<?php

declare(strict_types=1);

use App\Framework\Process\ValueObjects\EnvironmentVariables;

describe('EnvironmentVariables Value Object', function () {
    it('can be created empty', function () {
        $env = EnvironmentVariables::empty();

        expect($env->isEmpty())->toBeTrue()
            ->and($env->toArray())->toBe([]);
    });

    it('can be created from array', function () {
        $env = EnvironmentVariables::fromArray([
            'FOO' => 'bar',
            'BAZ' => 'qux',
        ]);

        expect($env->isEmpty())->toBeFalse()
            ->and($env->has('FOO'))->toBeTrue()
            ->and($env->get('FOO'))->toBe('bar')
            ->and($env->get('BAZ'))->toBe('qux');
    });

    it('can merge variables', function () {
        $env1 = EnvironmentVariables::fromArray(['FOO' => 'bar']);
        $env2 = $env1->merge(['BAZ' => 'qux']);

        expect($env2->has('FOO'))->toBeTrue()
            ->and($env2->has('BAZ'))->toBeTrue()
            ->and($env2->toArray())->toBe([
                'FOO' => 'bar',
                'BAZ' => 'qux',
            ]);
    });

    it('can add single variable', function () {
        $env1 = EnvironmentVariables::empty();
        $env2 = $env1->with('FOO', 'bar');

        expect($env2->has('FOO'))->toBeTrue()
            ->and($env2->get('FOO'))->toBe('bar');
    });

    it('can remove variable', function () {
        $env1 = EnvironmentVariables::fromArray(['FOO' => 'bar', 'BAZ' => 'qux']);
        $env2 = $env1->without('FOO');

        expect($env2->has('FOO'))->toBeFalse()
            ->and($env2->has('BAZ'))->toBeTrue();
    });

    it('returns default for missing variable', function () {
        $env = EnvironmentVariables::empty();

        expect($env->get('MISSING', 'default'))->toBe('default')
            ->and($env->get('MISSING'))->toBeNull();
    });

    it('preserves immutability', function () {
        $env1 = EnvironmentVariables::fromArray(['FOO' => 'bar']);
        $env2 = $env1->with('BAZ', 'qux');

        expect($env1->has('BAZ'))->toBeFalse()
            ->and($env2->has('BAZ'))->toBeTrue();
    });
});