# finding merges and sorting them in ascending manner

def find_merges():


    node_class = "Merge2"
    merge_list = [i for i in nuke.selectedNodes() if i.Class() in node_class]

    merge_nodes = []



    for i in merge_list: # getting names of the merge nodes

        mergeName = i.name()
        merge_nodes.append(mergeName)

        merge_nodes.sort()




    return merge_nodes

print find_merges()

# Building crops
def deploy_crops():


    # Getting root formats


    f = nuke.root().format()
    rootWidth = int(f.width())
    rootHeight = int(f.height())


    if len(find_merges())== 0 :
        nuke.message("No nodes selected")

    elif len(find_merges())>0 :

        p = nuke.Panel('Crops format')
        p.addSingleLineInput('Width', rootWidth)
        p.addSingleLineInput('Height', rootHeight)

        ret = p.show()

        width_input =  int(p.value('Width'))
        height_input = int(p.value('Height'))




        cropCount = 0

        for n in find_merges():

            node = nuke.toNode(n)

            nuke.selectAll()
            nuke.invertSelection()

            node.setSelected(True)# selecting the node to insert the crop



            boxWidth = int(nuke.value(n+ ".bbox.w"))
            boxHeight =int(nuke.value(n+ ".bbox.h"))

            print boxWidth, boxHeight


            if boxWidth > width_input or boxHeight > height_input :
                cropNode = nuke.createNode('Crop')
                cropNode['box'].setValue((0, 0, width_input, height_input))
                cropNode.knob('reformat').setValue(True)
                cropCount = cropCount+1
                nuke.selectAll()
                nuke.invertSelection()


            else:


                pass


        nuke.message("%s crops deployed." % (cropCount))



deploy_crops()