#include <doctest/doctest.h>

#include "fgc/Config.h"

#include <cmath>
#include <cstdlib>

using namespace fgc;

TEST_CASE("ConfigLoader maps and defaults typed values") {
    unsetenv("FGC_MQTT_USER");
    unsetenv("FGC_MQTT_PW");

    std::map<std::string, std::string> kv = {
        {"General.tower_name", "Staeffelsberg"},
        {"General.image_interval", "3"},
        {"General.debug", "1"},
        {"Network.zkms_server_ip", "10.0.0.5"},
        {"Network.mqtt_user", "fileuser"},
        {"Camera.id_Cam1", "DEV_1"},
        {"Camera.id_Cam3", "DEV_3"},
        {"Features.enable_mqtt", "false"},
    };
    AppConfig c = ConfigLoader::fromMap(kv);

    CHECK(c.general.tower_name == "Staeffelsberg");
    CHECK(c.general.image_interval == 3);
    CHECK(c.general.debug == true);
    CHECK(c.network.broker_ip == "10.0.0.5");
    CHECK(c.network.mqtt_user == "fileuser");
    CHECK(c.camera.ids.size() == 2);          // blank id_Cam2 skipped
    CHECK(c.camera.ids[1] == "DEV_3");
    CHECK(c.features.enable_mqtt == false);
    CHECK(!c.paths.output_dir.empty());        // defaulted
    CHECK(std::abs(c.image_rate() - 1.0 / 3.0) < 1e-9);
}

TEST_CASE("environment overrides file credentials") {
    setenv("FGC_MQTT_USER", "envuser", 1);
    AppConfig c = ConfigLoader::fromMap({{"Network.mqtt_user", "fileuser"}});
    CHECK(c.network.mqtt_user == "envuser");
    unsetenv("FGC_MQTT_USER");
}

TEST_CASE("ConfigLoader validates input") {
    CHECK_THROWS(ConfigLoader::fromMap({{"General.image_interval", "0"}}));
    CHECK_THROWS(ConfigLoader::fromMap({{"General.image_interval", "abc"}}));
    CHECK_THROWS(ConfigLoader::fromMap({{"General.debug", "maybe"}}));
}