/*
 * This file is part of Sponge, licensed under the MIT License (MIT).
 *
 * 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.spongepowered.common.service.server.permission;

import com.google.common.base.MoreObjects;
import org.spongepowered.api.SystemSubject;
import org.spongepowered.api.service.permission.PermissionService;
import org.spongepowered.api.service.permission.Subject;
import org.spongepowered.api.service.permission.SubjectReference;
import org.spongepowered.api.util.Tristate;
import org.spongepowered.common.bridge.permissions.SubjectBridge;

import java.util.Optional;
import java.util.concurrent.CompletableFuture;

public abstract class SpongeSystemSubject implements Subject, SystemSubject, BridgeSubject, SubjectBridge {
    private SubjectReference impl$subjectReference;

    @Override
    public void bridge$setSubject(final SubjectReference subj) {
      this.impl$subjectReference = subj;
    }

    @Override
    public Optional<SubjectReference> bridge$resolveReferenceOptional() {
        if (this.impl$subjectReference == null) {
            SubjectHelper.applySubject(this, PermissionService.SUBJECTS_SYSTEM);
        }
        return Optional.ofNullable(this.impl$subjectReference);
    }

    @Override
    public Optional<Subject> bridge$resolveOptional() {
        return this.bridge$resolveReferenceOptional().map(SubjectReference::resolve).map(CompletableFuture::join);
    }

    @Override
    public Subject bridge$resolve() {
        return this.bridge$resolveOptional()
            .orElseThrow(() -> new IllegalStateException("No subject reference present for subject " + this));
    }

    @Override
    public String bridge$getSubjectCollectionIdentifier() {
        return PermissionService.SUBJECTS_SYSTEM;
    }

    @Override
    public Tristate bridge$permDefault(final String permission) {
        return Tristate.TRUE;
    }

    @Override
    public String toString() {
      return MoreObjects.toStringHelper(this)
          .add("identifier", this.identifier())
          .add("reference", this.bridge$resolveOptional())
          .toString();
    }
}
