#version 430 core

layout (location = 0) out vec4 FragColor;
layout (location = 1) out vec4 BrightColor;

struct PointLight {
	vec3 position;
	vec3 color;
	float intensity;
};

#define MAX_POINT_LIGHTS 16

uniform vec3 cameraPos;
uniform sampler2D diffuseTexture;
uniform sampler2D normalTexture;
uniform PointLight pointLights[MAX_POINT_LIGHTS];
uniform int LightsCount;

in vec3 fragPos;
in vec2 vTexCoord;
in vec3 LightPosTS[MAX_POINT_LIGHTS];
in vec3 CameraPosTS;
in vec3 FragPosTS;



void main()
{
	vec3 fragColor = vec3(0,0,0);
	vec3 texture = texture2D(diffuseTexture, vTexCoord).rgb;
	//vec3 texture = vec3(textureColor.x, textureColor.y, textureColor.z);
	vec3 ambient = vec3(0.1, 0.1, 0.1) * texture;

    vec3 normal = texture2D(normalTexture, vTexCoord).rgb;
    normal = normalize(normal * 2.0 - 1.0);

	vec3 V = normalize(CameraPosTS-FragPosTS);

	for(int i = 0; i < LightsCount; i++)
	{
		vec3 lightDir = normalize(LightPosTS[i] - FragPosTS);
	

		vec3 R = reflect(-lightDir,normal);

		float dist = distance(fragPos, pointLights[i].position);
		float distance = (1/dist) * (1/dist);
	
		float spec = pow(max(0,dot(R,V)),2);
		float diff = max(0,dot(normal,normalize(lightDir)));

		vec3 diffuse = pointLights[i].color * diff * distance * pointLights[i].intensity;
		vec3 specular = spec * pointLights[i].color * (pointLights[i].intensity/dist);


		fragColor += texture*(diffuse+specular);
	}

    BrightColor = vec4(0.0, 0.0, 0.0, 1.0);
	FragColor = vec4(fragColor+ambient,1.0);
}