#include "SceneViewPanel.h"
#include <imgui.h>
#include <imgui_internal.h>

namespace UI {

SceneViewPanel::SceneViewPanel() : Panel("Scene") {}

void SceneViewPanel::Render() {
    ImGui::Begin(m_name.c_str(), nullptr, ImGuiWindowFlags_None);
    
    ImVec2 canvasSize = ImGui::GetContentRegionAvail();
    ImDrawList* drawList = ImGui::GetWindowDrawList();
    ImVec2 canvasPos = ImGui::GetCursorScreenPos();
    
    ImU32 bgColor = IM_COL32(30, 30, 30, 255);
    drawList->AddRectFilled(canvasPos, ImVec2(canvasPos.x + canvasSize.x, canvasPos.y + canvasSize.y), bgColor);
    
    RenderGrid();
    
    ImGui::End();
}

void SceneViewPanel::RenderGrid() {
    ImDrawList* drawList = ImGui::GetWindowDrawList();
    ImVec2 canvasPos = ImGui::GetCursorScreenPos();
    ImVec2 canvasSize = ImGui::GetContentRegionAvail();
    
    float gridSize = 50.0f;
    ImU32 gridColor = IM_COL32(50, 50, 50, 255);
    
    for (float x = fmodf(0, gridSize); x < canvasSize.x; x += gridSize) {
        drawList->AddLine(
            ImVec2(canvasPos.x + x, canvasPos.y),
            ImVec2(canvasPos.x + x, canvasPos.y + canvasSize.y),
            gridColor
        );
    }
    
    for (float y = fmodf(0, gridSize); y < canvasSize.y; y += gridSize) {
        drawList->AddLine(
            ImVec2(canvasPos.x, canvasPos.y + y),
            ImVec2(canvasPos.x + canvasSize.x, canvasPos.y + y),
            gridColor
        );
    }
    
    const char* label = "Scene View";
    ImVec2 labelSize = ImGui::CalcTextSize(label);
    ImVec2 labelPos(canvasPos.x + 10, canvasPos.y + 10);
    drawList->AddText(labelPos, IM_COL32(100, 100, 100, 255), label);
}

}