import { extractValue } from '../src/lib/dataExport';
import { listExportableParams } from '../src/lib/dataExport';

const status = {
  vitals: 'ok',
  custom_fields: { 'f-weight': 250 },
  analysis_summary: { total: 12, success_rate: 0.83, counts: { Success: 10, Failure: 2 } },
};

describe('extractValue', () => {
  it('reads a builtin field via statusKey', () => {
    expect(extractValue(status, { kind: 'builtin', statusKey: 'vitals' })).toBe('ok');
  });
  it('reads a custom field via fieldId', () => {
    expect(extractValue(status, { kind: 'custom', fieldId: 'f-weight' })).toBe(250);
  });
  it('reads session-metric total', () => {
    expect(extractValue(status, { kind: 'total' })).toBe(12);
  });
  it('reads session-metric success_rate as a raw 0-1 fraction', () => {
    expect(extractValue(status, { kind: 'success_rate' })).toBe(0.83);
  });
  it('reads a dynamic count category', () => {
    expect(extractValue(status, { kind: 'category', category: 'Failure' })).toBe(2);
  });
  it('returns null when analysis_summary is absent', () => {
    expect(extractValue({ custom_fields: {} }, { kind: 'total' })).toBeNull();
    expect(extractValue({}, { kind: 'category', category: 'Success' })).toBeNull();
  });
  it('returns null for a missing custom field', () => {
    expect(extractValue({ custom_fields: {} }, { kind: 'custom', fieldId: 'nope' })).toBeNull();
    expect(extractValue({}, { kind: 'builtin', statusKey: 'notes' })).toBeNull();
  });
});

const dailyTemplate = [
  { fieldId: 'b-vitals', key: 'vitals', label: 'Vitals', builtin: true, active: true },
  { fieldId: 'c-weight', key: 'weight', label: 'Weight (g)', builtin: false, active: false },
];
const statuses = [
  { analysis_summary: { counts: { Success: 1, Failure: 0 } } },
  { analysis_summary: { counts: { Success: 2, Other: 1 } } },
  { analysis_summary: null },
];

describe('listExportableParams', () => {
  const params = listExportableParams(dailyTemplate, statuses);
  it('starts with the two fixed session metrics', () => {
    expect(params.slice(0, 2)).toEqual([
      expect.objectContaining({ id: '__total__', label: 'Total attempts', group: 'metrics', kind: 'total' }),
      expect.objectContaining({ id: '__success_rate__', label: 'Success rate', group: 'metrics', kind: 'success_rate' }),
    ]);
  });
  it('adds one metrics entry per dynamic count category, sorted', () => {
    const cats = params.filter((p) => p.kind === 'category').map((p) => p.label);
    expect(cats).toEqual(['Failure', 'Other', 'Success']);
  });
  it('includes every template field (incl. inactive) in the daily group', () => {
    const daily = params.filter((p) => p.group === 'daily');
    expect(daily).toEqual([
      expect.objectContaining({ label: 'Vitals', kind: 'builtin', statusKey: 'vitals' }),
      expect.objectContaining({ label: 'Weight (g)', kind: 'custom', fieldId: 'c-weight' }),
    ]);
  });
  it('gives every param a unique id', () => {
    const ids = params.map((p) => p.id);
    expect(new Set(ids).size).toBe(ids.length);
  });
  it('tolerates empty/missing inputs', () => {
    expect(listExportableParams(undefined, undefined).length).toBe(2); // just the two fixed metrics
  });
});