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

import {
  createShareUrl,
  normaliseShareState,
  parseShareState,
  serializeShareState,
  type ShareViewState,
} from './shareState';

describe('shareState', () => {
  it('serializes viewer state deterministically', () => {
    const state: ShareViewState = {
      machineId: 'v8-engine',
      camera: {
        position: [1.23456, -2, 3],
        preset: 'isometric',
      },
      explode: 1.5,
      hiddenParts: ['valve', 'piston', 'piston'],
      partOpacity: {
        z: 0.33333,
        a: 2,
        'bad id': 0.5,
      },
      selectedPartId: 'crankshaft',
      labels: true,
      wireframe: true,
      crossSection: {
        enabled: true,
        axis: 'x',
        offset: 0.25,
      },
    };

    expect(serializeShareState(state)).toBe(
      'clip=x%3A0.25&cp=1.2346%2C-2%2C3&ex=1.5&hide=piston%2Cvalve&labels=1&m=v8-engine&op=a%3A1%2Cz%3A0.333&part=crankshaft&preset=isometric&wire=1',
    );
  });

  it('parses a serialized state back to its normalised representation', () => {
    const query =
      'clip=x%3A0.25&cp=1.2346%2C-2%2C3&ex=1.5&hide=piston%2Cvalve&labels=1&m=v8-engine&op=a%3A1%2Cz%3A0.333&part=crankshaft&preset=isometric&wire=1';

    expect(parseShareState(query)).toEqual({
      machineId: 'v8-engine',
      camera: {
        position: [1.2346, -2, 3],
        preset: 'isometric',
      },
      explode: 1.5,
      hiddenParts: ['piston', 'valve'],
      partOpacity: {
        a: 1,
        z: 0.333,
      },
      selectedPartId: 'crankshaft',
      labels: true,
      wireframe: true,
      crossSection: {
        enabled: true,
        axis: 'x',
        offset: 0.25,
      },
    });
  });

  it('clamps unsafe numbers and removes invalid identifiers', () => {
    expect(
      normaliseShareState({
        machineId: 'bad id',
        explode: 999,
        camera: {
          zoom: -1,
          target: [Infinity, 0, 0],
        },
        visibleParts: ['valid-part', '../bad'],
        animation: {
          rpm: 100_000,
          timeScale: 12,
          step: -2,
        },
      }),
    ).toEqual({
      explode: 10,
      visibleParts: ['valid-part'],
      animation: {
        rpm: 50000,
        timeScale: 3,
        step: 0,
      },
    });
  });

  it('creates canonical share URLs without preserving stale state parameters by default', () => {
    const url = createShareUrl(
      {
        machineId: 'gear-pump',
        explode: 0.25,
      },
      {
        baseUrl: 'https://mechanica.example/viewer?old=1&m=stale#parts',
      },
    );

    expect(url).toBe('https://mechanica.example/viewer?ex=0.25&m=gear-pump#parts');
  });

  it('can preserve unrelated query parameters while replacing share state keys', () => {
    const url = createShareUrl(
      {
        machineId: 'worm-gear-drive',
      },
      {
        baseUrl: 'https://mechanica.example/viewer?utm=campaign&m=stale',
        preserveExistingParams: true,
      },
    );

    expect(url).toBe('https://mechanica.example/viewer?m=worm-gear-drive&utm=campaign');
  });
});