#version 430 compatibility 


in vec3 fragPos;
in vec3 interpNormal;

uniform vec3 cameraPos;
uniform samplerCube bubble;
uniform vec3 lightPos;

layout (binding = 0) uniform samplerCube tex_map;

void main()
{   
    float ratio = 1.33 / 1.00;
    vec3 I = normalize(fragPos - cameraPos);
    vec3 Refract = refract(I, normalize(interpNormal), ratio);
    vec3 Reflect = reflect(I, normalize(interpNormal));
    vec3 flip = reflect(normalize(-fragPos), normalize(interpNormal));
    vec4 flipColor = texture( tex_map, flip );
    vec4 refractionColor = texture(tex_map, Refract);
    vec4 reflectionColor = texture(tex_map, Reflect);
    //vec4 color = vec4(mix(flipColor,reflectionColor,0).rgb,1.0);

    vec4 envColor = vec4(mix( flipColor,refractionColor,0).rgb,0.5);

    vec3 lightDir = normalize(lightPos-fragPos);
	vec3 V = normalize(cameraPos-fragPos);
    vec3 normal = normalize(interpNormal);
    float diffuse = max(0,dot(normal,normalize(lightDir)));
	vec3 R = reflect(-normalize(lightDir),normal);
	float ambient = 0.5;
	float specular = pow(max(0,dot(R,V)),10);
    gl_FragColor = (envColor*(ambient + (1-ambient)*diffuse)+vec4(1)*specular*0.2);

   
}