import re
import string
import sys
from html.parser import HTMLParser
from pathlib import Path

import pythonbible as bible
from bs4 import BeautifulSoup
from loguru import logger
from tqdm import tqdm

base = Path('./xml/Matthew Henry Commentary').absolute()

logger.remove(0)
logger.add('log.txt')

class MyHTMLParser(HTMLParser):
    file = None
    passage_verse = None
    tag = None
    tag_type = None  # 'start' or 'end'
    skip_re = False
    attrs = dict()

    # All the patterns are for re.sub(). This is specifically for getting
    # list/sublist into the correct position. The first item is for the pattern
    # to find and the second is the replacement pattern. The replacement pattern
    # also ids the list so that when the self.clean_file() we can properly add
    # the correct amount of `\t` to the line.
    patterns = [
        (r"\[(\d+\.)\]", lambda x: f'\n{x.group(1)}~4'),
        (r"\((\d+\.)\)", lambda x: f'\n{x.group(1)}~3'),

        # These share the same id. There are times were the two are a mixed
        # within the parent lists.
        (r"^\b(\d+\.)", lambda x: f'\n{x.group(1)}~2'),
        (r"(\S\s)(\d+\.)(\s\b|\W)",
         lambda x: f'{x.group(1)}\n{x.group(2)}~2{x.group(3)}'),


        (r"(?=[MDCLXVI])M*(C[MD]|D?C{0,3})(X[CL]|L?X{0,3})(I[XV]|V?I{0,3})\.",
         lambda x: f'\n{parser.roman_to_int(x.group())}.~1'),
    ]

    @staticmethod
    def roman_to_int(number: str) -> int:
        if number is None:
            return 0

        # Sometimes the roman numeral comes with a '.'. Striping to not cause
        # issues
        number = number.strip('.')

        roman = {'I': 1, 'V': 5, 'X': 10, 'L': 50, 'C': 100, 'D': 500, 'M': 1000}
        total = 0
        for i in range(len(number) - 1, -1, -1):
            num = roman[number[i]]
            if 3 * num < total:
                total -= num
            else:
                total += num

        return total

    def create_md_file(self, base_dir: Path, folder: str, file: str):
        """ Create the path of the md file that will be written to as the
        program process the xml file.
        """

        md_file = Path(f'{base_dir}/{folder}/{file}.md').absolute()
        md_file.parent.mkdir(parents=True, exist_ok=True)
        md_file.unlink(missing_ok=True)
        # print(md_file.absolute())
        self.file = md_file
        return md_file

    def write_to_file(self, data, skip_re=False):

        # if self.file is None:
        #     raise ValueError('No File specified')

        if not skip_re:
            # Here the list/sublist are searched for and altered for later
            # processing in self.clean_file()
            for pattern, sub in self.patterns:
                # logger.debug(f'Running Pattern: {pattern} on {data[:50]}')
                data = re.sub(pattern, sub, data)

        # print(f'writing: {data!r}')

        if self.file:
            # raise ValueError('No File specified')
            with open(self.file, 'a+') as file:
                file.write(data)
        else:
            print(data)

    def clean_file(self):
        logger.info(' CLEANING FILE')

        if self.file is None:
            raise ValueError('No File specified')

        # Read all the lines
        with open(self.file, 'r') as file:
            lines = file.readlines()

        indent = 0  # Current number of '\t' to add in front of the list number
        sublist = dict()  # Track the indent number based on the id.
        with open(self.file, 'w') as file:
            file.write('# Chapter Introduction\n\n')

            header = None
            for line in lines:
                # Do not write blank lines
                if not line.strip():
                    continue

                # Main header, if a header has already been written skip it
                if line.strip().startswith('# '):
                    if header == line.strip():
                        continue
                    header = line.strip()

                # Add a `\n` if line is a heading.
                if line.startswith('#'):
                    line = f'\n{line.strip()}'

                # If line is not a list then add a `\n` after the paragraph,
                # and reset the indent tracker
                if line.strip()[0] not in string.digits:
                    line = f'{line}\n'
                    # print('resetting indent')
                    indent = 0
                    sublist.clear()
                else:
                    # Get the list id
                    start = line.find('~')
                    end = start + 2
                    list_id = line[start:end]

                    # Get the number of indents based on the list id, if it does
                    # not exist they set the value to the max value +1. If this
                    # is the first it will be set to 0 (-1 +1 = 0)
                    indents = "\t" * sublist.setdefault(
                        list_id, max(sublist.values(), default=-1)+1
                    )
                    line = f'{indents}{line.replace(list_id, "")}'

                if line.startswith('Passage: '):
                    line = line.removeprefix('Passage: ')

                file.write(line)

    @staticmethod
    def normalize_osis_verses(verses):
        """Takes this 'Bible:John.1.3 Bible:John.1.10 Bible:Eph.3.9 Bible:Col.1.16 Bible:Heb.1.2 Bible:Acts.17.24-Acts.17.25'
        and turns it into somthing more readable"""
        normalized_refs = list()
        for chunks in verses.removeprefix("Bible:").split('Bible:'):
            spanned_verses = list()
            for ref in chunks.split('-'):
                verse = ref.replace('.', ' ', 1).replace('.', ':')
                spanned_verses.append(
                    bible.format_scripture_references(
                        bible.get_references(verse.strip())
                    )
                )

            try:
                normalized = bible.format_scripture_references(
                    bible.get_references('-'.join(spanned_verses))
                )
            except:
                logger.warning(f"Error with: {verses=}: {spanned_verses=}")
                raise
            normalized_refs.append(normalized)

        return ';'.join(normalized_refs)

    @staticmethod
    def obsidian_links(verses):
        """Take `Book Chapter:Ver-Ver and turn it into a obsidian bible link"""
        links = []
        for verse in verses.split(';'):
            links.append(f"[[{verse.replace(':', '#').replace('-', '..')}]]")

        return '; '.join(links)

    def convert_passage(self, verses):
        book = self.file.parts[-2]
        chapter = None
        ref = []
        for ver in verses.split(','):
            try:
                chapter, v = ver.split(':')
            except:
                v = ver

            r = []
            for i in v.split('-'):
                r.append(f'{book}.{chapter}.{i}')

            ref.append(f'Bible:{"-".join(r)}')
        x = ' '.join(ref)
        return f'osisRef="{x}"'

    def process_tag(self, test=None):
        match self.tag:
            case 'b':  # Bold
                self.write_to_file('**')

            case 'i':  # Italics
                self.write_to_file('*')

            case 'scripcom':
                # This saves the verse for the section.
                if self.tag_type == 'start':
                    if self.attrs['type'] == 'Commentary':
                        self.passage_verse = self.attrs['osisref']

            case 'h4':  # this is the section header. Need to keep track of it per file.
                if self.tag_type == 'start':
                    self.write_to_file('\n# ',)
                    self.skip_re = True

                if self.tag_type == 'end':
                    self.write_to_file('\n')
                    self.skip_re = False

            case 'scripref':  # Scripture ref
                # get attr 'osisref' and parse [..., ('passage', 'Bible:Rev.14.6-Rev.14.7')]
                #  bible.format_scripture_references(bible.get_references(attrs['osisref']))
                if self.tag_type == 'start':
                    if 'osisref' in self.attrs:
                        verses = self.normalize_osis_verses(
                            self.attrs['osisref']
                        )
                    else:
                        verses = self.normalize_osis_verses(
                            self.convert_passage(self.attrs['passage'])
                        )

                    self.write_to_file(self.obsidian_links(verses))

            case 'p':  # Paragraph
                if self.tag_type == 'start':
                    if self.attrs.get('class', False) == 'passage':
                        if self.passage_verse:
                            try:
                                verse = bible.get_references(
                                    self.normalize_osis_verses(
                                        self.passage_verse)
                                )[0]
                            except:
                                logger.debug(self.passage_verse)
                                raise

                            self.write_to_file('## Verses: ')
                            self.write_to_file(
                                f'{verse.start_verse} - {verse.end_verse}'
                            )
                            self.write_to_file('\n\n')

                        # Need this do the regex in self.clean does not pick
                        # this up. Will be also cleaned in the same function.
                        self.write_to_file('Passage: ')
                if self.tag_type == 'end':
                    self.write_to_file('\n\n')

            case 'li':
                if self.tag_type == 'start':
                    self.write_to_file('- ')
                else:
                    self.write_to_file('\n')

            # case _:
            #     # print(tag.upper())
            #     pass

    def handle_starttag(self, tag, attrs):
        # Set taf trackers
        self.tag_type = 'start'
        self.tag = tag
        self.attrs = dict(attrs)

        self.process_tag()

    def handle_endtag(self, tag):
        # print(f'End: {tag}')
        self.tag = tag
        self.tag_type = 'end'
        self.process_tag()

        # Clear tag tracker
        self.tag = None
        self.tag_type = None
        self.attrs.clear()
        self.skip_re = False

    def handle_data(self, data):
        # print(f'Data: {data!r}')

        if self.tag in ['scripref', 'h2', 'h3', 'h5']:
            return

        if data == '\n':
            return

        data = data.replace('—', '-- ')
        data = data.replace('GOD', 'God')
        data = data.replace('\n', ' ')

        self.write_to_file(data, self.skip_re)


if __name__ == '__main__':
    parser = MyHTMLParser()

    # Process each volume file.
    pbar = tqdm(total=1273)
    for vol in sorted(Path('./').glob('*.xml')):
        logger.info(vol)
        soup = BeautifulSoup(vol.read_text(), 'xml')

        # Get each book in the volume
        # This will be the main folder for all the book's chapters
        for book in soup.find_all('div1'):
            book_name = (book['title'].
                         replace('First ', '1').
                         replace('Second ', '2').
                         replace('Third ', '3')
                         )
            logger.info(book_name)

            # These are the chapters/files for each book folder
            for chapter in book.find_all('div2'):

                # For introduction files
                filename = f'MH {book_name} {chapter['title']}'

                # Remove Roman Numerals from file name
                if 'CHAPTER' in filename.upper():
                    *_, roman_num = chapter['title'].split(' ')
                    filename = f'MH {book_name} {parser.roman_to_int(roman_num)}'

                logger.info(filename)
                parser.create_md_file(base, book_name, filename)

                pbar.set_description(f"Processing: {vol.name}: {book_name}: {filename}")

                # Parse the text of the chapter
                # May need to add a loop to look in all <p class='passage> and
                # unrap any scripref that is in them. the place Dan is getting confused
                # with the book Daniel.
                for passage in chapter.find_all('p', {'class': 'passage'}):
                    # print(passage.text)
                    new_t = soup.new_tag('p', attrs=passage.attrs)
                    new_t.string = passage.text
                    passage.replace_with(new_t)

                # Clearing all scripRef of internal text. That way if it
                # had other tags in it would not be processed
                for scripture in chapter.find_all('scripRef'):
                    scripture.clear()

                for doc in chapter.children:

                    try:
                        logger.debug(f"{book_name}, {filename}")
                        parser.feed(str(doc))
                    except Exception as e:
                        logger.exception(e)
                        logger.debug(chapter.attrs)
                        raise

                parser.clean_file()
                pbar.update(1)

                # if pbar.last_print_n > 2:
                #     sys.exit()

    pbar.close()
    parser.close()