"use client"

import { useState } from "react"
import { Card, CardContent, CardHeader, CardTitle, CardDescription, CardFooter } from "@/components/ui/card"
import { Button } from "@/components/ui/button"
import { Check, X, ShieldCheck, Loader2, Minus, CheckCircle2 } from "lucide-react"

import { useActiveUser } from "@/hooks/useActiveUser"

const WEBHOOK_SECRET = "local_webhook_secret"

export default function UpgradePage() {
  const { userId, loading: userLoading, refreshUser } = useActiveUser()
  const handleUpgrade = (tier: string) => {
    if (userLoading) return
    if (!userId) {
      window.location.href = `/login?redirect=/checkout?tier=${tier}`
      return
    }
    window.location.href = `/checkout?tier=${tier}`
  }

  return (
    <div className="p-8 max-w-7xl mx-auto animate-in fade-in duration-500 min-h-screen">
      <div className="text-center max-w-2xl mx-auto mb-16">
        <h1 className="text-4xl font-extrabold tracking-tight mb-4">Upgrade Your Preparation</h1>
        <p className="text-xl text-muted-foreground">Unlock the full power of PragatiVeer to master JEE & NEET.</p>
      </div>

      <div className="grid grid-cols-1 lg:grid-cols-2 gap-8 max-w-5xl mx-auto items-stretch">
        {/* Free Tier 
        <Card className="bg-background/80 backdrop-blur-md border border-border p-6 rounded-[2rem] flex flex-col justify-between h-full z-10 relative shadow-xl hover:border-border/80 transition-colors">
          <div>
            <h3 className="text-3xl font-bold mb-2 text-foreground">Free</h3>
            <p className="text-muted-foreground mb-6 text-base">Perfect to get started.</p>
            <div className="text-6xl font-bold tracking-tighter mb-6 text-foreground">
              ₹0<span className="text-xl text-white/60 font-medium tracking-normal ml-1">/year</span>
            </div>
            <ul className="space-y-3 mb-6 font-medium text-lg">
              <li className="flex items-center gap-4"><CheckCircle2 className="text-foreground shrink-0" size={24}/> 1 Daily Practice Sheet</li>
              <li className="flex items-center gap-4"><CheckCircle2 className="text-foreground shrink-0" size={24}/> Basic Performance Analytics</li>
              <li className="flex items-center gap-4"><CheckCircle2 className="text-foreground shrink-0" size={24}/> Community Access</li>
            </ul>
          </div>
          <Button variant="outline" className="w-full rounded-2xl h-12 border-border text-foreground font-bold text-lg hover:bg-secondary" disabled>Get Started Free</Button>
        </Card>
        */}

        {/* Pro Tier */}
        <Card className="bg-background/80 backdrop-blur-md border border-border p-6 rounded-[2rem] flex flex-col justify-between h-full z-10 relative shadow-xl hover:border-border/80 transition-colors">
          <div>
            <h3 className="text-3xl font-bold mb-2 text-yellow-500">Pro</h3>
            <p className="text-muted-foreground mb-6 text-base">Perfect for self-paced practice.</p>
            <div className="text-6xl font-bold tracking-tighter mb-6 text-yellow-500">
              ₹3,499<span className="text-xl text-yellow-500/60 font-medium tracking-normal ml-1">/year</span>
            </div>
            <ul className="space-y-3 mb-6 font-medium text-lg">
              <li className="flex items-center gap-4"><CheckCircle2 className="text-yellow-500 shrink-0" size={24}/> Unlimited Daily Practice Sheets</li>
              <li className="flex items-center gap-4"><CheckCircle2 className="text-yellow-500 shrink-0" size={24}/> Weekly Test Series & Mock Tests</li>
              <li className="flex items-center gap-4"><CheckCircle2 className="text-yellow-500 shrink-0" size={24}/> Detailed Performance Analytics</li>
              <li className="flex items-center gap-4"><CheckCircle2 className="text-yellow-500 shrink-0" size={24}/> Parent Dashboard Access</li>
            </ul>
          </div>
          <Button 
            className="w-full bg-yellow-500 text-black hover:bg-yellow-400 font-bold text-lg rounded-2xl h-12" 
            onClick={() => handleUpgrade("Pro")}
            disabled={userLoading}
          >
            {userLoading ? <Loader2 className="animate-spin" /> : "Get Pro"}
          </Button>
        </Card>

        {/* AI Coach Tier */}
        <Card className="bg-background/80 backdrop-blur-md border border-border p-6 rounded-[2rem] flex flex-col justify-between h-full z-10 relative shadow-xl hover:border-border/80 transition-colors">
          <div>
            <h3 className="text-3xl font-bold mb-2 text-[#00F0FF]">AI Coach</h3>
            <p className="text-muted-foreground mb-6 text-base">The complete AI-driven system.</p>
            <div className="text-6xl font-bold tracking-tighter mb-6 text-[#00F0FF]">
              ₹11,999<span className="text-xl text-[#00F0FF]/60 font-medium tracking-normal ml-1">/year</span>
            </div>
            <ul className="space-y-3 mb-6 font-medium text-lg">
              <li className="flex items-center gap-4"><CheckCircle2 className="text-[#00F0FF] shrink-0" size={24}/> Everything in Pro</li>
              <li className="flex items-center gap-4"><CheckCircle2 className="text-[#00F0FF] shrink-0" size={24}/> AI Spaced Repetition (Mistakes)</li>
              <li className="flex items-center gap-4"><CheckCircle2 className="text-[#00F0FF] shrink-0" size={24}/> 24/7 Streaming AI Tutor Chat</li>
              <li className="flex items-center gap-4"><CheckCircle2 className="text-[#00F0FF] shrink-0" size={24}/> Predictive Rank & College Predictor</li>
            </ul>
          </div>
          <Button 
            className="w-full font-bold text-lg rounded-2xl h-12 bg-[#00F0FF] text-black hover:bg-[#00F0FF]/90 transition-all" 
            onClick={() => handleUpgrade("Al_Coach")}
            disabled={userLoading}
          >
            {userLoading ? <Loader2 className="animate-spin" /> : "Get AI Coach"}
          </Button>
        </Card>
      </div>

      <p className="text-center mt-8 text-sm text-muted-foreground font-medium w-full">
        * All above prices are inclusive of GST.
      </p>

      {/* ── Tier Comparison Matrix ── */}
      <section className="mt-20 py-8">
        <div className="text-center mb-12">
          <h2 className="text-3xl md:text-4xl font-extrabold tracking-tight mb-3">Compare All Features</h2>
          <p className="text-muted-foreground text-base md:text-lg max-w-2xl mx-auto">
            Detailed breakdown of capabilities across Free, Pro, and AI Coach tiers.
          </p>
        </div>

        <div className="overflow-x-auto rounded-2xl border border-border/50 bg-secondary/10 backdrop-blur-sm p-3 md:p-6 shadow-2xl">
          <table className="w-full text-left border-collapse min-w-[700px]">
            <thead>
              <tr className="border-b border-border/50 bg-background/50">
                <th className="p-4 md:p-6 font-bold text-lg w-1/2 border-l border-t border-border/50">Feature</th>
                {/* <th className="p-4 md:p-6 font-bold text-lg text-center w-1/5 border-x border-t border-white">Free</th> */}
                <th className="p-4 md:p-6 font-bold text-lg text-center w-1/4 text-yellow-500 border-x border-t border-yellow-500">Pro</th>
                <th className="p-4 md:p-6 font-bold text-lg text-center w-1/4 text-[#00F0FF] bg-[#00F0FF]/5 border-x border-t border-[#00F0FF]">AI Coach</th>
              </tr>
            </thead>
            <tbody className="divide-y divide-border/30 text-sm md:text-base">
              {[
                { name: "Daily Practice Sheets", free: "1/day", pro: "Unlimited", ai: "Unlimited" },
                { name: "Answer Keys", free: true, pro: true, ai: true },
                { name: "Basic Progress Dashboard", free: true, pro: true, ai: true },
                { name: "Streak Tracking", free: true, pro: true, ai: true },
                { name: "Leaderboard (City/School)", free: true, pro: true, ai: true },
                { name: "Topic-wise Micro-tests", free: "5/day", pro: "Unlimited", ai: "Unlimited" },
                { name: "Weekly Test Series", free: false, pro: true, ai: true },
                { name: "Full-Length Mock Tests", free: false, pro: "4/month", ai: "Unlimited" },
                { name: "Previous Year Papers", free: false, pro: true, ai: true },
                { name: "Detailed Performance Analytics", free: false, pro: true, ai: true },
                { name: "Chapter-wise Progress", free: false, pro: true, ai: true },
                { name: "Doubt Resolution (Community)", free: false, pro: true, ai: true },
                { name: "Parent Dashboard", free: false, pro: true, ai: true },
                { name: "Offline Mode (Download DPS)", free: false, pro: true, ai: true },
                { name: "AI Mistake Tracking", free: false, pro: false, ai: true },
                { name: "Spaced Repetition (SM-2)", free: false, pro: false, ai: true },
                { name: "Personalized Daily Study Plan", free: false, pro: false, ai: true },
                { name: "AI Tutor Chat", free: false, pro: false, ai: true },
                { name: "Exam Readiness Score", free: false, pro: false, ai: true },
                { name: "Exam Day Strategy", free: false, pro: false, ai: true },
                { name: "College Predictor", free: false, pro: false, ai: true },
                { name: "Study Time Optimization", free: false, pro: false, ai: true },
              ].map((feature, idx) => (
                <tr key={idx} className="hover:bg-background/40 transition-colors">
                  <td className="p-4 md:p-6 font-medium border-y border-l border-border/30">{feature.name}</td>
                  {/* <td className="p-4 md:p-6 text-center text-muted-foreground border border-white">
                    {typeof feature.free === 'boolean' ? (feature.free ? <CheckCircle2 className="mx-auto text-white" size={20} /> : <Minus className="mx-auto text-white/30" size={20} />) : <span className="font-semibold text-white">{feature.free}</span>}
                  </td> */}
                  <td className="p-4 md:p-6 text-center border border-yellow-500">
                    {typeof feature.pro === 'boolean' ? (feature.pro ? <CheckCircle2 className="mx-auto text-yellow-500" size={20} /> : <Minus className="mx-auto text-yellow-500/30" size={20} />) : <span className="font-semibold text-yellow-500">{feature.pro}</span>}
                  </td>
                  <td className="p-4 md:p-6 text-center bg-[#00F0FF]/5 border border-[#00F0FF]">
                    {typeof feature.ai === 'boolean' ? (feature.ai ? <CheckCircle2 className="mx-auto text-[#00F0FF]" size={20} /> : <Minus className="mx-auto text-[#00F0FF]/30" size={20} />) : <span className="font-semibold text-[#00F0FF]">{feature.ai}</span>}
                  </td>
                </tr>
              ))}
            </tbody>
          </table>
        </div>
      </section>



    </div>
  )
}