// 老人端 · 膳食推荐（ArkTS 严格类型，无 any）
// 接口：GET /elderly-portal/recommendations/
import { router } from '@kit.ArkUI';
import { promptAction } from '@kit.ArkUI';
import { HdsNavigation, HdsNavigationTitleMode, ScrollEffectType } from '@kit.UIDesignKit';
import { hdsMaterial } from '@hms.hds.hdsMaterial';
import { BusinessError } from '@kit.BasicServicesKit';
import { normalizeError } from '../../common/ApiConstants';
import { api, RequestError } from '../../utils/Request';
import { FontScaleLevel, FONT_SCALE_MAP } from '../../utils/FontScale';

interface Recommendation {
  id: number;
  service_date: string;
  meal_period: string;
  dish_name: string;
  price: string;
  reason: string;
}

interface RecommendationsResponse {
  elderly_id: number | null;
  recommendations: Array<Recommendation>;
}

function periodIcon(period: string): string {
  if (period === '早餐') {
    return '🌅';
  }
  if (period === '午餐') {
    return '🍚';
  }
  return '🌙';
}

function periodColor(period: string): string {
  if (period === '早餐') {
    return '#FF9500';
  }
  if (period === '午餐') {
    return '#007AFF';
  }
  return '#34C759';
}

function formatDateLabel(dateStr: string): string {
  if (!dateStr || dateStr.length === 0) {
    return '';
  }
  const parts: Array<string> = dateStr.split('-');
  if (parts.length !== 3) {
    return dateStr;
  }
  const month = parseInt(parts[1], 10);
  const day = parseInt(parts[2], 10);
  return `${month}月${day}日`;
}

function isToday(dateStr: string): boolean {
  if (!dateStr || dateStr.length === 0) {
    return false;
  }
  const now = new Date();
  const mm = String(now.getMonth() + 1).padStart(2, '0');
  const dd = String(now.getDate()).padStart(2, '0');
  return dateStr === `${now.getFullYear()}-${mm}-${dd}`;
}

@Entry
@Component
struct ElderlyRecommendations {
  @StorageProp('fontScale') fontScaleLevel: FontScaleLevel = 'system';
  @State recommendations: Array<Recommendation> = [];
  @State loading: boolean = true;

  private scroller: Scroller = new Scroller();

  private scaleFor(): number {
    return FONT_SCALE_MAP[this.fontScaleLevel] ?? 1.0;
  }

  aboutToAppear(): void {
    this.load();
  }

  private async load(): Promise<void> {
    this.loading = true;
    try {
      const res = await api.get<RecommendationsResponse>('/elderly-portal/recommendations/');
      this.recommendations = res.recommendations;
    } catch (err) {
      const message = err instanceof RequestError ? err.message : normalizeError(err as BusinessError | Error);
      promptAction.showToast({ message: message });
    } finally {
      this.loading = false;
    }
  }

  @Builder
  RecommendCard(item: Recommendation) {
    Column({ space: 8 }) {
      Row({ space: 10 }) {
        Text(periodIcon(item.meal_period))
          .fontSize(Math.round(24 * this.scaleFor()))
        Text(`${item.meal_period} · ${isToday(item.service_date) ? '今日' : formatDateLabel(item.service_date)}`)
          .fontSize(Math.round(17 * this.scaleFor()))
          .fontWeight(FontWeight.Bold)
          .fontColor($r('app.color.text_primary'))
        Blank()
        Text(`¥${item.price}`)
          .fontSize(Math.round(16 * this.scaleFor()))
          .fontWeight(FontWeight.Bold)
          .fontColor('#FF9500')
      }
      .width('100%')

      Text(item.dish_name)
        .fontSize(Math.round(20 * this.scaleFor()))
        .fontWeight(FontWeight.Medium)
        .fontColor(periodColor(item.meal_period))
        .width('100%')

      if (item.reason && item.reason.length > 0) {
        Text(item.reason)
          .fontSize(Math.round(15 * this.scaleFor()))
          .fontColor($r('app.color.text_secondary'))
          .lineHeight(22)
          .width('100%')
      }
    }
    .width('100%')
    .padding(16)
    .backgroundColor($r('app.color.background_card'))
    .borderRadius(18)
    .alignItems(HorizontalAlign.Start)
  }

  build() {
    HdsNavigation() {
      Column() {
        Scroll(this.scroller) {
          Column({ space: 12 }) {
            if (this.loading) {
              Text('加载中...')
                .fontSize(Math.round(16 * this.scaleFor()))
                .fontColor($r('app.color.inactive_tab'))
                .margin({ top: 40 })
            } else if (this.recommendations.length === 0) {
              Column({ space: 8 }) {
                Text('暂无膳食推荐')
                  .fontSize(Math.round(20 * this.scaleFor()))
                  .fontWeight(FontWeight.Bold)
                  .fontColor($r('app.color.text_primary'))
                Text('护理团队会根据您的健康状况推送个性化餐食建议')
                  .fontSize(Math.round(15 * this.scaleFor()))
                  .fontColor($r('app.color.text_secondary'))
                  .textAlign(TextAlign.Center)
              }
              .width('100%')
              .padding(24)
              .backgroundColor($r('app.color.background_card'))
              .borderRadius(16)
              .alignItems(HorizontalAlign.Center)
            } else {
              ForEach(this.recommendations, (item: Recommendation) => {
                Column() {
                  this.RecommendCard(item)
                }
                .width('100%')
              }, (item: Recommendation) => String(item.id))
            }
          }
          .width('100%')
          .padding({ left: 16, right: 16, top: 92, bottom: 30 })
        }
        .width('100%')
        .layoutWeight(1)
        .scrollBar(BarState.Auto)
        .edgeEffect(EdgeEffect.Spring)
      }
      .width('100%')
      .height('100%')
    }
    .mode(NavigationMode.Stack)
    .titleBar({
      content: {
        title: {
          mainTitle: '膳食推荐',
        },
      },
      style: {
        scrollEffectOpts: {
          enableScrollEffect: false,
          scrollEffectType: ScrollEffectType.GRADIENT_BLUR,
        },
        systemMaterialEffect: {
          materialType: hdsMaterial.MaterialType.ADAPTIVE,
          materialLevel: hdsMaterial.MaterialLevel.EXQUISITE,
        },
      },
      avoidLayoutSafeArea: false,
      enableComponentSafeArea: false,
    })
    .bindToScrollable([this.scroller])
    .hideBackButton(false)
    .titleMode(HdsNavigationTitleMode.MINI)
    .ignoreLayoutSafeArea([LayoutSafeAreaType.SYSTEM], [LayoutSafeAreaEdge.TOP, LayoutSafeAreaEdge.BOTTOM])
    .expandSafeArea([SafeAreaType.SYSTEM], [SafeAreaEdge.TOP, SafeAreaEdge.BOTTOM])
    .backgroundColor($r('app.color.background'))
  }
}