#pragma once
#include "util.h"

enum class kShaderUniform : uint16_t
{
    MVP = const_hash("mvp"),
    Tex = const_hash("tex"),
    Col = const_hash("col"),
    Tof = const_hash("texoff"),
    Tsz = const_hash("texsz"),
};

class Shader
{
    std::map<kShaderUniform, GLuint> m_umap;
    GLuint prog;
public:
    bool create(const char* vertex, const char* fragment);
    void use();
    void u_vec4(kShaderUniform id, const glm::vec4& v);
    void u_vec2(kShaderUniform id, const glm::vec2& v);
    void u_mat4(kShaderUniform id, const glm::mat4& m);
    void u_int(kShaderUniform id, int i);
};

enum class kShader : uint16_t
{
    Color       = const_hash("color"),
    Texture     = const_hash("texture"),
    UVs         = const_hash("uvs"),
    Font        = const_hash("font"),
};

class ShaderManager
{
    static std::map<kShader, Shader> m_shaders;
    static Shader* m_current;
public:
    static bool create(kShader id, const char* vertex, const char* fragment);
    static void use(kShader id);
    static void use(const char* name);
    static void u_vec4(kShaderUniform id, const glm::vec4& v);
    static void u_vec2(kShaderUniform id, const glm::vec2& v);
    static void u_mat4(kShaderUniform id, const glm::mat4& m);
    static void u_int(kShaderUniform id, int i);
};