import {
    Directive,
    EventEmitter,
    Input,
    Output,
} from '@angular/core';

import { CipherType } from 'jslib-common/enums/cipherType';

import { CollectionView } from 'jslib-common/models/view/collectionView';
import { FolderView } from 'jslib-common/models/view/folderView';

import { TreeNode } from 'jslib-common/models/domain/treeNode';

import { CollectionService } from 'jslib-common/abstractions/collection.service';
import { FolderService } from 'jslib-common/abstractions/folder.service';
import { StorageService } from 'jslib-common/abstractions/storage.service';
import { UserService } from 'jslib-common/abstractions/user.service';

import { ConstantsService } from 'jslib-common/services/constants.service';

@Directive()
export class GroupingsComponent {
    @Input() showFolders = true;
    @Input() showCollections = true;
    @Input() showFavorites = true;
    @Input() showTrash = true;

    @Output() onAllClicked = new EventEmitter();
    @Output() onFavoritesClicked = new EventEmitter();
    @Output() onTrashClicked = new EventEmitter();
    @Output() onCipherTypeClicked = new EventEmitter<CipherType>();
    @Output() onFolderClicked = new EventEmitter<FolderView>();
    @Output() onAddFolder = new EventEmitter();
    @Output() onEditFolder = new EventEmitter<FolderView>();
    @Output() onCollectionClicked = new EventEmitter<CollectionView>();

    folders: FolderView[];
    nestedFolders: TreeNode<FolderView>[];
    collections: CollectionView[];
    nestedCollections: TreeNode<CollectionView>[];
    loaded: boolean = false;
    cipherType = CipherType;
    selectedAll: boolean = false;
    selectedFavorites: boolean = false;
    selectedTrash: boolean = false;
    selectedType: CipherType = null;
    selectedFolder: boolean = false;
    selectedFolderId: string = null;
    selectedCollectionId: string = null;

    private collapsedGroupings: Set<string>;
    private collapsedGroupingsKey: string;

    constructor(protected collectionService: CollectionService, protected folderService: FolderService,
        protected storageService: StorageService, protected userService: UserService) { }

    async load(setLoaded = true) {
        const userId = await this.userService.getUserId();
        this.collapsedGroupingsKey = ConstantsService.collapsedGroupingsKey + '_' + userId;
        const collapsedGroupings = await this.storageService.get<string[]>(this.collapsedGroupingsKey);
        if (collapsedGroupings == null) {
            this.collapsedGroupings = new Set<string>();
        } else {
            this.collapsedGroupings = new Set(collapsedGroupings);
        }

        await this.loadFolders();
        await this.loadCollections();

        if (setLoaded) {
            this.loaded = true;
        }
    }

    async loadCollections(organizationId?: string) {
        if (!this.showCollections) {
            return;
        }
        const collections = await this.collectionService.getAllDecrypted();
        if (organizationId != null) {
            this.collections = collections.filter(c => c.organizationId === organizationId);
        } else {
            this.collections = collections;
        }
        this.nestedCollections = await this.collectionService.getAllNested(this.collections);
    }

    async loadFolders() {
        if (!this.showFolders) {
            return;
        }
        this.folders = await this.folderService.getAllDecrypted();
        this.nestedFolders = await this.folderService.getAllNested();
    }

    selectAll() {
        this.clearSelections();
        this.selectedAll = true;
        this.onAllClicked.emit();
    }

    selectFavorites() {
        this.clearSelections();
        this.selectedFavorites = true;
        this.onFavoritesClicked.emit();
    }

    selectTrash() {
        this.clearSelections();
        this.selectedTrash = true;
        this.onTrashClicked.emit();
    }

    selectType(type: CipherType) {
        this.clearSelections();
        this.selectedType = type;
        this.onCipherTypeClicked.emit(type);
    }

    selectFolder(folder: FolderView) {
        this.clearSelections();
        this.selectedFolder = true;
        this.selectedFolderId = folder.id;
        this.onFolderClicked.emit(folder);
    }

    addFolder() {
        this.onAddFolder.emit();
    }

    editFolder(folder: FolderView) {
        this.onEditFolder.emit(folder);
    }

    selectCollection(collection: CollectionView) {
        this.clearSelections();
        this.selectedCollectionId = collection.id;
        this.onCollectionClicked.emit(collection);
    }

    clearSelections() {
        this.selectedAll = false;
        this.selectedFavorites = false;
        this.selectedTrash = false;
        this.selectedType = null;
        this.selectedFolder = false;
        this.selectedFolderId = null;
        this.selectedCollectionId = null;
    }

    collapse(grouping: FolderView | CollectionView, idPrefix = '') {
        if (grouping.id == null) {
            return;
        }
        const id = idPrefix + grouping.id;
        if (this.isCollapsed(grouping, idPrefix)) {
            this.collapsedGroupings.delete(id);
        } else {
            this.collapsedGroupings.add(id);
        }
        this.storageService.save(this.collapsedGroupingsKey, this.collapsedGroupings);
    }

    isCollapsed(grouping: FolderView | CollectionView, idPrefix = '') {
        return this.collapsedGroupings.has(idPrefix + grouping.id);
    }
}