import { Server, Wifi, WifiOff, Trash2, ChevronDown, ChevronUp, RefreshCw, Cpu, MemoryStick, ArrowUp, ArrowDown, Pencil, BarChart2, CloudDownload, Copy, Check } from 'lucide-react'
import { useState } from 'react'
import ContainerRow from './ContainerRow'
import { tagColor } from './TagInput'

function formatBytes(bps) {
  if (bps < 1024)         return `${bps.toFixed(0)} B/s`
  if (bps < 1024 * 1024)  return `${(bps / 1024).toFixed(1)} KB/s`
  return `${(bps / 1024 / 1024).toFixed(1)} MB/s`
}

function formatRam(bytes) {
  if (bytes < 1024 ** 3) return `${(bytes / 1024 ** 2).toFixed(0)} MB`
  return `${(bytes / 1024 ** 3).toFixed(1)} GB`
}

export default function VpsCard({ vps, onAction, onLogs, onDelete, onUpdate, onEdit, onStats, onUpdateAgent, onExport }) {
  const [collapsed, setCollapsed] = useState(false)
  const [updatingProject, setUpdatingProject] = useState(null)
  const [updatingAgent, setUpdatingAgent] = useState(false)
  const [exported, setExported] = useState(false)

  const handleExport = async () => {
    await onExport(vps.id)
    setExported(true)
    setTimeout(() => setExported(false), 2000)
  }

  const running = vps.containers.filter(c => c.status === 'running').length
  const total   = vps.containers.length

  const composeProjects = [...new Set(vps.containers.map(c => c.compose_project).filter(Boolean))]

  const handleUpdate = async (project) => {
    setUpdatingProject(project)
    try { await onUpdate(vps.id, project) } finally { setUpdatingProject(null) }
  }

  const handleUpdateAgent = async () => {
    setUpdatingAgent(true)
    try { await onUpdateAgent(vps.id) } finally { setUpdatingAgent(false) }
  }

  return (
    <div className="bg-gray-900 border border-gray-800 rounded-xl overflow-hidden flex flex-col">
      {/* Header */}
      <div className="flex items-center gap-3 px-4 py-3 border-b border-gray-800">
        <div className={`p-2 rounded-lg flex-shrink-0 ${vps.online ? 'bg-emerald-500/10' : 'bg-red-500/10'}`}>
          <Server size={15} className={vps.online ? 'text-emerald-400' : 'text-red-400'} />
        </div>

        <div className="flex-1 min-w-0">
          <h3 className="font-semibold text-sm truncate">{vps.name}</h3>
          <p className="text-xs text-gray-500 truncate">{vps.host}</p>
        </div>

        <div className="flex items-center gap-2 flex-shrink-0">
          {vps.online ? (
            <span className="flex items-center gap-1.5 text-xs text-emerald-400">
              <Wifi size={12} />
              <span className="hidden sm:inline">{running}/{total} actifs</span>
            </span>
          ) : (
            <span className="flex items-center gap-1.5 text-xs text-red-400">
              <WifiOff size={12} />
              <span className="hidden sm:inline">Hors ligne</span>
            </span>
          )}

          <button
            onClick={() => setCollapsed(c => !c)}
            className="p-1.5 rounded hover:bg-gray-800 text-gray-500 hover:text-gray-300 transition-colors"
            title={collapsed ? 'Déplier' : 'Replier'}
          >
            {collapsed ? <ChevronDown size={14} /> : <ChevronUp size={14} />}
          </button>

          {vps.online && (
            <button
              onClick={() => onStats(vps.id, vps.name)}
              className="p-1.5 rounded hover:bg-gray-800 text-gray-500 hover:text-indigo-400 transition-colors"
              title="Graphiques de performance"
            >
              <BarChart2 size={14} />
            </button>
          )}

          <button
            onClick={handleExport}
            className={`p-1.5 rounded hover:bg-gray-800 transition-colors ${exported ? 'text-emerald-400' : 'text-gray-500 hover:text-gray-300'}`}
            title={exported ? 'Config copiée !' : 'Exporter la config (copier JSON)'}
          >
            {exported ? <Check size={14} /> : <Copy size={14} />}
          </button>

          <button
            onClick={() => onEdit(vps)}
            className="p-1.5 rounded hover:bg-gray-800 text-gray-500 hover:text-gray-300 transition-colors"
            title="Modifier ce VPS"
          >
            <Pencil size={14} />
          </button>

          <button
            onClick={() => onDelete(vps.id)}
            className="p-1.5 rounded hover:bg-red-500/20 text-gray-500 hover:text-red-400 transition-colors"
            title="Supprimer ce VPS"
          >
            <Trash2 size={14} />
          </button>
        </div>
      </div>

      {/* Erreur de connexion */}
      {!vps.online && vps.error && (
        <div className="px-4 py-2.5 bg-red-950/30 border-b border-red-900/30 text-xs text-red-400 font-mono">
          {vps.error}
        </div>
      )}

      {/* Version de l'agent + bouton mise à jour */}
      {vps.online && (
        <div className="px-4 py-2 border-b border-gray-800/60 flex items-center gap-3">
          <span className="text-xs text-gray-500">Agent&nbsp;:</span>
          {vps.agent_version ? (
            <span
              className={`inline-flex items-center gap-1 px-2 py-0.5 rounded-full text-xs font-medium border ${
                vps.agent_up_to_date
                  ? 'bg-emerald-500/10 border-emerald-500/30 text-emerald-400'
                  : 'bg-orange-500/10 border-orange-500/30 text-orange-400'
              }`}
              title={vps.agent_up_to_date ? 'Agent à jour' : `Mise à jour disponible (attendu : ${vps.expected_agent_version})`}
            >
              {vps.agent_up_to_date ? '✓' : '⚠'} v{vps.agent_version}
            </span>
          ) : (
            <span className="inline-flex items-center gap-1 px-2 py-0.5 rounded-full text-xs font-medium border bg-gray-700/30 border-gray-600/30 text-gray-500">
              inconnu
            </span>
          )}
          {(!vps.agent_up_to_date || vps.agent_version === 'unknown') && (
            <button
              onClick={handleUpdateAgent}
              disabled={updatingAgent}
              className="flex items-center gap-1.5 px-2.5 py-1 rounded-lg text-xs bg-orange-500/10 border border-orange-500/30 text-orange-300 hover:bg-orange-500/30 hover:text-orange-100 transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
              title={`Mettre à jour l'agent vers v${vps.expected_agent_version}`}
            >
              <CloudDownload size={11} className={updatingAgent ? 'animate-bounce' : ''} />
              {updatingAgent ? 'Mise à jour...' : 'Mettre à jour l\'agent'}
            </button>
          )}
        </div>
      )}

      {/* Boutons de mise à jour par projet compose */}
      {vps.online && composeProjects.length > 0 && (
        <div className="px-4 py-2 border-b border-gray-800/60 flex flex-wrap gap-2">
          {composeProjects.map(project => (
            <button
              key={project}
              onClick={() => handleUpdate(project)}
              disabled={!!updatingProject}
              className="flex items-center gap-1.5 px-2.5 py-1 rounded-lg text-xs bg-indigo-600/20 border border-indigo-500/30 text-indigo-300 hover:bg-indigo-600/40 hover:text-indigo-100 transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
              title={`docker compose pull && up -d (${project})`}
            >
              <RefreshCw size={11} className={updatingProject === project ? 'animate-spin' : ''} />
              Update {project}
            </button>
          ))}
        </div>
      )}

      {/* Informations système */}
      {vps.online && vps.system && !collapsed && (
        <div className="px-4 py-2 border-b border-gray-800/60 flex flex-wrap gap-x-4 gap-y-1 text-xs text-gray-400 bg-gray-900/50">
          <span className="flex items-center gap-1">
            <Cpu size={11} className="text-indigo-400" />
            CPU <span className={`font-medium ml-0.5 ${vps.system.cpu_percent > 80 ? 'text-red-400' : vps.system.cpu_percent > 60 ? 'text-yellow-400' : 'text-emerald-400'}`}>{vps.system.cpu_percent.toFixed(1)}%</span>
          </span>
          <span className="flex items-center gap-1">
            <MemoryStick size={11} className="text-indigo-400" />
            RAM <span className={`font-medium ml-0.5 ${vps.system.ram_percent > 80 ? 'text-red-400' : vps.system.ram_percent > 60 ? 'text-yellow-400' : 'text-emerald-400'}`}>{formatRam(vps.system.ram_used)}/{formatRam(vps.system.ram_total)}</span>
            <span className="text-gray-600">({vps.system.ram_percent.toFixed(0)}%)</span>
          </span>
          <span className="flex items-center gap-1">
            <ArrowUp size={11} className="text-sky-400" />{formatBytes(vps.system.net_sent_per_sec)}
            <ArrowDown size={11} className="text-violet-400 ml-1" />{formatBytes(vps.system.net_recv_per_sec)}
          </span>
        </div>
      )}

      {/* Tags */}
      {vps.tags?.length > 0 && !collapsed && (
        <div className="px-4 py-2 border-b border-gray-800/60 flex flex-wrap gap-1.5">
          {vps.tags.map(tag => (
            <span
              key={tag}
              className={`inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium border ${tagColor(tag)}`}
            >
              {tag}
            </span>
          ))}
        </div>
      )}

      {/* Description */}
      {vps.description && !collapsed && (
        <p className="px-4 py-2 text-xs text-gray-500 border-b border-gray-800/60">{vps.description}</p>
      )}

      {/* Conteneurs */}
      {!collapsed && vps.online && (
        <div className="divide-y divide-gray-800/50 flex-1">
          {total === 0 ? (
            <p className="px-4 py-6 text-sm text-gray-600 text-center">Aucun conteneur détecté.</p>
          ) : (
            vps.containers.map(c => (
              <ContainerRow
                key={c.id}
                container={c}
                onAction={(action) => onAction(vps.id, c.id, action)}
                onLogs={() => onLogs(vps.id, c.id, `${vps.name} / ${c.name}`)}
              />
            ))
          )}
        </div>
      )}

      {/* Footer stats */}
      {!collapsed && vps.online && total > 0 && (
        <div className="px-4 py-2 border-t border-gray-800/60 flex gap-4 text-xs text-gray-600">
          <span><span className="text-emerald-500">{running}</span> en cours</span>
          <span><span className="text-gray-400">{total - running}</span> arrêtés</span>
          <span><span className="text-gray-400">{total}</span> total</span>
        </div>
      )}
    </div>
  )
}
