#!/usr/bin/python
# -*- coding: utf-8 -*-
# ---------------------------------------------------------------------------------------------------------
# Author : Ulrich Carmesin
# Source : gitea.ucarmesin.de
# ---------------------------------------------------------------------------------------------------------
import utils.config_tool
import utils.path_const as P
import basic.constants as B
import basic.program

DEFAULT_LANGUAGE = "en"
EXP_KEY_MISSING = "key is missing {}"
EXP_KEY_DOESNT_EXIST = "key doesnt exist in domain {}"

class I18n:
    __instance = None
    cache = {}
    """
    in this class there should be managed each defined key-value-pairs
    the pairs ara loaded from the path testdata/catalog:
    * initially the csv-file catalog.csv
    * on demand other csv-files in the path
    """

    def __init__(self):
        self.cache = {}
        self.cache = utils.config_tool.getConfig(P.KEY_TOOL, "i18n")
        I18n.__instance = self
        pass


    @staticmethod
    def getInstance():
        if I18n.__instance == None:
            return I18n()
        return I18n.__instance


    def getMessage(self, job, key, args=[]):
        print("getMessage "+key+" "+str(args))
        out = self.getText(key, job)
        out = out.format(args)
        return out

    def getText(self, key, job=None):
        """
        this function gets the text depending on language which is set in job.conf
        :param key: MUST GIVEN WITH (f"{CONST=}", ..
        :return:
        return self.cache[language][key]
        """
        if job is None:
            job = basic.program.Job.getInstance()
        if "language" in job.conf.confs:
            language = job.conf.confs["language"]
        else:
            language = "en"
        if language not in self.cache:
            raise Exception(EXP_KEY_MISSING, (key))
        if "=" in key:
            out = self.extractText(key)
            key = self.extractKey(key)
        if key in self.cache[language]:
            out = self.cache[language][key]
        elif key in self.cache[DEFAULT_LANGUAGE]:
            out = self.cache[DEFAULT_LANGUAGE][key]
        return out

    def getAliasList(self, key, job=None):
        if job is None:
            jon = basic.program.Job.getInstance()
        out = []
        out.append(self.extractText(key))
        key = self.extractKey(key)
        for language in self.cache:
            if key not in self.cache[language]:
                continue
            out.append(self.cache[language][key])
        return out

    def extractKey(self, key):
        if "=" in key:
            i = key.find("=")
            x = key[0:i]
            if "." in x:
                i = x.find(".")
                y = x[i + 1:]
            else:
                y = x
            key = y
        else:
            y = key
        return key

    def extractText(self, key):
        if "=" in key:
            i = key.find("=")
            return key[i + 2:-1]
        return ""