using CommandLine;
using StackExchange.Redis;
using System;
using System.Collections.Generic;
using System.Linq;
using RedisManager.Utils;

namespace RedisManager.Commands
{
    [Verb("xadd", HelpText = "Add an entry to a stream.")]
    public class XAddOptions
    {
        [Option('i', "instance", Required = true, HelpText = "Instance name.")]
        public string Instance { get; set; }
        [Value(0, MetaName = "stream", Required = true, HelpText = "Stream key.")]
        public string Stream { get; set; }
        [Option("id", Required = false, HelpText = "Entry ID (default: *)")]
        public string Id { get; set; } = "*";
        [Option("fields", Required = true, HelpText = "Field-value pairs as field1:value1,field2:value2...")]
        public IEnumerable<string> Fields { get; set; }
        [Option("table", Required = false, HelpText = "Output as table.")]
        public bool Table { get; set; }
    }

    [Verb("xrange", HelpText = "Get entries from a stream within a range.")]
    public class XRangeOptions
    {
        [Option('i', "instance", Required = true, HelpText = "Instance name.")]
        public string Instance { get; set; }
        [Value(0, MetaName = "stream", Required = true, HelpText = "Stream key.")]
        public string Stream { get; set; }
        [Option("start", Required = false, HelpText = "Start ID (default: -)")]
        public string Start { get; set; } = "-";
        [Option("end", Required = false, HelpText = "End ID (default: +)")]
        public string End { get; set; } = "+";
        [Option("count", Required = false, HelpText = "Maximum number of entries")]
        public int? Count { get; set; }
        [Option("table", Required = false, HelpText = "Output as table.")]
        public bool Table { get; set; }
    }

    [Verb("xlen", HelpText = "Get the length of a stream.")]
    public class XLenOptions
    {
        [Option('i', "instance", Required = true, HelpText = "Instance name.")]
        public string Instance { get; set; }
        [Value(0, MetaName = "stream", Required = true, HelpText = "Stream key.")]
        public string Stream { get; set; }
        [Option("table", Required = false, HelpText = "Output as table.")]
        public bool Table { get; set; }
    }

    [Verb("xdel", HelpText = "Remove entries from a stream.")]
    public class XDelOptions
    {
        [Option('i', "instance", Required = true, HelpText = "Instance name.")]
        public string Instance { get; set; }
        [Value(0, MetaName = "stream", Required = true, HelpText = "Stream key.")]
        public string Stream { get; set; }
        [Value(1, MetaName = "ids", Min = 1, Required = true, HelpText = "Entry IDs to delete.")]
        public IEnumerable<string> Ids { get; set; }
        [Option("table", Required = false, HelpText = "Output as table.")]
        public bool Table { get; set; }
    }

    public static class StreamCommands
    {
        public static int RunXAdd(XAddOptions opts, Config config)
        {
            var instance = RedisUtils.GetInstance(config, opts.Instance);
            using var redis = RedisUtils.ConnectRedis(instance);
            var db = redis.GetDatabase();
            
            // Use XADD command directly
            var args = new List<RedisValue> { opts.Stream, opts.Id };
            foreach (var field in opts.Fields)
            {
                var parts = field.Split(':', 2);
                if (parts.Length == 2)
                {
                    args.Add(parts[0]);
                    args.Add(parts[1]);
                }
            }
            var id = db.Execute("XADD", args.ToArray());
            
            if (opts.Table)
                RedisUtils.PrintTable(new[] { "Stream", "ID", "Fields" }, new List<string[]> { new[] { opts.Stream, id.ToString(), string.Join(", ", opts.Fields) } });
            else
                Console.WriteLine(Output.Green(id.ToString()));
            return 0;
        }

        public static int RunXRange(XRangeOptions opts, Config config)
        {
            var instance = RedisUtils.GetInstance(config, opts.Instance);
            using var redis = RedisUtils.ConnectRedis(instance);
            var db = redis.GetDatabase();
            
            // Use XRANGE command directly
            var args = new List<RedisValue> { opts.Stream, opts.Start, opts.End };
            if (opts.Count.HasValue)
            {
                args.Add("COUNT");
                args.Add(opts.Count.Value);
            }
            var result = db.Execute("XRANGE", args.ToArray());
            
            if (opts.Table)
            {
                Console.WriteLine(Output.Yellow("Table output not supported for XRANGE yet"));
            }
            else
                Console.WriteLine(Output.Green(result.ToString()));
            return 0;
        }

        public static int RunXLen(XLenOptions opts, Config config)
        {
            var instance = RedisUtils.GetInstance(config, opts.Instance);
            using var redis = RedisUtils.ConnectRedis(instance);
            var db = redis.GetDatabase();
            
            // Use XLEN command directly
            var length = db.Execute("XLEN", opts.Stream);
            
            if (opts.Table)
                RedisUtils.PrintTable(new[] { "Stream", "Length" }, new List<string[]> { new[] { opts.Stream, length.ToString() } });
            else
                Console.WriteLine(Output.Green(length.ToString()));
            return 0;
        }

        public static int RunXDel(XDelOptions opts, Config config)
        {
            var instance = RedisUtils.GetInstance(config, opts.Instance);
            using var redis = RedisUtils.ConnectRedis(instance);
            var db = redis.GetDatabase();
            
            // Use XDEL command directly
            var args = new List<RedisValue> { opts.Stream };
            args.AddRange(opts.Ids.Select(id => (RedisValue)id));
            var count = db.Execute("XDEL", args.ToArray());
            
            if (opts.Table)
                RedisUtils.PrintTable(new[] { "Stream", "Deleted Count" }, new List<string[]> { new[] { opts.Stream, count.ToString() } });
            else
                Console.WriteLine(Output.Green($"Deleted {count} entry(ies)"));
            return 0;
        }


    }
}