from __future__ import unicode_literals, absolute_import, print_function, division
#########################################################################
#                                                                       #
#                                                                       #
#   copyright 2002 Paul Henry Tremblay                                  #
#                                                                       #
#   This program is distributed in the hope that it will be useful,     #
#   but WITHOUT ANY WARRANTY; without even the implied warranty of      #
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU    #
#   General Public License for more details.                            #
#                                                                       #
#                                                                       #
#########################################################################
import os

from calibre.ebooks.rtf2xml import copy
from calibre.ptempfile import better_mktemp
from . import open_for_read, open_for_write


class CombineBorders:
    """Combine borders in RTF tokens to make later processing easier"""

    def __init__(self,
            in_file ,
            bug_handler,
            copy=None,
            run_level=1,
            ):
        self.__file = in_file
        self.__bug_handler = bug_handler
        self.__copy = copy
        self.__write_to = better_mktemp()
        self.__state = 'default'
        self.__bord_pos = 'default'
        self.__bord_att = []

    def found_bd(self, line):
        # cw<bd<bor-t-r-vi
        self.__state = 'border'
        self.__bord_pos = line[6:16]

    def __default_func(self, line):
        # cw<bd<bor-t-r-vi
        if self.__first_five == 'cw<bd':
            self.found_bd(line)
            return ''
        return line

    def end_border(self, line, write_obj):
        border_string = "|".join(self.__bord_att)
        self.__bord_att = []
        write_obj.write('cw<bd<%s<nu<%s\n' % (self.__bord_pos,
                                                border_string))
        self.__state = 'default'
        self.__bord_string = ''
        if self.__first_five == 'cw<bd':
            self. found_bd(line)
        else:
            write_obj.write(line)

    def add_to_border_desc(self, line):
        # cw<bt<bdr-hair__<nu<true
        # cw<bt<bdr-linew<nu<0.50
        # tx<__________<some text
        border_desc = line[6:16]
        num = line[20:-1]
        if num == 'true':
            num = ''
        else:
            num = ':' + num
        self.__bord_att.append(border_desc + num)

    def __border_func(self, line, write_obj):
        if self.__first_five != 'cw<bt':
            self.end_border(line, write_obj)
        else:
            self.add_to_border_desc(line)

    def combine_borders(self):
        with open_for_read(self.__file) as read_obj:
            with open_for_write(self.__write_to) as write_obj:
                for line in read_obj:
                    self.__first_five = line[0:5]
                    if self.__state == 'border':
                        self.__border_func(line, write_obj)
                    else:
                        write_obj.write(self.__default_func(line))
        copy_obj = copy.Copy(bug_handler=self.__bug_handler)
        if self.__copy:
            copy_obj.copy_file(self.__write_to, "combine_borders.data")
        copy_obj.rename(self.__write_to, self.__file)
        os.remove(self.__write_to)
