#include "ui/Layout.hpp"

#include <algorithm>

namespace tahgibu {
namespace {

constexpr float kMenuBarHeight = 26.0f;
constexpr float kToolBarHeight = 40.0f;
constexpr float kPropertiesWidth = 280.0f;
constexpr float kTimelineHeight = 200.0f;
constexpr float kMinCanvasWidth = 400.0f;
constexpr float kMinCanvasHeight = 200.0f;

}  // namespace

Layout Layout::compute(int windowWidth, int windowHeight) {
    const float w = static_cast<float>(windowWidth);
    const float h = static_cast<float>(windowHeight);
    const float top = kMenuBarHeight + kToolBarHeight;

    const float timelineH = std::min(kTimelineHeight, std::max(0.0f, h - top - kMinCanvasHeight));
    const float propertiesW = std::min(kPropertiesWidth, std::max(0.0f, w - kMinCanvasWidth));
    const float middleH = std::max(0.0f, h - top - timelineH);

    Layout layout;
    layout.menuBar = {0.0f, 0.0f, w, kMenuBarHeight};
    layout.toolBar = {0.0f, kMenuBarHeight, w, kToolBarHeight};
    layout.canvas = {0.0f, top, w - propertiesW, middleH};
    layout.properties = {w - propertiesW, top, propertiesW, middleH};
    layout.timeline = {0.0f, top + middleH, w, timelineH};
    return layout;
}

}  // namespace tahgibu