var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
    return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var __metadata = (this && this.__metadata) || function (k, v) {
    if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
var __param = (this && this.__param) || function (paramIndex, decorator) {
    return function (target, key) { decorator(target, key, paramIndex); }
};
import { Injectable, Inject, Optional } from 'angular2/core';
import { LocationStrategy, joinWithSlash, APP_BASE_HREF, normalizeQueryParams } from './location_strategy';
import { isPresent } from 'angular2/src/facade/lang';
import { PlatformLocation } from './platform_location';
/**
 * `HashLocationStrategy` is a {@link LocationStrategy} used to configure the
 * {@link Location} service to represent its state in the
 * [hash fragment](https://en.wikipedia.org/wiki/Uniform_Resource_Locator#Syntax)
 * of the browser's URL.
 *
 * For instance, if you call `location.go('/foo')`, the browser's URL will become
 * `example.com#/foo`.
 *
 * ### Example
 *
 * ```
 * import {Component, provide} from 'angular2/angular2';
 * import {
 *   ROUTER_DIRECTIVES,
 *   ROUTER_PROVIDERS,
 *   RouteConfig,
 *   Location,
 *   LocationStrategy,
 *   HashLocationStrategy
 * } from 'angular2/router';
 *
 * @Component({directives: [ROUTER_DIRECTIVES]})
 * @RouteConfig([
 *  {...},
 * ])
 * class AppCmp {
 *   constructor(location: Location) {
 *     location.go('/foo');
 *   }
 * }
 *
 * bootstrap(AppCmp, [
 *   ROUTER_PROVIDERS,
 *   provide(LocationStrategy, {useClass: HashLocationStrategy})
 * ]);
 * ```
 */
export let HashLocationStrategy = class extends LocationStrategy {
    constructor(_platformLocation, _baseHref) {
        super();
        this._platformLocation = _platformLocation;
        this._baseHref = '';
        if (isPresent(_baseHref)) {
            this._baseHref = _baseHref;
        }
    }
    onPopState(fn) {
        this._platformLocation.onPopState(fn);
        this._platformLocation.onHashChange(fn);
    }
    getBaseHref() { return this._baseHref; }
    path() {
        // the hash value is always prefixed with a `#`
        // and if it is empty then it will stay empty
        var path = this._platformLocation.hash;
        // Dart will complain if a call to substring is
        // executed with a position value that extends the
        // length of string.
        return (path.length > 0 ? path.substring(1) : path) +
            normalizeQueryParams(this._platformLocation.search);
    }
    prepareExternalUrl(internal) {
        var url = joinWithSlash(this._baseHref, internal);
        return url.length > 0 ? ('#' + url) : url;
    }
    pushState(state, title, path, queryParams) {
        var url = this.prepareExternalUrl(path + normalizeQueryParams(queryParams));
        if (url.length == 0) {
            url = this._platformLocation.pathname;
        }
        this._platformLocation.pushState(state, title, url);
    }
    replaceState(state, title, path, queryParams) {
        var url = this.prepareExternalUrl(path + normalizeQueryParams(queryParams));
        if (url.length == 0) {
            url = this._platformLocation.pathname;
        }
        this._platformLocation.replaceState(state, title, url);
    }
    forward() { this._platformLocation.forward(); }
    back() { this._platformLocation.back(); }
};
HashLocationStrategy = __decorate([
    Injectable(),
    __param(1, Optional()),
    __param(1, Inject(APP_BASE_HREF)), 
    __metadata('design:paramtypes', [PlatformLocation, String])
], HashLocationStrategy);
