/*!
 * @license
 * Alfresco Example Content Application
 *
 * Copyright (C) 2005 - 2018 Alfresco Software Limited
 *
 * This file is part of the Alfresco Example Content Application.
 * If the software was purchased under a paid Alfresco license, the terms of
 * the paid license agreement will prevail.  Otherwise, the software is
 * provided under the following open source license terms:
 *
 * The Alfresco Example Content Application is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * The Alfresco Example Content Application is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
 */

import { FileUploadEvent, UploadService } from '@alfresco/adf-core';
import { Component, OnDestroy, OnInit } from '@angular/core';
import { ActivatedRoute, Params, Router } from '@angular/router';
import { Store } from '@ngrx/store';
import { MinimalNodeEntity, MinimalNodeEntryEntity, NodePaging, PathElement, PathElementEntity } from 'alfresco-js-api';
import { Observable } from 'rxjs/Rx';
import { ContentManagementService } from '../../services/content-management.service';
import { NodeActionsService } from '../../services/node-actions.service';
import { AppStore } from '../../store/states/app.state';
import { PageComponent } from '../page.component';
import { ContentApiService } from '../../services/content-api.service';
import { ExtensionService } from '../../extensions/extension.service';
import { SetCurrentFolderAction } from '../../store/actions';

@Component({
    templateUrl: './files.component.html'
})
export class FilesComponent extends PageComponent implements OnInit, OnDestroy {

    isValidPath = true;

    private nodePath: PathElement[];

    constructor(private router: Router,
                private route: ActivatedRoute,
                private contentApi: ContentApiService,
                store: Store<AppStore>,
                private nodeActionsService: NodeActionsService,
                private uploadService: UploadService,
                content: ContentManagementService,
                extensions: ExtensionService) {
        super(store, extensions, content);
    }

    ngOnInit() {
        super.ngOnInit();

        const { route, content, nodeActionsService, uploadService } = this;
        const { data } = route.snapshot;

        this.title = data.title;

        route.params.subscribe(({ folderId }: Params) => {
            const nodeId = folderId || data.defaultNodeId;

            this.contentApi.getNode(nodeId)
                .map(node => node.entry)
                .do(node => {
                    if (node.isFolder) {
                        this.updateCurrentNode(node);
                    } else {
                        this.router.navigate(['/personal-files', node.parentId], { replaceUrl: true });
                    }
                })
                .skipWhile(node => !node.isFolder)
                .flatMap(node => this.fetchNodes(node.id))
                .subscribe(
                    () => this.isValidPath = true,
                    () => this.isValidPath = false
                );
        });

        this.subscriptions = this.subscriptions.concat([
            nodeActionsService.contentCopied.subscribe((nodes) => this.onContentCopied(nodes)),
            content.folderCreated.subscribe(() => this.documentList.reload()),
            content.folderEdited.subscribe(() => this.documentList.reload()),
            content.nodesDeleted.subscribe(() => this.documentList.reload()),
            content.nodesMoved.subscribe(() => this.documentList.reload()),
            content.nodesRestored.subscribe(() => this.documentList.reload()),
            uploadService.fileUploadComplete.debounceTime(300).subscribe(file => this.onFileUploadedEvent(file)),
            uploadService.fileUploadDeleted.debounceTime(300).subscribe((file) => this.onFileUploadedEvent(file)),
        ]);
    }

    ngOnDestroy() {
        super.ngOnDestroy();
        this.store.dispatch(new SetCurrentFolderAction(null));
    }

    fetchNodes(parentNodeId?: string): Observable<NodePaging> {
       return this.contentApi.getNodeChildren(parentNodeId);
    }

    navigate(nodeId: string = null) {
        const commands = [ './' ];

        if (nodeId && !this.isRootNode(nodeId)) {
            commands.push(nodeId);
        }

        this.router.navigate(commands, {
            relativeTo: this.route.parent
        });
    }

    navigateTo(node: MinimalNodeEntity) {
        if (node && node.entry) {
            const { id, isFolder } = node.entry;

            if (isFolder) {
                this.navigate(id);
                return;
            }

            if (PageComponent.isLockedNode(node.entry)) {
                event.preventDefault();
                return;
            }

            this.showPreview(node);
        }
    }

    onBreadcrumbNavigate(route: PathElementEntity) {
        // todo: review this approach once 5.2.3 is out
        if (this.nodePath && this.nodePath.length > 2) {
            if (this.nodePath[1].name === 'Sites' && this.nodePath[2].id === route.id) {
                return this.navigate(this.nodePath[3].id);
            }
        }
        this.navigate(route.id);
    }

    onFileUploadedEvent(event: FileUploadEvent) {
        const node: MinimalNodeEntity = event.file.data;

        // check root and child nodes
        if (node && node.entry && node.entry.parentId === this.getParentNodeId()) {
            this.documentList.reload();
            return;
        }

        // check the child nodes to show dropped folder
        if (event && event.file.options.parentId === this.getParentNodeId()) {
            this.displayFolderParent(event.file.options.path, 0);
            return;
        }

        if (event && event.file.options.parentId) {
            if (this.nodePath) {
                const correspondingNodePath = this.nodePath.find(pathItem => pathItem.id === event.file.options.parentId);

                // check if the current folder has the 'trigger-upload-folder' as one of its parents
                if (correspondingNodePath) {
                    const correspondingIndex = this.nodePath.length - this.nodePath.indexOf(correspondingNodePath);
                    this.displayFolderParent(event.file.options.path, correspondingIndex);
                }
            }
        }
    }

    displayFolderParent(filePath = '', index) {
        const parentName = filePath.split('/')[index];
        const currentFoldersDisplayed: any = this.documentList.data.getRows() || [];

        const alreadyDisplayedParentFolder = currentFoldersDisplayed.find(
            row => row.node.entry.isFolder && row.node.entry.name === parentName);

        if (alreadyDisplayedParentFolder) {
            return;
        }
        this.documentList.reload();
    }

    onContentCopied(nodes: MinimalNodeEntity[]) {
        const newNode = nodes
            .find((node) => {
                return node && node.entry && node.entry.parentId === this.getParentNodeId();
            });
        if (newNode) {
            this.documentList.reload();
        }
    }

    // todo: review this approach once 5.2.3 is out
    private async updateCurrentNode(node: MinimalNodeEntryEntity) {
        this.nodePath = null;

        if (node && node.path && node.path.elements) {
            const elements = node.path.elements;

            this.nodePath = elements.map(pathElement => {
                return Object.assign({}, pathElement);
            });

            if (elements.length > 1) {
                if (elements[1].name === 'User Homes') {
                    elements.splice(0, 2);
                } else if (elements[1].name === 'Sites') {
                    await this.normalizeSitePath(node);
                }
            }
        }

        this.node = node;
        this.store.dispatch(new SetCurrentFolderAction(node));
    }

    // todo: review this approach once 5.2.3 is out
    private async normalizeSitePath(node: MinimalNodeEntryEntity) {
        const elements = node.path.elements;

        // remove 'Sites'
        elements.splice(1, 1);

        if (this.isSiteContainer(node)) {
            // rename 'documentLibrary' entry to the target site display name
            // clicking on the breadcrumb entry loads the site content
            const parentNode = await this.contentApi.getNodeInfo(node.parentId).toPromise();
            node.name = parentNode.properties['cm:title'] || parentNode.name;

            // remove the site entry
            elements.splice(1, 1);
        } else {
            // remove 'documentLibrary' in the middle of the path
            const docLib = elements.findIndex(el => el.name === 'documentLibrary');
            if (docLib > -1) {
                const siteFragment = elements[docLib - 1];
                const siteNode = await this.contentApi.getNodeInfo(siteFragment.id).toPromise();

                // apply Site Name to the parent fragment
                siteFragment.name = siteNode.properties['cm:title'] || siteNode.name;
                elements.splice(docLib, 1);
            }
        }
    }

    isSiteContainer(node: MinimalNodeEntryEntity): boolean {
        if (node && node.aspectNames && node.aspectNames.length > 0) {
            return node.aspectNames.indexOf('st:siteContainer') >= 0;
        }
        return false;
    }

    isRootNode(nodeId: string): boolean {
        if (this.node && this.node.path && this.node.path.elements && this.node.path.elements.length > 0) {
            return this.node.path.elements[0].id === nodeId;
        }
        return false;
    }
}