/*
 * This file is part of LanternServer, licensed under the MIT License (MIT).
 *
 * Copyright (c) LanternPowered <https://www.lanternpowered.org>
 * Copyright (c) SpongePowered <https://www.spongepowered.org>
 * Copyright (c) contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the Software), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.lanternpowered.server.service.permission.base;

import org.lanternpowered.server.service.permission.LanternPermissionService;
import org.spongepowered.api.service.context.Context;
import org.spongepowered.api.service.permission.Subject;
import org.spongepowered.api.service.permission.SubjectCollection;
import org.spongepowered.api.util.Tristate;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

public abstract class LanternSubjectCollection implements SubjectCollection {

    private final String identifier;
    protected final LanternPermissionService service;

    protected LanternSubjectCollection(String identifier, LanternPermissionService service) {
        this.identifier = identifier;
        this.service = service;
    }

    @Override
    public String getIdentifier() {
        return this.identifier;
    }

    @Override
    public LanternSubject getDefaults() {
        return this.service.getDefaultCollection().get(this.getIdentifier());
    }

    @Override
    public Map<Subject, Boolean> getAllWithPermission(String permission) {
        final Map<Subject, Boolean> ret = new HashMap<>();
        for (Subject subj : getAllSubjects()) {
            Tristate state = subj.getPermissionValue(subj.getActiveContexts(), permission);
            if (state != Tristate.UNDEFINED) {
                ret.put(subj, state.asBoolean());
            }
        }
        return Collections.unmodifiableMap(ret);
    }

    @Override
    public Map<Subject, Boolean> getAllWithPermission(Set<Context> contexts, String permission) {
        final Map<Subject, Boolean> ret = new HashMap<>();
        for (Subject subj : getAllSubjects()) {
            Tristate state = subj.getPermissionValue(contexts, permission);
            if (state != Tristate.UNDEFINED) {
                ret.put(subj, state.asBoolean());
            }
        }
        return Collections.unmodifiableMap(ret);
    }

    public LanternPermissionService getService() {
        return this.service;
    }

    /**
     * Returns the subject specified. Will not return null.
     *
     * @param identifier The identifier to look up a subject by.
     *                   Case-insensitive
     * @return A stored subject if present, otherwise a subject that may be
     * stored if data is changed from defaults
     */
    @Override
    public abstract LanternSubject get(String identifier);

}