import React, { useState, useEffect } from 'react';
import { ArrowLeft, Sparkles } from 'lucide-react';
import { useNavigate } from 'react-router-dom';
import { StoryGenerator } from '../../components/story/StoryGenerator';
import { useSession } from '../../hooks/useSession';
import { TextCaseToggle } from '../../components/ui/text-case-toggle';
import { AdaptiveTitle, AdaptiveParagraph, AdaptiveText } from '../../components/ui/adaptive-text';
import { useUppercasePreference } from '../../hooks/useUppercasePreference';
import { useSpeechRecognition } from '@/features/voice-commands/hooks/useSpeechRecognition';
import { VoiceCommandButton } from '@/features/voice-commands/components/VoiceCommandButton';
import type { StoryChoices } from '@/components/story/StoryGenerator';
import { DEFAULT_LANGUAGE } from '@/types/language';

export function CreateStoryPage() {
  const navigate = useNavigate();
  const { session } = useSession();
  const [error, setError] = React.useState<string | null>(null);
  const {
    transcript: voiceTranscript,
    start: startRecording,
    stop: stopRecording,
    status: recordingStatus,
    error: voiceError,
    isSupported: isVoiceSupported
  } = useSpeechRecognition();

  const { isUpperCase, toggleUppercase, isLoading } = useUppercasePreference(session?.user?.id);

  const [inputMode, setInputMode] = useState<'voice' | 'form'>('form');

  const [storyContext, setStoryContext] = useState('');

  const [isGenerating, setIsGenerating] = useState(false);

  const [step, setStep] = useState(1);

  const [choices, setChoices] = useState<StoryChoices>({
    theme_id: null,
    subject_id: null,
    character_id: null,
    setting_id: null,
    context: '',
    language_type: DEFAULT_LANGUAGE
  });

  // Manipuladores para gravação de voz
  const handleStartRecording = () => {
    setError(null);
    startRecording();
  };

  const handleStopRecording = () => {
    stopRecording();
  };

  // Atualizar status da interface baseado no status da gravação
  useEffect(() => {
    if (recordingStatus === 'recording') {
      setInputMode('voice');
    }
  }, [recordingStatus]);

  useEffect(() => {
    if (inputMode === 'voice' && voiceTranscript) {
      setStep(5);
      setInputMode('voice');
    }
  }, [voiceTranscript, inputMode]);

  if (!session) {
    return (
      <div className="text-center py-12">
        <p className="text-gray-600">Você precisa estar logado para criar histórias.</p>
        <button
          onClick={() => navigate('/login')}
          className="mt-4 text-purple-600 hover:text-purple-700"
        >
          Fazer login
        </button>
      </div>
    );
  }

  return (
    <div>
      <button
        onClick={() => navigate('/aluno/historias')}
        className="flex items-center gap-2 text-gray-600 hover:text-gray-900 mb-6"
      >
        <ArrowLeft className="h-5 w-5" />
        Voltar para histórias
      </button>

      <div className="bg-white rounded-xl shadow-sm border border-gray-200 p-6">
        <div className="flex items-center gap-3 mb-8">
          <div className="p-2 bg-purple-100 rounded-lg">
            <Sparkles className="h-6 w-6 text-purple-600" />
          </div>
          <div>
            <AdaptiveTitle
              text="Criar Nova História"
              isUpperCase={isUpperCase}
              className="text-2xl font-bold text-gray-900"
            />
            <AdaptiveParagraph
              text="Vamos criar uma história personalizada baseada nos seus interesses"
              isUpperCase={isUpperCase}
              className="text-gray-600"
            />
          </div>
          <TextCaseToggle
            isUpperCase={isUpperCase}
            onToggle={toggleUppercase}
            isLoading={isLoading}
            className="ml-auto"
          />
        </div>

        {error && (
          <div className="mb-6 p-4 bg-red-50 text-red-600 rounded-lg">
            <AdaptiveText
              text={error}
              isUpperCase={isUpperCase}
            />
          </div>
        )}

        {voiceError && (
          <div className="mb-6 p-4 bg-red-50 text-red-600 rounded-lg">
            <AdaptiveText
              text={voiceError}
              isUpperCase={isUpperCase}
            />
          </div>
        )}

        <div className="space-y-4">
          {!isVoiceSupported && (
            <div className="p-3 bg-yellow-50 text-yellow-700 rounded-lg mb-4">
              Seu navegador não suporta gravação por voz
            </div>
          )}
        </div>

        <div className="mb-4 flex items-center gap-2">
          <span className="text-sm font-medium">
            Modo atual:
          </span>
          <span className="px-2 py-1 rounded-full text-xs bg-purple-100 text-purple-800">
            {inputMode === 'voice' ? 'Voz' : 'Formulário'}
          </span>
        </div>

        {/*
        <div className="mb-8 space-y-4">
          
          <div className="bg-purple-50 p-4 rounded-xl border border-purple-100">
            <h3 className="text-sm font-medium text-purple-800 mb-3">
              Descreva sua história por voz
            </h3>
            
            <VoiceCommandButton 
              onTranscriptUpdate={(transcript) => {
                setInputMode('voice');
                setStoryContext(transcript);
              }}
              onStart={handleStartRecording}
              onStop={handleStopRecording}
              disabled={isGenerating}
              className="w-full justify-center py-3"
            />
            
            {voiceTranscript && (
              <div className="mt-4 p-3 bg-white rounded-lg border border-gray-200">
                <p className="text-sm text-gray-700">{voiceTranscript}</p>
              </div>
            )}
          </div>
          

          <div className="flex items-center gap-4">
            <div className="flex-1 h-px bg-gray-200" />
            <span className="text-sm text-gray-500">ou</span>
            <div className="flex-1 h-px bg-gray-200" />
          </div>
        </div>
        */}

        <StoryGenerator
          initialContext={inputMode === 'voice' ? voiceTranscript : storyContext}
          onContextChange={(newContext) => {
            if (inputMode === 'form') {
              setStoryContext(newContext);
            }
          }}
          inputMode={inputMode}
          voiceTranscript={voiceTranscript || ''}
          isGenerating={isGenerating}
          setIsGenerating={setIsGenerating}
          step={step}
          setStep={setStep}
          choices={choices}
          setChoices={setChoices}
        />

        <div className="mt-8 p-4 bg-purple-50 rounded-lg">
          <h3 className="text-sm font-medium text-purple-900 mb-2">
            Como funciona?
          </h3>
          <ol className="text-sm text-purple-700 space-y-2">
            {[
              'Conte-nos sobre seus interesses e preferências',
              'Escolha personagens e cenários para sua história',
              'Nossa IA criará uma história única e personalizada',
              'Você poderá ler e praticar com sua nova história'
            ].map((text, index) => (
              <AdaptiveText
                key={index}
                text={`${index + 1}. ${text}`}
                isUpperCase={isUpperCase}
                as="li"
              />
            ))}
          </ol>
        </div>
      </div>
    </div>
  );
}