import { DropdownDirective } from '../shared/dropdown.directive';
import { CommonModule } from '@angular/common';
import { ChangeDetectionStrategy, Component, OnInit, inject, signal } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { RouterLink } from '@angular/router';
import { Building2, ChevronLeft, ChevronRight, Eye, Pencil, Plus, RefreshCw, Search, Trash2, Users, X } from 'lucide-angular';
import { LucideAngularModule } from 'lucide-angular';
import { StorePage, StoreSummary } from '../admin.models';
import { OperationsService } from '../operations.service';

@Component({
  selector: 'app-operations-stores',
  standalone: true,
  imports: [DropdownDirective, CommonModule, FormsModule, RouterLink, LucideAngularModule],
  templateUrl: './operations-stores.component.html',
  styleUrls: ['./operations-professional.scss', './operations-stores.component.scss'],
  changeDetection: ChangeDetectionStrategy.OnPush,
})
export class OperationsStoresComponent implements OnInit {
  readonly page = signal<StorePage | null>(null);
  readonly query = signal('');
  readonly status = signal('all');
  readonly loading = signal(true);
  readonly saving = signal(false);
  readonly error = signal('');
  readonly message = signal('');
  readonly drawerOpen = signal(false);
  readonly editing = signal<StoreSummary | null>(null);
  readonly deleteArmed = signal(false);

  readonly username = signal('');
  readonly password = signal('');
  readonly storeName = signal('');
  readonly contactName = signal('');
  readonly mobile = signal('');
  readonly parentStoreId = signal(0);
  readonly disabled = signal(false);
  readonly reason = signal('');

  readonly icons = { Building2, ChevronLeft, ChevronRight, Eye, Pencil, Plus, RefreshCw, Search, Trash2, Users, X };
  private readonly operations = inject(OperationsService);

  ngOnInit(): void { void this.load(1); }

  async load(page = 1): Promise<void> {
    this.loading.set(true);
    this.error.set('');
    try {
      this.page.set(await this.operations.stores(page, 20, this.query(), { status: this.status() }));
    } catch (error) {
      this.error.set(error instanceof Error ? error.message : '门店数据加载失败');
    } finally {
      this.loading.set(false);
    }
  }

  reset(): void {
    this.query.set('');
    this.status.set('all');
    void this.load(1);
  }

  pageCount(): number { return Math.max(1, Math.ceil((this.page()?.total || 0) / (this.page()?.pageSize || 20))); }

  availableParents() {
    const ownId = this.editing()?.userId || 0;
    return (this.page()?.parents || []).filter((store) => store.userId !== ownId);
  }

  openCreate(): void {
    this.editing.set(null);
    this.username.set('');
    this.password.set('');
    this.storeName.set('');
    this.contactName.set('');
    this.mobile.set('');
    this.parentStoreId.set(0);
    this.disabled.set(false);
    this.reason.set('新增门店');
    this.deleteArmed.set(false);
    this.error.set('');
    this.drawerOpen.set(true);
  }

  openEdit(row: StoreSummary, deleteMode = false): void {
    if (row.readOnly) {
      this.message.set('该门店来自旧系统实时数据，持续同步落库前暂不允许在新后台单边修改。');
      return;
    }
    this.editing.set(row);
    this.username.set(row.username);
    this.password.set('');
    this.storeName.set(row.storeName);
    this.contactName.set(row.contactName || '');
    this.mobile.set(row.mobile || '');
    this.parentStoreId.set(row.parentStoreId || 0);
    this.disabled.set(row.status === 'disabled');
    this.reason.set('');
    this.deleteArmed.set(deleteMode);
    this.error.set('');
    this.drawerOpen.set(true);
  }

  closeDrawer(): void {
    this.drawerOpen.set(false);
    this.deleteArmed.set(false);
  }

  async save(): Promise<void> {
    const editing = this.editing();
    if (!this.username().trim() || !this.storeName().trim() || !this.reason().trim()) {
      this.error.set('登录账号、门店名称和操作原因必填');
      return;
    }
    if (!editing && !this.password()) {
      this.error.set('新增门店必须设置初始密码');
      return;
    }
    this.saving.set(true);
    this.error.set('');
    try {
      await this.operations.mutate(
        editing ? 'ops/stores/update' : 'ops/stores/create',
        editing?.objectId || '',
        this.reason(),
        {
          username: this.username().trim(),
          password: this.password(),
          storeName: this.storeName().trim(),
          contactName: this.contactName().trim(),
          mobile: this.mobile().trim(),
          parentStoreId: this.parentStoreId(),
          disabled: this.disabled(),
        },
        editing?.updatedAt || '',
      );
      this.message.set(editing ? '门店资料已更新' : '门店已新增');
      this.closeDrawer();
      await this.load(editing ? this.page()?.page || 1 : 1);
    } catch (error) {
      this.error.set(error instanceof Error ? error.message : '门店资料保存失败');
    } finally {
      this.saving.set(false);
    }
  }

  async remove(): Promise<void> {
    const editing = this.editing();
    if (!editing) return;
    if (!this.reason().trim()) {
      this.error.set('删除前必须填写操作原因');
      return;
    }
    if (!this.deleteArmed()) {
      this.deleteArmed.set(true);
      return;
    }
    this.saving.set(true);
    this.error.set('');
    try {
      await this.operations.mutate('ops/stores/delete', editing.objectId, this.reason(), {}, editing.updatedAt);
      this.message.set('门店已删除，历史业务数据仍保留');
      this.closeDrawer();
      await this.load(1);
    } catch (error) {
      this.error.set(error instanceof Error ? error.message : '门店删除失败');
    } finally {
      this.saving.set(false);
    }
  }
}