'use client'

/**
 * Korrektur-Workspace (Admin Route)
 *
 * Main correction interface with 2/3 - 1/3 layout:
 * - Left (2/3): Document viewer with annotation overlay
 * - Right (1/3): Criteria scoring, Gutachten editor, Annotations
 */

import { useParams, useRouter } from 'next/navigation'
import AdminLayout from '@/components/admin/AdminLayout'
import { useKorrekturWorkspace } from '@/components/klausur-korrektur/useKorrekturWorkspace'
import WorkspaceTopBar from '@/components/klausur-korrektur/WorkspaceTopBar'
import DocumentViewer from '@/components/klausur-korrektur/DocumentViewer'
import CorrectionPanel from '@/components/klausur-korrektur/CorrectionPanel'
import EinigungModal from '@/components/klausur-korrektur/EinigungModal'
import ErrorBanner from '@/components/klausur-korrektur/ErrorBanner'
import AnnotationLayer from '../../components/AnnotationLayer'
import AnnotationToolbar from '../../components/AnnotationToolbar'
import AnnotationPanel from '../../components/AnnotationPanel'
import EHSuggestionPanel from '../../components/EHSuggestionPanel'

export default function KorrekturWorkspacePage() {
  const params = useParams()
  const router = useRouter()
  const klausurId = params.klausurId as string
  const studentId = params.studentId as string

  const ws = useKorrekturWorkspace({ klausurId, studentId })

  const goToStudent = (direction: 'prev' | 'next') => {
    const newIndex = direction === 'prev' ? ws.currentIndex - 1 : ws.currentIndex + 1
    if (newIndex >= 0 && newIndex < ws.students.length) {
      router.push(`/admin/klausur-korrektur/${klausurId}/${ws.students[newIndex].id}`)
    }
  }

  if (ws.loading) {
    return (
      <AdminLayout title="Laedt..." description="">
        <div className="flex items-center justify-center h-[calc(100vh-200px)]">
          <div className="animate-spin rounded-full h-8 w-8 border-b-2 border-primary-600"></div>
        </div>
      </AdminLayout>
    )
  }

  return (
    <AdminLayout
      title={`Korrektur: ${ws.student?.anonym_id || 'Student'}`}
      description={ws.klausur?.title || ''}
    >
      <WorkspaceTopBar
        klausurId={klausurId}
        backPath={`/admin/klausur-korrektur/${klausurId}`}
        currentIndex={ws.currentIndex}
        studentCount={ws.students.length}
        workflow={ws.workflow}
        saving={ws.saving}
        totals={ws.totals}
        onGoToStudent={goToStudent}
      />

      {ws.showEinigungModal && ws.workflow && (
        <EinigungModal
          workflow={ws.workflow}
          einigungGrade={ws.einigungGrade}
          einigungNotes={ws.einigungNotes}
          submittingWorkflow={ws.submittingWorkflow}
          onGradeChange={ws.setEinigungGrade}
          onNotesChange={ws.setEinigungNotes}
          onSubmit={ws.submitEinigung}
          onClose={() => ws.setShowEinigungModal(false)}
        />
      )}

      {ws.error && <ErrorBanner error={ws.error} onDismiss={() => ws.setError(null)} />}

      <div className="flex gap-6 h-[calc(100vh-280px)]">
        <DocumentViewer
          student={ws.student}
          documentUrl={ws.documentUrl}
          zoom={ws.zoom}
          currentPage={ws.currentPage}
          totalPages={ws.totalPages}
          annotations={ws.annotations}
          selectedTool={ws.selectedTool}
          selectedAnnotation={ws.selectedAnnotation}
          annotationCounts={ws.annotationCounts}
          onZoomChange={ws.setZoom}
          onPageChange={ws.setCurrentPage}
          onSelectTool={ws.setSelectedTool}
          onCreateAnnotation={ws.createAnnotation}
          onSelectAnnotation={(ann) => {
            ws.setSelectedAnnotation(ann)
            ws.setActiveTab('annotationen')
          }}
          AnnotationToolbarComponent={AnnotationToolbar}
          AnnotationLayerComponent={AnnotationLayer}
        />

        <CorrectionPanel
          activeTab={ws.activeTab}
          onTabChange={ws.setActiveTab}
          annotations={ws.annotations}
          gradeInfo={ws.gradeInfo}
          criteriaScores={ws.criteriaScores}
          gutachten={ws.gutachten}
          totals={ws.totals}
          workflow={ws.workflow}
          saving={ws.saving}
          generatingGutachten={ws.generatingGutachten}
          exporting={ws.exporting}
          submittingWorkflow={ws.submittingWorkflow}
          selectedAnnotation={ws.selectedAnnotation}
          studentId={studentId}
          klausurId={klausurId}
          klausurEhId={ws.klausur?.eh_id}
          onCriteriaChange={ws.handleCriteriaChange}
          onGutachtenChange={ws.setGutachten}
          onSaveGutachten={ws.saveGutachten}
          onGenerateGutachten={ws.generateGutachten}
          onExportGutachtenPDF={ws.exportGutachtenPDF}
          onSelectAnnotation={ws.setSelectedAnnotation}
          onUpdateAnnotation={ws.updateAnnotation}
          onDeleteAnnotation={ws.deleteAnnotation}
          onSelectTool={ws.setSelectedTool}
          onSetActiveTab={ws.setActiveTab}
          onSubmitErstkorrektur={ws.submitErstkorrektur}
          onStartZweitkorrektur={ws.startZweitkorrektur}
          onSubmitZweitkorrektur={ws.submitZweitkorrektur}
          onShowEinigungModal={() => ws.setShowEinigungModal(true)}
          AnnotationPanelComponent={AnnotationPanel}
          EHSuggestionPanelComponent={EHSuggestionPanel}
        />
      </div>
    </AdminLayout>
  )
}