"use client";

import { useState } from 'react';

type Analysis = {
  platform: 'tiktok' | 'instagram' | 'unknown';
  analysis: {
    ingredients: Array<{ name: string; quantity: string | null; unit: string | null; notes?: string | null }>;
    prep_steps: string[];
    cooking_steps: string[];
  };
  description?: string;
  transcript?: string;
  thumbnailBase64?: string;
  title?: string;
};

export default function RecipeAnalyzerPage() {
  const [url, setUrl] = useState('');
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);
  const [result, setResult] = useState<Analysis | null>(null);
  const [saving, setSaving] = useState(false);
  const canSave = !!result && !!url;

  async function onSubmit(e: React.FormEvent) {
    e.preventDefault();
    setLoading(true);
    setError(null);
    setResult(null);
    try {
      const res = await fetch('/api/analyze', {
        method: 'POST',
        headers: { 'content-type': 'application/json' },
        body: JSON.stringify({ url }),
      });
      const data = await res.json();
      if (!res.ok) throw new Error(data?.error || 'Failed');
      setResult(data);
    } catch (err: any) {
      setError(err?.message || 'Something went wrong');
    } finally {
      setLoading(false);
    }
  }

  async function onSave() {
    if (!result) return;
    setSaving(true);
    try {
      const res = await fetch('/api/recipes', {
        method: 'POST',
        headers: { 'content-type': 'application/json' },
        body: JSON.stringify({
          url,
          platform: result.platform,
          title: result.title || '',
          description: result.description || '',
          transcript: result.transcript || '',
          analysis: result.analysis,
          thumbnailBase64: result.thumbnailBase64,
        }),
      });
      const data = await res.json();
      if (!res.ok) throw new Error(data?.error || 'Failed to save');
      alert('Saved!');
    } catch (err: any) {
      alert(err?.message || 'Failed to save');
    } finally {
      setSaving(false);
    }
  }

  return (
    <main className="min-h-screen p-6 md:p-12 lg:p-16 flex flex-col gap-8 max-w-3xl mx-auto">
      <h1 className="text-3xl md:text-4xl font-bold">Recipe AI from Reels/TikToks</h1>
      <p className="text-neutral-600 dark:text-neutral-300">
        Paste a TikTok or Instagram share link. The AI analyzes only the video to extract an ingredient list, prep steps, and cooking steps.
      </p>

      <form onSubmit={onSubmit} className="flex flex-col gap-3">
        <input
          type="url"
          required
          placeholder="https://www.tiktok.com/@user/video/123... or https://www.instagram.com/reel/..."
          value={url}
          onChange={(e) => setUrl(e.target.value)}
          className="w-full rounded border border-neutral-300 dark:border-neutral-700 bg-transparent px-3 py-2"
        />
        <button
          type="submit"
          disabled={loading}
          className="inline-flex items-center justify-center rounded bg-black text-white dark:bg-white dark:text-black px-4 py-2 disabled:opacity-60"
        >
          {loading ? 'Analyzing…' : 'Analyze Video'}
        </button>
        {result && (
          <button
            type="button"
            onClick={onSave}
            disabled={saving}
            className="inline-flex items-center justify-center rounded border border-neutral-300 dark:border-neutral-700 px-4 py-2 disabled:opacity-60"
          >
            {saving ? 'Saving…' : 'Save Recipe'}
          </button>
        )}
      </form>

      {error && (
        <div className="rounded border border-red-300 bg-red-50 text-red-800 dark:bg-red-950 dark:text-red-200 p-3">
          {error}
        </div>
      )}

      {result && (
        <div className="space-y-6">
          <div>
            <label className="block text-sm font-medium">Title</label>
            <input
              type="text"
              value={result.title || ''}
              onChange={(e) => setResult({ ...result, title: e.target.value })}
              className="w-full rounded border border-neutral-300 dark:border-neutral-700 bg-transparent px-3 py-2"
              placeholder="Recipe title"
            />
          </div>
          {result.thumbnailBase64 && (
            <img src={result.thumbnailBase64} alt="thumbnail" className="w-full h-auto rounded" />
          )}
          <div className="text-sm text-neutral-600 dark:text-neutral-300 break-words">
            <div>
              <span className="font-medium">Source:</span>{' '}
              <a href={url} className="underline" target="_blank" rel="noreferrer">
                {url}
              </a>
            </div>
            {result.description && (
              <div className="mt-1 whitespace-pre-wrap">
                <span className="font-medium">Description:</span> {result.description}
              </div>
            )}
          </div>
          <div>
            <h2 className="text-xl font-semibold">Ingredients</h2>
            <ul className="list-disc pl-6 mt-2 space-y-1">
              {result.analysis.ingredients.map((it, idx) => (
                <li key={idx}>
                  <span className="font-medium">{it.name}</span>
                  {it.quantity ? ` – ${it.quantity}` : ''}
                  {it.unit ? ` ${it.unit}` : ''}
                  {it.notes ? ` (${it.notes})` : ''}
                </li>
              ))}
            </ul>
          </div>

          <div>
            <h2 className="text-xl font-semibold">Prep Steps</h2>
            <ol className="list-decimal pl-6 mt-2 space-y-1">
              {result.analysis.prep_steps.map((s, i) => (
                <li key={i}>{s}</li>
              ))}
            </ol>
          </div>

          <div>
            <h2 className="text-xl font-semibold">Cooking Steps</h2>
            <ol className="list-decimal pl-6 mt-2 space-y-1">
              {result.analysis.cooking_steps.map((s, i) => (
                <li key={i}>{s}</li>
              ))}
            </ol>
          </div>
        </div>
      )}
    </main>
  );
}