import sd
from sd.api import sdproperty, sdnode, sdbasetypes, sdvaluefloat4

app = sd.getContext().getSDApplication()
ui_mgr = app.getQtForPythonUIMgr()
graph = ui_mgr.getCurrentGraph()

# Create Uniform Color node
node_uniform = graph.newNode("sbs::compositing::uniform")
node_uniform.setPosition(sdbasetypes.float2(0, 0))

# Set value for Uniform Color's Output color property
node_uniform.setPropertyValue(
  node_uniform.getPropertyFromId(
    "outputcolor",
    sdproperty.SDPropertyCategory.Input
    ),
  sdvaluefloat4.SDValueFloat4.sNew(sdbasetypes.float4(1, 0.5, 0, 1))
  )

# Create Levels node
node_levels = graph.newNode("sbs::compositing::levels")
node_levels.setPosition(sdbasetypes.float2(150, 0))

# Set values for Levels' Level Out properties
# This should result in the input image being inverted
node_levels.setPropertyValue(
  node_levels.getPropertyFromId(
    "leveloutlow",
    sdproperty.SDPropertyCategory.Input
    ),
  sdvaluefloat4.SDValueFloat4.sNew(sdbasetypes.float4(1, 1, 1, 0))  
  )
node_levels.setPropertyValue(
  node_levels.getPropertyFromId(
    "levelouthigh",
    sdproperty.SDPropertyCategory.Input
    ),
  sdvaluefloat4.SDValueFloat4.sNew(sdbasetypes.float4(0, 0, 0, 1))  
  )

# Get Uniform color output property
node_uniform_output = node_uniform.getPropertyFromId(
  "unique_filter_output",
  sdproperty.SDPropertyCategory.Output
  )

# Get Levels input property
node_levels_input = node_levels.getPropertyFromId(
  "input1",
  sdproperty.SDPropertyCategory.Input
  )

# Connect Uniform color output to Levels input
node_uniform.newPropertyConnection(
  node_uniform_output,
  node_levels,
  node_levels_input
  )