** 所属部门（树选择器回传节点 id，这里补出节点名与路径） */
    onCascadeDeptPick(deptId, picked) {
      void picked;
      const hit = flattenDepartments(this.cascadeDeptTree).find(
        (item) => String(item.id) === String(deptId)
      );
      return this.onCascadeDeptChange(hit || { id: deptId, name: "" });
    },
    async onCascadeDeptChange(value, picked) {
      const dept = this.cascadePicked(picked || value);
      const f = CASCADE_FIELDS;
      const form = this.cascadeForm;
      form[f.deptId] = dept.id;
      form[f.deptName] = dept.name || "";
      this.clearCascadeBelow("dept");
      await this.loadCascadeSequences(dept.id);
    },
    /** 部门 → 岗位序列下拉 */
    async loadCascadeSequences(deptId) {
      const f = CASCADE_FIELDS;
      const current = deptId != null && deptId !== "" ? deptId : this.cascadeForm[f.deptId];
      if (current == null || current === "") {
        this.sequenceOptions = [];
        return [];
      }
      this.sequenceLoading = true;
      try {
        const data = await getDeptPositionSequences(current, false);
        this.sequenceOptions = cascadeList(data)
          .filter((item) => item && item.positionSequenceId != null)
          .map((item) => ({
            id: String(item.positionSequenceId),
            name: item.positionSequenceName || item.positionSequence || "",
          }));
      } catch (error) {
        this.sequenceOptions = [];
      } finally {
        this.sequenceLoading = false;
      }
      this.sequenceOptions = ensureOption(
        this.sequenceOptions,
        this.cascadeForm[f.sequenceId],
        this.cascadeForm[f.sequenceName]
      );
      return this.sequenceOptions;
    },
    /** 岗位序列 */
    async onCascadeSequenceChange(value, picked) {
      const sequence = this.cascadePicked(picked || value);
      const f = CASCADE_FIELDS;
      const form = this.cascadeForm;
      form[f.sequenceId] = sequence.id;
      form[f.sequenceName] = sequence.name || "";
      this.clearCascadeBelow("sequence");
      await this.loadCascadePositions();
    },
    /** 拉取「部门 + 序列」下的岗位（纯查询） */
    async fetchCascadePositions(deptId, positionSequenceId) {
      if (!deptId || !positionSequenceId) return [];
      try {
        const data = await getDeptPositions({ deptId, positionSequenceId }, false);
        return cascadeList(data)
          .filter((item) => item && item.positionId != null)
          .map((item) => ({ id: String(item.positionId), name: item.positionName || "" }));
      } catch (error) {
        return [];
      }
    },
    /** 部门 + 序列 → 岗位下拉 */
    async loadCascadePositions() {
      const f = CASCADE_FIELDS;
      const form = this.cascadeForm;
      const deptId = form[f.deptId];
      const positionSequenceId = form[f.sequenceId];
      if (!deptId || !positionSequenceId) {
        this.cascadePositionOptions = [];
        return [];
      }
      this.positionLoading = true;
      try {
        this.cascadePositionOptions = await this.fetchCascadePositions(deptId, positionSequenceId);
      } finally {
        this.positionLoading = false;
      }
      this.cascadePositionOptions = ensureOption(
        this.cascadePositionOptions,
        this.cascadeForm[f.positionId],
        this.cascadeForm[f.positionName]
      );
      return this.cascadePositionOptions;
    },
    /** 岗位名称 */
    async onCascadePositionChange(value, picked) {
      const position = this.cascadePicked(picked || value);
      const f = CASCADE_FIELDS;
      const form = this.cascadeForm;
      form[f.positionId] = position.id;
      form[f.positionName] = position.name || "";
      this.clearCascadeBelow("position");
      await this.loadCascadeTypeAndLevels();
    },
    /** 部门 + 序列 + 岗位 → 岗位性质（取首条）+ 岗位层级下拉 */
    async loadCascadeTypeAndLevels() {
      const f = CASCADE_FIELDS;
      const form = this.cascadeForm;
      const deptId = form[f.deptId];
      const positionSequenceId = form[f.sequenceId];
      const positionId = form[f.positionId];
      if (!deptId || !positionSequenceId || !positionId) return;
      try {
        const data = await getDeptPositionType({ deptId, positionId, positionSequenceId }, false);
        const first = cascadeList(data)[0] || null;
        const rawType = String((first && first.positionType) || "");
        // 名称：接口 positionTypeName 优先，取不到时用岗位性质字典按编码反查（对齐 PC），
        // 不能拿编码当名称兜底，否则只读框会显示成 "1"
        let typeName = String((first && first.positionTypeName) || "").trim();
        if (!typeName && rawType) {
          await this.loadPositionNatureDict();
          typeName = this.positionNatureLabelOf(rawType);
        }
        this.cascadeRawType = rawType;
        if (typeName) form[f.typeName] = typeName;
        // 编码字段只存编码（对齐 PC：positionType = first.positionType）。
        // 之前误把名称写进 positionType，提交时报「岗位快照与员工当前岗位关系不一致：
        // 员工当前岗位关系为【1】，转正提交为【全职】」
        if (rawType) form[f.typeId] = rawType;
      } catch (error) {
        // 级联接口异常：保留已带出的值
      }
      this.levelLoading = true;
      try {
        const data = await getDeptPositionLevels(
          { deptId, positionId, positionSequenceId, positionType: this.cascadeRawType },
          false
        );
        this.levelOptions = cascadeList(data)
          .filter((item) => item && item.positionLevelId != null)
          .map((item) => ({ id: String(item.positionLevelId), name: item.positionLevel || "" }));
      } catch (error) {
        this.levelOptions = [];
      } finally {
        this.levelLoading = false;
      }
      this.levelOptions = ensureOption(this.levelOptions, form[f.levelId], form[f.levelName]);
      // 层级唯一时自动带出，减少一次点击
      if (!form[f.levelId] && this.levelOptions.length === 1) {
        form[f.levelId] = this.levelOptions[0].id;
        form[f.levelName] = this.levelOptions[0].name || "";
      }
    },
    /** 岗位层级 */
    onCascadeLevelChange(value, picked) {
      const level = this.cascadePicked(picked || value);
      const f = CASCADE_FIELDS;
      const form = this.cascadeForm;
      form[f.levelId] = level.id;
      form[f.levelName] = level.name || "";
    },
    /**
     * 回显兜底：员工档案只带出岗位主键（或名称）而序列为空时，
     * 遍历当前部门下所有岗位序列定位，补齐序列与岗位下拉，避免级联链断裂。
     */
    async locateCascadePosition() {
      const f = CASCADE_FIELDS;
      const form = this.cascadeForm;
      const deptId = form[f.deptId];
      const targetId = form[f.positionId];
      const targetName = String(form[f.positionName] || "").trim();
      if (!deptId || (!targetId && !targetName)) return false;
      if (!this.sequenceOptions.length) await this.loadCascadeSequences(deptId);
      const sequences = this.sequenceOptions.slice();
      if (!sequences.length) return false;
      const isIdText = /^\d{15,}$/.test(targetName);
      for (let i = 0; i < sequences.length; i += 1) {
        const sequence = sequences[i];
        const options = await this.fetchCascadePositions(deptId, sequence.id);
        const hit = options.find((item) =>
          targetId ? String(item.id) === String(targetId) : !isIdText && String(item.name).trim() === targetName
        );
        if (!hit) continue;
        form[f.sequenceId] = sequence.id;
        form[f.sequenceName] = sequence.name || "";
        form[f.positionId] = hit.id;
        form[f.positionName] = hit.name || "";
        this.sequenceOptions = sequences;
        this.cascadePositionOptions = options;
        return true;
      }
      return false;
    },
    /** 选人 / 回显后逐级预热下拉（部门 → 序列 → 岗位 → 层级） */
    async primeCascade() {
      const f = CASCADE_FIELDS;
      const form = this.cascadeForm;
      if (!this.orgList.length) await this.loadCascadeOrganizations();
      // 机构：只有名称时按名称反查
      if (!form[f.legalId]) {
        form[f.legalId] = this.cascadeIdByName("legalOptions", form[f.legalName]);
      }
      this.rebuildDeptOptions();
      if (!form[f.deptId]) {
        form[f.deptId] = this.cascadeIdByName("deptOptions", form[f.deptName]);
      }
      if (!form[f.deptId]) return;
      await this.loadCascadeSequences(form[f.deptId]);
      if (!form[f.sequenceId]) {
        form[f.sequenceId] = this.cascadeIdByName("sequenceOptions", form[f.sequenceName]);
      }
      if (!form[f.sequenceId] && (form[f.positionId] || form[f.positionName])) {
        await this.locateCascadePosition();
      }
      if (!form[f.sequenceId]) {
        this.cascadePositionOptions = ensureOption(
          this.cascadePositionOptions,
          form[f.positionId],
          form[f.positionName]
        );
        return;
      }
      await this.loadCascadePositions();
      if (
        form[f.positionId] &&
        !this.cascadePositionOptions.some((item) => String(item.id) === String(form[f.positionId]))
      ) {
        await this.locateCascadePosition();
      }
      if (!form[f.positionId]) {
        form[f.positionId] = this.cascadeIdByName("cascadePositionOptions", form[f.positionName]);
      }
      if (!form[f.positionId] && form[f.positionName]) {
        await this.locateCascadePosition();
      }
      if (!form[f.positionId]) return;
      await this.loadCascadeTypeAndLevels();
      if (!form[f.levelId]) {
        form[f.levelId] = this.cascadeIdByName("levelOptions", form[f.levelName]);
      }
    },
  },
};

export default positionCascadeMixin;