import { useState, useRef, useEffect } from 'react';
import { api } from '../lib/api';
import { getCurrentLocation } from '../lib/geolocation';

interface Props {
  isOpen: boolean;
  onClose: () => void;
}

export default function QuickAddWidget({ isOpen, onClose }: Props) {
  const [type, setType] = useState('event');
  const [content, setContent] = useState('');
  const [loading, setLoading] = useState(false);
  const [locked, setLocked] = useState(false);
  const inputRef = useRef<HTMLInputElement>(null);

  const today = new Date().toISOString().split('T')[0];

  useEffect(() => {
    if (isOpen) {
      checkDiaryStatus();
      setTimeout(() => inputRef.current?.focus(), 50);
    }
  }, [isOpen]);

  useEffect(() => {
    const handleKeyDown = (e: KeyboardEvent) => {
      if (e.key === 'Enter' && (e.ctrlKey || e.metaKey)) {
        e.preventDefault();
        if (content.trim() && !locked && !loading) {
          const form = inputRef.current?.form;
          if (form) {
            const submitEvent = new Event('submit', { bubbles: true, cancelable: true });
            form.dispatchEvent(submitEvent);
          }
        }
      }
    };

    if (isOpen) {
      window.addEventListener('keydown', handleKeyDown);
    }
    return () => window.removeEventListener('keydown', handleKeyDown);
  }, [isOpen, content, locked, loading]);

  const checkDiaryStatus = async () => {
    const res = await api.getDay(today);
    if (res.data) {
      setLocked(!!res.data.journal);
    }
  };

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    if (!content.trim() || locked) return;

    setLoading(true);
    const location = await getCurrentLocation();
    await api.createEvent(today, type, content, undefined, location ?? undefined);
    setContent('');
    setLoading(false);
    onClose();
  };

  if (!isOpen) return null;

  if (locked) {
    return (
      <div className="fixed inset-0 z-50 flex items-start justify-center pt-20">
        <div className="absolute inset-0 bg-black/50 backdrop-blur-sm" onClick={onClose} />
        <div className="relative bg-slate-800 rounded-2xl shadow-2xl w-full max-w-md mx-4 p-6 text-center">
          <p className="text-slate-300 mb-2">Today's diary is locked</p>
          <p className="text-slate-500 text-sm mb-4">Delete the diary to add more events.</p>
          <a
            href={`/journal/${today}`}
            className="inline-block px-4 py-2 bg-purple-600 hover:bg-purple-700 rounded-lg text-sm font-medium transition"
          >
            View Diary
          </a>
        </div>
      </div>
    );
  }

  return (
    <div className="fixed inset-0 z-50 flex items-start justify-center pt-20">
      <div className="absolute inset-0 bg-black/50 backdrop-blur-sm" onClick={onClose} />
      <div className="relative bg-slate-800 rounded-2xl shadow-2xl w-full max-w-md mx-4">
        <form onSubmit={handleSubmit} className="p-4">
          <div className="flex gap-2 mb-3">
            <button
              type="button"
              onClick={() => setType('event')}
              className={`px-3 py-1 rounded text-sm ${type === 'event' ? 'bg-purple-600' : 'bg-slate-700'}`}
            >
              Event
            </button>
            <button
              type="button"
              onClick={() => setType('health')}
              className={`px-3 py-1 rounded text-sm ${type === 'health' ? 'bg-purple-600' : 'bg-slate-700'}`}
            >
              Health
            </button>
            <button
              type="button"
              onClick={() => setType('photo')}
              className={`px-3 py-1 rounded text-sm ${type === 'photo' ? 'bg-purple-600' : 'bg-slate-700'}`}
            >
              Photo
            </button>
            <button
              type="button"
              onClick={() => setType('voice')}
              className={`px-3 py-1 rounded text-sm ${type === 'voice' ? 'bg-purple-600' : 'bg-slate-700'}`}
            >
              Voice
            </button>
          </div>
          <div className="flex gap-2">
            <input
              ref={inputRef}
              type="text"
              value={content}
              onChange={(e) => setContent(e.target.value)}
              placeholder={type === 'health' ? 'How are you feeling?' : 'Log an event...'}
              className="flex-1 px-4 py-3 bg-slate-900 rounded-lg border border-slate-700 focus:border-purple-500 focus:outline-none"
            />
            <button
              type="submit"
              disabled={loading || !content.trim()}
              className="px-6 py-3 bg-purple-600 hover:bg-purple-700 rounded-lg font-medium transition disabled:opacity-50"
            >
              +
            </button>
          </div>
        </form>
      </div>
    </div>
  );
}