from __future__ import absolute_import, division, print_function, unicode_literals
#########################################################################
#                                                                       #
#                                                                       #
#   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.                            #
#                                                                       #
#                                                                       #
#########################################################################
# $Revision: 1.41 $
# $Date: 2006/03/24 23:50:07 $
import sys, os

from calibre.ebooks.rtf2xml import headings_to_sections, \
    line_endings, footnote, fields_small, default_encoding, \
    make_lists, preamble_div, header, colors, group_borders, \
    check_encoding, add_brackets, table, combine_borders, \
    fields_large, process_tokens, hex_2_utf8, tokenize, \
    delete_info, sections, check_brackets, styles, \
    paragraph_def, convert_to_tags, output, copy, \
    list_numbers, info, pict, table_info, fonts, paragraphs, \
    body_styles, preamble_rest, group_styles, \
    inline
from calibre.ebooks.rtf2xml.old_rtf import OldRtf
from polyglot.builtins import unicode_type

from . import open_for_read, open_for_write

"""
Here is an example script using the ParseRTF module directly
#!/usr/bin/env python2

def Handle_Main():
    # Handles options and creates a parse object
    parse_obj =ParseRtf.ParseRtf(
            in_file = 'in.rtf',
            # All values from here on are optional
            # determine the output file
            out_file = 'out.xml',
            # determine the run level. The default is 1.
            run_level = 3,
            # The name of a debug directory, if you are running at
            # run level 3 or higer.
            debug = 'debug_dir',
            # Convert RTF caps to real caps.
            # Default is 1.
            convert_caps = 1,
            # Indent resulting XML.
            # Default is 0 (no indent).
            indent = 1,
            # Form lists from RTF. Default is 1.
            form_lists = 1,
            # Convert headings to sections. Default is 0.
            headings_to_sections = 1,
            # Group paragraphs with the same style name. Default is 1.
            group_styles = 1,
            # Group borders. Default is 1.
            group_borders = 1,
            # Write or do not write paragraphs. Default is 0.
            empty_paragraphs = 0,
            # Allow to use a custom default encoding as fallback
            default_encoding = 'cp1252',
    )
    try:
        parse_obj.parse_rtf()
    except ParseRtf.InvalidRtfException, msg:
        sys.stderr.write(msg)
    except ParseRtf.RtfInvalidCodeException, msg:
        sys.stderr.write(msg)
"""


class InvalidRtfException(Exception):
    """
    handle invalid RTF
    """
    pass


class RtfInvalidCodeException(Exception):
    """
    handle bugs in program
    """
    pass


class ParseRtf:
    """
    Main class for controlling the rest of the parsing.
    """

    def __init__(self,
                in_file,
                out_file='',
                out_dir=None,
                dtd='',
                deb_dir=None,
                convert_symbol=None,
                convert_wingdings=None,
                convert_zapf=None,
                convert_caps=None,
                run_level=1,
                indent=None,
                replace_illegals=1,
                form_lists=1,
                headings_to_sections=1,
                group_styles=1,
                group_borders=1,
                empty_paragraphs=1,
                no_dtd=0,
                char_data='',
                default_encoding='cp1252',
                ):
        """
        Requires:
        'file' --file to parse
        'char_data' --file containing character maps
        'dtd' --path to dtd
        Possible parameters, but not necessary:
            'output' --a file to output the parsed file. (Default is standard
            output.)
            'temp_dir' --directory for temporary output (If not provided, the
            script tries to output to directory where is script is exectued.)
            'deb_dir' --debug directory. If a debug_dir is provided, the script
            will copy each run through as a file to examine in the debug_dir
            'check_brackets' -- make sure the brackets match up after each run
            through a file. Only for debugging.
        Returns: Nothing
        """

        self.__file = in_file
        self.__out_file = out_file
        self.__out_dir = out_dir
        self.__temp_dir = out_dir
        self.__dtd_path = dtd
        self.__check_file(in_file,"file_to_parse")
        self.__char_data = char_data
        self.__debug_dir = deb_dir
        self.__check_dir(self.__temp_dir)
        self.__copy = self.__check_dir(self.__debug_dir)
        self.__convert_caps = convert_caps
        self.__convert_symbol = convert_symbol
        self.__convert_wingdings = convert_wingdings
        self.__convert_zapf = convert_zapf
        self.__run_level = run_level
        self.__exit_level = 0
        self.__indent = indent
        self.__replace_illegals = replace_illegals
        self.__form_lists = form_lists
        self.__headings_to_sections = headings_to_sections
        self.__group_styles = group_styles
        self.__group_borders = group_borders
        self.__empty_paragraphs = empty_paragraphs
        self.__no_dtd = no_dtd
        self.__default_encoding = default_encoding

    def __check_file(self, the_file, type):
        """Check to see if files exist"""
        if hasattr(the_file, 'read'):
            return
        if the_file is None:
            if type == "file_to_parse":
                msg = "\nYou must provide a file for the script to work"
            raise RtfInvalidCodeException(msg)
        elif os.path.exists(the_file):
            pass  # do nothing
        else:
            msg = "\nThe file '%s' cannot be found" % the_file
            raise RtfInvalidCodeException(msg)

    def __check_dir(self, the_dir):
        """Check to see if directory exists"""
        if not the_dir :
            return
        dir_exists = os.path.isdir(the_dir)
        if not dir_exists:
            msg = "\n%s is not a directory" % the_dir
            raise RtfInvalidCodeException(msg)
        return 1

    def parse_rtf(self):
        """
        Parse the file by calling on other classes.
        Requires:
            Nothing
        Returns:
            A parsed file in XML, either to standard output or to a file,
            depending on the value of 'output' when the instance was created.
        """
        self.__temp_file = self.__make_temp_file(self.__file)
        # if the self.__deb_dir is true, then create a copy object,
        # set the directory to write to, remove files, and copy
        # the new temporary file to this directory
        if self.__debug_dir:
            copy_obj = copy.Copy(
                bug_handler=RtfInvalidCodeException,
                    )
            copy_obj.set_dir(self.__debug_dir)
            copy_obj.remove_files()
            copy_obj.copy_file(self.__temp_file, "original_file")
        # Function to check if bracket are well handled
        if self.__debug_dir or self.__run_level > 2:
            self.__check_brack_obj = check_brackets.CheckBrackets(
                file=self.__temp_file,
                bug_handler=RtfInvalidCodeException,
            )
        # convert Macintosh and Windows line endings to Unix line endings
        # why do this if you don't wb after?
        line_obj = line_endings.FixLineEndings(
                in_file=self.__temp_file,
                bug_handler=RtfInvalidCodeException,
                copy=self.__copy,
                run_level=self.__run_level,
                replace_illegals=self.__replace_illegals,
                )
        return_value = line_obj.fix_endings()  # calibre return what?
        self.__return_code(return_value)
        tokenize_obj = tokenize.Tokenize(
                bug_handler=RtfInvalidCodeException,
                in_file=self.__temp_file,
                copy=self.__copy,
                run_level=self.__run_level)
        tokenize_obj.tokenize()
        process_tokens_obj = process_tokens.ProcessTokens(
            in_file=self.__temp_file,
            bug_handler=RtfInvalidCodeException,
            copy=self.__copy,
            run_level=self.__run_level,
            exception_handler=InvalidRtfException,
            )
        try:
            return_value = process_tokens_obj.process_tokens()
        except InvalidRtfException as msg:
            # Check to see if the file is correctly encoded
            encode_obj = default_encoding.DefaultEncoding(
            in_file=self.__temp_file,
            run_level=self.__run_level,
            bug_handler=RtfInvalidCodeException,
            check_raw=True,
            default_encoding=self.__default_encoding,
            )
            platform, code_page, default_font_num = encode_obj.find_default_encoding()
            check_encoding_obj = check_encoding.CheckEncoding(
                    bug_handler=RtfInvalidCodeException,
                        )
            enc = encode_obj.get_codepage()
            # TODO: to check if cp is a good idea or if I should use a dict to convert
            enc = 'cp' + enc
            msg = '%s\nException in token processing' % unicode_type(msg)
            if check_encoding_obj.check_encoding(self.__file, enc):
                file_name = self.__file if isinstance(self.__file, bytes) \
                                    else self.__file.encode('utf-8')
                msg +='\nFile %s does not appear to be correctly encoded.\n' % file_name
            try:
                os.remove(self.__temp_file)
            except OSError:
                pass
            raise InvalidRtfException(msg)
        delete_info_obj = delete_info.DeleteInfo(
            in_file=self.__temp_file,
            copy=self.__copy,
            bug_handler=RtfInvalidCodeException,
            run_level=self.__run_level,)
        # found destination means {\*\destination
        # if found, the RTF should be newer RTF
        found_destination = delete_info_obj.delete_info()
        self.__bracket_match('delete_data_info')
        # put picts in a separate file
        pict_obj = pict.Pict(
            in_file=self.__temp_file,
            bug_handler=RtfInvalidCodeException,
            copy=self.__copy,
            orig_file=self.__file,
            out_file=self.__out_file,
            run_level=self.__run_level,
           )
        pict_obj.process_pict()
        self.__bracket_match('pict_data_info')
        combine_obj = combine_borders.CombineBorders(
            in_file=self.__temp_file,
            bug_handler=RtfInvalidCodeException,
            copy=self.__copy,
            run_level=self.__run_level,)
        combine_obj.combine_borders()
        self.__bracket_match('combine_borders_info')
        footnote_obj = footnote.Footnote(
            in_file=self.__temp_file,
            bug_handler=RtfInvalidCodeException,
            copy=self.__copy,
            run_level=self.__run_level,
            )
        footnote_obj.separate_footnotes()
        self.__bracket_match('separate_footnotes_info')
        header_obj = header.Header(
            in_file=self.__temp_file,
            bug_handler=RtfInvalidCodeException,
            copy=self.__copy,
            run_level=self.__run_level,
            )
        header_obj.separate_headers()
        self.__bracket_match('separate_headers_info')
        list_numbers_obj = list_numbers.ListNumbers(
            in_file=self.__temp_file,
            bug_handler=RtfInvalidCodeException,
            copy=self.__copy,
            run_level=self.__run_level,
            )
        list_numbers_obj.fix_list_numbers()
        self.__bracket_match('list_number_info')
        preamble_div_obj = preamble_div.PreambleDiv(
            in_file=self.__temp_file,
            bug_handler=RtfInvalidCodeException,
            copy=self.__copy,
            run_level=self.__run_level,
             )
        list_of_lists = preamble_div_obj.make_preamble_divisions()
        self.__bracket_match('make_preamble_divisions')
        encode_obj = default_encoding.DefaultEncoding(
            in_file=self.__temp_file,
            run_level=self.__run_level,
            bug_handler=RtfInvalidCodeException,
            default_encoding=self.__default_encoding,
            )
        platform, code_page, default_font_num = encode_obj.find_default_encoding()
        hex2utf_obj = hex_2_utf8.Hex2Utf8(
                in_file=self.__temp_file,
                copy=self.__copy,
                area_to_convert='preamble',
                char_file=self.__char_data,
                default_char_map=code_page,
                run_level=self.__run_level,
                bug_handler=RtfInvalidCodeException,
                invalid_rtf_handler=InvalidRtfException,
                )
        hex2utf_obj.convert_hex_2_utf8()
        self.__bracket_match('hex_2_utf_preamble')
        fonts_obj = fonts.Fonts(
            in_file=self.__temp_file,
            bug_handler=RtfInvalidCodeException,
            copy=self.__copy,
            default_font_num=default_font_num,
            run_level=self.__run_level,
            )
        special_font_dict = fonts_obj.convert_fonts()
        self.__bracket_match('fonts_info')
        color_obj = colors.Colors(
            in_file=self.__temp_file,
            copy=self.__copy,
            bug_handler=RtfInvalidCodeException,
            run_level=self.__run_level,
            )
        color_obj.convert_colors()
        self.__bracket_match('colors_info')
        style_obj = styles.Styles(
            in_file=self.__temp_file,
            bug_handler=RtfInvalidCodeException,
            copy=self.__copy,
            run_level=self.__run_level,
            )
        style_obj.convert_styles()
        self.__bracket_match('styles_info')
        info_obj = info.Info(
            in_file=self.__temp_file,
            bug_handler=RtfInvalidCodeException,
            copy=self.__copy,
            run_level=self.__run_level,
            )
        info_obj.fix_info()
        default_font = special_font_dict.get('default-font')
        preamble_rest_obj = preamble_rest.Preamble(
            file=self.__temp_file, copy=self.__copy,
            bug_handler=RtfInvalidCodeException,
            platform=platform, default_font=default_font,
            code_page=code_page)
        preamble_rest_obj.fix_preamble()
        self.__bracket_match('preamble_rest_info')
        old_rtf_obj = OldRtf(
                in_file=self.__temp_file,
                bug_handler=RtfInvalidCodeException,
                run_level=self.__run_level,
                )
        # RTF can actually have destination groups and old RTF.
        # BAH!
        old_rtf = old_rtf_obj.check_if_old_rtf()
        if old_rtf:
            if self.__run_level > 5:
                msg = 'Older RTF\n' \
                'self.__run_level is "%s"\n' % self.__run_level
                raise RtfInvalidCodeException(msg)
            if self.__run_level > 1:
                sys.stderr.write('File could be older RTF...\n')
            if found_destination:
                if self.__run_level > 1:
                    sys.stderr.write(
                        'File also has newer RTF.\n'
                        'Will do the best to convert...\n'
                    )
            add_brackets_obj = add_brackets.AddBrackets(
                    in_file=self.__temp_file,
                    bug_handler=RtfInvalidCodeException,
                    copy=self.__copy,
                    run_level=self.__run_level,
                    )
            add_brackets_obj.add_brackets()
        fields_small_obj = fields_small.FieldsSmall(
            in_file=self.__temp_file,
            copy=self.__copy,
            bug_handler=RtfInvalidCodeException,
            run_level=self.__run_level,)
        fields_small_obj.fix_fields()
        self.__bracket_match('fix_small_fields_info')
        fields_large_obj = fields_large.FieldsLarge(
            in_file=self.__temp_file,
            copy=self.__copy,
            bug_handler=RtfInvalidCodeException,
            run_level=self.__run_level)
        fields_large_obj.fix_fields()
        self.__bracket_match('fix_large_fields_info')
        sections_obj = sections.Sections(
            in_file=self.__temp_file,
            bug_handler=RtfInvalidCodeException,
            copy=self.__copy,
            run_level=self.__run_level,)
        sections_obj.make_sections()
        self.__bracket_match('sections_info')
        paragraphs_obj = paragraphs.Paragraphs(
            in_file=self.__temp_file,
            bug_handler=RtfInvalidCodeException,
            copy=self.__copy,
            write_empty_para=self.__empty_paragraphs,
            run_level=self.__run_level,)
        paragraphs_obj.make_paragraphs()
        self.__bracket_match('paragraphs_info')
        default_font = special_font_dict['default-font']
        paragraph_def_obj = paragraph_def.ParagraphDef(
            in_file=self.__temp_file,
            bug_handler=RtfInvalidCodeException,
            copy=self.__copy,
            default_font=default_font,
            run_level=self.__run_level,)
        list_of_styles = paragraph_def_obj.make_paragraph_def()
        body_styles_obj = body_styles.BodyStyles(
            in_file=self.__temp_file,
            bug_handler=RtfInvalidCodeException,
            copy=self.__copy,
            list_of_styles=list_of_styles,
            run_level=self.__run_level,)
        body_styles_obj.insert_info()
        self.__bracket_match('body_styles_info')
        self.__bracket_match('paragraph_def_info')
        table_obj = table.Table(
                in_file=self.__temp_file,
                bug_handler=RtfInvalidCodeException,
                copy=self.__copy,
                run_level=self.__run_level,)
        table_data = table_obj.make_table()
        self.__bracket_match('table_info')
        table_info_obj = table_info.TableInfo(
            in_file=self.__temp_file,
            bug_handler=RtfInvalidCodeException,
            copy=self.__copy,
            table_data=table_data,
            run_level=self.__run_level,)
        table_info_obj.insert_info()
        self.__bracket_match('table__data_info')
        if self.__form_lists:
            make_list_obj =  make_lists.MakeLists(
                in_file=self.__temp_file,
                bug_handler=RtfInvalidCodeException,
                copy=self.__copy,
                headings_to_sections=self.__headings_to_sections,
                run_level=self.__run_level,
                list_of_lists=list_of_lists,
                )
            make_list_obj.make_lists()
            self.__bracket_match('form_lists_info')
        if self.__headings_to_sections:
            headings_to_sections_obj =  headings_to_sections.HeadingsToSections(
                in_file=self.__temp_file,
                bug_handler=RtfInvalidCodeException,
                copy=self.__copy,
                run_level=self.__run_level,)
            headings_to_sections_obj.make_sections()
            self.__bracket_match('headings_to_sections_info')
        if self.__group_styles:
            group_styles_obj = group_styles.GroupStyles(
                in_file=self.__temp_file,
                bug_handler=RtfInvalidCodeException,
                copy=self.__copy,
                wrap=1,
                run_level=self.__run_level,)
            group_styles_obj.group_styles()
            self.__bracket_match('group_styles_info')
        if self.__group_borders:
            group_borders_obj = group_borders.GroupBorders(
                in_file=self.__temp_file,
                bug_handler=RtfInvalidCodeException,
                copy=self.__copy,
                wrap=1,
                run_level=self.__run_level,)
            group_borders_obj.group_borders()
            self.__bracket_match('group_borders_info')
        inline_obj = inline.Inline(
                in_file=self.__temp_file,
                bug_handler=RtfInvalidCodeException,
                copy=self.__copy,
                run_level=self.__run_level,)
        inline_obj.form_tags()
        self.__bracket_match('inline_info')
        hex2utf_obj.update_values(file=self.__temp_file,
                            area_to_convert='body',
                            copy=self.__copy,
                            char_file=self.__char_data,
                            convert_caps=self.__convert_caps,
                            convert_symbol=self.__convert_symbol,
                            convert_wingdings=self.__convert_wingdings,
                            convert_zapf=self.__convert_zapf,
                            symbol=1,
                            wingdings=1,
                            dingbats=1,
                )
        hex2utf_obj.convert_hex_2_utf8()
        header_obj.join_headers()
        footnote_obj.join_footnotes()
        tags_obj = convert_to_tags.ConvertToTags(
                in_file=self.__temp_file,
                copy=self.__copy,
                dtd_path=self.__dtd_path,
                indent=self.__indent,
                run_level=self.__run_level,
                no_dtd=self.__no_dtd,
                encoding=encode_obj.get_codepage(),
                bug_handler=RtfInvalidCodeException,
                )
        tags_obj.convert_to_tags()
        output_obj = output.Output(
                file=self.__temp_file,
                orig_file=self.__file,
                output_dir=self.__out_dir,
                out_file=self.__out_file,
            )
        output_obj.output()
        os.remove(self.__temp_file)
        return self.__exit_level

    def __bracket_match(self, file_name):
        if self.__run_level > 2:
            good_br, msg =  self.__check_brack_obj.check_brackets()
            if good_br:
                pass
                # sys.stderr.write( msg + ' in ' + file_name + "\n")
            else:
                msg = '%s in file %s' % (msg, file_name)
                print(msg, file=sys.stderr)

    def __return_code(self, num):
        if num is None:
            return
        if int(num) > self.__exit_level:
            self.__exit_level = num

    def __make_temp_file(self,file):
        """Make a temporary file to parse"""
        write_file="rtf_write_file"
        read_obj = file if hasattr(file, 'read') else open_for_read(file)
        with open_for_write(write_file) as write_obj:
            for line in read_obj:
                write_obj.write(line)
        return write_file
