import React, { useState, useEffect } from 'react';
import { motion } from 'framer-motion';
import { X, Key, Eye, EyeOff, Loader2 } from 'lucide-react';
import { useBodyScrollLock } from '../hooks/useBodyScrollLock';
import type { AIProvider, UserPreferences } from '../types';

interface ApiKeyModalProps {
  isOpen: boolean;
  onClose: () => void;
  preferences: UserPreferences;
  onSave: (prefs: Partial<UserPreferences>) => Promise<void>;
  saving: boolean;
  hasAIAccess: boolean;
}

export const ApiKeyModal: React.FC<ApiKeyModalProps> = ({
  isOpen,
  onClose,
  preferences,
  onSave,
  saving,
  hasAIAccess,
}) => {
  useBodyScrollLock(isOpen);
  const [localProvider, setLocalProvider] = useState<AIProvider>(preferences.aiProvider || 'gemini');
  const [localGeminiKey, setLocalGeminiKey] = useState(preferences.geminiApiKey || '');
  const [localOpenRouterKey, setLocalOpenRouterKey] = useState(preferences.openRouterApiKey || '');
  const [localOpenRouterModel, setLocalOpenRouterModel] = useState(preferences.openRouterModel || '');
  const [showGeminiKey, setShowGeminiKey] = useState(false);
  const [showOpenRouterKey, setShowOpenRouterKey] = useState(false);

  useEffect(() => {
    if (isOpen) {
      setLocalProvider(preferences.aiProvider || 'gemini');
      setLocalGeminiKey(preferences.geminiApiKey || '');
      setLocalOpenRouterKey(preferences.openRouterApiKey || '');
      setLocalOpenRouterModel(preferences.openRouterModel || '');
    }
  }, [isOpen, preferences]);

  if (!isOpen) return null;

  const handleSave = async () => {
    await onSave({
      aiProvider: localProvider,
      geminiApiKey: localGeminiKey || undefined,
      openRouterApiKey: localOpenRouterKey || undefined,
      openRouterModel: localOpenRouterModel || undefined,
    });
    onClose();
  };

  return (
    <motion.div
      initial={{ opacity: 0 }}
      animate={{ opacity: 1 }}
      exit={{ opacity: 0 }}
      className="fixed inset-0 bg-black/50 flex items-center justify-center z-50 p-4"
      onClick={onClose}
    >
      <motion.div
        initial={{ scale: 0.9, opacity: 0 }}
        animate={{ scale: 1, opacity: 1 }}
        exit={{ scale: 0.9, opacity: 0 }}
        className="bg-white rounded-2xl max-w-md w-full shadow-xl overflow-hidden"
        onClick={(e) => e.stopPropagation()}
      >
        <div className="p-6 border-b border-gray-100 flex items-center justify-between bg-gradient-to-r from-gray-800 to-gray-900">
          <div className="flex items-center gap-3 text-white">
            <div className="p-2 bg-white/20 rounded-xl">
              <Key size={24} />
            </div>
            <div>
              <h2 className="text-xl font-black">AI Settings</h2>
              <p className="text-sm opacity-80">Configure your AI provider</p>
            </div>
          </div>
          <button
            onClick={onClose}
            className="p-2 hover:bg-white/20 rounded-xl transition text-white"
          >
            <X size={24} />
          </button>
        </div>

        <div className="p-6 bg-gray-50 space-y-4">
          {hasAIAccess ? (
            <>
              <div>
                <label className="block font-bold text-gray-800 mb-2">AI Provider</label>
                <div className="flex bg-gray-200 p-1 rounded-xl">
                  <button
                    type="button"
                    onClick={() => setLocalProvider('gemini')}
                    className={`flex-1 py-2 px-3 rounded-lg font-bold text-sm transition-all ${
                      localProvider === 'gemini'
                        ? 'bg-white shadow-sm text-gray-800'
                        : 'text-gray-500 hover:text-gray-700'
                    }`}
                  >
                    Gemini
                  </button>
                  <button
                    type="button"
                    onClick={() => setLocalProvider('openrouter')}
                    className={`flex-1 py-2 px-3 rounded-lg font-bold text-sm transition-all ${
                      localProvider === 'openrouter'
                        ? 'bg-white shadow-sm text-gray-800'
                        : 'text-gray-500 hover:text-gray-700'
                    }`}
                  >
                    OpenRouter
                  </button>
                </div>
              </div>

              {localProvider === 'gemini' ? (
                <div>
                  <label className="block font-bold text-gray-800 mb-2">
                    Gemini API Key
                  </label>
                  <p className="text-sm text-gray-500 mb-2">
                    Leave empty to use the system key.
                  </p>
                  <div className="relative">
                    <input
                      type={showGeminiKey ? 'text' : 'password'}
                      value={localGeminiKey}
                      onChange={(e) => setLocalGeminiKey(e.target.value)}
                      placeholder="AIza..."
                      className="w-full px-4 py-3 pr-12 rounded-xl border-2 border-gray-200 focus:border-theme-primary focus:outline-none text-gray-800"
                    />
                    <button
                      type="button"
                      onClick={() => setShowGeminiKey(!showGeminiKey)}
                      className="absolute right-3 top-1/2 -translate-y-1/2 text-gray-400 hover:text-gray-600"
                    >
                      {showGeminiKey ? <EyeOff size={20} /> : <Eye size={20} />}
                    </button>
                  </div>
                </div>
              ) : (
                <>
                  <div>
                    <label className="block font-bold text-gray-800 mb-2">
                      OpenRouter API Key
                    </label>
                    <p className="text-sm text-gray-500 mb-2">
                      Get your key from{' '}
                      <a
                        href="https://openrouter.ai/keys"
                        target="_blank"
                        rel="noopener noreferrer"
                        className="text-theme-primary hover:underline"
                      >
                        openrouter.ai/keys
                      </a>
                    </p>
                    <div className="relative">
                      <input
                        type={showOpenRouterKey ? 'text' : 'password'}
                        value={localOpenRouterKey}
                        onChange={(e) => setLocalOpenRouterKey(e.target.value)}
                        placeholder="sk-or-..."
                        className="w-full px-4 py-3 pr-12 rounded-xl border-2 border-gray-200 focus:border-theme-primary focus:outline-none text-gray-800"
                      />
                      <button
                        type="button"
                        onClick={() => setShowOpenRouterKey(!showOpenRouterKey)}
                        className="absolute right-3 top-1/2 -translate-y-1/2 text-gray-400 hover:text-gray-600"
                      >
                        {showOpenRouterKey ? <EyeOff size={20} /> : <Eye size={20} />}
                      </button>
                    </div>
                  </div>
                  <div>
                    <label className="block font-bold text-gray-800 mb-2">
                      Model
                    </label>
                    <p className="text-sm text-gray-500 mb-2">
                      Default: google/gemini-3-flash-preview
                    </p>
                    <input
                      type="text"
                      value={localOpenRouterModel}
                      onChange={(e) => setLocalOpenRouterModel(e.target.value)}
                      placeholder="google/gemini-3-flash-preview"
                      className="w-full px-4 py-3 rounded-xl border-2 border-gray-200 focus:border-theme-primary focus:outline-none text-gray-800"
                    />
                  </div>
                </>
              )}
            </>
          ) : (
            <div className="text-center py-4">
              <Key size={32} className="mx-auto mb-3 text-gray-400" />
              <p className="text-gray-500 font-bold">API access not available</p>
              <p className="text-sm text-gray-400 mt-1">Contact an administrator for access</p>
            </div>
          )}
        </div>

        <div className="p-6 border-t border-gray-100 flex gap-3">
          <button
            onClick={onClose}
            className="flex-1 py-3 rounded-xl font-bold border-2 border-gray-200 text-gray-600 hover:bg-gray-50 transition"
          >
            Cancel
          </button>
          {hasAIAccess && (
            <button
              onClick={handleSave}
              disabled={saving}
              className="flex-1 py-3 rounded-xl font-bold bg-gray-800 text-white hover:bg-gray-700 transition disabled:opacity-50 flex items-center justify-center gap-2"
            >
              {saving ? (
                <>
                  <Loader2 size={20} className="animate-spin" />
                  Saving...
                </>
              ) : (
                'Save'
              )}
            </button>
          )}
        </div>
      </motion.div>
    </motion.div>
  );
};