#pragma once

#include <algorithm>
#include <cctype>
#include <cstdlib>
#include <optional>
#include <string>

namespace XCEngine::UI::Editor::Support {

inline bool IsEnvironmentFlagEnabled(const char* envName) {
    if (envName == nullptr || envName[0] == '\0') {
        return false;
    }

    const char* value = std::getenv(envName);
    if (value == nullptr || value[0] == '\0') {
        return false;
    }

    std::string normalized = value;
    std::transform(
        normalized.begin(),
        normalized.end(),
        normalized.begin(),
        [](unsigned char character) {
            return static_cast<char>(std::tolower(character));
        });
    return normalized != "0" &&
        normalized != "false" &&
        normalized != "off" &&
        normalized != "no";
}

inline std::optional<int> TryGetEnvironmentInt(const char* envName) {
    if (envName == nullptr || envName[0] == '\0') {
        return std::nullopt;
    }

    const char* value = std::getenv(envName);
    if (value == nullptr || value[0] == '\0') {
        return std::nullopt;
    }

    char* parseEnd = nullptr;
    const long parsed = std::strtol(value, &parseEnd, 10);
    if (parseEnd == value || (parseEnd != nullptr && *parseEnd != '\0')) {
        return std::nullopt;
    }

    return static_cast<int>(parsed);
}

} // namespace XCEngine::UI::Editor::Support