/* ****************************************************************************
 *
 * Copyright (c) Microsoft Corporation. All rights reserved.
 *
 * This software is subject to the Microsoft Public License (Ms-PL). 
 * A copy of the license can be found in the license.htm file included 
 * in this distribution.
 *
 * You must not remove this notice, or any other, from this software.
 *
 * ***************************************************************************/

namespace System.Web.Mvc.Ajax {
    using System;
    using System.Diagnostics.CodeAnalysis;
    using System.Globalization;
    using System.Text;
    using System.Web.Mvc.Resources;

    public class AjaxOptions {
        private string _confirm;
        private string _httpMethod;
        private InsertionMode _insertionMode = InsertionMode.Replace;
        private string _loadingElementId;
        private string _onBegin;
        private string _onComplete;
        private string _onFailure;
        private string _onSuccess;
        private string _updateTargetId;
        private string _url;

        public string Confirm {
            get {
                return _confirm ?? String.Empty;
            }
            set {
                _confirm = value;
            }
        }

        public string HttpMethod {
            get {
                return _httpMethod ?? String.Empty;
            }
            set {
                _httpMethod = value;
            }
        }

        public InsertionMode InsertionMode {
            get {
                return _insertionMode;
            }
            set {
                switch (value) {
                    case InsertionMode.Replace:
                    case InsertionMode.InsertAfter:
                    case InsertionMode.InsertBefore:
                        _insertionMode = value;
                        return;

                    default:
                        throw new ArgumentOutOfRangeException("value");
                }
            }
        }

        public string LoadingElementId {
            get {
                return _loadingElementId ?? String.Empty;
            }
            set {
                _loadingElementId = value;
            }
        }

        public string OnBegin {
            get {
                return _onBegin ?? String.Empty;
            }
            set {
                _onBegin = value;
            }
        }

        public string OnComplete {
            get {
                return _onComplete ?? String.Empty;
            }
            set {
                _onComplete = value;
            }
        }

        public string OnFailure {
            get {
                return _onFailure ?? String.Empty;
            }
            set {
                _onFailure = value;
            }
        }

        public string OnSuccess {
            get {
                return _onSuccess ?? String.Empty;
            }
            set {
                _onSuccess = value;
            }
        }

        public string UpdateTargetId {
            get {
                return _updateTargetId ?? String.Empty;
            }
            set {
                _updateTargetId = value;
            }
        }

        [SuppressMessage("Microsoft.Design", "CA1056:UriPropertiesShouldNotBeStrings",
            Justification = "This property is used by the optionsBuilder which always accepts a string.")]
        public string Url {
            get {
                return _url ?? String.Empty;
            }
            set {
                _url = value;
            }
        }

        internal string ToJavascriptString() {
            // creates a string of the form { key1: value1, key2 : value2, ... }
            StringBuilder optionsBuilder = new StringBuilder("{");
            optionsBuilder.Append(String.Format(CultureInfo.InvariantCulture, " insertionMode: {0},", AjaxExtensions.InsertionModeToString(InsertionMode)));
            optionsBuilder.Append(PropertyStringIfSpecified("confirm", Confirm));
            optionsBuilder.Append(PropertyStringIfSpecified("httpMethod", HttpMethod));
            optionsBuilder.Append(PropertyStringIfSpecified("loadingElementId", LoadingElementId));
            optionsBuilder.Append(PropertyStringIfSpecified("updateTargetId", UpdateTargetId));
            optionsBuilder.Append(PropertyStringIfSpecified("url", Url));
            optionsBuilder.Append(EventStringIfSpecified("onBegin", OnBegin));
            optionsBuilder.Append(EventStringIfSpecified("onComplete", OnComplete));
            optionsBuilder.Append(EventStringIfSpecified("onFailure", OnFailure));
            optionsBuilder.Append(EventStringIfSpecified("onSuccess", OnSuccess));
            optionsBuilder.Length--;
            optionsBuilder.Append(" }");
            return optionsBuilder.ToString();
        }

        private static string EventStringIfSpecified(string propertyName, string handler) {
            if (!String.IsNullOrEmpty(handler)) {
                return String.Format(CultureInfo.InvariantCulture, " {0}: Function.createDelegate(this, {1}),", propertyName, handler.ToString());
            }
            return String.Empty;
        }

        private static string PropertyStringIfSpecified(string propertyName, string propertyValue) {
            if (!String.IsNullOrEmpty(propertyValue)) {
                string escapedPropertyValue = propertyValue.Replace("'", @"\'");
                return String.Format(CultureInfo.InvariantCulture, " {0}: '{1}',", propertyName, escapedPropertyValue);
            }
            return String.Empty;
        }
    }
}