using System;
using System.Text;

namespace TweetDck.Core.Handling{
    sealed class TweetNotification{
        private static string FontSizeClass { get; set; }
        private static string HeadTag { get; set; }

        public static bool IsReady{
            get{
                return FontSizeClass != null && HeadTag != null;
            }
        }

        public static TweetNotification ExampleTweet{
            get{
                StringBuilder build = new StringBuilder();
                build.Append(@"<article><div class='js-stream-item-content item-box js-show-detail'><div class='js-tweet tweet'>");
                build.Append(@"<header class='tweet-header'>");
                build.Append(@"<time class='tweet-timestamp js-timestamp pull-right txt-mute'><a target='_blank' rel='url' href='https://twitter.com/chylexMC' class='txt-small'>0s</a></time>");
                build.Append(@"<a target='_blank' rel='user' href='https://twitter.com/chylexMC' class='account-link link-complex block'>");
                build.Append(@"<div class='obj-left item-img tweet-img'><img width='48' height='48' alt='chylexMC's avatar' src='https://pbs.twimg.com/profile_images/645532929930608642/J56NBJVY_normal.png' class='tweet-avatar avatar pull-right'></div>");
                build.Append(@"<div class='nbfc'><span class='account-inline txt-ellipsis'><b class='fullname link-complex-target'>chylex</b> <span class='username txt-mute'>@chylexMC</span></span></div>");
                build.Append(@"</a>");
                build.Append(@"</header>");
                build.Append(@"<div class='tweet-body'><p class='js-tweet-text tweet-text with-linebreaks'>This is an example tweet, which lets you test the location and duration of popup notifications.</p></div>");
                build.Append(@"</div></div></article>");

                return new TweetNotification(build.ToString(),95);
            }
        }

        public static void SetFontSizeClass(string newFSClass){
            FontSizeClass = newFSClass;
        }

        public static void SetHeadTag(string headContents){
            HeadTag = headContents;
        }

        public enum Position{
            TopLeft, TopRight, BottomLeft, BottomRight, Custom
        }

        public enum Duration{
            Short, Medium, Long, VeryLong
        }

        private readonly string html;
        private readonly int characters;

        public TweetNotification(string html, int characters){
            this.html = html;
            this.characters = characters;
        }

        public int GetDisplayDuration(Duration modifier){
            int multiplier;

            switch(modifier){
                case Duration.Short: multiplier = 15; break;
                case Duration.Long: multiplier = 35; break;
                case Duration.VeryLong: multiplier = 45; break;
                default: multiplier = 25; break;
            }

            return 2000+Math.Max(1000,multiplier*characters);
        }

        public string GenerateHtml(){
            StringBuilder build = new StringBuilder();
            build.Append("<!DOCTYPE html>");
            build.Append("<html class='os-windows ").Append(FontSizeClass).Append("'>");
            build.Append("<head>").Append(HeadTag).Append("</head>");
            build.Append("<body class='hearty'><div class='app-columns-container'><div class='column' style='width:100%'>");
            build.Append(html);
            build.Append("</div></div></body>");
            build.Append("</html>");
            return build.ToString();
        }
    }
}