// NG2
import { Component, Input, OnChanges, SimpleChanges } from '@angular/core';

@Component({
    selector: 'button[theme]',
    host: {
        '[attr.theme]': 'theme',
        '[attr.color]': 'color',
        '[attr.icon]': 'icon',
        '[attr.loading]': 'loading'
    },
    template: `
        <!--Flex wrapper for cross-browser support-->
        <div [class]="flex">
            <!--Left Icon-->
            <i *ngIf="icon && iconClass && leftSide" [ngClass]="iconClass"></i>
            <!--Transcluded Content-->
            <ng-content></ng-content>
            <!--Right Icon-->
            <i *ngIf="icon && iconClass && rightSide" [ngClass]="iconClass"></i>
            <i *ngIf="loading" class="loading">
                <svg version="1.1"
                 xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:a="http://ns.adobe.com/AdobeSVGViewerExtensions/3.0/"
                 x="0px" y="0px" width="18.2px" height="18.5px" viewBox="0 0 18.2 18.5" style="enable-background:new 0 0 18.2 18.5;"
                 xml:space="preserve">
                <style type="text/css">
                    .spinner { fill:#FFFFFF; }
                </style>
                    <path class="spinner" d="M9.2,18.5C4.1,18.5,0,14.4,0,9.2S4.1,0,9.2,0c0.9,0,1.9,0.1,2.7,0.4c0.8,0.2,1.2,1.1,1,1.9
                        c-0.2,0.8-1.1,1.2-1.9,1C10.5,3.1,9.9,3,9.2,3C5.8,3,3,5.8,3,9.2s2.8,6.2,6.2,6.2c2.8,0,5.3-1.9,6-4.7c0.2-0.8,1-1.3,1.8-1.1
                        c0.8,0.2,1.3,1,1.1,1.8C17.1,15.7,13.4,18.5,9.2,18.5z"/>
                </svg>
            </i>
        </div>
    `
})
export class NovoButtonElement implements OnChanges {
    @Input() icon: string;
    @Input() color: string;
    @Input() side: string;
    @Input() theme: string;
    @Input() loading: boolean;

    leftSide: boolean = false;
    rightSide: boolean = true;
    iconClass: string;
    flex: string;

    ngOnChanges(changes?: SimpleChanges) {
        this.iconClass = (this.icon && !this.loading) ? `bhi-${this.icon}` : '';
        this.flex = this.theme ? 'flex-wrapper' : '';
        if (this.side !== null && this.theme !== 'primary') {
            this.leftSide = (this.side === 'left');
            this.rightSide = !this.leftSide;
        }
    }
}