#version 330

out vec4 outputColor;

uniform vec3 viewPos;
uniform vec3 lightPos;
uniform vec3 lightColor;
uniform sampler2DArray texture0;

in vec4 FarColor;
in vec3 Normal;
in vec3 FragPos;
in vec2 TexCoord;
in vec4 TexType;

void main()
{
    vec4 blendedColor[4];
    for (int i = 0; i < 4; i++) {
        float type = TexType[i];
        blendedColor[i] = texture(texture0, vec3(TexCoord, type));
    }

    float weightX = TexCoord.x;
    float weightY = TexCoord.y;

    vec4 mix1 = mix(blendedColor[0], blendedColor[2], weightX);
    vec4 mix2 = mix(blendedColor[1], blendedColor[3], weightX);
    vec4 finalColor = mix(mix1, mix2, weightY);

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

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

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