from fontTools.misc import sstruct
from fontTools.misc.textTools import safeEval
from fontTools.misc.timeTools import timestampFromString, timestampToString
from . import DefaultTable

FFTMFormat = """
		>	# big endian
		version:        I
		FFTimeStamp:    Q
		sourceCreated:  Q
		sourceModified: Q
"""

class table_F_F_T_M_(DefaultTable.DefaultTable):

	def decompile(self, data, ttFont):
		dummy, rest = sstruct.unpack2(FFTMFormat, data, self)

	def compile(self, ttFont):
		data = sstruct.pack(FFTMFormat, self)
		return data

	def toXML(self, writer, ttFont):
		writer.comment("FontForge's timestamp, font source creation and modification dates")
		writer.newline()
		formatstring, names, fixes = sstruct.getformat(FFTMFormat)
		for name in names:
			value = getattr(self, name)
			if name in ("FFTimeStamp", "sourceCreated", "sourceModified"):
				value = timestampToString(value)
			writer.simpletag(name, value=value)
			writer.newline()

	def fromXML(self, name, attrs, content, ttFont):
		value = attrs["value"]
		if name in ("FFTimeStamp", "sourceCreated", "sourceModified"):
			value = timestampFromString(value)
		else:
			value = safeEval(value)
		setattr(self, name, value)