import { describe, expect, it } from 'vitest';
import { applySavedViewState, initialAppState } from '../../src/app/app-state';
import { makeSheet } from '../../src/importers/sheet-factory';
import type { StorageAdapter } from '../../src/persistence/storage-adapter';
import {
  VIEW_BOOKMARK_LIMIT,
  VIEW_BOOKMARK_STORAGE_KEY,
  captureViewState,
  loadProjectViewBookmarks,
  pathSnapshotFindingIds,
  parseViewBookmarks,
  saveProjectViewBookmarks,
  type ViewBookmark
} from '../../src/features/view-bookmarks/view-bookmarks';

class MemoryStorage implements StorageAdapter {
  values = new Map<string, string>();
  get(key: string) { return this.values.get(key) ?? null; }
  set(key: string, value: string) { this.values.set(key, value); }
  remove(key: string) { this.values.delete(key); }
}

function bookmark(projectId: string, index: number): ViewBookmark {
  return {
    id: `${projectId}-${index}`,
    projectId,
    name: `View ${index}`,
    createdAt: '2026-08-17T00:00:00.000Z',
    view: {
      activeSheetId: 'sheet-a',
      view: 'columns',
      search: '',
      sortColumn: 'all',
      sortDirection: 'desc',
      titleColumn: 'Title',
      statusFilter: 'deviation',
      facetFilters: {},
      actionOnly: false,
      selectedRecordId: ''
    }
  };
}

function pathBookmark(projectId: string, index: number): ViewBookmark {
  return {
    ...bookmark(projectId, index),
    kind: 'path',
    path: {
      activeNodeIds: ['finding:a', 'tactic:b'],
      nodeIds: ['finding:a', 'tactic:b', 'technique:c']
    }
  };
}

describe('view bookmarks', () => {
  it('captures an independent copy of the complete working view', () => {
    const source = {
      ...initialAppState,
      activeSheetId: 'sheet-a',
      view: 'table' as const,
      search: 'synthetic',
      statusFilter: 'deviation',
      facetFilters: { severity: { values: ['critical', 'high'] } },
      selectedRecordId: 'record-a'
    };
    const captured = captureViewState(source);
    source.facetFilters.severity.values?.push('medium');

    expect(captured).toMatchObject({
      activeSheetId: 'sheet-a',
      view: 'table',
      search: 'synthetic',
      statusFilter: 'deviation',
      selectedRecordId: 'record-a'
    });
    expect(captured.facetFilters.severity.values).toEqual(['critical', 'high']);
  });

  it('keeps at most seven bookmarks per project and preserves other projects', () => {
    const storage = new MemoryStorage();
    storage.set(VIEW_BOOKMARK_STORAGE_KEY, JSON.stringify([bookmark('project-b', 1)]));
    saveProjectViewBookmarks(
      storage,
      'project-a',
      Array.from({ length: VIEW_BOOKMARK_LIMIT + 2 }, (_, index) => bookmark('project-a', index))
    );

    expect(loadProjectViewBookmarks(storage, 'project-a')).toHaveLength(7);
    expect(loadProjectViewBookmarks(storage, 'project-b').map(item => item.name)).toEqual(['View 1']);
  });

  it('shares the seven slots between normal and path snapshots', () => {
    const storage = new MemoryStorage();
    const mixed = [bookmark('project-a', 0), pathBookmark('project-a', 1), ...Array.from(
      { length: VIEW_BOOKMARK_LIMIT },
      (_, index) => bookmark('project-a', index + 2)
    )];
    saveProjectViewBookmarks(storage, 'project-a', mixed);

    const saved = loadProjectViewBookmarks(storage, 'project-a');
    expect(saved).toHaveLength(VIEW_BOOKMARK_LIMIT);
    expect(saved[1]).toMatchObject({
      kind: 'path',
      path: { activeNodeIds: ['finding:a', 'tactic:b'], nodeIds: ['finding:a', 'tactic:b', 'technique:c'] }
    });
  });

  it('rejects path snapshots without active nodes or a complete direct-neighbour set', () => {
    const validPath = pathBookmark('project-a', 1);
    const emptyPath = { ...validPath, id: 'empty', path: { activeNodeIds: [], nodeIds: [] } };
    const incompletePath = { ...validPath, id: 'incomplete', path: { activeNodeIds: ['missing'], nodeIds: ['other'] } };
    expect(parseViewBookmarks(JSON.stringify([validPath, emptyPath, incompletePath]))).toEqual([validPath]);
  });

  it('derives the Work finding scope from all finding nodes in a path snapshot', () => {
    expect(pathSnapshotFindingIds({
      activeNodeIds: ['category:Identity'],
      nodeIds: ['category:Identity', 'finding:a', 'finding:b', 'finding:a', 'tactic:Execution']
    })).toEqual(['a', 'b']);
  });

  it('ignores malformed local entries instead of applying partial state', () => {
    const valid = bookmark('project-a', 1);
    expect(parseViewBookmarks(JSON.stringify([{ bad: true }, valid]))).toEqual([valid]);
    expect(parseViewBookmarks('{broken')).toEqual([]);
  });

  it('restores a saved view atomically only when its sheet still exists', () => {
    const sheet = { ...makeSheet('Synthetic', [['Title'], ['One']], '', 'synthetic.csv'), id: 'sheet-a' };
    const current = {
      ...initialAppState,
      pathFindingIds: ['stale-path-record'],
      dataset: {
        fileName: 'synthetic.csv',
        fileSize: 1,
        lastModified: 1,
        format: 'csv',
        rawText: '',
        sheets: [sheet],
        profileId: 'generic',
        scanTool: 'Synthetic'
      }
    };
    const saved = {
      ...bookmark('project-a', 1).view,
      view: 'records' as const,
      search: 'one',
      statusFilter: 'all',
      facetFilters: { severity: { values: ['high', 'critical'] } },
      selectedRecordId: sheet.analysis.records[0].id
    };

    const restored = applySavedViewState(current, saved);
    expect(restored).toMatchObject(saved);
    expect(restored.pathFindingIds).toEqual([]);
    expect(restored.facetFilters).not.toBe(saved.facetFilters);
    expect(applySavedViewState(current, { ...saved, activeSheetId: 'missing' })).toBe(current);
  });
});