import type { GpoBackupStatusRecord, ProjectAssessmentHistoryResponse } from '../../api/assessor-api-contract';
import type { AssessmentProject, ImportFileRecord } from '../../domain/canonical-model';
import { groupProjectImportFiles } from './datahub-import-groups';
import { summarizeClientProcessingReadiness } from './datahub-processing-readiness';
import type { DatahubTimeslotResultMetrics } from './datahub-scan-analysis';
import { DonutMetricCard } from '../../components/DonutMetricCard/DonutMetricCard';
import type { TimeslotOpenReadiness } from './datahub-open-readiness';
import { PanelLoadingState } from '../../components/PanelLoadingState/PanelLoadingState';

export interface DatahubTimeslotSelection {
  projectId: string;
  slots: Array<{ id: string; runIds: string[]; assessmentIds: string[]; effectiveAt: string }>;
}

interface DatahubHistoryOverviewProps {
  projects: AssessmentProject[];
  projectData: Record<string, ImportFileRecord[]>;
  projectHistory: Record<string, ProjectAssessmentHistoryResponse>;
  projectGpoData: Record<string, GpoBackupStatusRecord[]>;
  projectOpenReadiness?: Record<string, Record<string, TimeslotOpenReadiness>>;
  selection: DatahubTimeslotSelection | null;
  timeslotMetrics: DatahubTimeslotResultMetrics | null;
  loading: boolean;
  comparisonBusy: boolean;
  comparisonError: string | null;
  onCreate(): void;
  onShow(project: AssessmentProject): void;
  onOpen(project: AssessmentProject, scanRunIds: string[], assessmentIds?: string[]): void;
  onSelectProject(projectId: string): void;
}

function formatDate(value: string): string {
  const date = new Date(value);
  return Number.isNaN(date.getTime()) ? '—' : date.toLocaleDateString('de-DE');
}

function resultPercentage(value: number, total: number): number {
  return total > 0 ? Math.min(100, Math.max(0, (value / total) * 100)) : 0;
}

export function DatahubHistoryOverview({
  projects,
  projectData,
  projectHistory,
  projectGpoData,
  projectOpenReadiness = {},
  selection,
  timeslotMetrics,
  loading,
  comparisonBusy,
  comparisonError,
  onCreate,
  onShow,
  onOpen,
  onSelectProject
}: DatahubHistoryOverviewProps) {
  const resultMetrics = timeslotMetrics ?? { all: null, deviation: null, passed: null, notApplicable: null, notRun: null, error: null };
  const pendingLabel = loading || comparisonBusy ? 'Loading…'
    : comparisonError ? 'Unavailable' : selection ? 'No results' : 'Select client';

  return <>
    <section className="datahub-rack-module datahub-status-module" aria-label="Selected client result status" aria-busy={loading || comparisonBusy}>
      <div className="datahub-reference-controls donut-metric-rack">
        <DonutMetricCard className="datahub-reference-knob" label="Results All" value={resultMetrics.all} percentage={resultMetrics.all !== null ? 100 : 0} tone="all" pendingLabel={pendingLabel}/>
        <DonutMetricCard className="datahub-reference-knob" label="Deviation" value={resultMetrics.deviation} percentage={resultPercentage(resultMetrics.deviation ?? 0, resultMetrics.all ?? 0)} tone="deviation" pendingLabel={pendingLabel}/>
        <DonutMetricCard className="datahub-reference-knob" label="Passed" value={resultMetrics.passed} percentage={resultPercentage(resultMetrics.passed ?? 0, resultMetrics.all ?? 0)} tone="passed" pendingLabel={pendingLabel}/>
        <DonutMetricCard className="datahub-reference-knob" label="Not Applicable" value={resultMetrics.notApplicable} percentage={resultPercentage(resultMetrics.notApplicable ?? 0, resultMetrics.all ?? 0)} tone="not-applicable" pendingLabel={pendingLabel}/>
        <DonutMetricCard className="datahub-reference-knob" label="Not Run" value={resultMetrics.notRun} percentage={resultPercentage(resultMetrics.notRun ?? 0, resultMetrics.all ?? 0)} tone="not-run" pendingLabel={pendingLabel}/>
        <DonutMetricCard className="datahub-reference-knob" label="Error" value={resultMetrics.error} percentage={resultPercentage(resultMetrics.error ?? 0, resultMetrics.all ?? 0)} tone="error" pendingLabel={pendingLabel}/>
      </div>
      {comparisonError && <em className="datahub-comparison-error" role="alert">{comparisonError}</em>}
    </section>

    <section className="datahub-rack-module datahub-tenants-module" aria-label="Mandanten">
      {loading ? <PanelLoadingState message="Loading clients …" compact/> : (
        <div className="datahub-tenant-card-rack">
          {projects.map(project => {
            const history = projectHistory[project.id];
            const groups = groupProjectImportFiles(
              projectData[project.id] ?? [],
              history?.assessments,
              history?.scanRuns,
              projectGpoData[project.id] ?? []
            );
            const latest = groups[0];
            const latestOpenable = groups.find(group => projectOpenReadiness[project.id]?.[group.id]?.canOpen);
            const activeProcessingRunIds = groups.flatMap(group => group.scanRunIds);
            const processingSummary = summarizeClientProcessingReadiness(
              projectData[project.id] ?? [],
              activeProcessingRunIds,
              projectGpoData[project.id] ?? []
            );
            const selected = selection?.projectId === project.id;
            return <article className={`donut-metric-card donut-metric-card--all datahub-tenant-card${selected ? ' is-selected' : ''}`} key={project.id}>
              {processingSummary.state !== 'no-data' && <span
                className="datahub-tenant-processing-dot"
                data-status={processingSummary.state}
                role="img"
                aria-label={processingSummary.label}
                title={processingSummary.label}
              />}
              <button
                className="datahub-tenant-select"
                type="button"
                aria-label={`Mandant ${project.name} auswählen`}
                aria-pressed={selected}
                onClick={() => onSelectProject(project.id)}
              >
                <span className="datahub-tenant-name">{project.name}</span>
                <span className="datahub-tenant-summary"><strong>{groups.length.toLocaleString('de-DE')}</strong><small>{groups.length === 1 ? 'Timeslot' : 'Timeslots'}</small></span>
                <span className="datahub-tenant-latest">{latest ? `Latest ${formatDate(latest.fileDate)}` : 'No scan data yet'}</span>
              </button>
              {(selected || processingSummary.state === 'update' || processingSummary.state === 'review' || processingSummary.state === 'error') && <button
                className="btn datahub-tenant-show"
                data-status={processingSummary.state}
                type="button"
                title={['update', 'review', 'error'].includes(processingSummary.state) ? processingSummary.label : 'Manage client'}
                onClick={() => onShow(project)}
              >Manage</button>}
              <button className="btn primary datahub-tenant-open" type="button" disabled={!latestOpenable} title={latestOpenable ? 'Open latest timeslot' : 'No scan data available'} onClick={() => latestOpenable && onOpen(project, latestOpenable.scanRunIds, latestOpenable.assessmentIds)}>Open</button>
            </article>;
          })}
          <button className="donut-metric-card donut-metric-card--all datahub-tenant-card datahub-tenant-add" type="button" onClick={onCreate} aria-label="Mandant anlegen">
            <span aria-hidden="true">＋</span>
          </button>
        </div>
      )}
    </section>
  </>;
}