#include <imgui.h>
#include "resources.hpp"
#include <cstdio>
#include <cstring>

namespace ougge::resources {

// select all glyphs from font
static const ImWchar glyph_ranges[] = {
    0x0020, 0xFFFF, 0
};

ImFont* ImFont_LoadFromFile(const std::string& file_path, f32 font_size, f32 dpi){
    ImGuiIO& io = ImGui::GetIO();
    font_size *= dpi;
    return io.Fonts->AddFontFromFileTTF(file_path.c_str(), font_size, nullptr, glyph_ranges);
}

ImFont* ImFont_LoadFromResource(const std::string& font_name, f32 font_size, f32 dpi){
    ImGuiIO& io = ImGui::GetIO();
    font_size *= dpi;
    ImFontConfig font_cfg = ImFontConfig();
    std::sprintf(font_cfg.Name, "%s %ipx", font_name.c_str(), (i32)font_size);
    
    auto& res = getResource("fonts/" + font_name + ".ttf");
    char* font_data = new char[res.size]; 
    res.openStream()->read(font_data, res.size);

    return io.Fonts->AddFontFromMemoryTTF((void*)(font_data), res.size,
        font_size, &font_cfg, glyph_ranges);
}

}