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package com.oracle.truffle.js.nodes.intl;

import java.util.List;
import java.util.MissingResourceException;

import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.profiles.BranchProfile;
import com.oracle.truffle.js.nodes.JavaScriptBaseNode;
import com.oracle.truffle.js.runtime.Errors;
import com.oracle.truffle.js.runtime.JSContext;
import com.oracle.truffle.js.runtime.builtins.intl.JSDisplayNames;
import com.oracle.truffle.js.runtime.builtins.intl.JSDisplayNamesObject;
import com.oracle.truffle.js.runtime.objects.Undefined;
import com.oracle.truffle.js.runtime.util.IntlUtil;

public abstract class InitializeDisplayNamesNode extends JavaScriptBaseNode {

    private static final List TYPE_OPTION_VALUES = List.of(IntlUtil.LANGUAGE, IntlUtil.REGION, IntlUtil.SCRIPT, IntlUtil.CURRENCY, IntlUtil.CALENDAR, IntlUtil.DATE_TIME_FIELD);
    private static final List FALLBACK_OPTION_VALUES = List.of(IntlUtil.CODE, IntlUtil.NONE);
    private static final List LANGUAGE_DISPLAY_OPTION_VALUES = List.of(IntlUtil.DIALECT, IntlUtil.STANDARD);

    private final JSContext context;
    @Child JSToCanonicalizedLocaleListNode toCanonicalizedLocaleListNode;
    @Child GetOptionsObjectNode getOptionsObjectNode;
    @Child GetStringOptionNode getLocaleMatcherOption;
    @Child GetStringOptionNode getStyleOption;
    @Child GetStringOptionNode getTypeOption;
    @Child GetStringOptionNode getFallbackOption;
    @Child GetStringOptionNode getLanguageDisplayOption;
    private final BranchProfile errorBranch = BranchProfile.create();

    protected InitializeDisplayNamesNode(JSContext context) {
        this.context = context;
        this.toCanonicalizedLocaleListNode = JSToCanonicalizedLocaleListNode.create(context);
        this.getOptionsObjectNode = GetOptionsObjectNodeGen.create(context);
        this.getLocaleMatcherOption = GetStringOptionNode.create(context, IntlUtil.KEY_LOCALE_MATCHER, GetStringOptionNode.LOCALE_MATCHER_OPTION_VALUES, IntlUtil.BEST_FIT);
        this.getStyleOption = GetStringOptionNode.create(context, IntlUtil.KEY_STYLE, GetStringOptionNode.NARROW_SHORT_LONG_OPTION_VALUES, IntlUtil.LONG);
        this.getTypeOption = GetStringOptionNode.create(context, IntlUtil.KEY_TYPE, TYPE_OPTION_VALUES, null);
        this.getFallbackOption = GetStringOptionNode.create(context, IntlUtil.KEY_FALLBACK, FALLBACK_OPTION_VALUES, IntlUtil.CODE);
        this.getLanguageDisplayOption = GetStringOptionNode.create(context, IntlUtil.KEY_LANGUAGE_DISPLAY, LANGUAGE_DISPLAY_OPTION_VALUES, IntlUtil.DIALECT);
    }

    public abstract JSDisplayNamesObject executeInit(JSDisplayNamesObject displayNames, Object locales, Object options);

    public static InitializeDisplayNamesNode createInitalizeDisplayNamesNode(JSContext context) {
        return InitializeDisplayNamesNodeGen.create(context);
    }

    @Specialization
    public JSDisplayNamesObject initializeDisplayNames(JSDisplayNamesObject displayNamesObject, Object localesArg, Object optionsArg) {
        try {
            String[] locales = toCanonicalizedLocaleListNode.executeLanguageTags(localesArg);
            if (optionsArg == Undefined.instance) {
                errorBranch.enter();
                throw Errors.createTypeError("options not specified");
            }
            Object options = getOptionsObjectNode.execute(optionsArg);

            getLocaleMatcherOption.executeValue(options);
            String optStyle = getStyleOption.executeValue(options);
            String optType = getTypeOption.executeValue(options);
            if (optType == null) {
                errorBranch.enter();
                throw Errors.createTypeError("'type' option not specified");
            }
            String optFallback = getFallbackOption.executeValue(options);
            String optLanguageDisplay = getLanguageDisplayOption.executeValue(options);
            JSDisplayNames.InternalState state = displayNamesObject.getInternalState();
            JSDisplayNames.setupInternalState(context, state, locales, optStyle, optType, optFallback, optLanguageDisplay);
        } catch (MissingResourceException e) {
            errorBranch.enter();
            throw Errors.createICU4JDataError(e);
        }

        return displayNamesObject;
    }
}