#pragma once
#include "pch.h"
#include "Shader.h"

struct ShaderMng
{
    std::string mDir = "resource/shader/";
    std::string versionHeader = " #version 300 es \n"
                                "precision mediump float;\n";
    std::string mediumHeader = " precision mediump float; \n";

    const std::string GetVersionHeader() const
    {
        return this->versionHeader;
    };
    const std::string GetMediumHeader() const
    {
        return this->mediumHeader;

    }
    Shader CreatePath(const std::string &v, const std::string &p)
    {
        const std::string vf = mDir + v;
        const std::string pf = mDir + p;

        Shader shader;

        shader.CreateFromFilePath(vf, pf);
        const std::string vertCode = this->GetContexText(vf);
        const std::string fragCode = this->GetContexText(pf);

        // const std::string vvCode = GetVersionHeader() + vertCode;
        // const std::string ffCode = GetVersionHeader() + fragCode;
        const std::string vvCode = vertCode;
        const std::string ffCode = fragCode;


        shader.CreateFromCode(vvCode.c_str(), ffCode.c_str());

        return shader;
    }
    
    const std::string GetContexText(const std::string& path) const
    {
        std::ifstream ifs;
        ifs.open(path);
        if (!ifs.is_open())
        {
            LOGI("cannot open file %s \n", path.c_str());
            ifs.close();
            return "";
        }

        std::string text = std::string((std::istreambuf_iterator<char>(ifs)),
                                       (std::istreambuf_iterator<char>()));

        ifs.close();

        return text;
    }
};