"use client";

import { useEffect, useState } from "react";
import { motion } from "framer-motion";
import { SiteHeader } from "../../components/site-header";
import { SiteFooter } from "../../components/site-footer";

const balances = [18420, 19280, 20540, 19980, 21450, 22890, 22120];
const maxBalance = Math.max(...balances);

const expenses = [
  { label: "Rent & mortgage", value: 2800 },
  { label: "Payroll", value: 9200 },
  { label: "Software & tools", value: 1450 },
  { label: "Vendors", value: 2280 },
];

const aiMessages = [
  "You’re on track to finish the month with a $6,920 surplus if spending stays at the current pace.",
  "Dining is trending 14% above your usual pattern. Consider capping at $620 to stay on target.",
  "You can safely move $1,500 into savings without dropping below your $10k buffer.",
];

export default function DemoPage() {
  const [aiIndex, setAiIndex] = useState(0);
  const [aiVisible, setAiVisible] = useState(false);

  useEffect(() => {
    let timeout: NodeJS.Timeout;
    let interval: NodeJS.Timeout;

    const startLoop = () => {
      setAiVisible(false);
      timeout = setTimeout(() => {
        setAiVisible(true);
      }, 1000);
    };

    startLoop();
    interval = setInterval(() => {
      setAiIndex((prev) => (prev + 1) % aiMessages.length);
      startLoop();
    }, 5000);

    return () => {
      clearTimeout(timeout);
      clearInterval(interval);
    };
  }, []);

  return (
    <div className="min-h-screen bg-gradient-to-br from-slate-950 via-slate-900 to-slate-950 text-foreground flex flex-col">
      <SiteHeader />

      <main className="flex-1 pt-20 pb-12">
        <div className="mx-auto max-w-6xl px-6 lg:px-8 space-y-8">
          <header className="space-y-3">
            <p className="text-xs font-semibold tracking-[0.25em] text-emerald-400 uppercase">
              Demo · LedgerOne
            </p>
            <h1 className="text-3xl sm:text-4xl font-semibold tracking-tight text-slate-50">
              AI-powered cash control dashboard
            </h1>
            <p className="text-sm sm:text-base text-slate-400 max-w-2xl">
              This is a looping, demo-only view designed for screen recordings. All data is fake but
              behaves like a live, AI-assisted finance cockpit.
            </p>
          </header>

          <div className="grid gap-6 lg:grid-cols-3">
            {/* Left: animated cashflow graph */}
            <section className="lg:col-span-2 rounded-3xl border border-slate-800 bg-slate-900/60 px-5 pt-4 pb-6 shadow-[0_30px_120px_rgba(15,23,42,0.9)] backdrop-blur-xl">
              <div className="flex items-center justify-between gap-3 mb-3">
                <div className="space-y-1">
                  <p className="text-xs font-medium text-slate-400">Projected balance · next 30 days</p>
                  <p className="text-sm font-semibold text-slate-50">
                    $22,890 <span className="text-emerald-400 text-xs font-normal">▲ +$3,410</span>
                  </p>
                </div>
                <div className="flex items-center gap-2 text-[11px] text-slate-400">
                  <div className="flex items-center gap-1">
                    <span className="h-1.5 w-4 rounded-full bg-emerald-400" />
                    <span>Balance</span>
                  </div>
                  <div className="flex items-center gap-1">
                    <span className="h-1.5 w-4 rounded-full bg-sky-400" />
                    <span>Income</span>
                  </div>
                  <div className="flex items-center gap-1">
                    <span className="h-1.5 w-4 rounded-full bg-rose-400" />
                    <span>Outflows</span>
                  </div>
                </div>
              </div>

              {/* Animated bar/line combo chart */}
              <div className="relative h-60 rounded-2xl bg-gradient-to-b from-slate-900/60 to-slate-950/90 overflow-hidden">
                <svg viewBox="0 0 100 40" className="absolute inset-0 opacity-40">
                  <defs>
                    <linearGradient id="balanceLine" x1="0%" y1="0%" x2="100%" y2="0%">
                      <stop offset="0%" stopColor="#22c55e" />
                      <stop offset="50%" stopColor="#38bdf8" />
                      <stop offset="100%" stopColor="#a855f7" />
                    </linearGradient>
                  </defs>
                  <motion.path
                    d="
                      M 0 30
                      C 15 28, 25 26, 35 24
                      S 55 20, 65 18
                      S 85 16, 100 14
                    "
                    fill="none"
                    stroke="url(#balanceLine)"
                    strokeWidth="1.5"
                    strokeLinecap="round"
                    initial={{ pathLength: 0 }}
                    animate={{ pathLength: 1 }}
                    transition={{ duration: 4, repeat: Infinity, ease: "easeInOut" }}
                  />
                </svg>

                <div className="absolute inset-x-6 bottom-4 flex items-end justify-between gap-4">
                  {balances.map((v, i) => {
                    const height = (v / maxBalance) * 100;
                    return (
                      <motion.div
                        key={i}
                        className="flex-1 flex flex-col items-center gap-1"
                        initial={{ opacity: 0, y: 10 }}
                        animate={{ opacity: 1, y: 0 }}
                        transition={{ delay: 0.1 + i * 0.08 }}
                      >
                        <motion.div
                          className="w-full rounded-t-full bg-gradient-to-t from-slate-800 via-sky-500 to-emerald-400 shadow-[0_0_25px_rgba(56,189,248,0.5)]"
                          style={{ height: `${height}%` }}
                          animate={{ scaleY: [0.7, 1, 0.85, 1] }}
                          transition={{ duration: 4, repeat: Infinity, ease: "easeInOut", delay: i * 0.05 }}
                        />
                        <span className="text-[10px] text-slate-500">D{i + 1}</span>
                      </motion.div>
                    );
                  })}
                </div>

                <div className="absolute left-1/2 bottom-3 -translate-x-1/2 rounded-full bg-amber-500/15 px-3 py-1.5 text-[11px] text-amber-100 ring-1 ring-amber-400/50 flex items-center gap-2">
                  <span className="h-1.5 w-1.5 rounded-full bg-amber-300 animate-pulse" />
                  <span>Balance dip in 6 days · adjust discretionary by ~12%</span>
                </div>
              </div>
            </section>

            {/* Right: budget ring + expense breakdown */}
            <section className="space-y-4">
              <div className="rounded-3xl border border-slate-800 bg-slate-900/70 p-4 shadow-[0_20px_80px_rgba(15,23,42,0.9)] backdrop-blur-xl">
                <div className="mb-3 flex items-center justify-between">
                  <div>
                    <p className="text-xs font-medium text-slate-400">Monthly budget</p>
                    <p className="text-sm font-semibold text-slate-50">
                      $18,400{" "}
                      <span className="ml-1 text-[11px] font-normal text-emerald-400">Safe to spend: $4,120</span>
                    </p>
                  </div>
                  <span className="rounded-full bg-emerald-500/15 px-2 py-0.5 text-[10px] font-medium text-emerald-300">
                    Healthy
                  </span>
                </div>

                <div className="flex items-center gap-4">
                  {/* Animated progress ring */}
                  <div className="relative h-20 w-20">
                    <svg viewBox="0 0 36 36" className="h-20 w-20 -rotate-90">
                      <path
                        d="M18 2.0845
                          a 15.9155 15.9155 0 0 1 0 31.831
                          a 15.9155 15.9155 0 0 1 0 -31.831"
                        fill="none"
                        stroke="rgba(30,64,175,0.35)"
                        strokeWidth="3"
                      />
                      <motion.path
                        d="M18 2.0845
                          a 15.9155 15.9155 0 0 1 0 31.831
                          a 15.9155 15.9155 0 0 1 0 -31.831"
                        fill="none"
                        stroke="url(#demoRingGradient)"
                        strokeWidth="3"
                        strokeLinecap="round"
                        animate={{ strokeDasharray: ["55, 100", "78, 100", "65, 100"] }}
                        transition={{ duration: 4.5, repeat: Infinity, ease: "easeInOut" }}
                      />
                      <defs>
                        <linearGradient id="demoRingGradient" x1="0%" y1="0%" x2="100%" y2="0%">
                          <stop offset="0%" stopColor="#22c55e" />
                          <stop offset="50%" stopColor="#38bdf8" />
                          <stop offset="100%" stopColor="#a855f7" />
                        </linearGradient>
                      </defs>
                    </svg>
                    <div className="absolute inset-0 flex flex-col items-center justify-center gap-0.5">
                      <motion.span
                        className="text-sm font-semibold text-slate-50"
                        animate={{ opacity: [0.7, 1, 0.7] }}
                        transition={{ duration: 2.4, repeat: Infinity }}
                      >
                        74%
                      </motion.span>
                      <span className="text-[10px] text-slate-400">used</span>
                    </div>
                  </div>

                  <div className="flex-1 space-y-2">
                    {expenses.map((e) => {
                      const pct = e.value / 18400;
                      return (
                        <div key={e.label} className="space-y-0.5">
                          <div className="flex items-center justify-between text-[11px] text-slate-300">
                            <span>{e.label}</span>
                            <span className="text-slate-400">
                              ${e.value.toLocaleString()}{" "}
                              <span className="text-slate-500">
                                · {(pct * 100).toFixed(0)}%
                              </span>
                            </span>
                          </div>
                          <div className="h-1.5 rounded-full bg-slate-800 overflow-hidden">
                            <motion.div
                              className="h-full rounded-full bg-gradient-to-r from-emerald-400 via-sky-400 to-violet-500"
                              initial={{ width: 0 }}
                              animate={{ width: `${Math.min(pct * 100, 100)}%` }}
                              transition={{ duration: 2, repeat: Infinity, repeatType: "reverse", ease: "easeInOut" }}
                            />
                          </div>
                        </div>
                      );
                    })}
                  </div>
                </div>
              </div>

              {/* AI chat card */}
              <div className="rounded-3xl border border-slate-800 bg-slate-900/70 p-4 shadow-[0_20px_80px_rgba(15,23,42,0.9)] backdrop-blur-xl space-y-3">
                <div className="flex items-center justify-between">
                  <div className="flex items-center gap-2">
                    <div className="flex h-7 w-7 items-center justify-center rounded-full bg-emerald-500/15 text-[11px] text-emerald-300 shadow-[0_0_22px_rgba(34,197,94,0.7)]">
                      AI
                    </div>
                    <div className="text-xs text-slate-300">
                      <p className="font-medium">LedgerOne Copilot</p>
                      <p className="text-[11px] text-slate-500">Monitors cash flow in real-time</p>
                    </div>
                  </div>
                  <span className="rounded-full bg-slate-800 px-2 py-0.5 text-[10px] text-slate-300">
                    Demo mode
                  </span>
                </div>

                <div className="space-y-2 text-[11px]">
                  <div className="w-fit max-w-[90%] rounded-2xl bg-slate-800/90 px-3 py-2 text-slate-100">
                    How much can we safely move into savings this month?
                  </div>
                  <motion.div
                    key={aiIndex}
                    initial={{ opacity: 0, y: 6 }}
                    animate={{ opacity: aiVisible ? 1 : 0, y: aiVisible ? 0 : 4 }}
                    transition={{ duration: 0.4, ease: "easeOut" }}
                    className="ml-auto w-fit max-w-[90%] rounded-2xl bg-emerald-500/10 px-3 py-2 text-emerald-50 ring-1 ring-emerald-400/30"
                  >
                    {aiMessages[aiIndex]}
                  </motion.div>
                </div>
              </div>
            </section>
          </div>
        </div>
      </main>

      <SiteFooter />
    </div>
  );
}