# ==================================================================================================================== #
#            __     ___   _ ____  _     ____                                                                           #
#  _ __  _   \ \   / / | | |  _ \| |   |  _ \ __ _ _ __ ___  ___ _ __                                                  #
# | '_ \| | | \ \ / /| |_| | | | | |   | |_) / _` | '__/ __|/ _ \ '__|                                                 #
# | |_) | |_| |\ V / |  _  | |_| | |___|  __/ (_| | |  \__ \  __/ |                                                    #
# | .__/ \__, | \_/  |_| |_|____/|_____|_|   \__,_|_|  |___/\___|_|                                                    #
# |_|    |___/                                                                                                         #
# ==================================================================================================================== #
# Authors:                                                                                                             #
#   Patrick Lehmann                                                                                                    #
#                                                                                                                      #
# License:                                                                                                             #
# ==================================================================================================================== #
# Copyright 2017-2021 Patrick Lehmann - Boetzingen, Germany                                                            #
# Copyright 2016-2017 Patrick Lehmann - Dresden, Germany                                                               #
#                                                                                                                      #
# Licensed under the Apache License, Version 2.0 (the "License");                                                      #
# you may not use this file except in compliance with the License.                                                     #
# You may obtain a copy of the License at                                                                              #
#                                                                                                                      #
#   http://www.apache.org/licenses/LICENSE-2.0                                                                         #
#                                                                                                                      #
# Unless required by applicable law or agreed to in writing, software                                                  #
# distributed under the License is distributed on an "AS IS" BASIS,                                                    #
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.                                             #
# See the License for the specific language governing permissions and                                                  #
# limitations under the License.                                                                                       #
# ==================================================================================================================== #
#
from pyTooling.Decorators     import export

from pyVHDLParser.Token       import SpaceToken, IndentationToken
from pyVHDLParser.Blocks      import ParserState, SkipableBlock


@export
class WhitespaceBlock(SkipableBlock):
	def __init__(self, previousBlock, startToken):
		super().__init__(previousBlock, startToken, startToken)

	def __repr__(self):
		return "[{blockName: <50s}  {stream} at {start!s} .. {end!s}]".format(
			blockName=type(self).__name__,
			stream=" "*61,
			start=self.StartToken.Start,
			end=self.EndToken.End
		)


@export
class LinebreakBlock(WhitespaceBlock):
	@classmethod
	def stateLinebreak(cls, parserState: ParserState):
		token = parserState.Token
		if isinstance(token, SpaceToken):
			parserState.NewToken = IndentationToken(token)
			parserState.NewBlock = IndentationBlock(parserState.LastBlock, parserState.NewToken)
			parserState.Pop()
			# print("  {GREEN}continue: {0!s}{NOCOLOR}".format(parserState, **Console.Foreground))
		else:
			parserState.Pop()
			if (parserState.TokenMarker is None):
				# print("  {DARK_GREEN}set marker: {GREEN}LinebreakBlock.stateLinebreak    {DARK_GREEN}marker {GREEN}{0!s}{NOCOLOR}".format(token, **Console.Foreground))
				parserState.TokenMarker = token
			# print("  {DARK_GREEN}re-issue:   {GREEN}{state!s: <20s}    {DARK_GREEN}token  {GREEN}{token}{NOCOLOR}".format(state=parserState, token=parserState.Token, **Console.Foreground))
			parserState.NextState(parserState)


@export
class EmptyLineBlock(LinebreakBlock):
	pass


@export
class IndentationBlock(WhitespaceBlock):
	__TABSIZE__ = 2

	def __repr__(self):
		length = len(self.StartToken.Value)
		actual = sum([(self.__TABSIZE__ if (c == "\t") else 1) for c in self.StartToken.Value])

		return "[{blockName: <50s}  length={len: <53}  at {start!s} .. {end!s}]".format(
				blockName=type(self).__name__,
				len="{len} ({actual}) ".format(
					len=length,
					actual=actual
				),
				start=self.StartToken.Start,
				end=self.EndToken.End
			)
