'use client'

import { useState } from 'react'
import { useQuery } from '@tanstack/react-query'
import { useSession } from 'next-auth/react'
import { createCrossplaneClient } from '@/lib/crossplane-client'
import { Card, CardContent, CardHeader, CardTitle } from '../ui/Card'
import { Input } from '../ui/Input'
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '../ui/select'
import { Badge } from '../ui/badge'
import { Button } from '../ui/Button'
import { Server, Database, Network, HardDrive } from 'lucide-react'

interface CrossplaneResource {
  apiVersion: string
  kind: string
  metadata: {
    name: string
    namespace: string
    uid: string
    creationTimestamp: string
    labels?: Record<string, string>
  }
  spec?: any
  status?: any
}

export default function CrossplaneResourceBrowser() {
  const { data: session } = useSession()
  const [search, setSearch] = useState('')
  const [filterKind, setFilterKind] = useState<string>('all')
  const [filterNamespace, setFilterNamespace] = useState<string>('all')

  // This would need to be implemented to query Crossplane resources
  // For now, we'll use a placeholder that shows the structure
  const { data: resources = [], isLoading } = useQuery<CrossplaneResource[]>({
    queryKey: ['crossplane-resources', filterKind, filterNamespace],
    queryFn: async () => {
      // In a real implementation, this would query the Kubernetes API
      // for Crossplane managed resources
      const crossplane = createCrossplaneClient(session?.accessToken as string)
      
      // Get VMs as an example
      try {
        const vms = await crossplane.getVMs()
        return vms.map((vm) => ({
          apiVersion: process.env.NEXT_PUBLIC_CROSSPLANE_API_GROUP || 'proxmox.sankofa.nexus/v1alpha1',
          kind: 'ProxmoxVM',
          metadata: vm.metadata,
          spec: vm.spec,
          status: vm.status,
        }))
      } catch (error) {
        console.error('Failed to fetch Crossplane resources:', error)
        return []
      }
    },
    enabled: !!session,
  })

  const getResourceIcon = (kind: string) => {
    if (kind.includes('VM') || kind.includes('VirtualMachine')) {
      return <Server className="h-5 w-5 text-blue-500" />
    }
    if (kind.includes('Storage') || kind.includes('Volume')) {
      return <HardDrive className="h-5 w-5 text-green-500" />
    }
    if (kind.includes('Network')) {
      return <Network className="h-5 w-5 text-purple-500" />
    }
    if (kind.includes('Database')) {
      return <Database className="h-5 w-5 text-yellow-500" />
    }
    return <Server className="h-5 w-5 text-gray-500" />
  }

  const getResourceStatusColor = (status: any) => {
    if (!status) return 'bg-gray-500'
    
    const state = status.state || status.phase || 'Unknown'
    switch (state.toLowerCase()) {
      case 'running':
      case 'ready':
      case 'active':
        return 'bg-green-500'
      case 'pending':
      case 'provisioning':
        return 'bg-yellow-500'
      case 'failed':
      case 'error':
        return 'bg-red-500'
      default:
        return 'bg-gray-500'
    }
  }

  const filteredResources = resources.filter((resource) => {
    const matchesSearch = resource.metadata.name.toLowerCase().includes(search.toLowerCase())
    const matchesKind = filterKind === 'all' || resource.kind === filterKind
    const matchesNamespace =
      filterNamespace === 'all' || resource.metadata.namespace === filterNamespace
    return matchesSearch && matchesKind && matchesNamespace
  })

  const uniqueKinds = Array.from(new Set(resources.map((r) => r.kind)))
  const uniqueNamespaces = Array.from(new Set(resources.map((r) => r.metadata.namespace)))

  return (
    <div className="space-y-4">
      <div className="flex items-center justify-between">
        <h2 className="text-2xl font-bold">Crossplane Resources</h2>
      </div>

      <div className="flex gap-4">
        <Input
          placeholder="Search resources..."
          value={search}
          onChange={(e) => setSearch(e.target.value)}
          className="flex-1"
        />
        <Select value={filterKind} onValueChange={setFilterKind}>
          <SelectTrigger className="w-[200px]">
            <SelectValue placeholder="Resource Type" />
          </SelectTrigger>
          <SelectContent>
            <SelectItem value="all">All Types</SelectItem>
            {uniqueKinds.map((kind) => (
              <SelectItem key={kind} value={kind}>
                {kind}
              </SelectItem>
            ))}
          </SelectContent>
        </Select>
        <Select value={filterNamespace} onValueChange={setFilterNamespace}>
          <SelectTrigger className="w-[200px]">
            <SelectValue placeholder="Namespace" />
          </SelectTrigger>
          <SelectContent>
            <SelectItem value="all">All Namespaces</SelectItem>
            {uniqueNamespaces.map((ns) => (
              <SelectItem key={ns} value={ns}>
                {ns}
              </SelectItem>
            ))}
          </SelectContent>
        </Select>
      </div>

      {isLoading ? (
        <div className="flex items-center justify-center p-8">
          <div className="animate-spin rounded-full h-8 w-8 border-b-2 border-blue-600"></div>
        </div>
      ) : filteredResources.length === 0 ? (
        <Card>
          <CardContent className="p-8 text-center text-gray-400">
            No Crossplane resources found
          </CardContent>
        </Card>
      ) : (
        <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-3">
          {filteredResources.map((resource) => (
            <Card key={resource.metadata.uid}>
              <CardHeader>
                <div className="flex items-center justify-between">
                  <div className="flex items-center gap-2">
                    {getResourceIcon(resource.kind)}
                    <CardTitle className="text-lg">{resource.metadata.name}</CardTitle>
                  </div>
                  <div
                    className={`h-3 w-3 rounded-full ${getResourceStatusColor(resource.status)}`}
                    title={resource.status?.state || 'Unknown'}
                  />
                </div>
              </CardHeader>
              <CardContent>
                <div className="space-y-2">
                  <div className="flex items-center justify-between">
                    <span className="text-sm text-gray-500">Kind:</span>
                    <Badge>{resource.kind}</Badge>
                  </div>
                  <div className="flex items-center justify-between">
                    <span className="text-sm text-gray-500">Namespace:</span>
                    <span className="text-sm">{resource.metadata.namespace}</span>
                  </div>
                  <div className="flex items-center justify-between">
                    <span className="text-sm text-gray-500">API Version:</span>
                    <span className="text-sm text-gray-400">{resource.apiVersion}</span>
                  </div>
                  {resource.status?.state && (
                    <div className="flex items-center justify-between">
                      <span className="text-sm text-gray-500">State:</span>
                      <Badge variant="outline">{resource.status.state}</Badge>
                    </div>
                  )}
                  {resource.status?.ipAddress && (
                    <div className="flex items-center justify-between">
                      <span className="text-sm text-gray-500">IP Address:</span>
                      <span className="text-sm font-mono">{resource.status.ipAddress}</span>
                    </div>
                  )}
                  {resource.metadata.labels && Object.keys(resource.metadata.labels).length > 0 && (
                    <div className="mt-2 pt-2 border-t border-gray-700">
                      <div className="text-xs text-gray-500 mb-1">Labels:</div>
                      <div className="flex flex-wrap gap-1">
                        {Object.entries(resource.metadata.labels).map(([key, value]) => (
                          <Badge key={key} variant="outline" className="text-xs">
                            {key}={value}
                          </Badge>
                        ))}
                      </div>
                    </div>
                  )}
                </div>
              </CardContent>
            </Card>
          ))}
        </div>
      )}
    </div>
  )
}