/**
 * ArtifactsSidebar - Floating list of all artifacts in current conversation
 * 
 * Appears in bottom-right of the side panel.
 * Lists all artifacts with download buttons and click-to-switch functionality.
 */

import { useArtifacts } from '@/hooks/useArtifacts'
import { cn } from '@/lib/utils'
import { IconDownload, IconFileText, IconCode } from '@tabler/icons-react'

type ArtifactsSidebarProps = {
  threadId: string
}

export function ArtifactsSidebar({ threadId }: ArtifactsSidebarProps) {
  const artifacts = useArtifacts()
  const threadArtifacts = artifacts.threadArtifacts[threadId] || []
  const activeArtifactId = artifacts.threadIndex[threadId]?.active_artifact_id

  const handleDownloadAll = () => {
    // Download all artifacts as individual files
    threadArtifacts.forEach((artifact: any) => {
      const blob = new Blob([artifact.content], { type: 'text/plain' })
      const url = URL.createObjectURL(blob)
      const a = document.createElement('a')
      a.href = url
      a.download = artifact.file_path.split('/').pop() || 'artifact.txt'
      document.body.appendChild(a)
      a.click()
      document.body.removeChild(a)
      URL.revokeObjectURL(url)
    })
  }

  const handleSelectArtifact = (artifactId: string) => {
    artifacts.setActiveArtifact(threadId, artifactId)
  }

  const handleDownloadSingle = (artifact: any, e: React.MouseEvent) => {
    e.stopPropagation() // Prevent selecting the artifact
    const blob = new Blob([artifact.content], { type: 'text/plain' })
    const url = URL.createObjectURL(blob)
    const a = document.createElement('a')
    a.href = url
    a.download = artifact.file_path.split('/').pop() || 'artifact.txt'
    document.body.appendChild(a)
    a.click()
    document.body.removeChild(a)
    URL.revokeObjectURL(url)
  }

  const getArtifactIcon = (artifact: any) => {
    if (artifact.content_type.startsWith('text/x-')) {
      return <IconCode size={14} />
    }
    return <IconFileText size={14} />
  }

  const getFileType = (artifact: any) => {
    const ext = artifact.file_path.split('.').pop()
    return ext?.toUpperCase() || 'TXT'
  }

  if (threadArtifacts.length === 0) {
    return null
  }

  return (
    <div className="bg-background border border-main-view-fg/10 rounded-lg shadow-lg overflow-hidden">
      {/* Header */}
      <div className="flex items-center justify-between p-3 border-b border-main-view-fg/10 bg-main-view-fg/5">
        <h3 className="text-xs font-semibold text-main-view-fg">Artifacts</h3>
        {threadArtifacts.length > 1 && (
          <button
            onClick={handleDownloadAll}
            className="flex items-center gap-1.5 px-2 py-1 text-xs font-medium text-main-view-fg/70 hover:text-main-view-fg hover:bg-main-view-fg/10 rounded transition-colors"
          >
            <IconDownload size={12} />
            Download all
          </button>
        )}
      </div>

      {/* Artifact List */}
      <div className="max-h-64 overflow-y-auto">
        {threadArtifacts.map((artifact) => (
          <button
            key={artifact.id}
            onClick={() => handleSelectArtifact(artifact.id)}
            className={cn(
              "w-full flex items-center gap-2 p-3 text-left transition-colors border-b border-main-view-fg/5 last:border-b-0",
              artifact.id === activeArtifactId
                ? "bg-main-view-fg/10"
                : "hover:bg-main-view-fg/5"
            )}
          >
            <div className="flex-shrink-0 text-main-view-fg/60">
              {getArtifactIcon(artifact)}
            </div>
            <div className="flex-1 min-w-0">
              <div className="text-xs font-medium text-main-view-fg truncate">
                {artifact.name}
              </div>
              <div className="text-xs text-main-view-fg/50 mt-0.5">
                {artifact.content_type === 'text/markdown' ? 'Document' : 'Code'} · {getFileType(artifact)}
              </div>
            </div>
            <button
              onClick={(e) => handleDownloadSingle(artifact, e)}
              className="flex-shrink-0 p-1.5 hover:bg-main-view-fg/10 rounded transition-colors"
              title="Download"
            >
              <IconDownload size={14} />
            </button>
          </button>
        ))}
      </div>
    </div>
  )
}