import { Injectable } from '@angular/core';
import { Storage } from '@ionic/storage';

declare var _: any;

@Injectable()
export class LocalStorageHelper {
	constructor(
		public storage: Storage
	){}

	db: any = {
		cases: [],

		caseNotes: [],
		caseSessions: [],
		caseInvoices: [],
		caseTimeline: [],

		therapists: [],
		status: [],
		specialties: [],
		profile: {},
	};

	loadDb(cb){
        var i = 1;

		this.storage.get("db").then(
			(db) => {
				if(db){
					this.db = db;
				}

				cb()
			}
		)
	}

	saveDb(){
		this.storage.set("db", this.db)
	}

	newId() {
	  function s4() {
	    return Math.floor((1 + Math.random()) * 0x10000)
	      .toString(16)
	      .substring(1);
	  }
	  return s4() + s4() + '-' + s4() + '-' + s4() + '-' +
	    s4() + '-' + s4() + s4() + s4();
	}

	addItemToList(listName, item, noId){
		if(noId!=true){
			item.Id = this.newId();
		}

		if(!this.db[listName]){
			this.db[listName] = [];
		}

		this.db[listName].push(item);

		this.saveDb();
	}

	updateItemToList(listName, item){
		for (var i = this.db[listName].length - 1; i >= 0; i--) {
			if(this.db[listName][i].Id==item.Id){
				Object.assign(this.db[listName][i], item);
				break;
			}
		}

		this.saveDb();
	}

	saveItem(listName, item){
		this.db[listName] = item

		this.saveDb();
	}

	getItemFromList(listName, id){
		return _.find(this.db[listName], {Id: id});
	}

	getListByParams(listName, params){
		return _.find(this.db[listName], params);
	}

	getList(listName){
		return this.db[listName];
	}

	getListItemsByParams(listName, params){
		return _.filter(this.db[listName], (i)=> {
	        return i[params.field] == params.value;
	    });
	}

	deleteItemFromList(listName, id){
		for (var i = this.db[listName].length - 1; i >= 0; i--) {
			if(this.db[listName][i].Id==id){
				this.db[listName].splice(i, 1);

				break;
			}
		}

		this.saveDb()
	}
}