#version 330 core

in vec3 Normal;
in vec3 FragPos;

out vec4 FragColor;

void main()
{
    vec3 objectColor = vec3(1.0, 1.0, 1.0);
    vec3 result;

    // Ambient lighting
    vec3 ambientLightColor = vec3(1.0, 1.0, 1.0);
    float ambientStrength = 0.0;
    vec3 ambient = ambientStrength * ambientLightColor;

    // Directional lighting
    vec3 dirColorHi = vec3(.39, .40, .21) * 2.0;
    vec3 dirColorLo = vec3(.45, .22, .33) * 2.0;
    vec3 lightPos = vec3(10.0, 7.0, -8.0);
    vec3 normal = normalize(Normal);
    vec3 lightDir = normalize(lightPos - FragPos);
    float diff = dot(normal, lightDir) * .5 + .5;
    vec3 diffuse = mix(dirColorLo, dirColorHi, diff);

    result = (ambient + diffuse) * objectColor;

    FragColor = vec4(result, 1.0);
}