'use client';

import { useEffect, useState } from 'react';
import { useParams, useRouter } from 'next/navigation';
import { api, ApiError } from '@/lib/api';
import { Card, CardContent } from '@/components/ui/card';
import { Button } from '@/components/ui/button';

interface ShareData { message: string; waUrl: string; deepLink: string }

export default function SharePage() {
  const { id } = useParams<{ id: string }>();
  const router = useRouter();
  const [data, setData] = useState<ShareData | null>(null);
  const [loading, setLoading] = useState(true);
  const [copied, setCopied] = useState(false);
  const [error, setError] = useState('');

  useEffect(() => {
    api.get<ShareData>(`/api/vihars/${id}/whatsapp-message`)
      .then(setData)
      .catch((e) => setError(e instanceof ApiError ? e.message : 'Failed to load message'))
      .finally(() => setLoading(false));
  }, [id]);

  async function handleCopy() {
    if (!data) return;
    await navigator.clipboard.writeText(data.message);
    setCopied(true);
    setTimeout(() => setCopied(false), 2000);
  }

  async function handleShare() {
    if (!data || !navigator.share) return;
    await navigator.share({ text: data.message }).catch(() => {});
  }

  if (loading) return <div className="py-20 text-center text-sm text-ink-300">Loading…</div>;
  if (error) return <div className="py-20 text-center text-sm text-rust">{error}</div>;
  if (!data) return null;

  return (
    <div className="space-y-5 pb-8">
      <div>
        <h1 className="font-display text-2xl font-semibold text-ink">Share Vihar</h1>
        <div className="mt-1 h-0.5 w-12 bg-saffron rounded-full" />
      </div>

      {/* Message preview */}
      <Card>
        <CardContent className="pt-4">
          <p className="mb-2 text-xs font-medium uppercase tracking-wide text-ink-300">Message preview</p>
          <pre className="whitespace-pre-wrap font-mono text-sm text-ink leading-relaxed max-h-72 overflow-y-auto">{data.message}</pre>
        </CardContent>
      </Card>

      <p className="text-xs text-center text-ink-300">
        WhatsApp will open. Pick the group or contact to share with.
      </p>

      {/* Primary action */}
      <a
        href={data.waUrl}
        rel="noopener"
        className="flex w-full items-center justify-center gap-2 rounded-md bg-[#25D366] py-4 text-base font-semibold text-white transition-opacity active:opacity-80"
      >
        <svg viewBox="0 0 24 24" fill="currentColor" className="h-5 w-5">
          <path d="M17.472 14.382c-.297-.149-1.758-.867-2.03-.967-.273-.099-.471-.148-.67.15-.197.297-.767.966-.94 1.164-.173.199-.347.223-.644.075-.297-.15-1.255-.463-2.39-1.475-.883-.788-1.48-1.761-1.653-2.059-.173-.297-.018-.458.13-.606.134-.133.298-.347.446-.52.149-.174.198-.298.298-.497.099-.198.05-.371-.025-.52-.075-.149-.669-1.612-.916-2.207-.242-.579-.487-.5-.669-.51-.173-.008-.371-.01-.57-.01-.198 0-.52.074-.792.372-.272.297-1.04 1.016-1.04 2.479 0 1.462 1.065 2.875 1.213 3.074.149.198 2.096 3.2 5.077 4.487.709.306 1.262.489 1.694.625.712.227 1.36.195 1.871.118.571-.085 1.758-.719 2.006-1.413.248-.694.248-1.289.173-1.413-.074-.124-.272-.198-.57-.347m-5.421 7.403h-.004a9.87 9.87 0 01-5.031-1.378l-.361-.214-3.741.982.998-3.648-.235-.374a9.86 9.86 0 01-1.51-5.26c.001-5.45 4.436-9.884 9.888-9.884 2.64 0 5.122 1.03 6.988 2.898a9.825 9.825 0 012.893 6.994c-.003 5.45-4.437 9.884-9.885 9.884m8.413-18.297A11.815 11.815 0 0012.05 0C5.495 0 .16 5.335.157 11.892c0 2.096.547 4.142 1.588 5.945L.057 24l6.305-1.654a11.882 11.882 0 005.683 1.448h.005c6.554 0 11.89-5.335 11.893-11.893a11.821 11.821 0 00-3.48-8.413Z"/>
        </svg>
        Share on WhatsApp
      </a>

      {/* Secondary actions */}
      <div className="flex gap-3">
        <Button variant="outline" className="flex-1" onClick={handleCopy}>
          {copied ? '✓ Copied!' : 'Copy message'}
        </Button>
        {typeof navigator !== 'undefined' && navigator.share && (
          <Button variant="outline" className="flex-1" onClick={handleShare}>
            Share via…
          </Button>
        )}
      </div>

      <Button variant="ghost" className="w-full" onClick={() => router.push(`/captain/vihars/${id}`)}>
        Done →
      </Button>
    </div>
  );
}
