import { CommonModule } from '@angular/common';
import { ChangeDetectionStrategy, Component, OnInit, computed, inject, signal } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { CheckCircle2, CircleAlert, CloudCog, Database, LoaderCircle, LucideAngularModule } from 'lucide-angular';
import { AppMigrationStatus } from '../admin.models';
import { CloudFunctionsService } from '../cloud-functions.service';
import { LEGACY_ADMIN_COVERAGE, LegacyAdminCoverageStatus } from '../legacy-admin-coverage.generated';

interface MigrationMeta {
  classes: number;
  cloudFunctions: number;
  identity: { company?: unknown; isSuperAdmin: boolean };
}

@Component({
  selector: 'app-admin-migration',
  standalone: true,
  imports: [CommonModule, FormsModule, LucideAngularModule],
  templateUrl: './admin-migration.component.html',
  styleUrl: './admin-migration.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
})
export class AdminMigrationComponent implements OnInit {
  readonly meta = signal<MigrationMeta | null>(null);
  readonly appStatus = signal<AppMigrationStatus | null>(null);
  readonly blockedEntries = computed(() => Object.entries(this.appStatus()?.blocked ?? {}).sort(([left], [right]) => left.localeCompare(right)));
  readonly adminSearch = signal('');
  readonly adminStatusFilter = signal<'all' | LegacyAdminCoverageStatus>('all');
  readonly adminCounts = computed(() => LEGACY_ADMIN_COVERAGE.reduce((counts, entry) => { counts[entry.status] += 1; return counts; }, { implemented: 0, partial: 0, 'blocked-data': 0, 'blocked-infrastructure': 0, pending: 0 } as Record<LegacyAdminCoverageStatus, number>));
  readonly filteredAdminCoverage = computed(() => {
    const keyword = this.adminSearch().trim().toLocaleLowerCase();
    const status = this.adminStatusFilter();
    return LEGACY_ADMIN_COVERAGE.filter((entry) => (status === 'all' || entry.status === status) && (!keyword || `${entry.module} ${entry.action} ${entry.reason}`.toLocaleLowerCase().includes(keyword)));
  });
  readonly error = signal('');
  readonly icons = { CheckCircle2, CircleAlert, CloudCog, Database, LoaderCircle };
  readonly rewrites = [
    ['内容 HTML 规范化', 'cms.content-normalizer', 'implemented'],
    ['购物车投影', '/xiaoshu/cms/cart/items', 'blocked'],
    ['用户扩展资料', '/xiaoshu/cms/users/extended', 'implemented'],
    ['考试班级投影', '/xiaoshu/cms/exams/classes', 'implemented'],
    ['互动社区投影', '/xiaoshu/cms/guest/bar', 'implemented'],
    ['已支付订单', '/xiaoshu/cms/orders/paid', 'blocked'],
    ['商品销售投影', '/xiaoshu/cms/orders/product-sales', 'blocked'],
    ['订单分享投影', '/xiaoshu/cms/orders/share', 'blocked'],
    ['博客列表', '/xiaoshu/cms/blogs', 'blocked'],
    ['统一内容搜索', '/xiaoshu/cms/search', 'implemented'],
    ['用户平台资料', '/xiaoshu/cms/users/platform', 'implemented'],
    ['用户微信资料', '/xiaoshu/cms/users/wechat', 'implemented'],
  ] as const;
  private readonly functions = inject(CloudFunctionsService);

  adminStatusLabel(status: LegacyAdminCoverageStatus): string {
    return ({ implemented: '已实现', partial: '部分实现', 'blocked-data': '数据阻塞', 'blocked-infrastructure': '基础设施阻塞', pending: '待核验' })[status];
  }

  async ngOnInit(): Promise<void> {
    try {
      const [meta, appStatus] = await Promise.all([
        this.functions.admin<MigrationMeta>('meta'),
        this.functions.app<AppMigrationStatus>('migration_status'),
      ]);
      this.meta.set(meta);
      this.appStatus.set(appStatus);
    }
    catch (error) { this.error.set(error instanceof Error ? error.message : '迁移状态加载失败'); }
  }
}