import argparse
import os
import sys
from subprocess import check_call, DEVNULL, STDOUT, CalledProcessError

parser = argparse.ArgumentParser(description='Convert sgf go records into a kifu format.')

parser.add_argument('sgfFile')
parser.add_argument('-se', "--splitevery", dest="step", type=int, default=50)
parser.add_argument('-c', "--compile", action="store_true", dest="c", default=False)
parser.add_argument('-o', "--open", action="store_true", dest="o", default=False)

args = parser.parse_args(sys.argv[1:])

filePath = args.sgfFile
fileBase = ".".join(filePath.split(".")[:-1])
splitBoardAt = [x for x in range(0, 400, args.step)]

with open(filePath, 'r') as myfile:
    sgfData = myfile.read().replace("\n", "").split(";")[1:]
    sgfData[-1] = sgfData[-1][:-1]

header = sgfData[0]
moves = sgfData[1:]

def get_tag_from_header(tag):
    eventIdxStart = header.lower().find(f"{tag.lower()}[")
    eventIdxEnd = -1

    if eventIdxStart != -1 :
        eventIdxEnd =  header.find("]", eventIdxStart)
        return header[len(tag) + 1 + eventIdxStart:eventIdxEnd]
    return ""

def extract_coordinates(move):
    try:
        firstCoordinate = move[2]
        secondCoordinate = ord(move[3])-96
        # mirror at x axis so it looks normal
        secondCoordinate = parsedHeader["boardSize"] - secondCoordinate + 1
        if ord(move[2]) >= ord("i"):
            firstCoordinate = chr(ord(firstCoordinate) + 1)
        return firstCoordinate, secondCoordinate
    except IndexError:
        # wierd move
        return -1,-1

def generate_title():
    out = []
    if parsedHeader["event"] != "":
        out.extend([parsedHeader["event"], "\\\\"])
    out.append(parsedHeader["playerBlack"])
    if parsedHeader["rankBlack"] != "":
        out.extend(["[", parsedHeader["rankBlack"], "]"])
    out.extend([" - ", parsedHeader["playerWhite"]])
    if parsedHeader["rankWhite"] != "":
        out.extend(["[", parsedHeader["rankWhite"], "]"])

    return "".join(out)

def generate_moves():
    finished = False
    outText = []
    for i in range(len(splitBoardAt)-1):
        currentSplit = splitBoardAt[i]
        nextSplit = splitBoardAt[i+1]

        outText.extend(["\n\\setcounter{gomove}{0}\n", "\\begin{psgoboard}\n\t"])

        # old moves
        for j in range(currentSplit):
            firstCoordinate, secondCoordinate = extract_coordinates(moves[j])
            if not (firstCoordinate == -1 or secondCoordinate == -1):
                outText.append(f"\\move*{{{firstCoordinate}}}{{{secondCoordinate}}} ")
                if j % 5 == 4:
                    outText.append("\n\t")
                elif secondCoordinate < 10: # nice spacing
                    outText.append(" ")

        # new moves
        for j in range(nextSplit-currentSplit):
            firstCoordinate, secondCoordinate = extract_coordinates(moves[currentSplit+j])
            if not (firstCoordinate == -1 or secondCoordinate == -1):
                outText.append(f"\\move{{{firstCoordinate}}}{{{secondCoordinate}}}  ")
                if j % 5 == 4:
                    outText.append("\n\t")
                elif secondCoordinate < 10: # nice spacing
                    outText.append(" ")

            # was it the last move?
            if currentSplit+j == len(moves)-1:
                finished = True
                break

        outText.append("\n\\end{psgoboard}\n")
        if finished:
            break

    return "".join(outText)

parsedHeader = {
    "event"       : get_tag_from_header("EV"),
    "gameName"    : get_tag_from_header("GN"),
    "date"        : get_tag_from_header("RD"),
    "boardSize"   : int(get_tag_from_header("SZ")),
    "playerBlack" : get_tag_from_header("PB"),
    "playerWhite" : get_tag_from_header("PW"),
    "rankBlack"   : get_tag_from_header("BR"),
    "rankWhite"   : get_tag_from_header("WR"),
    "komi"        : get_tag_from_header("KM"),
    "result"      : get_tag_from_header("RE")
}


title = generate_title()
date = parsedHeader["date"]
moves = generate_moves()
result = parsedHeader["result"]

outText = f"""
\\documentclass[a4paper]{{article}}
\\usepackage{{psgo}}
\\usepackage[ngerman]{{babel}}
\\usepackage[margin=2cm,nohead]{{geometry}}

\\setgounit{{0.5cm}}

\\author{{}}
\\title{{{title}}}
\\date{{{date}}}

\\begin{{document}}
\\maketitle
\\vspace{{3.5cm}}
\\begin{{center}}

{moves}

\\textbf{{{result}}}

\\end{{center}}
\\end{{document}}
"""

with open(f"{fileBase}.tex", 'w') as outFile:
    outFile.write(outText)

# should be compiled to pdf?
if args.c:
    try:
        check_call(['latex',  f"{fileBase}.tex"], stdout=DEVNULL, stderr=STDOUT)
        check_call(['dvips',  f"{fileBase}.dvi", "-P", "pdf"], stdout=DEVNULL, stderr=STDOUT)
        check_call(['ps2pdf', f"{fileBase}.ps"],  stdout=DEVNULL, stderr=STDOUT)
    except CalledProcessError:
        print("error")
    else:
        if args.o:
            os.system(f'"{fileBase}.pdf"')