'use client'

import { motion } from 'framer-motion'
import { useState, useEffect } from 'react'
import { Activity, TrendingUp, Zap, Shield } from 'lucide-react'

function AnimatedNumber({ value, suffix = '' }: { value: number; suffix?: string }) {
  const [displayValue, setDisplayValue] = useState(0)

  useEffect(() => {
    const duration = 2000 // 2 seconds
    const steps = 60
    const increment = value / steps
    const stepDuration = duration / steps

    let currentStep = 0
    const interval = setInterval(() => {
      currentStep++
      if (currentStep <= steps) {
        setDisplayValue(Math.floor(increment * currentStep))
      } else {
        setDisplayValue(value)
        clearInterval(interval)
      }
    }, stepDuration)

    return () => clearInterval(interval)
  }, [value])

  return (
    <span className="font-mono text-2xl lg:text-3xl font-bold text-[hsl(var(--teal))] tabular-nums">
      {displayValue.toLocaleString()}{suffix}
    </span>
  )
}

function FluctuatingNumber({ base, variance }: { base: number; variance: number }) {
  const [value, setValue] = useState(base)

  useEffect(() => {
    const interval = setInterval(() => {
      const fluctuation = (Math.random() - 0.5) * variance
      setValue(base + fluctuation)
    }, 1500)

    return () => clearInterval(interval)
  }, [base, variance])

  return (
    <span className="font-mono text-2xl lg:text-3xl font-bold text-[hsl(var(--teal))] tabular-nums">
      {Math.round(value)}ms
    </span>
  )
}

export function LiveStatsBar() {
  const stats = [
    {
      icon: <Activity className="h-5 w-5" />,
      label: 'Checks performed today',
      value: 2847,
      type: 'counter' as const
    },
    {
      icon: <TrendingUp className="h-5 w-5" />,
      label: 'Changes detected this hour',
      value: 127,
      type: 'counter' as const
    },
    {
      icon: <Shield className="h-5 w-5" />,
      label: 'Uptime',
      value: '99.9%',
      type: 'static' as const
    },
    {
      icon: <Zap className="h-5 w-5" />,
      label: 'Avg response time',
      value: '< ',
      type: 'fluctuating' as const,
      base: 42,
      variance: 10
    }
  ]

  return (
    <section className="border-y border-border bg-gradient-to-r from-foreground/95 via-foreground to-foreground/95 dark:from-secondary dark:via-secondary dark:to-secondary py-8 overflow-hidden">
      <div className="mx-auto max-w-7xl px-6">
        {/* Desktop: Grid */}
        <div className="hidden lg:grid lg:grid-cols-4 gap-8">
          {stats.map((stat, i) => (
            <motion.div
              key={i}
              initial={{ opacity: 0, y: 20 }}
              whileInView={{ opacity: 1, y: 0 }}
              viewport={{ once: true }}
              transition={{ delay: i * 0.1, duration: 0.5 }}
              className="flex flex-col items-center text-center gap-3"
            >
              {/* Icon */}
              <motion.div
                className="flex items-center justify-center w-12 h-12 rounded-full bg-[hsl(var(--teal))]/10 text-[hsl(var(--teal))]"
                whileHover={{ scale: 1.1, rotate: 5 }}
                transition={{ duration: 0.2 }}
              >
                {stat.icon}
              </motion.div>

              {/* Value */}
              <div>
                {stat.type === 'counter' && typeof stat.value === 'number' && (
                  <AnimatedNumber value={stat.value} />
                )}
                {stat.type === 'static' && (
                  <span className="font-mono text-2xl lg:text-3xl font-bold text-[hsl(var(--teal))]">
                    {stat.value}
                  </span>
                )}
                {stat.type === 'fluctuating' && stat.base && stat.variance && (
                  <span className="font-mono text-2xl lg:text-3xl font-bold text-[hsl(var(--teal))]">
                    {stat.value}<FluctuatingNumber base={stat.base} variance={stat.variance} />
                  </span>
                )}
              </div>

              {/* Label */}
              <p className="text-xs font-medium text-white/90 uppercase tracking-wider">
                {stat.label}
              </p>
            </motion.div>
          ))}
        </div>

        {/* Mobile: Horizontal Scroll */}
        <div className="lg:hidden overflow-x-auto scrollbar-thin pb-2">
          <div className="flex gap-8 min-w-max px-4">
            {stats.map((stat, i) => (
              <motion.div
                key={i}
                initial={{ opacity: 0, x: 20 }}
                whileInView={{ opacity: 1, x: 0 }}
                viewport={{ once: true }}
                transition={{ delay: i * 0.1, duration: 0.5 }}
                className="flex flex-col items-center text-center gap-3 min-w-[160px]"
              >
                {/* Icon */}
                <div className="flex items-center justify-center w-10 h-10 rounded-full bg-[hsl(var(--teal))]/10 text-[hsl(var(--teal))]">
                  {stat.icon}
                </div>

                {/* Value */}
                <div>
                  {stat.type === 'counter' && typeof stat.value === 'number' && (
                    <AnimatedNumber value={stat.value} />
                  )}
                  {stat.type === 'static' && (
                    <span className="font-mono text-2xl font-bold text-[hsl(var(--teal))]">
                      {stat.value}
                    </span>
                  )}
                  {stat.type === 'fluctuating' && stat.base && stat.variance && (
                    <span className="font-mono text-2xl font-bold text-[hsl(var(--teal))]">
                      {stat.value}<FluctuatingNumber base={stat.base} variance={stat.variance} />
                    </span>
                  )}
                </div>

                {/* Label */}
                <p className="text-[10px] font-medium text-white/90 uppercase tracking-wider">
                  {stat.label}
                </p>
              </motion.div>
            ))}
          </div>
        </div>
      </div>
    </section>
  )
}
