import 'package:flutter_test/flutter_test.dart';

import 'package:miler/data/geofence.dart';

/// ─────────────────────────────────────────────────────────────────────────
/// THE SWITCH, AND THE FOUR SHAPES THAT MUST NOT COME BACK
///
/// This file used to assert the opposite of what it asserts now, and that is
/// the point of keeping it rather than deleting it.
///
/// It read:
///
///     expect(kGeofenceEnforced, isFalse);   // "recorded decision", 2026-08-25
///     expect(kGeofenceRadiusMeters, 10);
///
/// So the test suite was **enforcing the release blocker**: a developer who
/// turned the fence on to fix it would be met with a red test telling him the
/// off state was deliberate. Between them those two lines meant every shipped
/// build let a rider mark a stop picked up from anywhere on earth, and the
/// suite agreed that was correct.
///
/// Reversed 2026-09-16 as part of the Play Store release audit. The fence now
/// lives in `lib/data/geofence.dart` and the behaviour is exercised properly in
/// `geofence_test.dart` — 41 cases, the full distance table, every failure
/// mode, and an HTTP client that fails the test if a blocked rung posts
/// anything.
///
/// What is left here is the short list of *specific past mistakes*, each of
/// which shipped, so that none of them can return quietly.
/// ─────────────────────────────────────────────────────────────────────────
void main() {
  test('MISTAKE 1 — the fence must not default to off', () {
    // `bool.fromEnvironment('ENFORCE_GEOFENCE', defaultValue: false)`. Every
    // `flutter build appbundle --release` passes no dart-define, so the default
    // *is* the shipped behaviour. It had been `kDebugMode` before that — off in
    // exactly the builds anyone tested with — and a hard `false` before that.
    // Three spellings, one effect.
    expect(
      kGeofenceEnforced,
      isTrue,
      reason:
          'The release build must enforce proximity. If this run passed '
          '--dart-define=ENFORCE_GEOFENCE=false, this failure is correct.',
    );
  });

  test('MISTAKE 2 — the radius must not be smaller than the GPS', () {
    // 10 m is at or inside the error radius of consumer GPS, so the fence
    // stopped measuring proximity and started measuring whether the satellites
    // were kind. It refused riders standing at doors, which is what got the
    // whole control switched off twice.
    expect(kGeofenceRadiusMetres, 100);
    expect(
      kGeofenceRadiusMetres,
      greaterThan(kGeofenceMaxAccuracyMetres),
      reason: 'a fence smaller than the fix that measures it cannot be met',
    );
  });

  test('MISTAKE 3 — there must be exactly one radius', () {
    // The app once held three at the same time: a per-tenant `pickupradius`
    // from prefs defaulting to 100, a hardcoded 500 in Home's bulk gate, and 10
    // in the controller. Which fence a rider met depended on whether he ticked
    // boxes on Home or slid the sheet on a stop.
    //
    // Both gates call `Geofence.check` now and neither holds arithmetic, so
    // this asserts the constant is the only knob there is to turn.
    expect(kGeofenceRadiusMetres, isA<double>());
    expect(kGeofenceRadiusMetres, greaterThan(0));
  });

  test('MISTAKE 4 — a cached fix must have a shelf life', () {
    // A last-known position is instant, free, and can be an hour old. On a
    // round it is reliably the *previous* stop, which is how a rider marks a
    // delivery arrived from the last street he was on.
    expect(kGeofenceFixMaxAge, const Duration(seconds: 30));
  });

  test('the fence still has a way to be switched off in an emergency', () {
    // Deliberately kept, and deliberately not the default. If the fence starts
    // refusing real work at real doors, `--dart-define=ENFORCE_GEOFENCE=false`
    // gets the fleet moving inside one release rather than one sprint — and
    // every bypassed check logs in every build mode, so a build's own log says
    // which way it was compiled.
    //
    // Raise `kGeofenceRadiusMetres` before reaching for it.
    expect(
      const bool.fromEnvironment('ENFORCE_GEOFENCE', defaultValue: true),
      kGeofenceEnforced,
    );
  });
}