import { ChangeDetectionStrategy, Component, EventEmitter, Input, Output } from '@angular/core';
import { CommonModule } from '@angular/common';
import { RouterLink } from '@angular/router';
import type { ListingDimension, ListingOverviewDirection, ListingOverviewRow, ListingOverviewSort } from '../../models/listing-ai.models';

@Component({
  selector: 'app-listing-overview-table',
  standalone: true,
  imports: [CommonModule, RouterLink],
  templateUrl: './listing-overview-table.component.html',
  styleUrl: './listing-overview-table.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
})
export class ListingOverviewTableComponent {
  @Input() items: ListingOverviewRow[] = [];
  @Input() loading = false;
  @Input() nextCursor: string | null = null;
  @Input() currentCursor: string | undefined;
  @Input() sort: ListingOverviewSort = 'improvementPotential';
  @Input() direction: ListingOverviewDirection = 'desc';
  @Input() returnTo = '/listing-ai/overview';
  @Output() nextPage = new EventEmitter<void>();
  @Output() firstPage = new EventEmitter<void>();
  @Output() sortChange = new EventEmitter<{ sort: ListingOverviewSort; direction: ListingOverviewDirection }>();
  @Output() detailOpen = new EventEmitter<void>();

  readonly dimensions: Array<{ key: ListingDimension; label: string }> = [
    { key: 'title', label: '标题' }, { key: 'selling_points', label: '卖点' }, { key: 'images', label: '图片' },
    { key: 'description', label: '详情' }, { key: 'specifications', label: '规格' },
  ];
  readonly dimensionLabels: Record<ListingDimension, string> = {
    title: '商品标题', selling_points: '核心卖点', images: '图片资产', description: '商品详情', specifications: '规格与履约',
  };

  toggleSort(sort: ListingOverviewSort): void {
    this.sortChange.emit({ sort, direction: this.sort === sort && this.direction === 'desc' ? 'asc' : 'desc' });
  }

  sortIndicator(sort: ListingOverviewSort): string {
    return this.sort === sort ? (this.direction === 'asc' ? '↑' : '↓') : '';
  }

  overallText(item: ListingOverviewRow): string {
    if (item.overallScore !== null) return `${item.overallScore}`;
    return item.scoreNature === 'unscored' ? '未评分' : '总分缺失';
  }

  dimensionText(item: ListingOverviewRow, key: ListingDimension): string {
    const dimension = item.dimensions[key];
    return dimension.score === null ? '空维度' : `${dimension.score}/${dimension.maxScore}`;
  }

  rateText(rate: number | null): string {
    return rate === null ? '得分率未知' : `${Math.round(rate * 1000) / 10}%`;
  }
}