using MediaBrowser.Dlna.Common;
using MediaBrowser.Model.Dlna;
using MediaBrowser.Model.Extensions;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Security;
using System.Text;

namespace MediaBrowser.Dlna.Server
{
    public class DescriptionXmlBuilder
    {
        private readonly DeviceProfile _profile;

        private readonly CultureInfo _usCulture = new CultureInfo("en-US");
        private readonly string _serverUdn;
        private readonly string _serverAddress;
        private readonly string _serverName;
        private readonly string _serverId;

        public DescriptionXmlBuilder(DeviceProfile profile, string serverUdn, string serverAddress, string serverName, string serverId)
        {
            if (string.IsNullOrWhiteSpace(serverUdn))
            {
                throw new ArgumentNullException("serverUdn");
            }

            if (string.IsNullOrWhiteSpace(serverAddress))
            {
                throw new ArgumentNullException("serverAddress");
            }

            _profile = profile;
            _serverUdn = serverUdn;
            _serverAddress = serverAddress;
            _serverName = serverName;
            _serverId = serverId;
        }

        private bool EnableAbsoluteUrls
        {
            get { return false; }
        }

        public string GetXml()
        {
            var builder = new StringBuilder();

            builder.Append("<?xml version=\"1.0\"?>");

            builder.Append("<root");

            var attributes = _profile.XmlRootAttributes.ToList();

            if (_profile.EnableDlnaProtocol)
            {
                attributes.Insert(0, new XmlAttribute
                {
                    Name = "xmlns:dlna",
                    Value = "urn:schemas-dlna-org:device-1-0"
                });
            }
            attributes.Insert(0, new XmlAttribute
            {
                Name = "xmlns",
                Value = "urn:schemas-upnp-org:device-1-0"
            });

            foreach (var att in attributes)
            {
                builder.AppendFormat(" {0}=\"{1}\"", att.Name, att.Value);
            }

            builder.Append(">");

            builder.Append("<specVersion>");
            builder.Append("<major>1</major>");
            builder.Append("<minor>0</minor>");
            builder.Append("</specVersion>");

            AppendDeviceInfo(builder);

            builder.Append("</root>");

            return builder.ToString();
        }

        private void AppendDeviceInfo(StringBuilder builder)
        {
            builder.Append("<device>");
            AppendDeviceProperties(builder);

            if (_profile.EnableDlnaProtocol)
            {
                AppendIconList(builder);
            }
            AppendServiceList(builder);
            builder.Append("</device>");
        }

        private void AppendDeviceProperties(StringBuilder builder)
        {
            builder.Append("<deviceType>urn:schemas-upnp-org:device:MediaServer:1</deviceType>");

            if (_profile.EnableDlnaProtocol)
            {
                builder.Append("<dlna:X_DLNACAP>" + SecurityElement.Escape(_profile.XDlnaCap ?? string.Empty) + "</dlna:X_DLNACAP>");

                builder.Append("<dlna:X_DLNADOC xmlns:dlna=\"urn:schemas-dlna-org:device-1-0\">M-DMS-1.50</dlna:X_DLNADOC>");
                builder.Append("<dlna:X_DLNADOC xmlns:dlna=\"urn:schemas-dlna-org:device-1-0\">" + SecurityElement.Escape(_profile.XDlnaDoc ?? string.Empty) + "</dlna:X_DLNADOC>");
            }

            builder.Append("<friendlyName>" + SecurityElement.Escape(GetFriendlyName()) + "</friendlyName>");
            builder.Append("<manufacturer>" + SecurityElement.Escape(_profile.Manufacturer ?? string.Empty) + "</manufacturer>");
            builder.Append("<manufacturerURL>" + SecurityElement.Escape(_profile.ManufacturerUrl ?? string.Empty) + "</manufacturerURL>");

            builder.Append("<modelDescription>" + SecurityElement.Escape(_profile.ModelDescription ?? string.Empty) + "</modelDescription>");
            builder.Append("<modelName>" + SecurityElement.Escape(_profile.ModelName ?? string.Empty) + "</modelName>");

            builder.Append("<modelNumber>" + SecurityElement.Escape(_profile.ModelNumber ?? string.Empty) + "</modelNumber>");
            builder.Append("<modelURL>" + SecurityElement.Escape(_profile.ModelUrl ?? string.Empty) + "</modelURL>");

            if (string.IsNullOrWhiteSpace(_profile.SerialNumber))
            {
                builder.Append("<serialNumber>" + SecurityElement.Escape(_serverId) + "</serialNumber>");
            }
            else
            {
                builder.Append("<serialNumber>" + SecurityElement.Escape(_profile.SerialNumber) + "</serialNumber>");
            }

            builder.Append("<UDN>uuid:" + SecurityElement.Escape(_serverUdn) + "</UDN>");
            builder.Append("<presentationURL>" + SecurityElement.Escape(_serverAddress) + "</presentationURL>");

            if (!EnableAbsoluteUrls)
            {
                //builder.Append("<URLBase>" + SecurityElement.Escape(_serverAddress) + "</URLBase>");
            }

            if (!string.IsNullOrWhiteSpace(_profile.SonyAggregationFlags))
            {
                builder.Append("<av:aggregationFlags xmlns:av=\"urn:schemas-sony-com:av\">" + SecurityElement.Escape(_profile.SonyAggregationFlags) + "</av:aggregationFlags>");
            }
        }

        private string GetFriendlyName()
        {
            var characters = _serverName.Where(c => (char.IsLetterOrDigit(c) || c == '-')).ToArray();

            var serverName = new string(characters);

            var name = (_profile.FriendlyName ?? string.Empty).Replace("${HostName}", serverName, StringComparison.OrdinalIgnoreCase);

            return name;
        }

        private void AppendIconList(StringBuilder builder)
        {
            builder.Append("<iconList>");

            foreach (var icon in GetIcons())
            {
                builder.Append("<icon>");

                builder.Append("<mimetype>" + SecurityElement.Escape(icon.MimeType ?? string.Empty) + "</mimetype>");
                builder.Append("<width>" + SecurityElement.Escape(icon.Width.ToString(_usCulture)) + "</width>");
                builder.Append("<height>" + SecurityElement.Escape(icon.Height.ToString(_usCulture)) + "</height>");
                builder.Append("<depth>" + SecurityElement.Escape(icon.Depth ?? string.Empty) + "</depth>");
                builder.Append("<url>" + BuildUrl(icon.Url) + "</url>");

                builder.Append("</icon>");
            }

            builder.Append("</iconList>");
        }

        private void AppendServiceList(StringBuilder builder)
        {
            builder.Append("<serviceList>");

            foreach (var service in GetServices())
            {
                builder.Append("<service>");

                builder.Append("<serviceType>" + SecurityElement.Escape(service.ServiceType ?? string.Empty) + "</serviceType>");
                builder.Append("<serviceId>" + SecurityElement.Escape(service.ServiceId ?? string.Empty) + "</serviceId>");
                builder.Append("<SCPDURL>" + BuildUrl(service.ScpdUrl) + "</SCPDURL>");
                builder.Append("<controlURL>" + BuildUrl(service.ControlUrl) + "</controlURL>");
                builder.Append("<eventSubURL>" + BuildUrl(service.EventSubUrl) + "</eventSubURL>");

                builder.Append("</service>");
            }

            builder.Append("</serviceList>");
        }

        private string BuildUrl(string url)
        {
            if (string.IsNullOrWhiteSpace(url))
            {
                return string.Empty;
            }

            url = url.TrimStart('/');

            url = "/dlna/" + _serverUdn + "/" + url;

            if (EnableAbsoluteUrls)
            {
                url = _serverAddress.TrimEnd('/') + url;
            }

            return SecurityElement.Escape(url);
        }

        private IEnumerable<DeviceIcon> GetIcons()
        {
            var list = new List<DeviceIcon>();

            list.Add(new DeviceIcon
            {
                MimeType = "image/png",
                Depth = "24",
                Width = 240,
                Height = 240,
                Url = "icons/logo240.png"
            });

            list.Add(new DeviceIcon
            {
                MimeType = "image/jpeg",
                Depth = "24",
                Width = 240,
                Height = 240,
                Url = "icons/logo240.jpg"
            });

            list.Add(new DeviceIcon
            {
                MimeType = "image/png",
                Depth = "24",
                Width = 120,
                Height = 120,
                Url = "icons/logo120.png"
            });

            list.Add(new DeviceIcon
            {
                MimeType = "image/jpeg",
                Depth = "24",
                Width = 120,
                Height = 120,
                Url = "icons/logo120.jpg"
            });

            list.Add(new DeviceIcon
            {
                MimeType = "image/png",
                Depth = "24",
                Width = 48,
                Height = 48,
                Url = "icons/logo48.png"
            });

            list.Add(new DeviceIcon
            {
                MimeType = "image/jpeg",
                Depth = "24",
                Width = 48,
                Height = 48,
                Url = "icons/logo48.jpg"
            });

            return list;
        }

        private IEnumerable<DeviceService> GetServices()
        {
            var list = new List<DeviceService>();

            list.Add(new DeviceService
            {
                ServiceType = "urn:schemas-upnp-org:service:ContentDirectory:1",
                ServiceId = "urn:upnp-org:serviceId:ContentDirectory",
                ScpdUrl = "contentdirectory/contentdirectory.xml",
                ControlUrl = "contentdirectory/control",
                EventSubUrl = "contentdirectory/events"
            });

            list.Add(new DeviceService
            {
                ServiceType = "urn:schemas-upnp-org:service:ConnectionManager:1",
                ServiceId = "urn:upnp-org:serviceId:ConnectionManager",
                ScpdUrl = "connectionmanager/connectionmanager.xml",
                ControlUrl = "connectionmanager/control",
                EventSubUrl = "connectionmanager/events"
            });

            if (_profile.EnableMSMediaReceiverRegistrar)
            {
                list.Add(new DeviceService
                {
                    ServiceType = "urn:microsoft.com:service:X_MS_MediaReceiverRegistrar:1",
                    ServiceId = "urn:microsoft.com:serviceId:X_MS_MediaReceiverRegistrar",
                    ScpdUrl = "mediareceiverregistrar/mediareceiverregistrar.xml",
                    ControlUrl = "mediareceiverregistrar/control",
                    EventSubUrl = "mediareceiverregistrar/events"
                });
            }

            return list;
        }

        public override string ToString()
        {
            return GetXml();
        }
    }
}
