"use client";

import { useEffect, useState } from "react";
import { Button } from "@/components/ui/button";
import { Flame, Sparkles } from "lucide-react";
import { useActiveUser } from "@/hooks/useActiveUser";
import { useTheme } from "next-themes";

export function StreakOnboardingModal() {
  const { user, loading } = useActiveUser();
  const { theme } = useTheme();
  const [isOpen, setIsOpen] = useState(false);

  useEffect(() => {
    if (loading || !user) return;

    // Check sessionStorage
    const hasSeen = sessionStorage.getItem(`hasSeenStreakPopup_${user.id}`);
    if (!hasSeen) {
      setIsOpen(true);
    }
  }, [user, loading]);

  if (!isOpen || !user) return null;

  const streak = user.streak_count;
  const targetExam = user.target_exam?.replace("_", " ") || "JEE/NEET";

  // Streak-based wishes and titles
  let wishTitle = "Welcome to PragatiVeer! 🌟";
  let wishMessage = `Prepare yourself to conquer ${targetExam}. Your daily practice starts here!`;

  if (streak === 0) {
    wishTitle = "Start Your Streak Today! 🚀";
    wishMessage = "Today is Day 1 of your journey. Establish your streak now and build the consistency needed for IIT/AIIMS!";
  } else if (streak < 4) {
    wishTitle = "Keep the Fire Burning! 🔥";
    wishMessage = `Great job! You have maintained a ${streak}-day study streak. Keep practicing daily to build solid muscle memory!`;
  } else {
    wishTitle = "Unstoppable Dedication! ⚡";
    wishMessage = `Incredible! A ${streak}-day streak shows true championship discipline. You are outperforming the competition. Let's make today count!`;
  }

  const handleEnter = () => {
    sessionStorage.setItem(`hasSeenStreakPopup_${user.id}`, "true");
    setIsOpen(false);
  };

  // Calculate trial days left
  let trialDaysLeft = 0;
  if (user.trial_end) {
    const end = new Date(user.trial_end);
    const now = new Date();
    const diffTime = end.getTime() - now.getTime();
    trialDaysLeft = Math.ceil(diffTime / (1000 * 60 * 60 * 24));
  }

  return (
    <div className="fixed inset-0 z-50 flex items-center justify-center bg-background/85 backdrop-blur-md animate-in fade-in duration-300">
      
      {/* Centered Modal Card Container covering 80% screen size (w-[80vw] h-[80vh]) */}
      <div className="bg-background border border-border/80 shadow-[0_0_60px_-10px_rgba(0,240,255,0.25)] rounded-3xl w-[80vw] max-w-5xl h-[80vh] max-h-[800px] relative overflow-hidden animate-in zoom-in-95 slide-in-from-bottom-4 duration-300 z-20 pointer-events-auto mx-4 flex flex-col justify-start">
        
        {/* Subtle background glow */}
        <div className="absolute -right-20 -top-20 size-48 bg-[#00F0FF]/5 rounded-full blur-3xl pointer-events-none" />
        <div className="absolute -left-20 -bottom-20 size-48 bg-primary/5 rounded-full blur-3xl pointer-events-none" />

        {/* Top Celebration Animation Panel (Iframe with height 60%, matching bg) */}
        <div className="relative w-full h-[60%] z-10 pointer-events-none overflow-hidden bg-background">
          <iframe
            src={`/streak-animation.html?streak=${streak}&theme=${theme === 'light' ? 'light' : 'dark'}`}
            className="w-full h-full border-none"
            title="Streak Celebration"
            allowtransparency="true"
          />
        </div>

        {/* Bottom Greetings & Action Panel (height 40%, matching bg) */}
        <div className="p-8 text-center flex-1 flex flex-col justify-between bg-background z-20">
          
          <div className="space-y-4">
            {/* Badge Indicators */}
            <div className="flex flex-col items-center gap-3">
              {streak > 0 ? (
                <div className="inline-flex items-center gap-2 px-4 py-1.5 bg-orange-500/10 border border-orange-500/30 text-orange-500 text-sm md:text-base font-extrabold rounded-full tracking-wider uppercase">
                  <Flame size={16} className="fill-current animate-bounce" /> {streak} Day Streak Active
                </div>
              ) : (
                <div className="inline-flex items-center gap-2 px-4 py-1.5 bg-blue-500/10 border border-blue-500/30 text-blue-400 text-sm md:text-base font-extrabold rounded-full tracking-wider uppercase">
                  <Sparkles size={16} className="animate-spin" style={{ animationDuration: '4s' }} /> Day 1 Awaits
                </div>
              )}

              {trialDaysLeft > 0 && (
                <div className="inline-flex items-center gap-2 px-4 py-1.5 bg-emerald-500/10 border border-emerald-500/30 text-emerald-400 text-sm md:text-base font-semibold rounded-full tracking-wider">
                  🎁 Free Trial: {trialDaysLeft} {trialDaysLeft === 1 ? "day" : "days"} remaining
                </div>
              )}
            </div>
            
            {/* Greetings Text */}
            <div className="space-y-3">
              <h3 className="text-2xl md:text-3xl font-black tracking-tight bg-gradient-to-r dark:from-white dark:via-white dark:to-gray-400 from-black via-black to-gray-600 bg-clip-text text-transparent">
                {wishTitle}
              </h3>
              <p className="text-muted-foreground text-sm md:text-base leading-relaxed max-w-lg mx-auto">
                {wishMessage}
              </p>
            </div>
          </div>

          {/* Action Button */}
          <div className="pt-2 max-w-sm w-full mx-auto">
            <Button 
              onClick={handleEnter}
              className="w-full h-12 rounded-xl text-base font-black bg-[#00F0FF] text-black hover:bg-[#00F0FF]/90 shadow-[0_0_15px_-3px_#00F0FF] hover:shadow-[0_0_25px_#00F0FF] hover:-translate-y-0.5 transition-all duration-300"
            >
              Enter Workspace
            </Button>
          </div>
        </div>
      </div>
    </div>
  );
}