"use client";

import { TrendingUp, BookOpen, Flame, RefreshCw } from "lucide-react";
import Link from "next/link";
import { useDashboard } from "@/lib/hooks/useDashboard";
import { BillCard } from "@/components/shared/BillCard";
import { WelcomeBanner } from "@/components/shared/WelcomeBanner";
import { adminAPI } from "@/lib/api";
import { useState } from "react";
import { useAuthStore } from "@/stores/authStore";

export default function DashboardPage() {
  const { data, isLoading, refetch } = useDashboard();
  const [polling, setPolling] = useState(false);
  const token = useAuthStore((s) => s.token);

  const triggerPoll = async () => {
    setPolling(true);
    try {
      await adminAPI.triggerPoll();
      setTimeout(() => { refetch(); setPolling(false); }, 3000);
    } catch { setPolling(false); }
  };

  return (
    <div className="space-y-8">
      <div className="flex items-center justify-between">
        <div>
          <h1 className="text-2xl font-bold">Dashboard</h1>
          <p className="text-muted-foreground text-sm mt-1">
            Your personalized Congressional activity feed
          </p>
        </div>
        <button
          onClick={triggerPoll}
          disabled={polling}
          className="flex items-center gap-2 px-4 py-2 text-sm bg-primary text-primary-foreground rounded-md hover:bg-primary/90 transition-colors disabled:opacity-50"
        >
          <RefreshCw className={`w-4 h-4 ${polling ? "animate-spin" : ""}`} />
          {polling ? "Polling..." : "Poll Now"}
        </button>
      </div>

      <WelcomeBanner />

      {isLoading ? (
        <div className="text-center py-20 text-muted-foreground">Loading dashboard...</div>
      ) : (
        <div className="grid grid-cols-1 md:grid-cols-3 gap-4 md:gap-8">
          <div className="md:col-span-2 space-y-4">
            <h2 className="font-semibold flex items-center gap-2">
              {token ? <BookOpen className="w-4 h-4" /> : <Flame className="w-4 h-4" />}
              {token ? "Your Feed" : "Most Popular"}
              {token && data?.follows && (
                <span className="text-xs text-muted-foreground font-normal">
                  ({data.follows.bills} bills · {data.follows.members} members · {data.follows.topics} topics)
                </span>
              )}
            </h2>
            {!token ? (
              <div className="space-y-3">
                <div className="rounded-lg border border-dashed px-4 py-3 flex items-center justify-between gap-4">
                  <p className="text-sm text-muted-foreground">
                    Sign in to personalise this feed with bills and members you follow.
                  </p>
                  <div className="flex gap-2 shrink-0">
                    <Link href="/register" className="px-3 py-1.5 text-xs font-medium rounded-md bg-primary text-primary-foreground hover:bg-primary/90 transition-colors">
                      Register
                    </Link>
                    <Link href="/login" className="px-3 py-1.5 text-xs font-medium rounded-md border border-border text-foreground hover:bg-accent transition-colors">
                      Sign in
                    </Link>
                  </div>
                </div>
                {data?.trending?.length ? (
                  <div className="space-y-3">
                    {data.trending.map((bill) => (
                      <BillCard key={bill.bill_id} bill={bill} />
                    ))}
                  </div>
                ) : null}
              </div>
            ) : !data?.feed?.length ? (
              <div className="bg-card border border-border rounded-lg p-8 text-center text-muted-foreground">
                <p className="text-sm">Your feed is empty.</p>
                <p className="text-xs mt-1">Follow bills, members, or topics to see activity here.</p>
              </div>
            ) : (
              <div className="space-y-3">
                {data.feed.map((bill) => (
                  <BillCard key={bill.bill_id} bill={bill} />
                ))}
              </div>
            )}
          </div>

          <div className="space-y-4">
            <h2 className="font-semibold flex items-center gap-2">
              <TrendingUp className="w-4 h-4" />
              Trending
            </h2>
            {!data?.trending?.length ? (
              <div className="bg-card border border-border rounded-lg p-6 text-center text-muted-foreground text-xs">
                No trend data yet. Run a poll to populate.
              </div>
            ) : (
              <div className="space-y-2">
                {data.trending.map((bill) => (
                  <BillCard key={bill.bill_id} bill={bill} compact />
                ))}
              </div>
            )}
          </div>
        </div>
      )}
    </div>
  );
}