import { asUint16, expectType, Result } from 'ts-data-forge';
import { type Uint16 } from 'ts-type-forge';
import { type TypeOf } from '../../../type.mjs';
import { validationErrorsToMessages } from '../../../utils/index.mjs';
import { uint16 } from './uint16.mjs';

describe(uint16, () => {
  const targetType = uint16(asUint16(0));

  type TargetType = TypeOf<typeof targetType>;

  expectType<TargetType, Uint16>('=');

  expectType<typeof targetType.defaultValue, TargetType>('=');

  describe('is', () => {
    test('truthy case', () => {
      const x: unknown = 30_000;

      const isTarget = targetType.is(x);

      if (isTarget) {
        expectType<typeof x, TargetType>('=');
      } else {
        expectType<typeof x, unknown>('=');
      }

      assert.isTrue(isTarget);
    });

    test('truthy case - zero', () => {
      const x: unknown = 0;

      assert.isTrue(targetType.is(x));
    });

    test('falsy case - negative', () => {
      const x: unknown = -1;

      const isTarget = targetType.is(x);

      if (isTarget) {
        expectType<typeof x, TargetType>('=');
      } else {
        expectType<typeof x, unknown>('=');
      }

      assert.isFalse(isTarget);
    });

    test('falsy case - too large', () => {
      const x: unknown = 70_000;

      assert.isFalse(targetType.is(x));
    });

    test('falsy case - float', () => {
      const x: unknown = 123.456;

      assert.isFalse(targetType.is(x));
    });
  });

  describe('validate', () => {
    test('truthy case', () => {
      const result = targetType.validate(50_000);

      assert.isTrue(Result.isOk(result));

      const resultValue = Result.unwrapThrow(result);

      expect(resultValue).toBe(50_000);
    });

    test('validate returns input as-is for OK cases', () => {
      const input = 30_000;

      const result = targetType.validate(input);

      assert.isTrue(Result.isOk(result));

      const resultValue1 = Result.unwrapThrow(result);

      expect(resultValue1).toBe(input); // ✅ same reference
    });

    test('falsy case - negative', () => {
      const result = targetType.validate(-5);

      assert.isTrue(Result.isErr(result));

      const resultError = Result.unwrapErrThrow(result);

      assert.deepStrictEqual(resultError, [
        {
          path: [],
          actualValue: -5,
          expectedType: 'Uint16',
          typeName: 'Uint16',
          details: undefined,
        },
      ]);

      assert.deepStrictEqual(validationErrorsToMessages(resultError), [
        'Error: expected <Uint16> type but <number> type value `-5` was passed.',
      ]);
    });
  });

  describe('cast', () => {
    test('truthy case', () => {
      const x: unknown = 40_000;

      expect(targetType.cast(x)).toBe(40_000);
    });

    test('falsy case', () => {
      const x: unknown = 'invalid';

      expect(() => targetType.cast(x)).toThrow('Error');
    });
  });

  describe('fill', () => {
    test('noop', () => {
      const x: unknown = 25_000;

      expect(targetType.fill(x)).toBe(25_000);
    });

    test('fill with the default value', () => {
      const x: unknown = 'not a uint16';

      expect(targetType.fill(x)).toBe(0);
    });
  });
});