#!/usr/bin/env python3

import argparse
import datetime
from xml.etree import ElementTree
import zipfile

import lesana


NS = {'tellico': 'http://periapsis.org/tellico/'}

# https://docs.kde.org/trunk5/en/extragear-office/tellico/field-type-values.html
F_TYPE_MAP = {
    '0': 'string',  # not in the specs, but seen in the wild
    '1': 'string',
    '2': 'text',
    '3': 'string',
    '4': 'bool',
    '6': 'integer',
    '7': 'url',
    '8': 'list',  # single column table
    '10': 'file',
    '12': 'timestamp',  # date
    '14': 'integer',  # rating
}


class T2L:
    """
    Manage collections
    """

    arguments = [
        (
            ['-c', '--collection'],
            dict(
                help='Name of the new lesana collection.' +
                ' Default is <tellico file base name>.lesana',
                default=None,
            ),
        ),
        (['file'], dict(help='Tellico file to convert to lesana.',)),
    ]

    def _load_args(self):
        self.parser = argparse.ArgumentParser()
        for arg in self.arguments:
            self.parser.add_argument(*arg[0], **arg[1])
        self.args = self.parser.parse_args()

    def read_field_data(self, xfield):
        if xfield.tag in self.date_fields:
            for child in xfield:
                if 'year' in child.tag:
                    year = child.text
                elif 'month' in child.tag:
                    month = child.text
                elif 'day' in child.tag:
                    day = child.text
            try:
                data = datetime.date(int(year), int(month), int(day))
            except ValueError:
                data = None
        elif xfield.iter().__next__():
            data = []
            for child in xfield:
                data.append(self.read_field_data(child))
        else:
            data = xfield.text
        return data

    def main(self):
        self._load_args()
        with zipfile.ZipFile(self.args.file, 'r') as zp:
            tree = ElementTree.parse(zp.open('tellico.xml'))
        # open collection
        xml_collection = tree.getroot().find('tellico:collection', NS)

        # get collection settings
        title = xml_collection.attrib['title']
        xml_fields = xml_collection.find('tellico:fields', NS)
        self.date_fields = []
        fields = []
        for xf in xml_fields:
            if xf.attrib['type'] == '12':
                self.date_fields.append(
                    '{' + NS['tellico'] + '}' + xf.attrib['name']
                )
            f_type = F_TYPE_MAP.get(xf.attrib['type'])
            # TODO: support fields with the multiple values flag
            # (they should probably become lists)
            try:
                flags = int(xf.attrib['flags'])
            except ValueError:
                flags = 0
            if flags % 2 == 1:
                l_type = f_type
                f_type = 'list'
                plural = 's'
            else:
                l_type = None
                plural = ''
            field = {
                'name': xf.attrib['name'] + plural,
                'type': f_type,
                'help': xf.attrib['title'],
            }
            if l_type:
                field['list'] = l_type
            fields.append(field)
        # Create a collection with the settings we have loaded
        directory = self.args.collection or self.args.file.replace(
            '.tc', '.lesana'
        )
        self.collection = lesana.collection.Collection.init(
            directory=directory,
            git_enabled=False,
            settings={'name': title, 'fields': fields,},
        )

        # import data
        for xe in xml_collection.findall('tellico:entry', NS):
            data = {'eid': xe.attrib['id']}
            for xfield in xe.getchildren():
                field_name = xfield.tag.replace('{' + NS['tellico'] + '}', '')
                data[field_name] = self.read_field_data(xfield)
            new_entry = lesana.collection.Entry(self.collection, data=data)
            self.collection.save_entries([new_entry])
        self.collection.update_cache()


if __name__ == '__main__':
    T2L().main()