import { useState } from 'react'
import { 
  Puzzle, 
  Settings2,
  Search,
  Grid,
  List
} from 'lucide-react'
import { useAppStore } from '../store/appStore'
import type { Plugin } from '../store/appStore'

export default function Plugins() {
  const { plugins, activatePlugin, deactivatePlugin } = useAppStore()
  const [searchQuery, setSearchQuery] = useState('')
  const [viewMode, setViewMode] = useState<'grid' | 'list'>('grid')
  const [_selectedPlugin, __setSelectedPlugin] = useState<Plugin | null>(null)

  const filteredPlugins = plugins.filter(p => 
    p.name.toLowerCase().includes(searchQuery.toLowerCase()) ||
    p.description.toLowerCase().includes(searchQuery.toLowerCase())
  )

  const activePlugins = filteredPlugins.filter(p => p.active)
  const inactivePlugins = filteredPlugins.filter(p => !p.active)

  return (
    <div className="space-y-6">
      <div className="flex items-center justify-between">
        <div>
          <h2 className="text-2xl font-bold text-white">Plugins</h2>
          <p className="text-text-muted mt-1">Manage your EU-Utility plugins</p>
        </div>

        <div className="flex items-center gap-3">
          <div className="relative">
            <Search className="w-5 h-5 text-text-muted absolute left-3 top-1/2 -translate-y-1/2" />
            <input
              type="text"
              value={searchQuery}
              onChange={(e) => setSearchQuery(e.target.value)}
              placeholder="Search plugins..."
              className="pl-10 pr-4 py-2 bg-surface border border-border rounded-lg text-sm focus:outline-none focus:border-primary w-64"
            />
          </div>

          <div className="flex items-center gap-1 bg-surface rounded-lg p-1 border border-border">
            <button
              onClick={() => setViewMode('grid')}
              className={`p-2 rounded ${viewMode === 'grid' ? 'bg-surface-light text-white' : 'text-text-muted'}`}
            >
              <Grid className="w-4 h-4" />
            </button>
            <button
              onClick={() => setViewMode('list')}
              className={`p-2 rounded ${viewMode === 'list' ? 'bg-surface-light text-white' : 'text-text-muted'}`}
            >
              <List className="w-4 h-4" />
            </button>
          </div>
        </div>
      </div>

      {/* Active Plugins */}
      {activePlugins.length > 0 && (
        <div>
          <h3 className="text-sm font-semibold text-text-muted uppercase tracking-wider mb-3">Active Plugins ({activePlugins.length})</h3>
          <div className={viewMode === 'grid' ? 'grid grid-cols-3 gap-4' : 'space-y-2'}>
            {activePlugins.map((plugin) => (
              <PluginCard
                key={plugin.id}
                plugin={plugin}
                onActivate={() => activatePlugin(plugin.id)}
                onDeactivate={() => deactivatePlugin(plugin.id)}
                onClick={() => _setSelectedPlugin(plugin)}
                viewMode={viewMode}
              />
            ))}
          </div>
        </div>
      )}

      {/* Inactive Plugins */}
      {inactivePlugins.length > 0 && (
        <div>
          <h3 className="text-sm font-semibold text-text-muted uppercase tracking-wider mb-3">Inactive Plugins ({inactivePlugins.length})</h3>
          <div className={viewMode === 'grid' ? 'grid grid-cols-3 gap-4' : 'space-y-2'}>
            {inactivePlugins.map((plugin) => (
              <PluginCard
                key={plugin.id}
                plugin={plugin}
                onActivate={() => activatePlugin(plugin.id)}
                onDeactivate={() => deactivatePlugin(plugin.id)}
                onClick={() => _setSelectedPlugin(plugin)}
                viewMode={viewMode}
              />
            ))}
          </div>
        </div>
      )}

      {/* Empty State */}
      {filteredPlugins.length === 0 && (
        <div className="text-center py-12">
          <Puzzle className="w-16 h-16 text-text-muted mx-auto mb-4" />
          <p className="text-white font-medium">No plugins found</p>
          <p className="text-text-muted text-sm mt-1">Try adjusting your search</p>
        </div>
      )}
    </div>
  )
}

interface PluginCardProps {
  plugin: Plugin
  onActivate: () => void
  onDeactivate: () => void
  onClick: () => void
  viewMode: 'grid' | 'list'
}

function PluginCard({ plugin, onActivate, onDeactivate, onClick, viewMode }: PluginCardProps) {
  if (viewMode === 'list') {
    return (
      <div className="flex items-center gap-4 p-4 bg-surface rounded-lg border border-border hover:border-primary/30 transition-colors">
        <div className="w-12 h-12 rounded-xl bg-primary/10 flex items-center justify-center flex-shrink-0">
          <Puzzle className="w-6 h-6 text-primary" />
        </div>

        <div className="flex-1 min-w-0">
          <h4 className="font-semibold text-white truncate">{plugin.name}</h4>
          <p className="text-sm text-text-muted truncate">{plugin.description}</p>
        </div>

        <div className="flex items-center gap-3">
          <span className="text-xs text-text-muted">v{plugin.version}</span>
          
          {plugin.active ? (
            <button
              onClick={onDeactivate}
              className="px-3 py-1.5 bg-accent text-white text-sm font-medium rounded-lg hover:bg-accent-hover transition-colors"
            >
              Deactivate
            </button>
          ) : (
            <button
              onClick={onActivate}
              className="px-3 py-1.5 bg-primary text-white text-sm font-medium rounded-lg hover:bg-primary-hover transition-colors"
            >
              Activate
            </button>
          )}
        </div>
      </div>
    )
  }

  return (
    <div className="bg-surface rounded-xl p-5 border border-border hover:border-primary/30 transition-colors group">
      <div className="flex items-start justify-between mb-4">
        <div className="w-12 h-12 rounded-xl bg-primary/10 flex items-center justify-center">
          <Puzzle className="w-6 h-6 text-primary" />
        </div>

        {plugin.active ? (
          <div className="flex items-center gap-1.5 px-2 py-1 bg-accent/10 rounded-full">
            <div className="w-2 h-2 rounded-full bg-accent" />
            <span className="text-xs font-medium text-accent">Active</span>
          </div>
        ) : (
          <div className="flex items-center gap-1.5 px-2 py-1 bg-surface-light rounded-full">
            <div className="w-2 h-2 rounded-full bg-text-muted" />
            <span className="text-xs font-medium text-text-muted">Inactive</span>
          </div>
        )}
      </div>

      <h4 className="font-semibold text-white mb-1">{plugin.name}</h4>
      <p className="text-sm text-text-muted mb-4 line-clamp-2">{plugin.description}</p>

      <div className="flex items-center justify-between text-xs text-text-muted mb-4">
        <span>{plugin.author}</span>
        <span>v{plugin.version}</span>
      </div>

      <div className="flex gap-2">
        {plugin.active ? (
          <>
            <button
              onClick={onDeactivate}
              className="flex-1 px-3 py-2 bg-surface-light hover:bg-surface-light/80 text-text rounded-lg text-sm font-medium transition-colors border border-border"
            >
              Deactivate
            </button>
            <button
              onClick={onClick}
              className="px-3 py-2 bg-primary hover:bg-primary-hover text-white rounded-lg transition-colors"
            >
              <Settings2 className="w-4 h-4" />
            </button>
          </>
        ) : (
          <button
            onClick={onActivate}
            className="w-full px-3 py-2 bg-primary hover:bg-primary-hover text-white rounded-lg text-sm font-medium transition-colors"
          >
            Activate
          </button>
        )}
      </div>
    </div>
  )
}