import { Injectable, Inject, Component } from '@angular/core';
import { Browser } from './Browser';


/**
 * 
 * 提供行內資訊系統共用的服務函式，可減少程式開發時間
 * 
 * @author:GYC
 */
@Injectable()
export class EsbService {

    /**
     * detect IE
     * returns version of IE or false, if browser is not Internet Explorer
     */
    detectIE() {
        let ua = window.navigator.userAgent;

        // Test values; Uncomment to check result …

        // IE 10
        // ua = 'Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; Trident/6.0)';

        // IE 11
        // ua = 'Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko';

        // Edge 12 (Spartan)
        // ua = 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.71 Safari/537.36 Edge/12.0';

        // Edge 13
        // ua = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2486.0 Safari/537.36 Edge/13.10586';

        let msie = ua.indexOf('MSIE ');
        if (msie > 0) {
            // IE 10 or older => return version number
            return parseInt(ua.substring(msie + 5, ua.indexOf('.', msie)), 10);
        }

        let trident = ua.indexOf('Trident/');
        if (trident > 0) {
            // IE 11 => return version number
            let rv = ua.indexOf('rv:');
            return parseInt(ua.substring(rv + 3, ua.indexOf('.', rv)), 10);
        }

        let edge = ua.indexOf('Edge/');
        if (edge > 0) {
            // Edge (IE 12+) => return version number
            return parseInt(ua.substring(edge + 5, ua.indexOf('.', edge)), 10);
        }

        // other browser
        return false;
    }
    /**
     * 取得瀏覽器物件<br>
	 * 瀏覽器名稱(IE Chrome Safari Opera Firefox)<br>
	 * browser.fullVersion 瀏覽器版本
     * @author:GYC
     */
    public getBrowser(): Browser {

        let IsMicrofotBrowserversion = this.detectIE();

        if (IsMicrofotBrowserversion === false) {

            let nVer = navigator.appVersion;
            let nAgt = navigator.userAgent;
            let browserName = navigator.appName;
            let fullVersion = '' + parseFloat(navigator.appVersion);
            let majorVersion = parseInt(navigator.appVersion, 10);
            let nameOffset, verOffset, ix;

            // In Opera 15+, the true version is after "OPR/"
            if ((verOffset = nAgt.indexOf("OPR/")) != -1) {
                browserName = "Opera";
                fullVersion = nAgt.substring(verOffset + 4);
            }
            // In older Opera, the true version is after "Opera" or after
            // "Version"
            else if ((verOffset = nAgt.indexOf("Opera")) != -1) {
                browserName = "Opera";
                fullVersion = nAgt.substring(verOffset + 6);
                if ((verOffset = nAgt.indexOf("Version")) != -1)
                    fullVersion = nAgt.substring(verOffset + 8);
            }
            // In Chrome, the true version is after "Chrome"
            else if ((verOffset = nAgt.indexOf("Chrome")) != -1) {
                browserName = "Chrome";
                fullVersion = nAgt.substring(verOffset + 7);
            }
            // In Safari, the true version is after "Safari" or after
            // "Version"
            else if ((verOffset = nAgt.indexOf("Safari")) != -1) {
                browserName = "Safari";
                fullVersion = nAgt.substring(verOffset + 7);
                if ((verOffset = nAgt.indexOf("Version")) != -1)
                    fullVersion = nAgt.substring(verOffset + 8);
            }
            // In Firefox, the true version is after "Firefox"
            else if ((verOffset = nAgt.indexOf("Firefox")) != -1) {
                browserName = "Firefox";
                fullVersion = nAgt.substring(verOffset + 8);
            }
            // In most other browsers, "name/version" is at the end of
            // userAgent
            else if ((nameOffset = nAgt.lastIndexOf(' ') + 1) < (verOffset = nAgt.lastIndexOf('/'))) {
                browserName = nAgt.substring(nameOffset, verOffset);
                fullVersion = nAgt.substring(verOffset + 1);
                if (browserName.toLowerCase() == browserName.toUpperCase()) {
                    browserName = navigator.appName;
                }
            }
            // trim the fullVersion string at semicolon/space if present
            if ((ix = fullVersion.indexOf(";")) != -1)
                fullVersion = fullVersion.substring(0, ix);
            if ((ix = fullVersion.indexOf(" ")) != -1)
                fullVersion = fullVersion.substring(0, ix);

            majorVersion = parseInt('' + fullVersion, 10);
            if (isNaN(majorVersion)) {
                fullVersion = '' + parseFloat(navigator.appVersion);
                majorVersion = parseInt(navigator.appVersion, 10);
            }

            let browser: Browser = {
                name: browserName,
                fullVersion: fullVersion
            }

            return browser;
        } else if (IsMicrofotBrowserversion >= 12) {
            return {
                name: "Edge",
                fullVersion: "" + IsMicrofotBrowserversion
            };

        } else if (IsMicrofotBrowserversion < 12) {
            return {
                name: "IE",
                fullVersion: "" + IsMicrofotBrowserversion
            };
        }


    }

}