using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;

// ReSharper disable InconsistentNaming
// ReSharper disable StringLiteralTypo

namespace IRCStates
{
    public class ISupport
    {
        public Dictionary<string, string> Raw { get; } = new Dictionary<string, string>();
        public string Network { get; private set; }
        public ISupportChanModes ChanModes { get; private set; } = new ISupportChanModes("b,k,l,imnpst");
        public ISupportPrefix Prefix { get; private set; } = new ISupportPrefix("(ov)@+");
        public int? Modes { get; private set; } = 3;
        public Casemap.CaseMapping CaseMapping { get; private set; } = Casemap.CaseMapping.Rfc1459;
        public List<string> ChanTypes { get; private set; } = new List<string> { "#" };
        public List<string> StatusMsg { get; private set; } = new List<string>();
        public string CallerId { get; private set; }
        public string Excepts { get; private set; }
        public string Invex { get; private set; }
        public int? Monitor { get; private set; }
        public int? Watch { get; private set; }
        public bool Whox { get; private set; }

        /// <summary>
        /// Parse the ISupport values from the line's parameters
        /// </summary>
        /// <param name="tokens"></param>
        public void Parse(IEnumerable<string> tokens)
        {
            if (tokens == null) return;

            // remove first and last
            tokens = tokens.Skip(1).SkipLast(1);

            foreach (var token in tokens)
            {
                var split = token.Split('=', 2);
                var key   = split[0];

                var value = string.Empty;
                if (split.Length > 1)
                {
                    value    = split[1];
                    Raw[key] = value;
                }

                switch (split[0])
                {
                    case "NETWORK":
                        Network = value;
                        break;
                    case "CHANMODES":
                        ChanModes = new ISupportChanModes(value);
                        break;
                    case "PREFIX":
                        Prefix = new ISupportPrefix(value);
                        break;
                    case "STATUSMSG":
                        StatusMsg = new List<string>();
                        StatusMsg.AddRange(value.Select(c => c.ToString(CultureInfo.InvariantCulture)));
                        break;
                    case "MODES":
                        if (int.TryParse(value, NumberStyles.Integer, CultureInfo.InvariantCulture, out var modes))
                            Modes = modes;
                        else
                            Modes = -1;
                        break;
                    case "MONITOR":
                        if (int.TryParse(value, NumberStyles.Integer, CultureInfo.InvariantCulture, out var monitor))
                            Monitor = monitor;
                        else
                            Monitor = -1;
                        break;
                    case "WATCH":
                        if (int.TryParse(value, NumberStyles.Integer, CultureInfo.InvariantCulture, out var watch))
                            Watch = watch;
                        else
                            Watch = -1;
                        break;
                    case "CASEMAPPING":
                        if (Enum.TryParse(value, true, out Casemap.CaseMapping caseMapping)) CaseMapping = caseMapping;
                        break;
                    case "CHANTYPES":
                        ChanTypes = new List<string>();
                        ChanTypes.AddRange(value.Select(c => c.ToString(CultureInfo.InvariantCulture)));
                        break;
                    case "CALLERID":
                        CallerId = string.IsNullOrEmpty(value) ? "g" : value;
                        break;
                    case "EXCEPTS":
                        Excepts = string.IsNullOrEmpty(value) ? "e" : value;
                        break;
                    case "INVEX":
                        Invex = string.IsNullOrEmpty(value) ? "I" : value;
                        break;
                    case "WHOX":
                        Whox = true;
                        break;
                }
            }
        }
    }
}