import { useState } from 'react';
import { 
  Zap, 
  AlertTriangle, 
  Activity, 
  Plus, 
  Sparkles,
  ShieldAlert,
  IndianRupee
} from "lucide-react";
import Button from "@/components/common/button";
import StatCard from "@/components/common/dashStatCard";
import InfoBanner from '@/components/common/infoBanner';
import {Card} from '@/components/common/cardWrapper'; // Assuming Card wrapper location
import { CardHeader } from '@/components/common/cardHeader'; // Assuming CardHeader location

export default function AiPredictivePortal() {
  return (
    <div className="my-15 text-slate-100 font-sans">
      {/* --- HEADER SECTION --- */}
      <div className="flex flex-col md:flex-row md:items-start md:justify-between gap-4 mb-6">
        <div>
          <div className="flex items-center gap-2 text-[10px] font-bold tracking-widest uppercase font-mono">
            <span className="text-teal-400">Apple One — HQ Tower</span>
            <span className="text-slate-500">•</span>
            <span className="text-slate-500">INTELLIGENCE</span>
            <span className="text-slate-500">•</span>
            <span className="text-slate-500">AI</span>
          </div>
          <h1 className="text-2xl font-bold text-white tracking-tight mt-2">
            AI & predictive intelligence
          </h1>
          <p className="text-sm font-medium text-slate-400 mt-2 max-w-xl leading-relaxed">
            Real-time asset metrics, fault detection & diagnosis, predictive maintenance alerts and energy-saving intelligence — continuously learning.
          </p>
        </div>

        {/* --- HEADER BUTTONS --- */}
        <div className="flex items-center gap-3 self-start md:mt-10">
          <Button className="bg-[#0b1727] hover:bg-slate-800/60 text-slate-200 border border-slate-800 text-xs px-4 py-2 rounded-lg flex items-center gap-2 font-semibold transition-colors">
            <Sparkles className="w-4 h-4 text-slate-300" />
            <span>Model insights</span>
          </Button>

          <Button className="bg-[#2dd4bf] hover:bg-teal-300 text-slate-950 font-bold text-xs px-4 py-2 rounded-lg flex items-center gap-2 transition-colors">
            <Plus className="w-4 h-4 stroke-[3]" />
            <span>Action alert</span>
          </Button>
        </div>
      </div>

      {/* --- STAT CARDS --- */}
      <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-4 gap-4 mb-6">
        {/* Card 1: Predicted failures */}
        <StatCard
          variant="icon"
          title="Predicted failures"
          value="1"
          icon={ShieldAlert}
          badgeText="≤ 30 days"
          badgeClassName="text-rose-400 lowercase font-mono"
          iconContainerClassName="bg-rose-950/40 border-rose-800/30 text-rose-400"
        />

        {/* Card 2: Savings opportunity */}
        <StatCard
          variant="icon"
          title="Savings opportunity"
          value="₹3.5 L"
          icon={Zap}
          badgeText="per month"
          badgeClassName="text-emerald-400 lowercase font-mono"
          iconContainerClassName="bg-emerald-950/40 border-emerald-800/30 text-emerald-400"
        />

        {/* Card 3: Active anomalies */}
        <StatCard
          variant="icon"
          title="Active anomalies"
          value="4"
          icon={AlertTriangle}
          badgeText="flagged"
          badgeClassName="text-amber-400 lowercase font-mono"
          iconContainerClassName="bg-amber-950/40 border-amber-800/30 text-amber-400"
        />

        {/* Card 4: Model confidence */}
        <StatCard
          variant="icon"
          title="Model confidence"
          value="87%"
          icon={Activity}
          badgeText="average"
          badgeClassName="text-slate-400 lowercase font-mono"
          iconContainerClassName="bg-blue-950/50 border-blue-800/30 text-blue-400"
        />
      </div>

      {/* --- CARDS SECTION BELOW STATCARDS --- */}
      <div className="grid grid-cols-1 lg:grid-cols-12 gap-6 mb-6">
        {/* Left Card: Predictive maintenance alerts */}
        <Card className="lg:col-span-7 bg-[#0b1727] border border-slate-800/80 p-5 rounded-xl">
          <CardHeader 
            title="Predictive maintenance alerts" 
            subtitle="ML · condition-based" 
          />
          <div className="divide-y divide-slate-800/60 mt-4">
            <div className="py-3 flex items-start justify-between">
              <div className="flex items-start gap-3">
                <span className="w-2 h-2 rounded-full bg-rose-500 mt-2 shrink-0" />
                <div>
                  <h4 className="text-sm font-semibold text-slate-100">Chiller-02 compressor</h4>
                  <p className="text-xs text-slate-400 mt-0.5">Bearing wear — likely failure in ~18 days</p>
                </div>
              </div>
              <div className="text-right">
                <span className="text-xs font-semibold text-rose-400">91%</span>
                <p className="text-[10px] text-slate-500">confidence</p>
              </div>
            </div>

            <div className="py-3 flex items-start justify-between">
              <div className="flex items-start gap-3">
                <span className="w-2 h-2 rounded-full bg-amber-400 mt-2 shrink-0" />
                <div>
                  <h4 className="text-sm font-semibold text-slate-100">AHU-07 drive belt</h4>
                  <p className="text-xs text-slate-400 mt-0.5">Vibration trend rising — inspect within 10 days</p>
                </div>
              </div>
              <div className="text-right">
                <span className="text-xs font-semibold text-amber-400">78%</span>
                <p className="text-[10px] text-slate-500">confidence</p>
              </div>
            </div>

            <div className="py-3 flex items-start justify-between">
              <div className="flex items-start gap-3">
                <span className="w-2 h-2 rounded-full bg-amber-400 mt-2 shrink-0" />
                <div>
                  <h4 className="text-sm font-semibold text-slate-100">DG-01 fuel system</h4>
                  <p className="text-xs text-slate-400 mt-0.5">Efficiency drop 6% — filter service due</p>
                </div>
              </div>
              <div className="text-right">
                <span className="text-xs font-semibold text-amber-400">84%</span>
                <p className="text-[10px] text-slate-500">confidence</p>
              </div>
            </div>

            <div className="py-3 flex items-start justify-between">
              <div className="flex items-start gap-3">
                <span className="w-2 h-2 rounded-full bg-blue-400 mt-2 shrink-0" />
                <div>
                  <h4 className="text-sm font-semibold text-slate-100">Lift-03 door motor</h4>
                  <p className="text-xs text-slate-400 mt-0.5">Cycle-time anomaly — monitor</p>
                </div>
              </div>
              <div className="text-right">
                <span className="text-xs font-semibold text-blue-400">64%</span>
                <p className="text-[10px] text-slate-500">confidence</p>
              </div>
            </div>
          </div>
        </Card>

        {/* Right Card: Energy intelligence */}
        <Card className="lg:col-span-5 bg-[#0b1727] border border-slate-800/80 p-5 rounded-xl">
          <CardHeader 
            title="Energy intelligence" 
            subtitle="forecast savings" 
          />
          <div className="mt-4">
            <div className="grid grid-cols-12 text-[11px] font-semibold text-slate-400 uppercase tracking-wider pb-2 border-b border-slate-800/60">
              <div className="col-span-4">Area</div>
              <div className="col-span-5">Recommendation</div>
              <div className="col-span-3 text-right">Saving</div>
            </div>

            <div className="divide-y divide-slate-800/60 text-xs">
              <div className="grid grid-cols-12 py-3.5 items-center">
                <div className="col-span-4 font-semibold text-slate-200">HVAC scheduling</div>
                <div className="col-span-5 text-slate-400">Shift pre-cooling to off-peak</div>
                <div className="col-span-3 text-right font-medium text-emerald-400">₹1.8 L/mo</div>
              </div>

              <div className="grid grid-cols-12 py-3.5 items-center">
                <div className="col-span-4 font-semibold text-slate-200">Lighting</div>
                <div className="col-span-5 text-slate-400">Daylight dimming zones L2–L5</div>
                <div className="col-span-3 text-right font-medium text-emerald-400">₹0.6 L/mo</div>
              </div>

              <div className="grid grid-cols-12 py-3.5 items-center">
                <div className="col-span-4 font-semibold text-slate-200">Chiller staging</div>
                <div className="col-span-5 text-slate-400">Optimise sequencing logic</div>
                <div className="col-span-3 text-right font-medium text-emerald-400">₹1.1 L/mo</div>
              </div>
            </div>
          </div>
        </Card>
      </div>

      <div className="mt-5">
        <InfoBanner 
          boldText='How it works:' 
          normalText='IoT/BMS sensor streams feed fault-detection models → predictions surface as alerts → one click raises a condition-based PM work order → verified completion feeds back to improve the model.'
        />
      </div>
    </div>
  );
}