# -*- coding: utf-8 -*-

# Copyright (c) 2014 - 2023 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Package containing the various translation engines.
"""

import contextlib
import importlib
import os

from PyQt6.QtCore import QCoreApplication
from PyQt6.QtGui import QIcon

from eric7.EricGui import EricPixmapCache
from eric7.EricWidgets.EricApplication import ericApp

# TODO: add interface to 'Libre Translate'


def supportedEngineNames():
    """
    Module function to get the list of supported translation engines.

    @return names of supported engines
    @rtype list of str
    """
    return [
        "deepl",
        "googlev1",
        "googlev2",
        "ibm_watson",
        "microsoft",
        "mymemory",
        "yandex",
    ]


def engineDisplayName(name):
    """
    Module function to get a translated name for an engine.

    @param name name of a translation engine
    @type str
    @return translated engine name
    @rtype str
    """
    return {
        "deepl": QCoreApplication.translate("TranslatorEngines", "DeepL"),
        "googlev1": QCoreApplication.translate("TranslatorEngines", "Google V.1"),
        "googlev2": QCoreApplication.translate("TranslatorEngines", "Google V.2"),
        "ibm_watson": QCoreApplication.translate("TranslatorEngines", "IBM Watson"),
        "microsoft": QCoreApplication.translate("TranslatorEngines", "Microsoft"),
        "mymemory": QCoreApplication.translate("TranslatorEngines", "MyMemory"),
        "yandex": QCoreApplication.translate("TranslatorEngines", "Yandex"),
    }.get(
        name,
        QCoreApplication.translate(
            "TranslatorEngines", "Unknow translation service name ({0})"
        ).format(name),
    )


def getTranslationEngine(name, plugin, parent=None):
    """
    Module function to instantiate an engine object for the named service.

    @param name name of the online translation service
    @type str
    @param plugin reference to the plugin object
    @type TranslatorPlugin
    @param parent reference to the parent object
    @type QObject
    @return translation engine
    @rtype TranslatorEngine
    """
    engineMapping = {
        "deepl": ".DeepLEngine",
        "googlev1": ".GoogleV1Engine",
        "googlev2": ".GoogleV2Engine",
        "ibm_watson": ".IbmWatsonEngine",
        "microsoft": ".MicrosoftEngine",
        "mymemory": ".MyMemoryEngine",
        "yandex": ".YandexEngine",
    }

    with contextlib.suppress(KeyError):
        mod = importlib.import_module(engineMapping[name], __package__)
        if mod:
            return mod.createEngine(plugin, parent)

    return None


def getEngineIcon(name):
    """
    Module function to get the icon of the named engine.

    @param name name of the translation engine
    @type str
    @return engine icon
    @rtype QIcon
    """
    iconSuffix = "dark" if ericApp().usesDarkPalette() else "light"
    if name in supportedEngineNames():
        icon = EricPixmapCache.getIcon(
            os.path.join(
                os.path.dirname(__file__),
                "..",
                "icons",
                "engines",
                "{0}-{1}".format(name, iconSuffix),
            )
        )
        if icon.isNull():
            # try variant without suffix
            icon = EricPixmapCache.getIcon(
                os.path.join(
                    os.path.dirname(__file__),
                    "..",
                    "icons",
                    "engines",
                    "{0}".format(name),
                )
            )
        return icon
    else:
        return QIcon()


def getKeyUrl(name):
    """
    Module function to get an URL to request a user key.

    @param name name of the online translation service
    @type str
    @return key request URL
    @rtype str
    """
    return {
        "deepl": "https://www.deepl.com/de/pro-api",
        "googlev2": "https://console.developers.google.com/",
        "ibm_watson": "https://www.ibm.com/watson/services/language-translator/",
        "microsoft": "https://portal.azure.com",
        "mymemory": "http://mymemory.translated.net/doc/keygen.php",
        "yandex": "http://api.yandex.com/key/form.xml?service=trnsl",
    }.get(name, "")
