falah-mobile/src/app/halal-monitor/page.tsx

"use client";

import { useState, useEffect, useCallback, useRef } from "react";
import { useAuth } from "@/lib/AuthContext";
import { useRouter } from "next/navigation";
import {
  MapPin,
  Search,
  Heart,
  X,
  Star,
  ChevronRight,
  Sparkles,
  Crown,
  Loader2,
} from "lucide-react";

// ─── Types ────────────────────────────────────────────────────────────────
interface Place {
  id: string;
  name: string;
  address: string;
  lat: number;
  lng: number;
  rating: number;
  type: "mosque" | "restaurant" | "cafe";
  halal_certified: boolean;
}

interface UsageInfo {
  queriesUsed: number;
  queriesLimit: number;
  remaining: number;
  tier: string;
  scope: string;
}

interface Bookmark {
  id: string;
  itemId: string;
  itemType: string;
  label: string | null;
  createdAt: string;
  place: Place | null;
}

// ─── Constants ────────────────────────────────────────────────────────────
const TYPES = ["all", "mosque", "restaurant", "cafe"] as const;
const TYPE_LABELS: Record<string, string> = {
  all: "All",
  mosque: "Mosques",
  restaurant: "Restaurants",
  cafe: "Cafes",
};

// ─── Page ─────────────────────────────────────────────────────────────────
export default function HalalMonitorPage() {
  const { user, token, loading } = useAuth();
  const router = useRouter();

  const [places, setPlaces] = useState<Place[]>([]);
  const [usage, setUsage] = useState<UsageInfo | null>(null);
  const [bookmarks, setBookmarks] = useState<Bookmark[]>([]);
  const [search, setSearch] = useState("");
  const [typeFilter, setTypeFilter] = useState<string>("all");
  const [selectedPlace, setSelectedPlace] = useState<Place | null>(null);
  const [pageLoading, setPageLoading] = useState(true);
  const [usageLoading, setUsageLoading] = useState(false);
  const [mapReady, setMapReady] = useState(false);
  const mapRef = useRef<HTMLDivElement>(null);
  const mapInstanceRef = useRef<any>(null);
  const markersRef = useRef<any[]>([]);

  const isPremium = user?.isPremium || user?.isPro || false;
  const isFree = !isPremium;

  // ── Redirect if not logged in ──────────────────────────────────────────
  useEffect(() => {
    if (!loading && !token) router.push("/login");
  }, [loading, token, router]);

  // ── Fetch places ───────────────────────────────────────────────────────
  const fetchPlaces = useCallback(async (q = search, type = typeFilter) => {
    try {
      const params = new URLSearchParams();
      if (q) params.set("q", q);
      if (type && type !== "all") params.set("type", type);

      const res = await fetch(`/api/halal/places?${params.toString()}`);
      if (res.ok) {
        const data = await res.json();
        setPlaces(data.places);
      }
    } catch {
      // ignore
    }
  }, [search, typeFilter]);

  // ── Fetch usage ────────────────────────────────────────────────────────
  const fetchUsage = useCallback(async () => {
    if (!token) return;
    try {
      const res = await fetch("/mobile/api/halal/usage", {
        headers: { Authorization: `Bearer ${token}` },
      });
      if (res.ok) {
        const data = await res.json();
        setUsage(data);
      }
    } catch {
      // ignore
    }
  }, [token]);

  // ── Fetch bookmarks ────────────────────────────────────────────────────
  const fetchBookmarks = useCallback(async () => {
    if (!token) return;
    try {
      const res = await fetch("/mobile/api/halal/bookmarks", {
        headers: { Authorization: `Bearer ${token}` },
      });
      if (res.ok) {
        const data = await res.json();
        setBookmarks(data.bookmarks);
      }
    } catch {
      // ignore
    }
  }, [token]);

  // ── Track usage query ──────────────────────────────────────────────────
  const trackQuery = useCallback(async () => {
    if (!token) return;
    setUsageLoading(true);
    try {
      const res = await fetch("/mobile/api/halal/usage", {
        method: "POST",
        headers: {
          Authorization: `Bearer ${token}`,
          "Content-Type": "application/json",
        },
      });
      if (res.ok) {
        const data = await res.json();
        setUsage((prev) =>
          prev
            ? { ...prev, ...data }
            : data
        );
      } else if (res.status === 429) {
        // Rate limited — update usage from error response
        const data = await res.json();
        setUsage((prev) => prev ? { ...prev, remaining: 0 } : prev);
      }
    } catch {
      // ignore
    } finally {
      setUsageLoading(false);
    }
  }, [token]);

  // ── Initial load ───────────────────────────────────────────────────────
  useEffect(() => {
    if (loading || !token) return;

    const init = async () => {
      setPageLoading(true);
      await Promise.all([fetchPlaces(), fetchUsage(), fetchBookmarks()]);
      setPageLoading(false);
    };
    init();
  }, [loading, token, fetchPlaces, fetchUsage, fetchBookmarks]);

  // ── Search / filter triggers ───────────────────────────────────────────
  const handleSearch = useCallback(() => {
    fetchPlaces(search, typeFilter);
    if (!isFree) trackQuery();
  }, [search, typeFilter, fetchPlaces, isFree, trackQuery]);

  const handleTypeFilter = useCallback(
    (type: string) => {
      setTypeFilter(type);
      fetchPlaces(search, type);
      if (!isFree) trackQuery();
    },
    [search, fetchPlaces, isFree, trackQuery]
  );

  // ── Bookmark toggle ────────────────────────────────────────────────────
  const toggleBookmark = useCallback(
    async (place: Place) => {
      if (!token) return;
      const existing = bookmarks.find((b) => b.itemId === place.id);
      if (existing) {
        const res = await fetch(`/api/halal/bookmarks?id=${existing.id}`, {
          method: "DELETE",
          headers: { Authorization: `Bearer ${token}` },
        });
        if (res.ok) fetchBookmarks();
      } else {
        const res = await fetch("/mobile/api/halal/bookmarks", {
          method: "POST",
          headers: {
            Authorization: `Bearer ${token}`,
            "Content-Type": "application/json",
          },
          body: JSON.stringify({
            itemId: place.id,
            itemType: place.type,
            label: place.name,
          }),
        });
        if (res.ok) fetchBookmarks();
      }
    },
    [token, bookmarks, fetchBookmarks]
  );

  const isBookmarked = useCallback(
    (placeId: string) => bookmarks.some((b) => b.itemId === placeId),
    [bookmarks]
  );

  // ── Filter visible places (premium gating) ─────────────────────────────
  const visiblePlaces = isFree
    ? places.filter((p) => p.type === "mosque")
    : places;

  // ── Render stars ───────────────────────────────────────────────────────
  const renderStars = (rating: number) => {
    const full = Math.floor(rating);
    const half = rating - full >= 0.5;
    const empty = 5 - full - (half ? 1 : 0);
    return (
      <span className="inline-flex items-center gap-0.5">
        {Array.from({ length: full }, (_, i) => (
          <Star key={`full-${i}`} size={12} className="fill-amber-400 text-amber-400" />
        ))}
        {half && (
          <div className="relative">
            <Star size={12} className="text-gray-600" />
            <Star
              size={12}
              className="absolute inset-0 fill-amber-400 text-amber-400"
              style={{ clipPath: "inset(0 50% 0 0)" }}
            />
          </div>
        )}
        {Array.from({ length: empty }, (_, i) => (
          <Star key={`empty-${i}`} size={12} className="text-gray-600" />
        ))}
        <span className="text-xs text-gray-400 ml-1">{rating.toFixed(1)}</span>
      </span>
    );
  };

  // ── Premium Gating Overlay ─────────────────────────────────────────────
  if (loading) {
    return (
      <div className="min-h-dvh bg-[#0a0a0f] flex items-center justify-center">
        <div className="w-8 h-8 rounded-full border-2 border-emerald-500/30 border-t-emerald-500 animate-spin" />
      </div>
    );
  }

  if (!user) return null;

  return (
    <div className="min-h-dvh bg-[#0a0a0f] pb-24">
      {/* ── Header ─────────────────────────────────────────────────────── */}
      <div className="px-4 pt-6 pb-4">
        <div className="flex items-center justify-between mb-2">
          <h1 className="text-xl font-bold text-white flex items-center gap-2">
            <MapPin size={20} className="text-emerald-400" />
            Halal Monitor
          </h1>
          {usage && (
            <div className="flex items-center gap-2">
              <div className="text-right">
                <p className="text-xs text-gray-500">Today</p>
                <p className="text-xs font-semibold text-gray-300">
                  {usage.remaining}/{usage.queriesLimit}
                </p>
              </div>
              <div className="w-16 h-1.5 bg-gray-800 rounded-full overflow-hidden">
                <div
                  className="h-full rounded-full transition-all duration-500"
                  style={{
                    width: `${Math.min(100, ((usage?.queriesUsed ?? 0) / (usage?.queriesLimit ?? 10)) * 100)}%`,
                    backgroundColor:
                      (usage?.remaining ?? 0) <= 2 ? "#ef4444" : "#10b981",
                  }}
                />
              </div>
            </div>
          )}
        </div>
        <p className="text-xs text-gray-500">
          Discover halal-certified places around you
        </p>

        {/* ── Premium Upgrade Banner ──────────────────────────────────── */}
        {isFree && (
          <button
            onClick={() => router.push("/upgrade")}
            className="mt-3 flex items-center justify-between glass-gold rounded-2xl px-4 py-3 w-full active:opacity-80 transition"
          >
            <div className="flex items-center gap-3">
              <div className="w-8 h-8 rounded-full bg-emerald-500/20 flex items-center justify-center">
                <Sparkles size={16} className="text-emerald-400" />
              </div>
              <div className="text-left">
                <p className="text-sm font-semibold text-emerald-400">
                  Upgrade for Unlimited
                </p>
                <p className="text-xs text-gray-500">
                  Unlock restaurants + cafes & unlimited queries
                </p>
              </div>
            </div>
            <ChevronRight size={16} className="text-emerald-400" />
          </button>
        )}

        {/* Free user scope notice */}
        {isFree && (
          <div className="mt-2 flex items-center gap-1.5 text-xs text-amber-400/70">
            <Crown size={12} />
            Free tier: mosques only &bull; 10 queries/day
          </div>
        )}
      </div>

      {/* ── Search Bar ─────────────────────────────────────────────────── */}
      <div className="px-4 mb-3">
        <div className="flex items-center gap-2 bg-[#111118] border border-gray-800/60 rounded-2xl px-4 py-3">
          <Search size={16} className="text-gray-500 shrink-0" />
          <input
            type="text"
            placeholder="Search halal places..."
            value={search}
            onChange={(e) => setSearch(e.target.value)}
            onKeyDown={(e) => e.key === "Enter" && handleSearch()}
            className="flex-1 bg-transparent text-sm text-white placeholder-gray-600 outline-none"
          />
          {search && (
            <button onClick={() => { setSearch(""); fetchPlaces("", typeFilter); }}>
              <X size={14} className="text-gray-500" />
            </button>
          )}
        </div>
      </div>

      {/* ── Category Filter ────────────────────────────────────────────── */}
      <div className="px-4 mb-4 overflow-x-auto">
        <div className="flex gap-2 min-w-max pb-1">
          {TYPES.map((t) => {
            const active = typeFilter === t;
            const isDisabled = isFree && t !== "all" && t !== "mosque";
            return (
              <button
                key={t}
                disabled={isDisabled}
                onClick={() => handleTypeFilter(t)}
                className={`px-3.5 py-1.5 rounded-full text-xs font-medium transition-all shrink-0 ${
                  active
                    ? "bg-emerald-500/20 text-emerald-300 border border-emerald-500/40"
                    : isDisabled
                    ? "bg-gray-900 text-gray-600 border border-gray-800/40 cursor-not-allowed opacity-50"
                    : "bg-[#111118] text-gray-400 border border-gray-800/60 hover:border-gray-700"
                }`}
              >
                {TYPE_LABELS[t]}
              </button>
            );
          })}
        </div>
      </div>

      {/* ── Map Placeholder ────────────────────────────────────────────── */}
      <div className="mx-4 mb-4">
        <div
          ref={mapRef}
          className="w-full h-48 rounded-2xl overflow-hidden relative bg-gradient-to-br from-emerald-900/40 via-[#111118] to-gray-900 border border-gray-800/60"
        >
          {/* Decorative grid lines */}
          <div className="absolute inset-0 opacity-10"
            style={{
              backgroundImage:
                "linear-gradient(rgba(16, 185, 129, 0.3) 1px, transparent 1px), linear-gradient(90deg, rgba(16, 185, 129, 0.3) 1px, transparent 1px)",
              backgroundSize: "40px 40px",
            }}
          />
          {/* Center pin */}
          <div className="absolute inset-0 flex items-center justify-center">
            <div className="flex flex-col items-center gap-1">
              <div className="w-10 h-10 rounded-full bg-emerald-500/20 border-2 border-emerald-500/40 flex items-center justify-center animate-pulse">
                <MapPin size={18} className="text-emerald-400" />
              </div>
              <span className="text-xs text-emerald-500/60 font-medium">
                {visiblePlaces.length} places found
              </span>
            </div>
          </div>

          {/* Map labels */}
          {visiblePlaces.slice(0, 5).map((place) => (
            <div
              key={place.id}
              className="absolute w-2 h-2 rounded-full bg-emerald-400 shadow-lg shadow-emerald-500/40 animate-pulse"
              style={{
                left: `${((place.lng - 101.6) / 0.2) * 50 + 25}%`,
                top: `${((3.2 - place.lat) / 0.3) * 50 + 15}%`,
              }}
            />
          ))}
        </div>
      </div>

      {/* ── Results List ───────────────────────────────────────────────── */}
      <div className="px-4">
        <div className="flex items-center justify-between mb-3">
          <h2 className="text-xs font-semibold text-gray-500 uppercase tracking-wider">
            {visiblePlaces.length} {visiblePlaces.length === 1 ? "place" : "places"}
          </h2>
          {usageLoading && (
            <Loader2 size={12} className="animate-spin text-gray-600" />
          )}
        </div>

        {pageLoading ? (
          <div className="flex items-center justify-center py-12">
            <Loader2 size={24} className="animate-spin text-emerald-500/50" />
          </div>
        ) : visiblePlaces.length === 0 ? (
          <div className="bg-[#111118] border border-gray-800/60 rounded-2xl p-8 text-center">
            <MapPin size={32} className="mx-auto text-gray-700 mb-2" />
            <p className="text-sm text-gray-500">No places found</p>
            <p className="text-xs text-gray-700 mt-1">
              {isFree
                ? "Free tier shows mosques only. Try a different search."
                : "Try adjusting your search or filters."}
            </p>
          </div>
        ) : (
          <div className="space-y-3">
            {visiblePlaces.map((place) => {
              const bookmarked = isBookmarked(place.id);
              return (
                <div
                  key={place.id}
                  onClick={() => setSelectedPlace(place)}
                  className="bg-[#111118] border border-gray-800/60 rounded-2xl p-4 active:scale-[0.99] transition cursor-pointer"
                >
                  <div className="flex items-start justify-between gap-3">
                    <div className="flex-1 min-w-0">
                      {/* Place name + type badge */}
                      <div className="flex items-center gap-2 mb-1">
                        <h3 className="text-sm font-semibold text-white truncate">
                          {place.name}
                        </h3>
                        <span
                          className={`text-xs font-medium px-2 py-0.5 rounded-full shrink-0 ${
                            place.type === "mosque"
                              ? "bg-emerald-500/15 text-emerald-300 border border-emerald-500/30"
                              : "bg-amber-500/15 text-amber-300 border border-amber-500/30"
                          }`}
                        >
                          {place.type === "mosque" ? "Mosque" : "Restaurant"}
                        </span>
                      </div>

                      {/* Address */}
                      <p className="text-xs text-gray-500 mb-1.5 truncate">
                        {place.address}
                      </p>

                      {/* Rating */}
                      <div className="mb-1.5">{renderStars(place.rating)}</div>

                      {/* Halal badge */}
                      {place.halal_certified && (
                        <span className="inline-flex items-center gap-1 text-xs font-medium text-emerald-400 bg-emerald-500/10 px-2 py-0.5 rounded-full">
                          <span className="w-1.5 h-1.5 rounded-full bg-emerald-400" />
                          Halal Certified
                        </span>
                      )}
                    </div>

                    {/* Bookmark heart */}
                    <button
                      onClick={(e) => {
                        e.stopPropagation();
                        toggleBookmark(place);
                      }}
                      className={`shrink-0 w-8 h-8 rounded-full flex items-center justify-center transition ${
                        bookmarked
                          ? "bg-emerald-500/20 text-emerald-400"
                          : "bg-gray-800/60 text-gray-600 hover:text-gray-400"
                      }`}
                    >
                      <Heart
                        size={14}
                        className={bookmarked ? "fill-emerald-400" : ""}
                      />
                    </button>
                  </div>
                </div>
              );
            })}
          </div>
        )}
      </div>

      {/* ── Detail Modal ────────────────────────────────────────────────── */}
      {selectedPlace && (
        <div
          className="fixed inset-0 z-50 bg-black/70 flex items-end sm:items-center justify-center"
          onClick={() => setSelectedPlace(null)}
        >
          <div
            onClick={(e) => e.stopPropagation()}
            className="bg-[#111118] border border-gray-800/60 rounded-t-3xl sm:rounded-3xl w-full max-w-md max-h-[85vh] overflow-y-auto animate-fade-in"
          >
            {/* Handle */}
            <div className="pt-3 pb-1 flex justify-center sm:hidden">
              <div className="w-10 h-1 rounded-full bg-gray-700" />
            </div>

            <div className="p-5">
              {/* Close button */}
              <div className="flex justify-end mb-2">
                <button
                  onClick={() => setSelectedPlace(null)}
                  className="w-8 h-8 rounded-full bg-gray-800/80 flex items-center justify-center"
                >
                  <X size={14} className="text-gray-400" />
                </button>
              </div>

              {/* Type badge */}
              <div className="mb-3">
                <span
                  className={`text-xs font-medium px-3 py-1 rounded-full ${
                    selectedPlace.type === "mosque"
                      ? "bg-emerald-500/15 text-emerald-300 border border-emerald-500/30"
                      : "bg-amber-500/15 text-amber-300 border border-amber-500/30"
                  }`}
                >
                  {selectedPlace.type === "mosque" ? "🕌 Mosque" : "🍽️ Restaurant"}
                </span>
              </div>

              {/* Name */}
              <h2 className="text-lg font-bold text-white mb-1">
                {selectedPlace.name}
              </h2>

              {/* Halal certified */}
              {selectedPlace.halal_certified && (
                <div className="flex items-center gap-1.5 mb-3">
                  <span className="w-2 h-2 rounded-full bg-emerald-400" />
                  <span className="text-xs font-medium text-emerald-400">
                    Halal Certified
                  </span>
                </div>
              )}

              {/* Address */}
              <div className="flex items-start gap-2 mb-3">
                <MapPin size={14} className="text-gray-500 mt-0.5 shrink-0" />
                <p className="text-sm text-gray-400">{selectedPlace.address}</p>
              </div>

              {/* Rating */}
              <div className="flex items-center gap-2 mb-4">
                <Star size={14} className="fill-amber-400 text-amber-400" />
                <span className="text-sm font-semibold text-white">
                  {selectedPlace.rating.toFixed(1)}
                </span>
                <span className="text-xs text-gray-600">/ 5.0</span>
              </div>

              {/* Coords */}
              <div className="grid grid-cols-2 gap-3 mb-5">
                <div className="bg-[#0a0a0f] rounded-xl p-3 text-center">
                  <p className="text-xs text-gray-600">Latitude</p>
                  <p className="text-xs text-gray-300 font-mono">
                    {selectedPlace.lat.toFixed(4)}
                  </p>
                </div>
                <div className="bg-[#0a0a0f] rounded-xl p-3 text-center">
                  <p className="text-xs text-gray-600">Longitude</p>
                  <p className="text-xs text-gray-300 font-mono">
                    {selectedPlace.lng.toFixed(4)}
                  </p>
                </div>
              </div>

              {/* Bookmark button */}
              <button
                onClick={() => {
                  toggleBookmark(selectedPlace);
                  setSelectedPlace(null);
                }}
                className={`w-full py-3 rounded-2xl text-sm font-semibold transition flex items-center justify-center gap-2 ${
                  isBookmarked(selectedPlace.id)
                    ? "bg-gray-800 text-gray-400 border border-gray-700"
                    : "bg-emerald-500/20 text-emerald-300 border border-emerald-500/40"
                }`}
              >
                <Heart
                  size={16}
                  className={
                    isBookmarked(selectedPlace.id) ? "fill-emerald-400" : ""
                  }
                />
                {isBookmarked(selectedPlace.id)
                  ? "Remove Bookmark"
                  : "Add to Bookmarks"}
              </button>
            </div>
          </div>
        </div>
      )}
    </div>
  );
}