// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using System.Linq;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Routing;

namespace RoutingWebSite
{
    public class LG1Controller : Controller
    {
        private readonly LinkGenerator _linkGenerator;

        public LG1Controller(LinkGenerator linkGenerator)
        {
            _linkGenerator = linkGenerator;
        }
        
        public string LinkToSelf()
        {
            return _linkGenerator.GetPathByAction(HttpContext, values: QueryToRouteValues(HttpContext.Request.Query));
        }

        public string LinkToAnotherAction()
        {
            return _linkGenerator.GetPathByAction(
                HttpContext,
                action: nameof(LinkToSelf),
                values: QueryToRouteValues(HttpContext.Request.Query));
        }

        public string LinkToAnotherController()
        {
            return _linkGenerator.GetPathByAction(
                HttpContext,
                controller: "LG2",
                action: nameof(LG2Controller.SomeAction),
                values: QueryToRouteValues(HttpContext.Request.Query));
        }

        public string LinkToAnArea()
        {
            var values = QueryToRouteValues(HttpContext.Request.Query);
            values["area"] = "Admin";

            return _linkGenerator.GetPathByAction(
                HttpContext,
                controller: "LG3",
                action: nameof(LG3Controller.SomeAction),
                values: values);
        }

        public string LinkToPage()
        {
            return _linkGenerator.GetPathByPage(
                HttpContext,
                page: "/LGPage",
                values: QueryToRouteValues(HttpContext.Request.Query));
        }

        public string LinkToPageWithTransformedPath()
        {
            return _linkGenerator.GetPathByPage(
                HttpContext,
                page: "/PageRouteTransformer/TestPage",
                values: QueryToRouteValues(HttpContext.Request.Query));
        }

        public string LinkToPageInArea()
        {
            var values = QueryToRouteValues(HttpContext.Request.Query);
            values["area"] = "Admin";
            return _linkGenerator.GetPathByPage(
                HttpContext,
                page: "/LGAreaPage",
                handler: "a-handler",
                values: values);
        }

        public string LinkWithFullUri()
        {
            return _linkGenerator.GetUriByAction(
                HttpContext,
                controller: "LG1",
                action: nameof(LinkWithFullUri),
                values: QueryToRouteValues(HttpContext.Request.Query),
                fragment: new FragmentString("#hi"));
        }

        public string LinkToPageWithFullUri()
        {
            return _linkGenerator.GetUriByPage(
                HttpContext,
                page: "/LGPage",
                values: QueryToRouteValues(HttpContext.Request.Query));
        }

        public string LinkWithFullUriWithoutHttpContext()
        {
            return _linkGenerator.GetUriByAction(
                scheme: "https",
                host: new HostString("www.example.com"),
                controller: "LG1",
                action: nameof(LinkWithFullUri),
                values: QueryToRouteValues(HttpContext.Request.Query),
                fragment: new FragmentString("#hi"));
        }

        public string LinkToPageWithFullUriWithoutHttpContext()
        {
            var values = QueryToRouteValues(HttpContext.Request.Query);
            values["area"] = "Admin";
            return _linkGenerator.GetUriByPage(
                scheme: "https",
                host: new HostString("www.example.com"),
                page: "/LGAreaPage",
                handler: "a-handler",
                values: values);
        }

        private static RouteValueDictionary QueryToRouteValues(IQueryCollection query)
        {
            return new RouteValueDictionary(query.ToDictionary(kvp => kvp.Key, kvp => kvp.Value.ToString()));
        }
    }
}