import { ref, computed } from 'vue';
import { useI18n } from 'vue-i18n';
import api from '../api';
import type { BannerItem } from '../components/BannerCarousel.vue';
import { resolveBanners } from '../constants/defaultBanner';
import { resolveAnnouncements } from '../constants/defaultAnnouncement';
import { stripHtml } from '../utils/html';

export interface PlayerHomeMatch {
  id: string;
  leagueName?: string;
  leagueLogoUrl?: string | null;
  homeTeamName: string;
  awayTeamName: string;
  homeTeamCode?: string;
  awayTeamCode?: string;
  homeTeamLogoUrl?: string | null;
  awayTeamLogoUrl?: string | null;
  startTime: string;
  isHot?: boolean;
  displayOrder?: number;
}

export interface PlayerContentItem {
  id: string;
  contentType?: string;
  sortOrder?: number;
  createdAt?: string;
  linkType?: string | null;
  linkTarget?: string | null;
  translation?: {
    title?: string | null;
    body?: string | null;
    imageUrl?: string | null;
  };
}

export type PlayerAnnouncementItem = PlayerContentItem;

interface HomePayload {
  banners?: PlayerContentItem[];
  announcements?: PlayerAnnouncementItem[];
  ticker?: PlayerAnnouncementItem[];
  notices?: PlayerAnnouncementItem[];
  hotMatches?: PlayerHomeMatch[];
  upcomingMatches?: PlayerHomeMatch[];
  inboxEnabled?: boolean;
}

function mergeMatchList(
  existing: PlayerHomeMatch[] | undefined,
  fresh: PlayerHomeMatch[] | undefined,
): PlayerHomeMatch[] | undefined {
  if (!fresh) return existing;
  if (!existing) return fresh;

  const freshMap = new Map(fresh.map((m) => [m.id, m]));
  for (const m of existing) {
    const f = freshMap.get(m.id);
    if (f) Object.assign(m, f);
  }
  const existingIds = new Set(existing.map((m) => m.id));
  for (const fm of fresh) {
    if (!existingIds.has(fm.id)) existing.push(fm);
  }
  for (let i = existing.length - 1; i >= 0; i--) {
    if (!freshMap.has(existing[i].id)) existing.splice(i, 1);
  }
  return existing;
}

const homeRaw = ref<HomePayload | null>(null);
const loading = ref(false);

function collectAnnouncementLines(data: HomePayload | null): string[] {
  if (!data) return [];
  const source =
    data.announcements && data.announcements.length > 0
      ? data.announcements
      : [...(data.ticker ?? []), ...(data.notices ?? [])];

  const lines: string[] = [];
  for (const item of source) {
    const title = item.translation?.title?.trim();
    const text = title || stripHtml(item.translation?.body ?? '');
    if (text) lines.push(text);
  }
  return lines;
}

function collectAnnouncementItems(data: HomePayload | null): PlayerAnnouncementItem[] {
  if (!data) return [];
  const source =
    data.announcements && data.announcements.length > 0
      ? data.announcements
      : [...(data.ticker ?? []), ...(data.notices ?? [])];
  return source.filter((item) => item.translation?.title || item.translation?.body);
}

function collectHubContentItems(data: HomePayload | null): PlayerContentItem[] {
  if (!data) return [];
  const seen = new Set<string>();
  const merged: PlayerContentItem[] = [];

  const pushItems = (items: PlayerContentItem[] | undefined, fallbackType?: string) => {
    for (const item of items ?? []) {
      if (!item?.id || seen.has(item.id)) continue;
      const hasContent =
        item.translation?.title?.trim() ||
        item.translation?.body?.trim() ||
        item.translation?.imageUrl?.trim();
      if (!hasContent) continue;
      seen.add(item.id);
      merged.push({
        ...item,
        contentType: item.contentType || fallbackType,
      });
    }
  };

  pushItems(data.banners, 'BANNER');
  pushItems(data.ticker, 'TICKER');
  pushItems(data.notices, 'NOTICE');
  pushItems(data.announcements);

  merged.sort((a, b) => {
    const timeA = a.createdAt ? Date.parse(a.createdAt) : 0;
    const timeB = b.createdAt ? Date.parse(b.createdAt) : 0;
    if (timeB !== timeA) return timeB - timeA;
    return (a.sortOrder ?? 0) - (b.sortOrder ?? 0);
  });
  return merged;
}

/** 管理端公共内容 → 玩家端首页/跑马灯（单例，避免重复请求） */
export function usePlayerHome() {
  const { t } = useI18n();

  async function load(force = false) {
    if (!force && homeRaw.value) return;
    loading.value = true;
    try {
      const { data } = await api.get('/player/home');
      const fresh = (data.data ?? null) as HomePayload | null;

      if (fresh && homeRaw.value) {
        // 已有数据 → 原地更新，保留对象引用，避免图片重新加载
        const existing = homeRaw.value;
        existing.banners = fresh.banners;
        existing.announcements = fresh.announcements;
        existing.ticker = fresh.ticker;
        existing.notices = fresh.notices;
        existing.inboxEnabled = fresh.inboxEnabled;

        existing.hotMatches = mergeMatchList(existing.hotMatches, fresh.hotMatches);
        existing.upcomingMatches = mergeMatchList(existing.upcomingMatches, fresh.upcomingMatches);
      } else {
        homeRaw.value = fresh;
      }
    } catch {
      homeRaw.value = null;
    } finally {
      loading.value = false;
    }
  }

  const banners = computed(() => resolveBanners(homeRaw.value?.banners as BannerItem[] | undefined));
  const bannerItems = computed(() => homeRaw.value?.banners ?? []);
  const announcements = computed(() =>
    resolveAnnouncements(collectAnnouncementLines(homeRaw.value), t('home.announcement_default')),
  );
  const announcementItems = computed(() => collectAnnouncementItems(homeRaw.value));
  const hubContentItems = computed(() => collectHubContentItems(homeRaw.value));
  const hotMatches = computed(() => homeRaw.value?.hotMatches ?? []);
  const upcomingMatches = computed(() => homeRaw.value?.upcomingMatches ?? []);

  return {
    homeRaw,
    loading,
    load,
    banners,
    bannerItems,
    announcements,
    announcementItems,
    hubContentItems,
    hotMatches,
    upcomingMatches,
  };
}