/**
 * @file test_config.cpp
 * @brief Tests for configuration loading.
 */

#include <gtest/gtest.h>
#include "core/config.hpp"
#include <cstdlib>

using namespace app::core;

class ConfigTest : public ::testing::Test {
protected:
    void TearDown() override {
        // Clean up environment
        unsetenv("APP_NAME");
        unsetenv("PORT");
        unsetenv("DEBUG");
    }
};

TEST_F(ConfigTest, DefaultValues) {
    auto result = Config::from_env();
    ASSERT_TRUE(result.has_value());
    EXPECT_EQ(result->app_name, "MyApp");
    EXPECT_EQ(result->port, 8080);
    EXPECT_FALSE(result->debug);
}

TEST_F(ConfigTest, FromEnvironment) {
    setenv("APP_NAME", "TestApp", 1);
    setenv("PORT", "3000", 1);
    setenv("DEBUG", "true", 1);

    auto result = Config::from_env();
    ASSERT_TRUE(result.has_value());
    EXPECT_EQ(result->app_name, "TestApp");
    EXPECT_EQ(result->port, 3000);
    EXPECT_TRUE(result->debug);
}

TEST_F(ConfigTest, InvalidPort) {
    setenv("PORT", "not_a_number", 1);

    auto result = Config::from_env();
    EXPECT_FALSE(result.has_value());
}