import React, { useState, useEffect, useRef } from 'react';
import { useTranslation } from 'react-i18next';
import { AutocompleteRequest, isLoggedIn } from '../../utils/api';
import { useTutorial } from '../../components/Tutorial/useTutorial';
import { TUTORIAL_KEYS } from '../../components/Tutorial/tutorialSteps';
import TutorialOverlay from '../../components/Tutorial/TutorialOverlay';
import BusinessNameInputModal from '../../components/BusinessNameInputModal';
import LoginPromptModal from '../../components/LoginPromptModal';
import SearchInputForm from '../../components/SearchInputForm';
import { SearchType } from '../../components/SearchInputForm';

// Orb configuration with movement zones to prevent overlap
interface OrbConfig {
  id: string;
  size: number;
  initialX: number;
  initialY: number;
  color: string;
  minX: number;
  maxX: number;
  minY: number;
  maxY: number;
}

const orbConfigs: OrbConfig[] = [
  { id: 'orb-1', size: 500, initialX: -10, initialY: -10, color: 'radial-gradient(circle, #C490FF 20%, #AE72F9 50%, rgba(94, 235, 195, 0.4) 100%)', minX: -30, maxX: 35, minY: -30, maxY: 40 },
  { id: 'orb-2', size: 480, initialX: 70, initialY: -5, color: 'radial-gradient(circle, #5EEBC3 25%, rgba(174, 114, 249, 0.6) 70%, rgba(139, 92, 246, 0.3) 100%)', minX: 50, maxX: 110, minY: -30, maxY: 40 },
  { id: 'orb-3', size: 420, initialX: 5, initialY: 35, color: 'radial-gradient(circle, rgba(148, 251, 224, 0.8) 15%, #AE72F9 55%, rgba(94, 235, 195, 0.3) 100%)', minX: -20, maxX: 45, minY: 20, maxY: 65 },
  { id: 'orb-4', size: 400, initialX: 60, initialY: 40, color: 'radial-gradient(circle, rgba(220, 200, 255, 0.95) 10%, rgba(148, 251, 224, 0.85) 45%, rgba(174, 114, 249, 0.5) 100%)', minX: 40, maxX: 100, minY: 25, maxY: 70 },
  { id: 'orb-5', size: 520, initialX: -8, initialY: 65, color: 'radial-gradient(circle, #B794F6 30%, rgba(148, 251, 224, 0.6) 65%, rgba(174, 114, 249, 0.3) 100%)', minX: -30, maxX: 40, minY: 50, maxY: 110 },
  { id: 'orb-6', size: 450, initialX: 65, initialY: 70, color: 'radial-gradient(circle, rgba(180, 255, 235, 0.95) 15%, rgba(200, 160, 255, 0.8) 50%, rgba(94, 235, 195, 0.45) 100%)', minX: 45, maxX: 110, minY: 55, maxY: 110 },
];

interface HeroSectionProps {
  onAnalyze?: (value: string, type?: SearchType) => void;
  onAutocomplete?: (data: AutocompleteRequest) => void;
  onManualInput?: (businessName: string, address: string, category: string) => void;
  onNext?: () => void;
  error?: string | null;
  scrollProgress?: number;
}

const HeroSection: React.FC<HeroSectionProps> = ({ onAnalyze, onAutocomplete, onManualInput, onNext, error: externalError, scrollProgress = 0 }) => {
  const { t } = useTranslation();
  const [isManualModalOpen, setIsManualModalOpen] = useState(false);
  const [isLoginPromptOpen, setIsLoginPromptOpen] = useState(false);
  const orbRefs = useRef<(HTMLDivElement | null)[]>([]);
  const animationRefs = useRef<number[]>([]);
  const tutorial = useTutorial();

  // 첫 방문 시 랜딩 튜토리얼 시작
  useEffect(() => {
    if (!tutorial.hasSeen(TUTORIAL_KEYS.LANDING)) {
      const timer = setTimeout(() => {
        tutorial.startTutorial(TUTORIAL_KEYS.LANDING);
      }, 800);
      return () => clearTimeout(timer);
    }
  }, []);

  // Orb 랜덤 이동 애니메이션
  useEffect(() => {
    const moveOrb = (orb: HTMLDivElement, index: number) => {
      const config = orbConfigs[index];
      let currentX = config.initialX;
      let currentY = config.initialY;
      let targetX = currentX;
      let targetY = currentY;
      let scale = 1;
      let targetScale = 1;
      let isFirstMove = true;

      const generateNewTarget = () => {
        const rangeX = config.maxX - config.minX;
        const rangeY = config.maxY - config.minY;
        if (isFirstMove) {
          const smallRangeX = rangeX * 0.3;
          const smallRangeY = rangeY * 0.3;
          targetX = currentX + (Math.random() - 0.5) * smallRangeX;
          targetY = currentY + (Math.random() - 0.5) * smallRangeY;
          targetX = Math.max(config.minX, Math.min(config.maxX, targetX));
          targetY = Math.max(config.minY, Math.min(config.maxY, targetY));
          isFirstMove = false;
        } else {
          targetX = config.minX + Math.random() * rangeX;
          targetY = config.minY + Math.random() * rangeY;
        }
        targetScale = 0.9 + Math.random() * 0.2;
      };

      const animate = () => {
        const speed = 0.003;
        currentX += (targetX - currentX) * speed;
        currentY += (targetY - currentY) * speed;
        scale += (targetScale - scale) * speed;
        orb.style.left = `${currentX}%`;
        orb.style.top = `${currentY}%`;
        orb.style.transform = `scale(${scale})`;
        const distance = Math.sqrt(Math.pow(targetX - currentX, 2) + Math.pow(targetY - currentY, 2));
        if (distance < 1) generateNewTarget();
        animationRefs.current[index] = requestAnimationFrame(animate);
      };

      generateNewTarget();
      animate();
    };

    orbRefs.current.forEach((orb, index) => {
      if (orb) moveOrb(orb, index);
    });

    return () => {
      animationRefs.current.forEach(id => cancelAnimationFrame(id));
    };
  }, []);

  return (
    <div className="hero-section">
      {/* Animated background orbs */}
      <div
        className="hero-bg-orbs"
        style={{ opacity: Math.max(0, 1 - scrollProgress * 3) }}
      >
        {orbConfigs.map((config, index) => (
          <div
            key={config.id}
            ref={el => { orbRefs.current[index] = el; }}
            className="hero-orb-random"
            style={{
              width: `${config.size}px`,
              height: `${config.size}px`,
              background: config.color,
              left: `${config.initialX}%`,
              top: `${config.initialY}%`,
            }}
          />
        ))}
      </div>

      <div className="hero-content">
        <img
          src="/assets/images/ADO2_with Slogan_white.svg"
          alt="ADO2"
          className="hero-logo"
        />

        <SearchInputForm
          onAnalyze={onAnalyze}
          onAutocomplete={onAutocomplete}
          onManualInput={onManualInput}
          onManualButtonClick={() => {
            if (isLoggedIn()) {
              setIsManualModalOpen(true);
            } else {
              setIsLoginPromptOpen(true);
            }
          }}
          error={externalError || null}
        />
      </div>

      {/* Footer Indicator */}
      <button onClick={onNext} className="scroll-indicator">
        <span className="scroll-indicator-text">{t('landing.hero.scrollMore')}</span>
        <div className="scroll-indicator-icon">
          <svg width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="1" strokeLinecap="round" strokeLinejoin="round">
            <path d="M7 10l5 5 5-5" />
          </svg>
        </div>
      </button>

      {tutorial.isActive && !isManualModalOpen && (
        <TutorialOverlay
          hints={tutorial.hints}
          currentIndex={tutorial.currentHintIndex}
          onNext={tutorial.nextHint}
          onPrev={tutorial.prevHint}
          onSkip={tutorial.skipTutorial}
          groupProgress={tutorial.groupProgress}
        />
      )}

      {isManualModalOpen && (
        <BusinessNameInputModal
          onClose={() => setIsManualModalOpen(false)}
          onSubmit={(businessName, address, category) => {
            if (tutorial.isActive) tutorial.nextHint();
            setIsManualModalOpen(false);
            onManualInput?.(businessName, address, category);
          }}
        />
      )}

      {isLoginPromptOpen && (
        <LoginPromptModal onClose={() => setIsLoginPromptOpen(false)} />
      )}
    </div>
  );
};

export default HeroSection;