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from copy import deepcopy

from .Activation import ActivationType
from .KernelWriterBase import KernelWriterBase

class KernelWriterActivationEnumHeader(KernelWriterBase):

  def __init__(self, state):
    super().__init__()
    self.state["ProblemType"] = deepcopy(state["ProblemType"])

    self.actGradientPrefix = ""
    self.actExportType = ActivationType.Export.NORMAL
    if self.state["ProblemType"]["Gradient"]:
      self.actGradientPrefix = "Gradient"
      self.actExportType = ActivationType.Export.GRADONLY

    # derive parameter
    self.language = "HIP"
    self.kernelName = self.getKernelName()

  def keys(self):
    return self.getKernelName()

  @staticmethod
  def kernelName(solution):
    state = solution._state if hasattr(solution, "_state") else solution.state
    s = "Gradient" if state["ProblemType"]["Gradient"] else ""
    return "Tensile%sActivationEnum_%s"%(s,
                                         state["ProblemType"]["ActivationComputeDataType"].toChar())

  def getKernelName(self):
    return KernelWriterActivationEnumHeader.kernelName(self)



  def getSourceFileString(self):
    fileString = "// This is a dummy file."
    return (0, fileString)

  def getHeaderFileString(self):
    fileString = "" # CHeader
    activationCDataType = self.state["ProblemType"]["ActivationComputeDataType"]
    supportedBy = ActivationType.SupportedBy.ALL if self.state["ProblemType"]["ActivationType"] == 'all' else ActivationType.SupportedBy.HIPBLASLT
    enumName = "%sActivationType_%s"%(self.actGradientPrefix, activationCDataType.toChar())
    fileString += "namespace Tensile {\n"
    fileString += "enum class %s : uint32_t\n"%enumName
    fileString += "{\n"
    enumList = ActivationType.getEnumStrList(activationCDataType, supportedBy, exportType=self.actExportType)
    for idx, enumStr in enumerate(enumList):
      fileString += "  %s = %s,\n"%(ActivationType(enumStr).toEnum(), ActivationType.getEnumIndex(enumStr))
    fileString += "};\n"
    fileString += "}  // End of namespace Tensile\n"

    return fileString