#version 330

out vec4 outputColor;

uniform sampler2D texture0;
uniform sampler2D texture1;

uniform vec3 viewPos;
uniform vec3 lightPos;
uniform vec3 lightColor;

in vec4 Color;
in vec4 FarColor;
in vec3 Normal;
in vec3 FragPos;
in vec2 TexCoord;
in vec4 TexType;
in float RealType;

void main()
{
    vec4 color0 = texture(texture0, TexCoord);
    vec4 color1 = texture(texture1, TexCoord);

    vec3 norm = normalize(Normal);

    float inclineFactor = abs(norm.y);

    vec4 finalColor = mix(color0, color1, norm.y);

    vec3 lightDir = normalize(lightPos - FragPos);
    float diff = max(dot(norm, lightDir), 0.0);
    vec3 diffuse = diff * lightColor;

    vec4 litColor = vec4(diffuse, 1.0) * finalColor * Color;

    float distance = length(viewPos - FragPos);
    float interpolationFactor = clamp(distance / 1000.0, 0.0, 1.0);
    outputColor = mix(litColor, FarColor, interpolationFactor);
}