import { useState } from 'react'
import { PieChart, Pie, Cell, ResponsiveContainer, LineChart, Line, XAxis } from 'recharts'
import { Plus, Server, Activity, AlertTriangle, DollarSign } from 'lucide-react'

const subTabs = ['Overview']

const statusCards = [
  { label: 'Total Resources', value: '128', icon: Server, sub: '+4 this week' },
  { label: 'Healthy', value: '124', icon: Activity, sub: '96.9%', color: '#2ECC71' },
  { label: 'Warnings', value: '3', icon: AlertTriangle, sub: 'Needs attention', color: '#E67E22' },
  { label: 'Critical', value: '1', icon: AlertTriangle, sub: 'Action required', color: '#E74C3C' },
  { label: 'Monthly Cost', value: '$24,560.75', icon: DollarSign, sub: '↑ 3.2% MTD' },
]

const costData = [
  { name: 'Compute', value: 38, color: '#C8A434' },
  { name: 'Storage', value: 22, color: '#E67E22' },
  { name: 'Database', value: 25, color: '#2ECC71' },
  { name: 'Network', value: 15, color: '#7A7D85' },
]

const nodes = [
  { name: 'web-frontend-lb', status: 'healthy' },
  { name: 'app-server-01', status: 'healthy' },
  { name: 'app-server-02', status: 'healthy' },
  { name: 'app-server-03', status: 'warning' },
  { name: 'db-primary-01', status: 'healthy' },
  { name: 'db-replica-02', status: 'healthy' },
  { name: 'cache-cluster-02', status: 'critical' },
  { name: 'batch-worker-04', status: 'healthy' },
  { name: 'storage-node-01', status: 'healthy' },
  { name: 'storage-node-02', status: 'healthy' },
  { name: 'monitoring-01', status: 'healthy' },
  { name: 'vpn-gateway', status: 'warning' },
]

const nodeStatusColor: Record<string, string> = {
  healthy: '#2ECC71',
  warning: '#E67E22',
  critical: '#E74C3C',
}

const trendData = Array.from({ length: 14 }, (_, i) => ({
  day: i,
  compute: 60 + i * 0.6 + Math.sin(i / 2) * 3,
  storage: 35 + i * 0.4 + Math.cos(i / 3) * 2,
  database: 20 + i * 0.2 + Math.sin(i / 4) * 1.5,
  network: 45 + i * 0.3 + Math.cos(i / 2.5) * 2.5,
}))

const activities = [
  { title: 'Auto-scaling triggered', source: 'App Server Group', time: '4m ago' },
  { title: 'Resource provisioned', source: 'db-replica-02', time: '19m ago' },
  { title: 'Health check failed', source: 'cache-cluster-02', time: '27m ago' },
  { title: 'Tag updated', source: '12 resources', time: '1h ago' },
]

const cardBase: React.CSSProperties = {
  backgroundColor: 'rgba(10, 10, 12, 0.92)',
  border: '1px solid rgba(200, 164, 52, 0.08)',
  borderRadius: '12px',
  padding: '20px',
  boxShadow: '0 0 20px rgba(200, 164, 52, 0.03)',
  transition: 'border-color 0.2s ease',
  position: 'relative',
  overflow: 'hidden',
  height: '100%',
  display: 'flex',
  flexDirection: 'column',
}

const sectionTitle: React.CSSProperties = {
  fontSize: '11px',
  textTransform: 'uppercase',
  letterSpacing: '1.5px',
  color: '#7A7D85',
  fontWeight: 500,
  marginBottom: '16px',
}

function framedCard(bgUrl: string): React.CSSProperties {
  return {
    backgroundImage: `url(${bgUrl})`,
    backgroundSize: '100% 100%',
    backgroundPosition: 'center',
    backgroundRepeat: 'no-repeat',
    position: 'relative',
    overflow: 'hidden',
    height: '100%',
    display: 'flex',
    flexDirection: 'column',
    padding: '20px 20px 64px 20px',
  }
}

const cardVignette: React.CSSProperties = {
  position: 'absolute',
  inset: 0,
  pointerEvents: 'none',
  background: 'radial-gradient(ellipse closest-side at center, transparent 70%, var(--color-page) 100%)',
}

const cardDim: React.CSSProperties = {
  position: 'absolute',
  inset: 0,
  pointerEvents: 'none',
  backgroundColor: 'rgba(8, 8, 10, 0.45)',
}

const distributionData = [
  { name: 'Compute', value: 42, color: '#C8A434' },
  { name: 'Storage', value: 28, color: '#E67E22' },
  { name: 'Database', value: 18, color: '#2ECC71' },
  { name: 'Network', value: 12, color: '#7A7D85' },
]

function Donut({ data, centerLabel }: { data: { name: string; value: number; color: string }[]; centerLabel?: string }) {
  return (
    <div className="flex flex-1 items-center gap-4">
      <div className="relative" style={{ width: '120px', height: '120px', flexShrink: 0 }}>
        <ResponsiveContainer width="100%" height="100%">
          <PieChart>
            <Pie data={data} dataKey="value" innerRadius={38} outerRadius={56} paddingAngle={2} isAnimationActive animationDuration={1000}>
              {data.map((entry) => (
                <Cell key={entry.name} fill={entry.color} stroke="none" />
              ))}
            </Pie>
          </PieChart>
        </ResponsiveContainer>
        {centerLabel && (
          <div className="absolute inset-0 flex items-center justify-center pointer-events-none">
            <span style={{ fontSize: '18px', fontWeight: 700, color: '#E8E6E0' }}>{centerLabel}</span>
          </div>
        )}
      </div>
      <div className="flex flex-col gap-2">
        {data.map((entry) => (
          <div key={entry.name} className="flex items-center gap-2">
            <span style={{ width: '8px', height: '8px', borderRadius: '50%', backgroundColor: entry.color, flexShrink: 0 }} />
            <span style={{ fontSize: '12px', color: '#E8E6E0', width: '70px' }}>{entry.name}</span>
            <span style={{ fontSize: '12px', color: '#7A7D85' }}>{entry.value}%</span>
          </div>
        ))}
      </div>
    </div>
  )
}

export default function Infrastructure() {
  const [activeTab, setActiveTab] = useState('Overview')

  return (
    <>
      {/* Sub-tabs + Add Resource — hero banner is rendered at the layout level behind this */}
      <div className="flex items-center justify-between shrink-0">
        <div className="flex items-center gap-1 overflow-x-auto" style={{ scrollbarWidth: 'none' }}>
          {subTabs.map((tab) => {
            const active = tab === activeTab
            return (
              <button
                key={tab}
                onClick={() => setActiveTab(tab)}
                className="cursor-pointer bg-transparent border-none transition-colors whitespace-nowrap"
                style={{
                  fontSize: '12px',
                  fontWeight: 500,
                  padding: '8px 14px',
                  borderRadius: '8px',
                  color: active ? '#C8A434' : '#7A7D85',
                  backgroundColor: active ? 'rgba(200,164,52,0.1)' : 'transparent',
                }}
              >
                {tab}
              </button>
            )
          })}
        </div>
        <button
          className="flex items-center gap-2 cursor-pointer transition-colors whitespace-nowrap"
          style={{
            fontSize: '12px',
            fontWeight: 600,
            color: '#0A0B0D',
            backgroundColor: '#C8A434',
            border: 'none',
            borderRadius: '8px',
            padding: '9px 16px',
            boxShadow: '0 0 14px rgba(200,164,52,0.2)',
          }}
        >
          <Plus size={14} />
          Add Resource
        </button>
      </div>

      {/* Status Cards */}
      <div className="grid w-full grid-cols-5 gap-5 shrink-0" style={{ marginTop: '8px', height: '110px' }}>
        {statusCards.map((card) => {
          const Icon = card.icon
          return (
            <div
              key={card.label}
              style={{ ...cardBase, backgroundColor: 'rgba(10, 10, 12, 0.5)', padding: '18px', justifyContent: 'center', alignItems: 'center', gap: '8px' }}
              className="hover:!border-gold/20"
            >
              <h3 style={{ fontSize: '10px', textTransform: 'uppercase', letterSpacing: '1.5px', color: '#7A7D85', fontWeight: 500, textAlign: 'center' }}>
                {card.label}
              </h3>
              <div className="flex items-center gap-2">
                <Icon size={18} style={{ color: card.color ?? '#C8A434' }} />
                <span style={{ fontSize: '26px', fontWeight: 700, color: '#E8E6E0', lineHeight: 1 }}>{card.value}</span>
              </div>
              <p style={{ fontSize: '10px', color: card.color ?? '#7A7D85', textAlign: 'center' }}>{card.sub}</p>
            </div>
          )
        })}
      </div>

      {/* Middle Row */}
      <div className="min-h-0 flex-1">
        <div className="grid h-full w-full grid-cols-[1fr_1.6fr] gap-6">
          {/* Resource Distribution */}
          <div style={framedCard('/blank-kpi-bg.png')}>
            <div style={cardDim} />
            <div style={cardVignette} />
            <div className="relative z-10 flex flex-1 flex-col">
              <h3 style={sectionTitle}>Resource Distribution</h3>
              <div className="flex flex-1 flex-col items-center justify-center">
                <Donut data={distributionData} />
              </div>
            </div>
          </div>

          {/* Node Status — expanded */}
          <div style={framedCard('/blank-kpi-bg.png')}>
            <div style={cardDim} />
            <div style={cardVignette} />
            <div className="relative z-10 flex flex-1 flex-col">
              <h3 style={sectionTitle}>Node Status</h3>
              <div className="grid flex-1 grid-cols-4 gap-3 content-center">
                {nodes.map((node) => (
                  <div
                    key={node.name}
                    title={`${node.name}: ${node.status}`}
                    style={{
                      backgroundColor: 'rgba(10, 10, 12, 0.55)',
                      border: `1px solid ${nodeStatusColor[node.status]}33`,
                      borderRadius: '8px',
                      padding: '10px 12px',
                      display: 'flex',
                      flexDirection: 'column',
                      gap: '6px',
                    }}
                  >
                    <div className="flex items-center gap-1.5">
                      <span style={{ width: '7px', height: '7px', borderRadius: '50%', backgroundColor: nodeStatusColor[node.status], boxShadow: `0 0 6px ${nodeStatusColor[node.status]}` }} />
                      <Server size={12} style={{ color: '#7A7D85' }} />
                    </div>
                    <span style={{ fontSize: '11px', color: '#E8E6E0', whiteSpace: 'nowrap', overflow: 'hidden', textOverflow: 'ellipsis' }}>{node.name}</span>
                  </div>
                ))}
              </div>
            </div>
          </div>
        </div>
      </div>

      {/* Bottom Row */}
      <div className="shrink-0">
        <div className="grid w-full grid-cols-[1.4fr_1fr_1fr] gap-6">
          {/* Resource Trend */}
          <div style={{ ...cardBase, height: 'auto', ...framedCard('/archnest-network-traffic-bg.png'), padding: '20px' }} className="hover:!border-gold/15">
            <div className="relative z-10">
              <h3 style={sectionTitle}>Resource Trend</h3>
              <div style={{ height: '100px' }}>
                <ResponsiveContainer width="100%" height="100%">
                  <LineChart data={trendData} margin={{ top: 0, right: 0, left: 0, bottom: 0 }}>
                    <XAxis dataKey="day" hide />
                    <Line type="monotone" dataKey="compute" stroke="#3B82F6" strokeWidth={1.5} dot={false} isAnimationActive animationDuration={1000} />
                    <Line type="monotone" dataKey="storage" stroke="#E67E22" strokeWidth={1.5} dot={false} isAnimationActive animationDuration={1000} />
                    <Line type="monotone" dataKey="database" stroke="#2ECC71" strokeWidth={1.5} dot={false} isAnimationActive animationDuration={1000} />
                    <Line type="monotone" dataKey="network" stroke="#8B5E3C" strokeWidth={1.5} dot={false} isAnimationActive animationDuration={1000} />
                  </LineChart>
                </ResponsiveContainer>
              </div>
            </div>
          </div>

          {/* Cost Breakdown */}
          <div style={{ ...cardBase, height: 'auto' }} className="hover:!border-gold/15">
            <div className="relative z-10 flex flex-col">
              <h3 style={sectionTitle}>Cost Breakdown (MTD)</h3>
              <Donut data={costData} centerLabel="$24.5K" />
            </div>
          </div>

          {/* Recent Activity */}
          <div style={{ ...cardBase, height: 'auto' }} className="hover:!border-gold/15">
            <div className="relative z-10">
              <h3 style={sectionTitle}>Recent Activity</h3>
              <div className="flex flex-col gap-3">
                {activities.map((item, i) => (
                  <div key={i} className="flex items-start justify-between gap-3">
                    <div style={{ flex: 1, minWidth: 0 }}>
                      <p style={{ fontSize: '12px', color: '#E8E6E0', fontWeight: 500, whiteSpace: 'nowrap', overflow: 'hidden', textOverflow: 'ellipsis' }}>{item.title}</p>
                      <p style={{ fontSize: '11px', color: '#7A7D85', whiteSpace: 'nowrap', overflow: 'hidden', textOverflow: 'ellipsis' }}>{item.source}</p>
                    </div>
                    <span style={{ fontSize: '11px', color: '#7A7D85', flexShrink: 0 }}>{item.time}</span>
                  </div>
                ))}
              </div>
            </div>
          </div>
        </div>
      </div>

      {/* Footer stats bar */}
      <div
        className="shrink-0 flex items-center justify-center gap-3"
        style={{
          fontSize: '11px',
          color: '#7A7D85',
          padding: '8px 0',
          borderTop: '1px solid rgba(200,164,52,0.08)',
        }}
      >
        <span>AWS</span><span style={{ color: 'rgba(200,164,52,0.3)' }}>|</span>
        <span>6 Regions</span><span style={{ color: 'rgba(200,164,52,0.3)' }}>|</span>
        <span>18 AZs</span><span style={{ color: 'rgba(200,164,52,0.3)' }}>|</span>
        <span>128 Resources</span><span style={{ color: 'rgba(200,164,52,0.3)' }}>|</span>
        <span style={{ color: '#2ECC71' }}>98.7% Health</span><span style={{ color: 'rgba(200,164,52,0.3)' }}>|</span>
        <span>$24,560.75 MTD</span><span style={{ color: 'rgba(200,164,52,0.3)' }}>|</span>
        <span style={{ color: '#E67E22' }}>2 Alerts</span>
      </div>
    </>
  )
}