/*!
 * @license
 * Copyright 2019 Alfresco Software, Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { Component, ViewEncapsulation, Input, OnInit, EventEmitter, Output } from '@angular/core';
import { NodesApiService } from '@alfresco/adf-core';
import { Node, PermissionElement } from '@alfresco/js-api';
import { PermissionDisplayModel } from '../../models/permission.model';
import { NodePermissionService } from '../../services/node-permission.service';

@Component({
    selector: 'adf-permission-list',
    templateUrl: './permission-list.component.html',
    styleUrls: ['./permission-list.component.scss'],
    encapsulation: ViewEncapsulation.None
})
export class PermissionListComponent implements OnInit {

    /** ID of the node whose permissions you want to show. */
    @Input()
    nodeId: string = '';

    /** Emitted when the permission is updated. */
    @Output()
    update: EventEmitter<PermissionElement> = new EventEmitter();

    /** Emitted when an error occurs. */
    @Output()
    error: EventEmitter<any> = new EventEmitter();

    permissionList: PermissionDisplayModel[];
    settableRoles: any[];
    actualNode: Node;

    constructor(private nodeService: NodesApiService,
                private nodePermissionService: NodePermissionService) {

    }

    ngOnInit() {
        this.fetchNodePermissions();
    }

    reload() {
        this.fetchNodePermissions();
    }

    private fetchNodePermissions() {
        this.nodeService.getNode(this.nodeId).subscribe((node: Node) => {
            this.actualNode = node;
            this.permissionList = this.getPermissionList(node);

            this.nodePermissionService.getNodeRoles(node).subscribe((settableList: string[]) => {
                this.settableRoles = settableList;
            });
        });
    }

    private getPermissionList(node: Node): PermissionDisplayModel[] {
        const allPermissions: PermissionDisplayModel[] = [];
        if (node.permissions.locallySet) {
            node.permissions.locallySet.map((permissionElement: PermissionElement) => {
                const permission = new PermissionDisplayModel(permissionElement);
                allPermissions.push(permission);
            });
        }
        if (node.permissions.inherited) {
            node.permissions.inherited.map((permissionElement: PermissionElement) => {
                const permissionInherited = new PermissionDisplayModel(permissionElement);
                permissionInherited.isInherited = true;
                allPermissions.push(permissionInherited);
            });
        }
        return allPermissions;
    }

    saveNewRole(event: any, permissionRow: PermissionDisplayModel) {
        const updatedPermissionRole: PermissionElement = this.buildUpdatedPermission(event.value, permissionRow);
        this.nodePermissionService.updatePermissionRole(this.actualNode, updatedPermissionRole)
            .subscribe(() => {
                this.update.emit(updatedPermissionRole);
            });
    }

    private buildUpdatedPermission(newRole: string, permissionRow: PermissionDisplayModel): PermissionElement {
        const permissionRole: PermissionElement = {};
        permissionRole.accessStatus = permissionRow.accessStatus;
        permissionRole.name = newRole;
        permissionRole.authorityId = permissionRow.authorityId;
        return permissionRole;
    }

    removePermission(permissionRow: PermissionDisplayModel) {
        this.nodePermissionService
            .removePermission(this.actualNode, permissionRow)
            .subscribe(
                node => this.update.emit(node),
                error => this.error.emit(error)
            );
    }

}