#!/usr/bin/env python3
"""
Generate an i18n file from a given script.

run IDLE at topmost level:

>>> import pwb
>>> from scripts.maintenance.make_i18n_dict import i18nBot
>>> bot = i18nBot('<scriptname>', '<msg dict>')
>>> bot.run()

If you have more than one message dictionary, give all these names to the bot:

>>> bot = i18nBot('<scriptname>', '<msg dict1>', '<msg dict2>', '<msg dict3>')

If you want to rename the message index use keyword arguments. This may be
mixed with preleading positonal arguments:

>>> bot = i18nBot('<scriptname>', '<msg dict1>', the_other_msg='<msg dict2>')

If you have the messages as instance constants you may call the bot as follows:

>>> bot = i18nBot('<scriptname>.<class name>', '<msg dict1>', '<msg dict2>')

It's also possible to make json files too by using to_json method after
instantiating the bot. It also calls ``bot.run()`` to create the dictionaries:

>>> bot.to_json()
"""
#
# (C) Pywikibot team, 2013-2023
#
# Distributed under the terms of the MIT license.
#
import codecs
import json
import os
from importlib import import_module

from pywikibot import config


class i18nBot:  # noqa: N801

    """I18n bot."""

    def __init__(self, script, *args, **kwargs):
        """Initializer."""
        modules = script.split('.')
        self.scriptname = modules[0]
        self.script = import_module('scripts.' + self.scriptname)
        for m in modules:
            self.script = getattr(self.script, m)
        self.messages = {}
        # setup the message dict
        for msg in args:
            if hasattr(self.script, msg):
                self.messages[msg] = msg
            else:
                print(f'message {msg} not found')
        for new, old in kwargs.items():
            self.messages[old] = new.replace('_', '-')
        self.dict = {}

    def print_all(self):
        """Pretty print the dict as a file content to screen."""
        if not self.dict:
            print('No messages found, read them first.\n'
                  'Use "run" or "to_json" methods')
            return
        keys = list(self.dict.keys())
        keys.remove('qqq')
        keys.sort()
        keys.insert(0, 'qqq')
        if 'en' in keys:
            keys.remove('en')
            keys.insert(0, 'en')

        print('msg = {')
        for code in keys:
            print(f"    '{code}': {{")
            for msg in sorted(self.messages.values()):
                label = f'{self.scriptname}-{msg}'
                if label in self.dict[code]:
                    print(f"        '{label}': '{self.dict[code][label]}',")
            print('    },')
        print('};')

    def read(self, oldmsg, newmsg=None):
        """Read a single message from source script."""
        msg = getattr(self.script, oldmsg)
        keys = list(msg.keys())
        keys.append('qqq')
        if newmsg is None:
            newmsg = oldmsg
        for code in keys:
            label = f'{self.scriptname}-{newmsg}'
            if code == 'qqq':
                if code not in self.dict:
                    self.dict[code] = {}
                self.dict[code][label] = (f'Edit summary for message {newmsg} '
                                          f'of {self.scriptname} report')
            elif code != 'commons':
                if code not in self.dict:
                    self.dict[code] = {}
                self.dict[code][label] = msg[code]
        if 'en' not in keys:
            print('WARNING: "en" key missing for message ' + newmsg)

    def run(self, quiet=False):
        """
        Run the bot, read the messages from source and print the dict.

        :param quiet: print the result if False
        :type quiet: bool
        """
        for item in self.messages.items():
            self.read(*item)
        if not quiet:
            self.print_all()

    def to_json(self, quiet=True):
        """
        Run the bot and create json files.

        :param quiet: Print the result if False
        :type quiet: bool
        """
        indent = 4

        if not self.dict:
            self.run(quiet)
        json_dir = os.path.join(
            config.base_dir, 'scripts/i18n', self.scriptname)
        if not os.path.exists(json_dir):
            os.makedirs(json_dir)
        for lang in self.dict:
            file_name = os.path.join(json_dir, f'{lang}.json')
            if os.path.isfile(file_name):
                with codecs.open(file_name, 'r', 'utf-8') as json_file:
                    new_dict = json.load(json_file)
            else:
                new_dict = {}
            new_dict['@metadata'] = new_dict.get('@metadata', {'authors': []})
            with codecs.open(file_name, 'w', 'utf-8') as json_file:
                new_dict.update(self.dict[lang])
                s = json.dumps(new_dict, ensure_ascii=False, sort_keys=True,
                               indent=indent, separators=(',', ': '))
                s = s.replace(' ' * indent, '\t')
                json_file.write(s)


if __name__ == '__main__':
    print(__doc__)
