import maya.cmds as cmds

mtlMayaList = cmds.ls(sl=1)
mayaShaders =["phong", "blinn", "lambert"]

for mtlMaya in mtlMayaList:
    if (cmds.objectType(mtlMaya) in mayaShaders) and (mtlMaya not in ["lambert1","shaderGlow1", "particleCloud1"]):
        inputFile = cmds.listConnections(mtlMaya + ".color", d=1)[0]
        pathFile = cmds.getAttr(inputFile + ".fileTextureName")
        texDiffuse = pathFile.split("/")[-1].split(".")[0]
        mtl = texDiffuse + "_Mtl"
        remapSpec = "remapSpec_" + texDiffuse
        remapGloss = "remapGloss_" + texDiffuse
        remapMetal01 = "remapMetal01_" + texDiffuse
        remapMetal02 = "remapMetal02_" + texDiffuse
        remapList = [remapSpec, remapGloss, remapMetal01]
        if cmds.objExists(mtl)==False:
            cmds.shadingNode("RedshiftMaterial",n=mtl,asShader=1)
            for remap in remapList:
                cmds.shadingNode("remapHsv",n=remap,asUtility=1)
                cmds.connectAttr(inputFile + ".outColor", remap + ".color")
            cmds.shadingNode("remapHsv",n=remapMetal02,asUtility=1)
            cmds.connectAttr(remapMetal01 + ".outColor.outColorR", remapMetal02 + ".color.colorR")
            cmds.connectAttr(remapMetal01 + ".outColor.outColorR", remapMetal02 + ".color.colorG")
            cmds.connectAttr(remapMetal01 + ".outColor.outColorR", remapMetal02 + ".color.colorB")
            cmds.connectAttr(remapSpec + ".outColor", mtl + ".refl_color")
            cmds.connectAttr(remapGloss + ".outColor.outColorR", mtl + ".refl_roughness")
            cmds.connectAttr(remapMetal02 + ".outColor.outColorR", mtl + ".refl_metalness")
            cmds.connectAttr(inputFile + ".outColor", mtl + ".diffuse_color")
            cmds.setAttr(mtl + ".refl_weight", 0)
            cmds.setAttr(mtl + ".refl_samples", 128)
            cmds.setAttr(mtl + ".refl_ior", 1.4)
        else:
            print mtl + " already exists. Reusing it."
        cmds.select(mtlMaya)
        cmds.hyperShade(mtlMaya, objects="")
        cmds.hyperShade(assign=mtl)
        cmds.delete(mtlMaya)
    else:
        print "Script is not set up for " + mtlMaya + "'s shader-type. Skipping."
cmds.select(cl=1)