// [DEF:frontend.src.lib.components.reports.__tests__.reports_filter_performance:Module]
// @TIER: STANDARD
// @SEMANTICS: tests, reports, performance, filtering
// @PURPOSE: Guard test for report filter responsiveness on moderate in-memory dataset.
// @LAYER: UI (Tests)
// @RELATION: TESTS -> frontend/src/routes/reports/+page.svelte

import { describe, it, expect } from 'vitest';

function applyFilters(items, { taskType = 'all', status = 'all' } = {}) {
  return items.filter((item) => {
    const typeMatch = taskType === 'all' || item.task_type === taskType;
    const statusMatch = status === 'all' || item.status === status;
    return typeMatch && statusMatch;
  });
}

function makeDataset(size = 2000) {
  const taskTypes = ['llm_verification', 'backup', 'migration', 'documentation'];
  const statuses = ['success', 'failed', 'in_progress', 'partial'];
  const out = [];
  for (let i = 0; i < size; i += 1) {
    out.push({
      report_id: `r-${i}`,
      task_id: `t-${i}`,
      task_type: taskTypes[i % taskTypes.length],
      status: statuses[i % statuses.length],
      summary: `Report ${i}`,
      updated_at: '2026-02-22T10:00:00Z'
    });
  }
  return out;
}

describe('reports filter performance guard', () => {
  it('applies task_type+status filter quickly on 2000 records', () => {
    const dataset = makeDataset(2000);

    const start = Date.now();
    const result = applyFilters(dataset, { taskType: 'migration', status: 'failed' });
    const duration = Date.now() - start;

    expect(Array.isArray(result)).toBe(true);
    expect(duration).toBeLessThan(100);
  });
});

// [/DEF:frontend.src.lib.components.reports.__tests__.reports_filter_performance:Module]