"use client";

import React, { useState, useMemo } from "react";
import { TrendingDown, Activity, Settings2, BarChart3 } from "lucide-react";
import { cn } from "../utils/cn";
import { ComponentShareButton } from "./ComponentShareButton";
import { Reveal } from "./Reveal";

export function RevenueLossCalculator() {
    const [visitors, setVisitors] = useState(5000);
    const [conversionRate] = useState(2.0);
    const [orderValue, setOrderValue] = useState(150);
    const [loadTime, setLoadTime] = useState(4.0);
    const shareId = "revenue-loss-v1";

    const LOSS_PER_SECOND = 0.07;
    const BASE_SPEED = 2.5;

    const results = useMemo(() => {
        const delay = Math.max(0, loadTime - BASE_SPEED);
        const dropFactor = 1 - (1 - LOSS_PER_SECOND) ** delay;

        const currentOrders = visitors * (conversionRate / 100);
        const currentRevenue = currentOrders * orderValue;

        const potentialRevenue = currentRevenue / (1 - dropFactor);
        const lostRevenue = potentialRevenue - currentRevenue;
        const lostOrders = (potentialRevenue - currentRevenue) / orderValue;

        return {
            lostRevenue: Math.round(lostRevenue),
            lostOrders: Math.round(lostOrders),
            potentialRevenue: Math.round(potentialRevenue),
        };
    }, [visitors, conversionRate, orderValue, loadTime]);

    return (
        <Reveal direction="up" delay={0.1}>
            <div id={shareId} className="w-full max-w-2xl mx-auto my-16 group relative transition-all duration-500 ease-out z-10 font-sans">
                {/* Ambient Glow */}
                <div className="absolute -inset-1 bg-gradient-to-r from-red-100/30 to-slate-100/30 rounded-[2.5rem] blur opacity-10 group-hover:opacity-30 transition duration-1000 -z-10" />

                <div className="glass bg-white/80 backdrop-blur-xl border border-slate-100 rounded-3xl shadow-sm group-hover:shadow-md group-hover:border-slate-200 transition-all duration-500 overflow-hidden relative">

                    {/* Header */}
                    <div className="border-b border-slate-100 p-6 flex items-center justify-between relative z-20">
                        <div className="flex items-center gap-3">
                            <div className="p-2 rounded-xl bg-slate-50 border border-slate-100 group-hover:bg-red-50 group-hover:border-red-100 group-hover:text-red-500 transition-colors">
                                <TrendingDown className="w-5 h-5" />
                            </div>
                            <div>
                                <h4 className="text-sm font-black tracking-[0.2em] text-slate-800 uppercase m-0 leading-none">
                                    REVENUE_SIMULATOR
                                </h4>
                                <p className="text-[10px] text-slate-400 font-bold uppercase tracking-widest mt-1">Performance x Conversion</p>
                            </div>
                        </div>

                        <div className="flex items-center gap-4">
                            <div className="hidden md:flex items-center gap-1.5 px-3 py-1 rounded-full bg-emerald-50 border border-emerald-100">
                                <Activity className="w-3 h-3 text-emerald-500 animate-pulse" />
                                <span className="text-[10px] font-black text-emerald-600 uppercase tracking-widest">LIVE_ENGINE</span>
                            </div>
                            <div className="opacity-0 group-hover:opacity-100 transition-opacity duration-500">
                                <ComponentShareButton targetId={shareId} title="Performance Revenue Simulator" />
                            </div>
                        </div>
                    </div>

                    <div className="grid grid-cols-1 md:grid-cols-5 relative z-10">
                        {/* Controls */}
                        <div className="md:col-span-3 p-8 space-y-10 border-b md:border-b-0 md:border-r border-slate-100 bg-white/40">

                            {/* Traffic */}
                            <div className="space-y-5">
                                <div className="flex justify-between items-end">
                                    <div className="flex items-center gap-2">
                                        <Settings2 className="w-3 h-3 text-slate-400" />
                                        <span className="text-[10px] font-black text-slate-500 uppercase tracking-widest">Monatlicher Traffic</span>
                                    </div>
                                    <span className="text-xl font-black text-slate-900 tabular-nums leading-none">
                                        {visitors.toLocaleString()} <span className="text-[10px] text-slate-400 font-bold">VISITS</span>
                                    </span>
                                </div>
                                <div className="relative group/slider">
                                    <input
                                        type="range"
                                        min="500" max="100000" step="500"
                                        value={visitors}
                                        onChange={(e) => setVisitors(Number(e.target.value))}
                                        className="w-full h-1.5 bg-slate-100 rounded-full appearance-none outline-none [&::-webkit-slider-thumb]:appearance-none [&::-webkit-slider-thumb]:w-4 [&::-webkit-slider-thumb]:h-4 [&::-webkit-slider-thumb]:bg-white [&::-webkit-slider-thumb]:border-2 [&::-webkit-slider-thumb]:border-slate-800 [&::-webkit-slider-thumb]:rounded-full cursor-pointer hover:[&::-webkit-slider-thumb]:scale-110 [&::-webkit-slider-thumb]:transition-transform"
                                    />
                                </div>
                            </div>

                            {/* Order Value */}
                            <div className="space-y-5">
                                <div className="flex justify-between items-end">
                                    <div className="flex items-center gap-2">
                                        <BarChart3 className="w-3 h-3 text-slate-400" />
                                        <span className="text-[10px] font-black text-slate-500 uppercase tracking-widest">Ø Kundenwert</span>
                                    </div>
                                    <span className="text-xl font-black text-slate-900 tabular-nums leading-none">
                                        €{orderValue.toLocaleString()}
                                    </span>
                                </div>
                                <div className="relative group/slider">
                                    <input
                                        type="range"
                                        min="10" max="5000" step="10"
                                        value={orderValue}
                                        onChange={(e) => setOrderValue(Number(e.target.value))}
                                        className="w-full h-1.5 bg-slate-100 rounded-full appearance-none outline-none [&::-webkit-slider-thumb]:appearance-none [&::-webkit-slider-thumb]:w-4 [&::-webkit-slider-thumb]:h-4 [&::-webkit-slider-thumb]:bg-white [&::-webkit-slider-thumb]:border-2 [&::-webkit-slider-thumb]:border-slate-800 [&::-webkit-slider-thumb]:rounded-full cursor-pointer hover:[&::-webkit-slider-thumb]:scale-110 [&::-webkit-slider-thumb]:transition-transform"
                                    />
                                </div>
                            </div>

                            {/* Load Time */}
                            <div className="space-y-5 pt-8 border-t border-slate-100 border-dashed">
                                <div className="flex justify-between items-end">
                                    <div className="flex flex-col">
                                        <span className="text-[10px] font-black text-slate-500 uppercase tracking-widest mb-1">Website Ladezeit</span>
                                        <span className={cn("text-[8px] font-bold uppercase px-1.5 py-0.5 rounded w-fit",
                                            loadTime > 2.5 ? "bg-red-50 text-red-500" : "bg-emerald-50 text-emerald-500"
                                        )}>
                                            {loadTime > 2.5 ? "Kritisch > 2.5s" : "Optimal < 2.5s"}
                                        </span>
                                    </div>
                                    <span className={cn("text-3xl font-black tabular-nums tracking-tighter transition-colors",
                                        loadTime > 2.5 ? "text-red-500" : "text-slate-900"
                                    )}>
                                        {loadTime.toFixed(1)}s
                                    </span>
                                </div>
                                <div className="relative group/slider">
                                    <input
                                        type="range"
                                        min="1.0" max="15.0" step="0.5"
                                        value={loadTime}
                                        onChange={(e) => setLoadTime(Number(e.target.value))}
                                        className={cn("w-full h-1.5 rounded-full appearance-none outline-none [&::-webkit-slider-thumb]:appearance-none [&::-webkit-slider-thumb]:w-5 [&::-webkit-slider-thumb]:h-5 [&::-webkit-slider-thumb]:bg-white [&::-webkit-slider-thumb]:border-2 [&::-webkit-slider-thumb]:rounded-full cursor-pointer hover:[&::-webkit-slider-thumb]:scale-110 transition-all",
                                            loadTime > 2.5 ? "bg-red-100 [&::-webkit-slider-thumb]:border-red-500" : "bg-slate-100 [&::-webkit-slider-thumb]:border-slate-800"
                                        )}
                                    />
                                </div>
                            </div>
                        </div>

                        {/* Results */}
                        <div className="md:col-span-2 p-8 flex flex-col justify-center space-y-10 bg-slate-50/20 backdrop-blur-sm relative overflow-hidden">
                            {/* Decorative Background Icon */}
                            <TrendingDown className="absolute -bottom-10 -right-10 w-48 h-48 text-slate-200/20 rotate-12 -z-10" />

                            <div className="relative">
                                <span className="block text-[10px] font-black text-slate-400 uppercase tracking-[0.2em] mb-3">Entgangener Umsatz <span className="text-[8px] text-slate-300">(MTL.)</span></span>
                                <div className="flex items-baseline gap-2">
                                    <span className={cn("text-5xl font-black tracking-tighter transition-colors",
                                        results.lostRevenue > 0 ? "text-red-500" : "text-slate-900"
                                    )}>
                                        €{results.lostRevenue.toLocaleString()}
                                    </span>
                                </div>
                            </div>

                            <div className="relative">
                                <span className="block text-[10px] font-black text-slate-400 uppercase tracking-[0.2em] mb-3">Verlorene Leads <span className="text-[8px] text-slate-300">(MTL.)</span></span>
                                <div className="flex items-baseline gap-2">
                                    <span className="text-4xl font-extrabold text-slate-800 tracking-tight tracking-tighter">
                                        {results.lostOrders}
                                    </span>
                                    <span className="text-[10px] font-black text-slate-400 uppercase">Nutzer</span>
                                </div>
                            </div>

                            <div className="pt-6 border-t border-slate-100">
                                <p className="text-[9px] font-bold text-slate-300 uppercase tracking-[0.2em] leading-relaxed">
                                    REF: GOOGLE + AKAMAI_DATA<br />
                                    <span className="text-slate-400">(0.07 DROP RATE PER SECOND)</span>
                                </p>
                            </div>
                        </div>

                    </div>
                </div>
            </div>
        </Reveal>
    );
}