import React, { useState } from 'react';
import { UserSettings } from '../types';
import { X, Volume2, Check, Info, Mic2, Settings2, Key, Sparkles, Cpu } from 'lucide-react';
import Tooltip from './Tooltip';
import AudioDeviceSelector from './AudioDeviceSelector';
import { Button } from './ui/button';
import { Card } from './ui/card';
import { Badge } from './ui/badge';
import { ScrollArea } from './ui/scroll-area';
import { Input } from './ui/input';
import { Label } from './ui/label';
import { Tabs, TabsContent, TabsList, TabsTrigger } from './ui/tabs';

interface SettingsModalProps {
  settings: UserSettings;
  onUpdate: (settings: UserSettings) => void;
  onClose: () => void;
}

interface VoiceOption {
  id: UserSettings['voiceName'];
  label: string;
  gender: 'Male' | 'Female' | 'Neutral';
  style: string;
  description: string;
}

const VOICE_OPTIONS: VoiceOption[] = [
  { id: 'Zephyr', label: 'Zephyr', gender: 'Neutral', style: 'Helpful', description: 'A balanced, clear, and professional tone suitable for most scenarios.' },
  { id: 'Puck', label: 'Puck', gender: 'Male', style: 'Youthful', description: 'Energetic and friendly, ideal for peer-to-peer or informal interactions.' },
  { id: 'Kore', label: 'Kore', gender: 'Female', style: 'Calm', description: 'Soothing and professional, perfect for clinical or high-stress roleplay.' },
  { id: 'Charon', label: 'Charon', gender: 'Male', style: 'Authoritative', description: 'Deep and commanding, useful for workplace or boundary-testing scenarios.' },
  { id: 'Fenrir', label: 'Fenrir', gender: 'Male', style: 'Rugged', description: 'Direct and matter-of-fact tone with a slightly more serious edge.' },
];

const AVAILABLE_MODELS = [
  { id: 'google/gemini-3.8-flash', name: 'Google Gemini 3.8 Flash', badge: 'Default • Frontier Ultra Low Latency' },
  { id: 'google/gemini-3.7-flash', name: 'Google Gemini 3.7 Flash', badge: 'Fast • Hybrid Reasoning' },
  { id: 'google/gemini-2.5-flash', name: 'Google Gemini 2.5 Flash', badge: 'Stable • Low Latency' },
  { id: 'anthropic/claude-3.5-haiku', name: 'Anthropic Claude 3.5 Haiku', badge: 'Nuanced Reasoning' },
  { id: 'meta-llama/llama-3.3-70b-instruct', name: 'Meta Llama 3.3 70B Instruct', badge: 'Open Weights' },
];

const SettingsModal: React.FC<SettingsModalProps> = ({ settings, onUpdate, onClose }) => {
  const [activeTab, setActiveTab] = useState('voice');
  const [openRouterKey, setOpenRouterKey] = useState(settings.openRouterApiKey || '');
  const [selectedModel, setSelectedModel] = useState(settings.roleplayModel || 'google/gemini-3.8-flash');

  const handleSave = () => {
    onUpdate({
      ...settings,
      openRouterApiKey: openRouterKey.trim() || undefined,
      roleplayModel: selectedModel,
      supervisorModel: selectedModel,
    });
    onClose();
  };

  return (
    <div className="fixed inset-0 z-[100] flex items-center justify-center p-4 bg-slate-900/60 backdrop-blur-md">
      <div className="bg-white rounded-3xl shadow-2xl w-full max-w-xl overflow-hidden animate-in fade-in zoom-in duration-300 border border-slate-100 max-h-[90vh] flex flex-col">
        <div className="p-6 bg-slate-50 border-b border-slate-200 flex justify-between items-center flex-shrink-0">
          <div className="flex items-center gap-3">
            <div className="bg-slate-800 p-2 rounded-xl text-white">
              <Settings2 size={20} />
            </div>
            <div>
              <h2 className="text-lg font-bold text-slate-800">Application Settings</h2>
              <p className="text-[10px] text-slate-400 font-bold uppercase tracking-widest">Powered by OpenRouter Engine</p>
            </div>
          </div>
          <Button variant="ghost" size="icon" onClick={onClose} className="text-slate-400 hover:bg-slate-200 rounded-xl">
            <X size={20} />
          </Button>
        </div>

        <Tabs value={activeTab} onValueChange={setActiveTab} className="w-full flex-grow flex flex-col overflow-hidden">
          <div className="px-6 pt-4 border-b border-slate-100">
            <TabsList className="grid grid-cols-2 w-full max-w-xs">
              <TabsTrigger value="voice" className="text-xs">
                <Volume2 size={14} className="mr-1.5" />
                Voice & Audio
              </TabsTrigger>
              <TabsTrigger value="openrouter" className="text-xs">
                <Key size={14} className="mr-1.5" />
                OpenRouter AI
              </TabsTrigger>
            </TabsList>
          </div>

          <ScrollArea className="p-6 flex-grow overflow-y-auto">
            <TabsContent value="voice" className="space-y-6 m-0">
              <section className="space-y-3">
                <div className="flex items-center justify-between">
                  <h3 className="text-xs font-black text-slate-400 uppercase tracking-widest flex items-center gap-2">
                    <Mic2 size={14} className="text-teal-600" />
                    Vocal Profile
                  </h3>
                  <Tooltip content="Different voices can help simulate specific social or professional contexts.">
                    <Info size={14} className="text-slate-300" />
                  </Tooltip>
                </div>

                <div className="grid grid-cols-1 gap-2.5">
                  {VOICE_OPTIONS.map((voice) => (
                    <Card
                      key={voice.id}
                      onClick={() => onUpdate({ ...settings, voiceName: voice.id, genderPreference: voice.gender, vocalStyle: voice.style })}
                      className={`flex flex-row items-center justify-between p-3.5 cursor-pointer transition-all ${settings.voiceName === voice.id
                          ? 'bg-teal-50 border-teal-500 shadow-sm shadow-teal-100'
                          : 'bg-white border-slate-200 hover:border-teal-200'
                        }`}
                    >
                      <div className="flex items-center gap-3">
                        <div className={`w-9 h-9 rounded-full flex items-center shrink-0 justify-center ${settings.voiceName === voice.id ? 'bg-teal-600 text-white' : 'bg-slate-100 text-slate-400'
                          }`}>
                          <Volume2 size={16} />
                        </div>
                        <div>
                          <div className="flex items-center gap-2 mb-0.5">
                            <span className="font-bold text-slate-800 text-sm">{voice.label}</span>
                            <Badge variant="secondary" className="text-[9px] font-black uppercase text-slate-500 rounded">
                              {voice.gender} • {voice.style}
                            </Badge>
                          </div>
                          <p className="text-xs text-slate-500 font-light">{voice.description}</p>
                        </div>
                      </div>
                      {settings.voiceName === voice.id && (
                        <div className="bg-teal-600 text-white p-1 rounded-full shrink-0 ml-2">
                          <Check size={12} />
                        </div>
                      )}
                    </Card>
                  ))}
                </div>
              </section>

              <section className="space-y-3 pt-2">
                <div className="flex items-center justify-between">
                  <h3 className="text-xs font-black text-slate-400 uppercase tracking-widest flex items-center gap-2">
                    <Settings2 size={14} className="text-teal-600" />
                    Input Microphone
                  </h3>
                </div>

                <AudioDeviceSelector
                  selectedDeviceId={settings.preferredAudioDeviceId}
                  onSelect={(deviceId) => onUpdate({ ...settings, preferredAudioDeviceId: deviceId })}
                />
              </section>
            </TabsContent>

            <TabsContent value="openrouter" className="space-y-6 m-0">
              <div className="space-y-4">
                <div>
                  <h3 className="text-xs font-black text-slate-400 uppercase tracking-widest flex items-center gap-2 mb-1">
                    <Key size={14} className="text-teal-600" />
                    OpenRouter API Key
                  </h3>
                  <p className="text-xs text-slate-500">
                    Enter your OpenRouter API Key (<code className="font-mono text-xs">sk-or-v1-...</code>). All clinical roleplay, live insights, and scenario architect functions route through OpenRouter.
                  </p>
                </div>

                <div className="space-y-2">
                  <Label htmlFor="openrouter-key" className="text-xs font-semibold text-slate-700">
                    API Key
                  </Label>
                  <Input
                    id="openrouter-key"
                    type="password"
                    placeholder="sk-or-v1-..."
                    value={openRouterKey}
                    onChange={(e) => setOpenRouterKey(e.target.value)}
                    className="font-mono text-xs"
                  />
                </div>

                <div className="space-y-3 pt-2">
                  <div className="flex items-center justify-between">
                    <Label className="text-xs font-semibold text-slate-700 flex items-center gap-1.5">
                      <Cpu size={14} className="text-teal-600" />
                      Roleplay & Supervisor Model
                    </Label>
                  </div>

                  <div className="grid grid-cols-1 gap-2">
                    {AVAILABLE_MODELS.map((model) => (
                      <Card
                        key={model.id}
                        onClick={() => setSelectedModel(model.id)}
                        className={`p-3 cursor-pointer transition-all flex items-center justify-between border ${selectedModel === model.id
                            ? 'bg-teal-50 border-teal-500 shadow-sm'
                            : 'bg-white border-slate-200 hover:border-slate-300'
                          }`}
                      >
                        <div>
                          <p className="text-xs font-bold text-slate-800">{model.name}</p>
                          <p className="text-[10px] text-slate-400 font-mono mt-0.5">{model.id}</p>
                        </div>
                        <Badge variant="outline" className="text-[9px] font-semibold text-teal-700 border-teal-200">
                          {model.badge}
                        </Badge>
                      </Card>
                    ))}
                  </div>
                </div>
              </div>

              <div className="bg-teal-50 border border-teal-100 rounded-2xl p-4 flex gap-3">
                <div className="text-teal-600 mt-0.5">
                  <Sparkles size={18} />
                </div>
                <p className="text-xs text-teal-900 leading-relaxed">
                  Your OpenRouter API Key is stored securely in your browser LocalStorage and is never shared or transmitted elsewhere.
                </p>
              </div>
            </TabsContent>
          </ScrollArea>
        </Tabs>

        <div className="p-5 bg-slate-50 border-t border-slate-200 flex justify-end flex-shrink-0">
          <Button
            onClick={handleSave}
            className="bg-slate-800 text-white px-8 h-11 rounded-2xl font-bold hover:bg-slate-900 shadow-lg shadow-slate-200 transition-all uppercase tracking-widest text-[10px]"
          >
            Save Preferences
          </Button>
        </div>
      </div>
    </div>
  );
};

export default SettingsModal;