import os

import re

import config as cfg

import go

from go import BLACK,WHITE,EMPTY

from sgfParser import ParserError

from sgfParser.collection import Collection

from drawer.svg import Svg

from drawer.tikz import Tikz

def collectMoves(root):

	node=root

	while len(node.children)>0:

		b=node.getProp("B")

		w=node.getProp("W")

		if b is not None: yield ("b",b)

		elif w is not None: yield ("w",w)

		# else: yield None # !! not really robust

		node=node.children[0]

class SourceFile:

	def __init__(self,fileName):

		self.fileName=fileName

		self._shortName= "".join(re.split(r'[/\\]', fileName)[-1].split('.')[:-1])

		self._game=go.Go()

		games=Collection(open(self.fileName, 'r', encoding=cfg.encoding).read()).listGames()

		self._record=list(games)[0]

		self._moves=list(collectMoves(self._record.root))

	def process(self):

		print("{0}... ".format(self.fileName), end="")

		i=1

		for k in range(0,len(self._moves),cfg.movesPerDiagram):

			filename=os.path.join(cfg.outputDir,"{0}-{1}".format(self._shortName,i))

			self.createDiagram(k,k+cfg.movesPerDiagram).save(filename,"templ-pleb.svg")

			i+=1

		notes=open(os.path.join(cfg.outputDir,"{0}.txt".format(self._shortName)), 'w')

		notes.write(self.createGameInfo())

		notes.close()

		print("done")

	def createDiagram(self,start,end):

		# initialize the diagram

		template=Svg()

		self._setMove(start)

		# draw current state

		for lineNumber,line in enumerate(self._game.board):

			for itemNumber,item in enumerate(line):

				if item!=EMPTY: template.addStone(itemNumber,lineNumber,"b" if item==BLACK else "w")

		# draw the moves

		for k in range(start,end):

			if k>=len(self._moves): break

			color,move=self._moves[k]

			if move==tuple():

				template.overlays.append((k,"pass")) # !!

				continue

			else:

				(c,r)=move

			if not self._move(color,c,r):

				if cfg.keepBroken: continue

				else: return False

			# draw the move

			template.addMove(c,r,color,k+1)

		return template

	def createGameInfo(self):

		rec=self._record

		return """{title}

B: {black} {bRank}

W: {white} {wRank}

{date}

{result}""".format(title=rec.get("GN",""), black=rec.get("PB",""), bRank=rec.get("BR",""), white=rec.get("PW",""), wRank=rec.get("WR",""), date=rec.get("DT",""), result=rec.get("RE",""))

	def _setMove(self,k):

		self._game=go.Go()

		for i in range(k):

			(color,move)=self._moves[i]

			if move==tuple(): continue # pass

			self._move(color,*move)

	def _move(self,color,c,r):

		if not self._game.move(BLACK if color=='b' else WHITE, c,r):

			# !! we do not honor http://red-bean.com/sgf/ff5/m_vs_ax.htm at the moment

			msg="illegal move: {0} at {1},{2}".format(self._game.moveCount+1,c,r)

			if cfg.keepBroken:

				print(msg)

			else:

				msg+=". aborted"

				print(msg)

				return False

		return True

if __name__=="__main__":

	print("processing:")

	files=cfg.inputFiles[:]

	for item in files:

		if os.path.isfile(item):

			try:

				f=SourceFile(item)

				f.process()

			except ParserError as e:

				print("Couldn't parse {0}, following error occured: {1}".format(item,e))

		elif os.path.isdir(item):

			files+=[os.path.join(item,child) for child in os.listdir(item)]

			print("contents of the '{0}' directory added to the queue".format(item))

		else: print("the '{0}' path could not be resolved to either a file nor a directory".format(item))