// NG2
import { Injectable } from '@angular/core';
// APP
import { NovoToastElement } from './Toast';
import { ComponentUtils } from '../../utils/component-utils/ComponentUtils';

@Injectable()
export class NovoToastService {
    _parentViewContainer: any;
    references: Array<any> = [];
    themes: Array<string> = [
        'default',
        'success',
        'info',
        'warning',
        'danger'
    ];
    icons: any = {
        default: 'bell',
        success: 'check',
        info: 'info',
        warning: 'warning',
        danger: 'remove'
    };
    defaults: any = {
        hideDelay: 3500,
        position: 'growlTopRight',
        theme: 'default'
    };

    constructor(private componentUtils: ComponentUtils) {
    }

    set parentViewContainer(view) {
        this._parentViewContainer = view;
    }

    alert(options) {
        return new Promise((resolve) => {
            if (!this._parentViewContainer) {
                console.error('No parent view container specified for the ToastService. Set it inside your main application. \nthis.toastService.parentViewContainer = view (ViewContainerRef)');
                return;
            }
            let toast = this.componentUtils.appendNextToLocation(NovoToastElement, this._parentViewContainer);
            this.references.push(toast);
            this.handleAlert(toast.instance, options);
            resolve(toast);
        });
    }

    isVisible(toast) {
        return toast.show;
    }

    hide(toast) {
        toast.animate = false;
        setTimeout(() => {
            toast.show = false;
            const REF = this.references.filter(x => x.instance === toast)[0];
            if (REF) {
                this.references.splice(this.references.indexOf(REF), 1);
                REF.destroy();
            }
        }, 300);
    }

    handleAlert(toast, options) {
        this.setToastOnSession(toast, options);
        setTimeout(() => {
            this.show(toast);
        }, 20);
        if (!toast.isCloseable) {
            this.toastTimer(toast);
        }

    }

    setToastOnSession(toast, opts) {
        const OPTIONS = (typeof opts === 'object') ? opts : {};

        toast.parent = this;
        toast.title = OPTIONS.title || '';
        toast.message = OPTIONS.message || '';
        toast.hideDelay = OPTIONS.hideDelay || this.defaults.hideDelay;
        toast.link = OPTIONS.link || '';
        toast.isCloseable = OPTIONS.isCloseable || false;

        const CUSTOM_CLASS = OPTIONS.customClass || '';
        const ALERT_STYLE = OPTIONS.theme || this.defaults.theme;
        const ALERT_POSITION = OPTIONS.position || this.defaults.position;
        const ALERT_ICON = OPTIONS.icon || this.icons.default;

        toast.iconClass = `bhi-${ALERT_ICON}`;
        toast.launched = true;
        toast.alertTheme = `${ALERT_STYLE} ${ALERT_POSITION} ${CUSTOM_CLASS} toast-container launched`;
    }

    show(toast) {
        toast.show = true;
        setTimeout(addClass, 25);
        /**
         * Adds animate class to be called after a timeout
         **/
        function addClass() {
            toast.animate = true;
        }
    }

    toastTimer(toast) {
        if (toast.hideDelay < 0) {
            return;
        }
        setTimeout(() => {
            this.hide(toast);
        }, toast.hideDelay);
    }
}