"use client";

import { useState } from "react";
import { useRouter } from "next/navigation";
import { motion } from "framer-motion";
import {
  CheckCircle2,
  Zap,
  Brain,
  BarChart3,
  BookOpen,
  MessageSquareText,
  Trophy,
  ArrowRight,
  Sparkles,
  Clock,
} from "lucide-react";
import { Logo } from "@/components/Logo";

const PRO_FEATURES = [
  { icon: BookOpen, text: "Unlimited Daily Practice Sheets" },
  { icon: BarChart3, text: "Weekly Test Series & Mock Tests" },
  { icon: Trophy, text: "Detailed Performance Analytics" },
  { icon: Zap, text: "Parent Dashboard Access" },
];

const AI_COACH_FEATURES = [
  { icon: BookOpen, text: "Everything in Pro" },
  { icon: Brain, text: "AI Spaced Repetition (Mistake Engine)" },
  { icon: MessageSquareText, text: "24/7 Streaming AI Tutor Chat" },
  { icon: Trophy, text: "Predictive Rank & College Predictor" },
];

export default function OnboardingPage() {
  const router = useRouter();
  const [selecting, setSelecting] = useState<"Pro" | "Al_Coach" | null>(null);

  const handleSelect = async (plan: "Pro" | "Al_Coach") => {
    setSelecting(plan);
    // Save chosen plan preference to localStorage so dashboard can read it
    if (typeof window !== "undefined") {
      localStorage.setItem("chosen_plan", plan);
    }
    // Small UX delay so the button animation feels intentional
    await new Promise((r) => setTimeout(r, 600));
    router.push("/dashboard");
  };

  return (
    <div className="min-h-screen bg-background flex flex-col items-center justify-center p-6 relative overflow-hidden selection:bg-primary/20">
      {/* Background glows */}
      <div className="pointer-events-none fixed inset-0 -z-10">
        <div className="absolute top-0 left-1/4 size-[600px] bg-primary/5 blur-[140px] rounded-full" />
        <div className="absolute bottom-0 right-1/4 size-[500px] bg-[#00F0FF]/5 blur-[120px] rounded-full" />
      </div>

      <div className="w-full max-w-5xl space-y-12 animate-in fade-in slide-in-from-bottom-6 duration-700">
        {/* Logo */}
        <div className="flex justify-center">
          <Logo href="/" className="w-56" imageClassName="object-contain" height={64} />
        </div>

        {/* Header */}
        <motion.div
          initial={{ opacity: 0, y: 24 }}
          animate={{ opacity: 1, y: 0 }}
          transition={{ duration: 0.6 }}
          className="text-center space-y-4"
        >
          <div className="inline-flex items-center gap-2 px-4 py-2 rounded-full bg-primary/10 border border-primary/20 text-primary font-bold text-sm mb-2">
            <Sparkles size={14} className="animate-pulse" />
            Account Created Successfully!
          </div>
          <h1 className="text-4xl md:text-5xl font-black tracking-tighter">
            Choose Your Plan
          </h1>
          <p className="text-muted-foreground text-lg max-w-xl mx-auto font-medium">
            Both plans include a{" "}
            <span className="text-primary font-bold">15-day free trial</span>{" "}
            with full AI Coach access — no card needed.
          </p>

          {/* Trial banner */}
          <div className="inline-flex items-center gap-3 px-6 py-3 rounded-2xl bg-emerald-500/10 border border-emerald-500/20 text-emerald-400 font-semibold text-sm">
            <Clock size={16} />
            Your 15-day free trial with all features starts now — Day 1 of 15
          </div>
        </motion.div>

        {/* Plan Cards */}
        <div className="grid grid-cols-1 md:grid-cols-2 gap-6 max-w-4xl mx-auto">
          {/* Pro Plan */}
          <motion.div
            initial={{ opacity: 0, x: -40 }}
            animate={{ opacity: 1, x: 0 }}
            transition={{ duration: 0.6, delay: 0.15, type: "spring" }}
          >
            <div
              className="relative rounded-[2rem] p-[1px] h-full group cursor-pointer"
              style={{
                background:
                  "linear-gradient(135deg, rgba(234,179,8,0.4) 0%, rgba(234,179,8,0.08) 100%)",
              }}
              onClick={() => !selecting && handleSelect("Pro")}
            >
              <div className="bg-background rounded-[calc(2rem-1px)] p-7 flex flex-col h-full transition-all duration-300 group-hover:bg-secondary/20">
                {/* Header */}
                <div className="mb-6">
                  <div className="inline-flex items-center gap-2 px-3 py-1 rounded-full bg-yellow-500/10 border border-yellow-500/20 text-yellow-500 text-xs font-bold mb-3 uppercase tracking-wider">
                    <Zap size={12} /> Pro Plan
                  </div>
                  <div className="flex items-end gap-2 mb-2">
                    <span className="text-5xl font-black tracking-tight text-yellow-500">₹3,499</span>
                    <span className="text-muted-foreground text-base font-medium mb-2">/year</span>
                  </div>
                  <p className="text-muted-foreground text-sm font-medium">
                    Perfect for self-paced, structured practice.
                  </p>
                </div>

                {/* Features */}
                <ul className="space-y-3 mb-8 flex-1">
                  {PRO_FEATURES.map(({ icon: Icon, text }) => (
                    <li key={text} className="flex items-center gap-3 text-sm font-medium">
                      <CheckCircle2 size={18} className="text-yellow-500 shrink-0" />
                      <span>{text}</span>
                    </li>
                  ))}
                </ul>

                {/* CTA */}
                <button
                  onClick={(e) => {
                    e.stopPropagation();
                    if (!selecting) handleSelect("Pro");
                  }}
                  disabled={!!selecting}
                  className="w-full h-12 rounded-xl bg-yellow-500 text-black font-bold text-base hover:bg-yellow-400 transition-all duration-300 shadow-[0_0_20px_-5px_rgba(234,179,8,0.5)] hover:shadow-[0_0_30px_-3px_rgba(234,179,8,0.7)] hover:-translate-y-0.5 disabled:opacity-70 disabled:cursor-not-allowed flex items-center justify-center gap-2"
                >
                  {selecting === "Pro" ? (
                    <>
                      <span className="size-4 border-2 border-black/30 border-t-black rounded-full animate-spin" />
                      Starting Trial…
                    </>
                  ) : (
                    <>
                      Select Pro & Start Trial
                      <ArrowRight size={16} />
                    </>
                  )}
                </button>
              </div>
            </div>
          </motion.div>

          {/* AI Coach Plan */}
          <motion.div
            initial={{ opacity: 0, x: 40 }}
            animate={{ opacity: 1, x: 0 }}
            transition={{ duration: 0.6, delay: 0.25, type: "spring" }}
          >
            <div
              className="relative rounded-[2rem] p-[1px] h-full group cursor-pointer"
              style={{
                background:
                  "linear-gradient(135deg, rgba(0,240,255,0.5) 0%, rgba(0,240,255,0.08) 100%)",
              }}
              onClick={() => !selecting && handleSelect("Al_Coach")}
            >
              {/* Most Popular Badge */}
              <div className="absolute -top-4 left-1/2 -translate-x-1/2 z-10 inline-flex items-center gap-1.5 px-4 py-1.5 rounded-full bg-[#00F0FF] text-black text-xs font-black uppercase tracking-wider shadow-[0_0_20px_-3px_#00F0FF]">
                <Sparkles size={12} /> Most Popular
              </div>

              <div className="bg-background rounded-[calc(2rem-1px)] p-7 flex flex-col h-full transition-all duration-300 group-hover:bg-secondary/20">
                {/* Header */}
                <div className="mb-6 pt-2">
                  <div className="inline-flex items-center gap-2 px-3 py-1 rounded-full bg-[#00F0FF]/10 border border-[#00F0FF]/20 text-[#00F0FF] text-xs font-bold mb-3 uppercase tracking-wider">
                    <Brain size={12} /> AI Coach Plan
                  </div>
                  <div className="flex items-end gap-2 mb-2">
                    <span className="text-5xl font-black tracking-tight text-[#00F0FF]">₹11,999</span>
                    <span className="text-muted-foreground text-base font-medium mb-2">/year</span>
                  </div>
                  <p className="text-muted-foreground text-sm font-medium">
                    The complete AI-driven preparation system.
                  </p>
                </div>

                {/* Features */}
                <ul className="space-y-3 mb-8 flex-1">
                  {AI_COACH_FEATURES.map(({ icon: Icon, text }) => (
                    <li key={text} className="flex items-center gap-3 text-sm font-medium">
                      <CheckCircle2 size={18} className="text-[#00F0FF] shrink-0" />
                      <span>{text}</span>
                    </li>
                  ))}
                </ul>

                {/* CTA */}
                <button
                  onClick={(e) => {
                    e.stopPropagation();
                    if (!selecting) handleSelect("Al_Coach");
                  }}
                  disabled={!!selecting}
                  className="w-full h-12 rounded-xl bg-[#00F0FF] text-black font-bold text-base hover:bg-[#00F0FF]/90 transition-all duration-300 shadow-[0_0_20px_-5px_rgba(0,240,255,0.5)] hover:shadow-[0_0_30px_-3px_rgba(0,240,255,0.8)] hover:-translate-y-0.5 disabled:opacity-70 disabled:cursor-not-allowed flex items-center justify-center gap-2"
                >
                  {selecting === "Al_Coach" ? (
                    <>
                      <span className="size-4 border-2 border-black/30 border-t-black rounded-full animate-spin" />
                      Starting Trial…
                    </>
                  ) : (
                    <>
                      Select AI Coach & Start Trial
                      <ArrowRight size={16} />
                    </>
                  )}
                </button>
              </div>
            </div>
          </motion.div>
        </div>

        {/* Bottom note */}
        <motion.p
          initial={{ opacity: 0 }}
          animate={{ opacity: 1 }}
          transition={{ duration: 0.6, delay: 0.5 }}
          className="text-center text-xs text-muted-foreground font-medium pb-8"
        >
          🔒 No credit card required for trial &nbsp;·&nbsp; Cancel anytime &nbsp;·&nbsp; All prices inclusive of GST
        </motion.p>
      </div>
    </div>
  );
}