import Parse from '../../../../shared/db/parse-client.js';
import {
  getInternalContactList,
  getContactDetailsBatch,
} from './qiwe-api.service.js';
import { listStores } from './organization.service.js';

export interface OrgDepartmentDto {
  id: string;
  partyId: string;
  name: string;
  parentPartyId: string;
  regionCode: string;
  storeId: string;
  orderIndex: number;
}

export interface OrgMemberDto {
  id: string;
  userId: string;
  name: string;
  partyIds: string[];
  mobile: string;
  position: string;
}

export interface OrgTreeNode {
  partyId: string;
  name: string;
  regionCode: string;
  storeId: string;
  children: OrgTreeNode[];
  members: OrgMemberDto[];
}

const SEED_DEPARTMENTS = [
  { partyId: 'root', name: '拉迷总部', parentPartyId: '', regionCode: '', storeId: '', orderIndex: 0 },
  { partyId: 'region_east', name: '华东区域', parentPartyId: 'root', regionCode: '华东', storeId: '', orderIndex: 1 },
  { partyId: 'region_north', name: '华北区域', parentPartyId: 'root', regionCode: '华北', storeId: '', orderIndex: 2 },
  { partyId: 'region_south', name: '华南区域', parentPartyId: 'root', regionCode: '华南', storeId: '', orderIndex: 3 },
];

function deptToDto(obj: Parse.Object): OrgDepartmentDto {
  return {
    id: obj.id!,
    partyId: obj.get('partyId') || '',
    name: obj.get('name') || '',
    parentPartyId: obj.get('parentPartyId') || '',
    regionCode: obj.get('regionCode') || '',
    storeId: obj.get('storeId') || '',
    orderIndex: obj.get('orderIndex') ?? 0,
  };
}

function memberToDto(obj: Parse.Object): OrgMemberDto {
  return {
    id: obj.id!,
    userId: obj.get('userId') || '',
    name: obj.get('name') || '',
    partyIds: (obj.get('partyIds') as string[]) || [],
    mobile: obj.get('mobile') || '',
    position: obj.get('position') || '',
  };
}

export async function listOrgDepartments(): Promise<OrgDepartmentDto[]> {
  const query = new Parse.Query('OrgDepartment');
  query.ascending('orderIndex');
  query.limit(500);
  const results = await query.find({ useMasterKey: true });
  return results.map(deptToDto);
}

export async function listOrgMembers(): Promise<OrgMemberDto[]> {
  const query = new Parse.Query('OrgMember');
  query.limit(1000);
  const results = await query.find({ useMasterKey: true });
  return results.map(memberToDto);
}

export async function getOrgMemberName(userId: string): Promise<string> {
  if (!userId) return '';
  const query = new Parse.Query('OrgMember');
  query.equalTo('userId', userId);
  const member = await query.first({ useMasterKey: true });
  return member?.get('name') || '';
}

export async function buildOrgTree(): Promise<OrgTreeNode[]> {
  const [departments, members] = await Promise.all([
    listOrgDepartments(),
    listOrgMembers(),
  ]);

  const nodeMap = new Map<string, OrgTreeNode>();
  for (const dept of departments) {
    nodeMap.set(dept.partyId, {
      partyId: dept.partyId,
      name: dept.name,
      regionCode: dept.regionCode,
      storeId: dept.storeId,
      children: [],
      members: [],
    });
  }

  for (const member of members) {
    const primaryParty = member.partyIds[0];
    const node = primaryParty ? nodeMap.get(primaryParty) : undefined;
    if (node) node.members.push(member);
  }

  const roots: OrgTreeNode[] = [];
  for (const dept of departments) {
    const node = nodeMap.get(dept.partyId)!;
    if (!dept.parentPartyId) {
      roots.push(node);
      continue;
    }
    const parent = nodeMap.get(dept.parentPartyId);
    if (parent) parent.children.push(node);
    else roots.push(node);
  }

  return roots;
}

async function upsertDepartment(data: Omit<OrgDepartmentDto, 'id'>): Promise<void> {
  const query = new Parse.Query('OrgDepartment');
  query.equalTo('partyId', data.partyId);
  const existing = await query.first({ useMasterKey: true });
  const obj = existing ?? new Parse.Object('OrgDepartment');
  obj.set('partyId', data.partyId);
  obj.set('name', data.name);
  obj.set('parentPartyId', data.parentPartyId);
  obj.set('regionCode', data.regionCode);
  obj.set('storeId', data.storeId);
  obj.set('orderIndex', data.orderIndex);
  obj.set('syncedAt', new Date());
  await obj.save(null, { useMasterKey: true });
}

async function upsertMember(data: Omit<OrgMemberDto, 'id'>): Promise<void> {
  const query = new Parse.Query('OrgMember');
  query.equalTo('userId', data.userId);
  const existing = await query.first({ useMasterKey: true });
  const obj = existing ?? new Parse.Object('OrgMember');
  obj.set('userId', data.userId);
  obj.set('name', data.name);
  obj.set('partyIds', data.partyIds);
  obj.set('mobile', data.mobile);
  obj.set('position', data.position);
  obj.set('syncedAt', new Date());
  await obj.save(null, { useMasterKey: true });
}

export async function bootstrapOrgTree(): Promise<void> {
  const stores = await listStores();
  let order = 10;

  for (const seed of SEED_DEPARTMENTS) {
    await upsertDepartment({ ...seed, orderIndex: seed.orderIndex });
  }

  for (const store of stores) {
    const partyId = `store_${store.code.toLowerCase()}`;
    const parentPartyId = SEED_DEPARTMENTS.find((d) => d.regionCode === store.region)?.partyId || 'root';
    await upsertDepartment({
      partyId,
      name: store.name,
      parentPartyId,
      regionCode: store.region,
      storeId: store.id,
      orderIndex: order++,
    });
  }

  console.log('[Org] 组织树种子已同步');
}

export async function syncOrgFromQiWe(): Promise<{
  departments: number;
  members: number;
  source: 'qiwe' | 'seed';
  errors: string[];
}> {
  const errors: string[] = [];

  try {
    const contacts = await getInternalContactList();
    if (contacts.length === 0) {
      return { departments: 0, members: 0, source: 'seed', errors: ['企微未返回内部联系人，保留本地组织树'] };
    }

    const userIds = contacts.map((c) => c.userId).filter(Boolean);
    const details = await getContactDetailsBatch(userIds);

    const partyIds = new Set<string>();
    for (const contact of contacts) {
      if (contact.partyId) partyIds.add(contact.partyId);
    }

    let deptCount = 0;
    for (const partyId of partyIds) {
      await upsertDepartment({
        partyId,
        name: `部门 ${partyId.slice(-6)}`,
        parentPartyId: 'root',
        regionCode: '',
        storeId: '',
        orderIndex: deptCount,
      });
      deptCount++;
    }

    let memberCount = 0;
    for (const contact of contacts) {
      const detail = details.find((d) => d.userId === contact.userId);
      await upsertMember({
        userId: contact.userId,
        name: detail?.name || contact.userId,
        partyIds: contact.partyId ? [contact.partyId] : [],
        mobile: detail?.mobile || '',
        position: detail?.position || '',
      });
      memberCount++;
    }

    return { departments: deptCount, members: memberCount, source: 'qiwe', errors };
  } catch (err: unknown) {
    const msg = err instanceof Error ? err.message : String(err);
    errors.push(msg);
    return { departments: 0, members: 0, source: 'seed', errors };
  }
}