import 'package:didvan/constants/assets.dart';
import 'package:didvan/models/enums.dart';
import 'package:didvan/models/new_statistic/new_statistics_model.dart';
import 'package:didvan/providers/core.dart';
import 'package:didvan/services/content/content_service.dart';
import 'package:didvan/services/market/statista_market_service.dart';
import 'package:didvan/views/home/new_statistic/widgets/statistic_cat.dart';
import 'dart:async';

import 'package:flutter/foundation.dart';

class NewStatisticState extends CoreProvier {
  final List<CategoryList> contents = [];
  DateTime? generatedAt;
  String? errorMessage;

  /// Signed URL of the «نبض صنعت» banner, managed from the panel
  /// (`/panel/market-symbols`). Null while loading or when unset.
  String? bannerUrl;

  /// Title of the content-category that holds the banner. Resolved by title so
  /// no UUID needs to be hardcoded — the panel creates it on first upload.
  static const String _bannerCategoryTitle = 'بنر نبض صنعت';
  static String? _cachedBannerCategoryId;

  Future<void> getBanner() async {
    try {
      final categoryId = await _resolveBannerCategoryId();
      if (categoryId == null) return;

      final res = await ContentService.instance.getContents(
        page: 1,
        limit: 1,
        categoryId: categoryId,
        sortBy: const [MapEntry('createdAt', 'DESC')],
      );
      if (!res.isSuccess || res.data == null || res.data!.data.isEmpty) {
        bannerUrl = null;
        notifyListeners();
        return;
      }

      final first = res.data!.data.first;
      var cover = first.coverImage;
      if (cover == null || cover.isEmpty) {
        // The list endpoint does not always sign the cover; the detail one does.
        final detail = await ContentService.instance.getContent(first.id);
        if (detail.isSuccess && detail.data != null) {
          cover = detail.data!.coverImage;
        }
      }
      bannerUrl = (cover != null && cover.isNotEmpty) ? cover : null;
      notifyListeners();
    } catch (e) {
      debugPrint('industry pulse banner failed: $e');
    }
  }

  Future<String?> _resolveBannerCategoryId() async {
    if (_cachedBannerCategoryId != null) return _cachedBannerCategoryId;
    final res = await ContentService.instance.getCategories(limit: 100);
    if (!res.isSuccess || res.data == null) return null;
    for (final c in res.data!) {
      if (c.name == _bannerCategoryTitle && c.id != null) {
        _cachedBannerCategoryId = c.id;
        return c.id;
      }
    }
    return null;
  }

  List<StatMenuItemType> statCat = [];

  Future<void> getStatistic() async {
    appState = AppState.busy;
    errorMessage = null;

    // Banner is independent of the price feed — fire and forget.
    unawaited(getBanner());

    final result = await StatistaMarketService.instance.getLatestPrices();

    if (result.isSuccess) {
      contents
        ..clear()
        ..addAll(result.categories);
      generatedAt = result.generatedAt;
      appState = AppState.idle;
      return;
    }

    contents.clear();
    errorMessage = result.errorMessage;
    appState = AppState.idle;
  }

  void init() {
    statCat = [
      StatMenuItemType(
          label: "بازار ارز و طلا", asset: Assets.currencyGoldStatCat, id: 1),
      StatMenuItemType(
          label: "ارزهای دیجیتال", asset: Assets.cryptoStatCat, id: 2),
      StatMenuItemType(label: "فلزات پایه", asset: Assets.metalStatCat, id: 3),
      StatMenuItemType(
          label: "کامودیتی‌ها", asset: Assets.commodityStatCat, id: 4),
      StatMenuItemType(label: "صنعت فولاد", asset: Assets.steelStatCat, id: 5),
      StatMenuItemType(
          label: "بازار سرمایه", asset: Assets.stockStatCat, id: 6),
    ];
    Future.delayed(Duration.zero, () {
      getStatistic();
    });
  }

  void refresh() {
    statCat = [
      StatMenuItemType(
          label: "بازار ارز و طلا", asset: Assets.currencyGoldStatCat, id: 1),
      StatMenuItemType(
          label: "ارزهای دیجیتال", asset: Assets.cryptoStatCat, id: 2),
      StatMenuItemType(label: "فلزات پایه", asset: Assets.metalStatCat, id: 3),
      StatMenuItemType(
          label: "کامودیتی‌ها", asset: Assets.commodityStatCat, id: 4),
      StatMenuItemType(label: "صنعت فولاد", asset: Assets.steelStatCat, id: 5),
      StatMenuItemType(
          label: "بازار سرمایه", asset: Assets.stockStatCat, id: 6),
    ];
    update();
  }

  void resetState() {
    contents.clear();
    notifyListeners();
    getStatistic();
  }
}