#include "Components/LightComponent.h"

#include <algorithm>
#include <sstream>

namespace XCEngine {
namespace Components {

void LightComponent::SetIntensity(float value) {
    m_intensity = std::max(0.0f, value);
}

void LightComponent::SetRange(float value) {
    m_range = std::max(0.001f, value);
}

void LightComponent::SetSpotAngle(float value) {
    m_spotAngle = std::clamp(value, 1.0f, 179.0f);
}

void LightComponent::Serialize(std::ostream& os) const {
    os << "type=" << static_cast<int>(m_lightType) << ";";
    os << "color=" << m_color.r << "," << m_color.g << "," << m_color.b << "," << m_color.a << ";";
    os << "intensity=" << m_intensity << ";";
    os << "range=" << m_range << ";";
    os << "spotAngle=" << m_spotAngle << ";";
    os << "shadows=" << (m_castsShadows ? 1 : 0) << ";";
}

void LightComponent::Deserialize(std::istream& is) {
    std::string token;
    while (std::getline(is, token, ';')) {
        if (token.empty()) {
            continue;
        }

        const size_t eqPos = token.find('=');
        if (eqPos == std::string::npos) {
            continue;
        }

        const std::string key = token.substr(0, eqPos);
        std::string value = token.substr(eqPos + 1);

        if (key == "type") {
            m_lightType = static_cast<LightType>(std::stoi(value));
        } else if (key == "color") {
            std::replace(value.begin(), value.end(), ',', ' ');
            std::istringstream ss(value);
            ss >> m_color.r >> m_color.g >> m_color.b >> m_color.a;
        } else if (key == "intensity") {
            SetIntensity(std::stof(value));
        } else if (key == "range") {
            SetRange(std::stof(value));
        } else if (key == "spotAngle") {
            SetSpotAngle(std::stof(value));
        } else if (key == "shadows") {
            m_castsShadows = (std::stoi(value) != 0);
        }
    }
}

} // namespace Components
} // namespace XCEngine