import { HomeHeader } from "@/components/home-header";
import { LeagueModal } from "@/components/league-modal";
import { SelectionModal } from "@/components/selection-modal";
import { ThemedText } from "@/components/themed-text";
import { ThemedView } from "@/components/themed-view";
import { IconSymbol } from "@/components/ui/icon-symbol";
import { UpcomingMatchCard } from "@/components/upcoming-match-card";
import { Colors } from "@/constants/theme";
import { useTheme } from "@/context/ThemeContext";
import {
  checkFavorite,
  fetchLeagues,
  fetchSports,
  fetchUpcomingMatches,
} from "@/lib/api";
import { storage } from "@/lib/storage";
import { League, Sport, UpcomingMatch } from "@/types/api";
import React, { useEffect, useState } from "react";
import { useTranslation } from "react-i18next";
import {
  ActivityIndicator,
  FlatList,
  StyleSheet,
  TouchableOpacity,
  View,
} from "react-native";

export default function HomeScreen() {
  const { theme } = useTheme();
  const { t } = useTranslation();
  const isDark = theme === "dark";
  const iconColor = isDark ? Colors.dark.icon : Colors.light.icon;
  const filterBg = isDark ? "#2C2C2E" : "#F2F2F7";

  const [sports, setSports] = useState<Sport[]>([]);
  const [leagues, setLeagues] = useState<League[]>([]);
  const [matches, setMatches] = useState<UpcomingMatch[]>([]);
  const [loading, setLoading] = useState(true);
  const [loadingLeagues, setLoadingLeagues] = useState(false);

  // Selection States
  // 默认足球
  const [selectedSportId, setSelectedSportId] = useState<number | null>(1);
  const [selectedLeagueKey, setSelectedLeagueKey] = useState<string>(""); // 默认空字符串

  // Modal Visibilities
  const [showSportModal, setShowSportModal] = useState(false);
  const [showLeagueModal, setShowLeagueModal] = useState(false);

  // Load Sports and Leagues
  useEffect(() => {
    loadSports();
    loadLeagues();
  }, []);

  // Load Matches when sport or league changes
  useEffect(() => {
    if (selectedSportId !== null) {
      loadMatches();
    }
  }, [selectedSportId, selectedLeagueKey]);

  // Load Leagues when sport changes
  useEffect(() => {
    if (selectedSportId !== null) {
      loadLeagues();
    }
  }, [selectedSportId]);

  const loadSports = async () => {
    try {
      const apiList = await fetchSports();
      // 创建8个运动的完整列表
      const defaultSports: Sport[] = [
        {
          id: 1,
          name: "football",
          description: "",
          icon: "",
          isActive: true,
          updatedAt: "",
          createdAt: "",
        },
        {
          id: 2,
          name: "basketball",
          description: "",
          icon: "",
          isActive: true,
          updatedAt: "",
          createdAt: "",
        },
        {
          id: 3,
          name: "tennis",
          description: "",
          icon: "",
          isActive: true,
          updatedAt: "",
          createdAt: "",
        },
        {
          id: 4,
          name: "cricket",
          description: "",
          icon: "",
          isActive: true,
          updatedAt: "",
          createdAt: "",
        },
        {
          id: 5,
          name: "baseball",
          description: "",
          icon: "",
          isActive: true,
          updatedAt: "",
          createdAt: "",
        },
        {
          id: 6,
          name: "badminton",
          description: "",
          icon: "",
          isActive: true,
          updatedAt: "",
          createdAt: "",
        },
        {
          id: 7,
          name: "snooker",
          description: "",
          icon: "",
          isActive: true,
          updatedAt: "",
          createdAt: "",
        },
        {
          id: 8,
          name: "volleyball",
          description: "",
          icon: "",
          isActive: true,
          updatedAt: "",
          createdAt: "",
        },
      ];

      // 合并API返回的运动和默认列表
      const sportsMap = new Map<number, Sport>();
      apiList.forEach((sport) => {
        sportsMap.set(sport.id, sport);
      });

      // 补充默认运动到8个
      defaultSports.forEach((sport) => {
        if (!sportsMap.has(sport.id)) {
          sportsMap.set(sport.id, sport);
        }
      });

      const allSports = Array.from(sportsMap.values())
        .sort((a, b) => a.id - b.id)
        .slice(0, 8);

      setSports(allSports);
    } catch (e) {
      console.error(e);
      // API失败时使用默认8个运动
      const defaultSports: Sport[] = [
        {
          id: 1,
          name: "football",
          description: "",
          icon: "",
          isActive: true,
          updatedAt: "",
          createdAt: "",
        },
        {
          id: 2,
          name: "basketball",
          description: "",
          icon: "",
          isActive: true,
          updatedAt: "",
          createdAt: "",
        },
        {
          id: 3,
          name: "tennis",
          description: "",
          icon: "",
          isActive: true,
          updatedAt: "",
          createdAt: "",
        },
        {
          id: 4,
          name: "cricket",
          description: "",
          icon: "",
          isActive: true,
          updatedAt: "",
          createdAt: "",
        },
        {
          id: 5,
          name: "baseball",
          description: "",
          icon: "",
          isActive: true,
          updatedAt: "",
          createdAt: "",
        },
        {
          id: 6,
          name: "badminton",
          description: "",
          icon: "",
          isActive: true,
          updatedAt: "",
          createdAt: "",
        },
        {
          id: 7,
          name: "snooker",
          description: "",
          icon: "",
          isActive: true,
          updatedAt: "",
          createdAt: "",
        },
        {
          id: 8,
          name: "volleyball",
          description: "",
          icon: "",
          isActive: true,
          updatedAt: "",
          createdAt: "",
        },
      ];
      setSports(defaultSports);
      setSelectedSportId(1);
    }
  };

  // 加载联赛
  const loadLeagues = async () => {
    try {
      if (selectedSportId !== null) {
        setLoadingLeagues(true);
        const list = await fetchLeagues(selectedSportId, "");
        setLeagues(list);
      }
    } catch (e) {
      console.error(e);
    } finally {
      setLoadingLeagues(false);
    }
  };

  const loadMatches = async () => {
    const token = await storage.getAccessToken();
    if (selectedSportId === null || !token) return;

    setLoading(true);
    try {
      // 使用 fetchUpcomingMatches，默认 leagueKey 为空字符串
      const list = await fetchUpcomingMatches(
        selectedSportId,
        selectedLeagueKey || ""
      );

      const token = await storage.getAccessToken();
      let listWithFavStatus = list;

      if (token) {
        // 直接传递 match.id 查询是否收藏，并更新列表状态
        listWithFavStatus = await Promise.all(
          list.map(async (m) => {
            try {
              const favRes = await checkFavorite("match", m.id.toString());
              return { ...m, fav: favRes.isFavorite };
            } catch (error) {
              console.error(`Check favorite failed for match ${m.id}:`, error);
              return m;
            }
          })
        );
      }

      // 将收藏的比赛置顶
      const sortedList = [...listWithFavStatus].sort((a, b) => {
        if (a.fav === b.fav) return 0;
        return a.fav ? -1 : 1;
      });
      setMatches(sortedList);
    } catch (e) {
      console.error(e);
    } finally {
      setLoading(false);
    }
  };

  const handleFavoriteToggle = (matchId: string, isFav: boolean) => {
    setMatches((prev) => {
      const updated = prev.map((m) =>
        m.id.toString() === matchId ? { ...m, fav: isFav } : m
      );
      return [...updated].sort((a, b) => {
        if (a.fav === b.fav) return 0;
        return a.fav ? -1 : 1;
      });
    });
  };

  const currentSport = sports.find((s) => s.id === selectedSportId);

  // 获取当前运动的国际化名称
  const getSportName = (sport: Sport | undefined): string => {
    if (!sport) return t("home.select_sport");
    const sportKeyMap: { [key: number]: string } = {
      1: "football",
      2: "basketball",
      3: "tennis",
      4: "cricket",
      5: "baseball",
      6: "badminton",
      7: "snooker",
      8: "volleyball",
    };
    const sportKey = sportKeyMap[sport.id] || sport.name.toLowerCase();
    return t(`sports.${sportKey}`, { defaultValue: sport.name });
  };

  const handleLeagueSelect = (leagueKey: string) => {
    setSelectedLeagueKey(leagueKey);
    console.log("Selected league:", leagueKey);
  };

  const renderHeader = () => (
    <View style={styles.filterContainer}>
      {/* League Filter (Fixed) */}
      <TouchableOpacity
        style={[styles.filterBtn, { backgroundColor: filterBg }]}
        disabled
      >
        <IconSymbol name="trophy-outline" size={18} color={iconColor} />
        <ThemedText style={styles.filterText}>{t("home.league")}</ThemedText>
      </TouchableOpacity>

      {/* Sport Selector */}
      <TouchableOpacity
        style={[
          styles.filterBtn,
          styles.mainFilterBtn,
          { backgroundColor: filterBg },
        ]}
        onPress={() => setShowSportModal(true)}
      >
        <IconSymbol name="football-outline" size={18} color={iconColor} />
        <ThemedText style={styles.filterText}>
          {getSportName(currentSport)}
        </ThemedText>
      </TouchableOpacity>

      {/* League Selector */}
      <TouchableOpacity
        style={[styles.filterBtn, { backgroundColor: filterBg }]}
        onPress={() => {
          // 立即显示弹窗
          setShowLeagueModal(true);
          // 如果联赛列表为空，立即设置loading状态并加载
          if (selectedSportId !== null) {
            if (leagues.length === 0) {
              setLoadingLeagues(true);
            }
            loadLeagues();
          }
        }}
      >
        <IconSymbol name="trophy-outline" size={18} color={iconColor} />
        <ThemedText style={styles.filterText} numberOfLines={1}>
          {selectedLeagueKey
            ? leagues.find((l) => l.key === selectedLeagueKey)?.name ||
              t("home.select_league")
            : t("home.all_leagues")}
        </ThemedText>
      </TouchableOpacity>
    </View>
  );

  return (
    <ThemedView style={styles.container}>
      <HomeHeader />

      {renderHeader()}

      {loading ? (
        <View style={styles.center}>
          <ActivityIndicator size="large" color={Colors[theme].tint} />
          <ThemedText style={{ marginTop: 10 }}>{t("home.loading")}</ThemedText>
        </View>
      ) : (
        <FlatList
          data={matches}
          keyExtractor={(item) => item.id.toString()}
          renderItem={({ item }) => (
            <UpcomingMatchCard
              match={item}
              onFavoriteToggle={handleFavoriteToggle}
            />
          )}
          contentContainerStyle={styles.listContent}
          ListEmptyComponent={
            <View style={styles.center}>
              <ThemedText>{t("home.no_matches")}</ThemedText>
            </View>
          }
        />
      )}

      {/* Modals */}
      <SelectionModal
        visible={showSportModal}
        onClose={() => setShowSportModal(false)}
        title={t("home.select_sport")}
        options={sports.map((s) => {
          const sportKeyMap: { [key: number]: string } = {
            1: "football",
            2: "basketball",
            3: "tennis",
            4: "cricket",
            5: "baseball",
            6: "badminton",
            7: "snooker",
            8: "volleyball",
          };
          const sportKey = sportKeyMap[s.id] || s.name.toLowerCase();
          return {
            id: s.id,
            label: s.name, // 保留原始名称用于图标识别
            value: s.id,
            icon: s.icon,
          };
        })}
        selectedValue={selectedSportId}
        onSelect={setSelectedSportId}
      />

      <LeagueModal
        visible={showLeagueModal}
        onClose={() => setShowLeagueModal(false)}
        leagues={leagues}
        selectedLeagueKey={selectedLeagueKey}
        loading={loadingLeagues}
        onSelect={handleLeagueSelect}
      />
    </ThemedView>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
  },
  center: {
    flex: 1,
    justifyContent: "center",
    alignItems: "center",
    paddingTop: 50,
  },
  filterContainer: {
    flexDirection: "row",
    paddingHorizontal: 16,
    paddingVertical: 12,
    gap: 12,
  },
  filterBtn: {
    flex: 1,
    height: 44, // Increased from 36
    flexDirection: "column", // Stacked logic for Date, or Row for others
    justifyContent: "center",
    alignItems: "center",
    borderRadius: 8, // Rounded corners
    // iOS shadow
    shadowColor: "#000",
    shadowOffset: { width: 0, height: 1 },
    shadowOpacity: 0.1,
    shadowRadius: 2,
    // Android elevation
    elevation: 2,
  },
  mainFilterBtn: {
    flex: 2, // Wider for sport
    flexDirection: "row",
    gap: 8,
  },
  filterText: {
    fontSize: 14,
    fontWeight: "500",
  },
  dateDayText: {
    fontSize: 16,
    fontWeight: "bold",
  },
  dateMonthText: {
    fontSize: 10,
    opacity: 0.6,
  },
  listContent: {
    padding: 16,
    paddingTop: 8,
  },
});