'use client';

import React, { useEffect, useState } from 'react';
import { motion, AnimatePresence } from 'framer-motion';
import Image from 'next/image';

const PRELOAD_VIDEOS = [
  '/assets/videos/web/hero-bohrung.mp4'
];

export function InitialLoader({ shouldShowLoader = true }: { shouldShowLoader?: boolean }) {
  const [isLoading, setIsLoading] = useState(shouldShowLoader);

  useEffect(() => {
    if (!shouldShowLoader) return;
    
    // Fallback Timeout (4 Sekunden), falls Videos hängen
    const timeout = setTimeout(() => {
      finishLoading();
    }, 4000);

    let videosLoaded = 0;
    
    const checkAllLoaded = () => {
      videosLoaded++;
      if (videosLoaded === PRELOAD_VIDEOS.length) {
        clearTimeout(timeout);
        // Kleine Verzögerung für die smootheness
        setTimeout(finishLoading, 800);
      }
    };

    PRELOAD_VIDEOS.forEach((src) => {
      const video = document.createElement('video');
      video.preload = 'auto';
      video.oncanplaythrough = checkAllLoaded;
      video.onerror = checkAllLoaded; // bei Fehler trotzdem weitermachen
      video.src = src;
      video.load();
    });

    // Cleanup
    return () => clearTimeout(timeout);
  }, [shouldShowLoader]);

  const finishLoading = () => {
    // Set a session cookie so the server knows not to render the loader again
    document.cookie = "etib_initial_loader_v5=true; path=/; samesite=lax";
    setIsLoading(false);
  };

  // Wenn wir serverseitig rendern und es nicht zeigen sollen, return null
  if (!shouldShowLoader) return null;

  return (
    <AnimatePresence>
      {isLoading && (
        <motion.div
          key="initial-loader"
          initial={{ y: 0 }}
          exit={{ y: '-100%' }}
          transition={{ duration: 1.2, ease: [0.16, 1, 0.3, 1], delay: 0.2 }}
          className="fixed inset-0 z-[9999] bg-[#050B14] flex flex-col items-center justify-center overflow-hidden"
        >
          {/* Subtle grid background */}
          <div className="absolute inset-0 bg-[linear-gradient(to_right,#8080800a_1px,transparent_1px),linear-gradient(to_bottom,#8080800a_1px,transparent_1px)] bg-[size:32px_32px] [mask-image:radial-gradient(ellipse_60%_50%_at_50%_50%,#000_70%,transparent_100%)]" />

          {/* Deep Glow */}
          <div className="absolute inset-0 bg-[radial-gradient(circle_at_center,_var(--tw-gradient-stops))] from-primary/10 via-transparent to-transparent opacity-80 mix-blend-screen" />
          
          <motion.div 
            initial={{ opacity: 0, scale: 0.9 }}
            animate={{ opacity: 1, scale: 1 }}
            transition={{ duration: 1.2, ease: [0.16, 1, 0.3, 1] }}
            className="relative z-10 flex flex-col items-center w-full px-4"
          >
            {/* Single Masked Logo Container to prevent double-logo offset */}
            <div 
              className="relative w-64 h-20 sm:w-80 sm:h-24 mb-12 filter drop-shadow-[0_0_15px_rgba(255,255,255,0.15)]"
              style={{
                WebkitMaskImage: 'url(/assets/logo-white.png)',
                WebkitMaskSize: 'contain',
                WebkitMaskRepeat: 'no-repeat',
                WebkitMaskPosition: 'center',
                maskImage: 'url(/assets/logo-white.png)',
                maskSize: 'contain',
                maskRepeat: 'no-repeat',
                maskPosition: 'center'
              }}
            >
              {/* Base logo color (slightly dimmed to make the sweep visible) */}
              <div className="absolute inset-0 bg-white/70" />
              
              {/* Sweeping intense white light */}
              <motion.div
                className="absolute inset-0 bg-gradient-to-r from-transparent via-white to-transparent skew-x-[-25deg]"
                initial={{ left: '-150%' }}
                animate={{ left: '250%' }}
                transition={{ duration: 2.5, ease: "easeInOut", repeat: Infinity, repeatDelay: 0.5 }}
              />
            </div>
            
            {/* Elegant Progress Bar */}
            <div className="flex flex-col items-center w-full max-w-xs">
              <div className="flex justify-between w-full mb-3 text-[10px] sm:text-xs font-mono text-white/40 tracking-[0.2em] uppercase">
                <span>System</span>
                <span className="text-primary/80 animate-pulse">Online</span>
              </div>
              <motion.div 
                initial={{ opacity: 0, y: 10 }}
                animate={{ opacity: 1, y: 0 }}
                transition={{ delay: 0.3 }}
                className="h-[2px] w-full bg-white/5 overflow-hidden relative rounded-full"
              >
                <motion.div 
                  className="absolute inset-y-0 left-0 bg-gradient-to-r from-primary-dark via-primary to-primary-light"
                  initial={{ width: "0%" }}
                  animate={{ width: "100%" }}
                  transition={{ duration: 3.8, ease: [0.16, 1, 0.3, 1] }}
                />
              </motion.div>
            </div>
          </motion.div>
        </motion.div>
      )}
    </AnimatePresence>
  );
}