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

using RedisManager.Commands;

namespace RedisManager.Commands
{
    [Verb("sadd", HelpText = "Add members to a set.")]
    public class SAddOptions : InstanceOptions
    {
        [Value(0, MetaName = "key", Required = true, HelpText = "Set key.")]
        public string Key { get; set; }
        [Value(1, MetaName = "members", Min = 1, Required = true, HelpText = "Members to add.")]
        public IEnumerable<string> Members { get; set; }
        [Option("table", Required = false, HelpText = "Output as table.")]
        public bool Table { get; set; }
    }

    [Verb("srem", HelpText = "Remove members from a set.")]
    public class SRemOptions : InstanceOptions
    {
        [Value(0, MetaName = "key", Required = true, HelpText = "Set key.")]
        public string Key { get; set; }
        [Value(1, MetaName = "members", Min = 1, Required = true, HelpText = "Members to remove.")]
        public IEnumerable<string> Members { get; set; }
        [Option("table", Required = false, HelpText = "Output as table.")]
        public bool Table { get; set; }
    }

    [Verb("smembers", HelpText = "Get all members of a set.")]
    public class SMembersOptions : InstanceOptions
    {
        [Value(0, MetaName = "key", Required = true, HelpText = "Set key.")]
        public string Key { get; set; }
        [Option("table", Required = false, HelpText = "Output as table.")]
        public bool Table { get; set; }
    }

    [Verb("scard", HelpText = "Get the number of members in a set.")]
    public class SCardOptions : InstanceOptions
    {
        [Value(0, MetaName = "key", Required = true, HelpText = "Set key.")]
        public string Key { get; set; }
        [Option("table", Required = false, HelpText = "Output as table.")]
        public bool Table { get; set; }
    }

    [Verb("sismember", HelpText = "Check if a member exists in a set.")]
    public class SIsMemberOptions : InstanceOptions
    {
        [Value(0, MetaName = "key", Required = true, HelpText = "Set key.")]
        public string Key { get; set; }
        [Value(1, MetaName = "member", Required = true, HelpText = "Member to check.")]
        public string Member { get; set; }
        [Option("table", Required = false, HelpText = "Output as table.")]
        public bool Table { get; set; }
    }

    [Verb("srandmember", HelpText = "Get random member(s) from a set.")]
    public class SRandMemberOptions : InstanceOptions
    {
        [Value(0, MetaName = "key", Required = true, HelpText = "Set key.")]
        public string Key { get; set; }
        [Option("count", Required = false, HelpText = "Number of random members to get.")]
        public int? Count { get; set; }
        [Option("table", Required = false, HelpText = "Output as table.")]
        public bool Table { get; set; }
    }

    [Verb("spop", HelpText = "Remove and return random member(s) from a set.")]
    public class SPopOptions : InstanceOptions
    {
        [Value(0, MetaName = "key", Required = true, HelpText = "Set key.")]
        public string Key { get; set; }
        [Option("count", Required = false, HelpText = "Number of members to pop.")]
        public int? Count { get; set; }
        [Option("table", Required = false, HelpText = "Output as table.")]
        public bool Table { get; set; }
    }

    [Verb("sinter", HelpText = "Get intersection of multiple sets.")]
    public class SInterOptions : InstanceOptions
    {
        [Value(0, MetaName = "keys", Min = 2, Required = true, HelpText = "Set keys.")]
        public IEnumerable<string> Keys { get; set; }
        [Option("table", Required = false, HelpText = "Output as table.")]
        public bool Table { get; set; }
    }

    [Verb("sunion", HelpText = "Get union of multiple sets.")]
    public class SUnionOptions : InstanceOptions
    {
        [Value(0, MetaName = "keys", Min = 2, Required = true, HelpText = "Set keys.")]
        public IEnumerable<string> Keys { get; set; }
        [Option("table", Required = false, HelpText = "Output as table.")]
        public bool Table { get; set; }
    }

    [Verb("sdiff", HelpText = "Get difference of multiple sets.")]
    public class SDiffOptions : InstanceOptions
    {
        [Value(0, MetaName = "keys", Min = 2, Required = true, HelpText = "Set keys.")]
        public IEnumerable<string> Keys { get; set; }
        [Option("table", Required = false, HelpText = "Output as table.")]
        public bool Table { get; set; }
    }

    [Verb("sinterstore", HelpText = "Store intersection of multiple sets.")]
    public class SInterStoreOptions : InstanceOptions
    {
        [Value(0, MetaName = "destination", Required = true, HelpText = "Destination set key.")]
        public string Destination { get; set; }
        [Value(1, MetaName = "keys", Min = 2, Required = true, HelpText = "Source set keys.")]
        public IEnumerable<string> Keys { get; set; }
        [Option("table", Required = false, HelpText = "Output as table.")]
        public bool Table { get; set; }
    }

    [Verb("sunionstore", HelpText = "Store union of multiple sets.")]
    public class SUnionStoreOptions : InstanceOptions
    {
        [Value(0, MetaName = "destination", Required = true, HelpText = "Destination set key.")]
        public string Destination { get; set; }
        [Value(1, MetaName = "keys", Min = 2, Required = true, HelpText = "Source set keys.")]
        public IEnumerable<string> Keys { get; set; }
        [Option("table", Required = false, HelpText = "Output as table.")]
        public bool Table { get; set; }
    }

    [Verb("sdiffstore", HelpText = "Store difference of multiple sets.")]
    public class SDiffStoreOptions : InstanceOptions
    {
        [Value(0, MetaName = "destination", Required = true, HelpText = "Destination set key.")]
        public string Destination { get; set; }
        [Value(1, MetaName = "keys", Min = 2, Required = true, HelpText = "Source set keys.")]
        public IEnumerable<string> Keys { get; set; }
        [Option("table", Required = false, HelpText = "Output as table.")]
        public bool Table { get; set; }
    }

    [Verb("sscan", HelpText = "Scan set members.")]
    public class SScanOptions : InstanceOptions
    {
        [Value(0, MetaName = "key", Required = true, HelpText = "Set key.")]
        public string Key { get; set; }
        [Value(1, MetaName = "cursor", Required = true, HelpText = "Cursor position.")]
        public int Cursor { get; set; }
        [Option("match", Required = false, HelpText = "Pattern to match.")]
        public string Match { get; set; }
        [Option("count", Required = false, HelpText = "Count hint.")]
        public int? Count { get; set; }
        [Option("table", Required = false, HelpText = "Output as table.")]
        public bool Table { get; set; }
    }

    [Verb("smove", HelpText = "Move member from one set to another.")]
    public class SMoveOptions : InstanceOptions
    {
        [Value(0, MetaName = "source", Required = true, HelpText = "Source set key.")]
        public string Source { get; set; }
        [Value(1, MetaName = "destination", Required = true, HelpText = "Destination set key.")]
        public string Destination { get; set; }
        [Value(2, MetaName = "member", Required = true, HelpText = "Member to move.")]
        public string Member { get; set; }
        [Option("table", Required = false, HelpText = "Output as table.")]
        public bool Table { get; set; }
    }

    public static class SetCommands
    {
        /// <summary>
        /// Executes the SADD command to add members to a set.
        /// </summary>
        /// <param name="opts">The SAddOptions containing instance, key, and members.</param>
        /// <param name="config">The RedisManager configuration.</param>
        /// <returns>Exit code (0 for success, non-zero for failure).</returns>
        public static int RunSAdd(SAddOptions opts, Config config)
        {
            var instance = RedisUtils.GetInstance(config, opts.Instance);
            using var redis = RedisUtils.ConnectRedis(instance);
            var db = redis.GetDatabase();
            
            var members = opts.Members.ToArray();
            var count = db.SetAdd(opts.Key, members.Select(m => (RedisValue)m).ToArray());
            
            if (opts.Table)
            {
                var rows = members.Select(m => new[] { m, "Added" }).ToList();
                RedisUtils.PrintTable(new[] { "Member", "Status" }, rows);
                RedisUtils.PrintTable(new[] { "Key", "Added Count" }, new List<string[]> { new[] { opts.Key, count.ToString() } });
            }
            else
                Console.WriteLine(Output.Green($"Added {count} new member(s)"));
            return 0;
        }

        /// <summary>
        /// Executes the SREM command to remove members from a set.
        /// </summary>
        /// <param name="opts">The SRemOptions containing instance, key, and members.</param>
        /// <param name="config">The RedisManager configuration.</param>
        /// <returns>Exit code (0 for success, non-zero for failure).</returns>
        public static int RunSRem(SRemOptions opts, Config config)
        {
            var instance = RedisUtils.GetInstance(config, opts.Instance);
            using var redis = RedisUtils.ConnectRedis(instance);
            var db = redis.GetDatabase();
            
            var members = opts.Members.ToArray();
            var count = db.SetRemove(opts.Key, members.Select(m => (RedisValue)m).ToArray());
            
            if (opts.Table)
            {
                var rows = members.Select(m => new[] { m, "Removed" }).ToList();
                RedisUtils.PrintTable(new[] { "Member", "Status" }, rows);
                RedisUtils.PrintTable(new[] { "Key", "Removed Count" }, new List<string[]> { new[] { opts.Key, count.ToString() } });
            }
            else
                Console.WriteLine(Output.Green($"Removed {count} member(s)"));
            return 0;
        }

        /// <summary>
        /// Executes the SMEMBERS command to get all members of a set.
        /// </summary>
        /// <param name="opts">The SMembersOptions containing instance and key.</param>
        /// <param name="config">The RedisManager configuration.</param>
        /// <returns>Exit code (0 for success, non-zero for failure).</returns>
        public static int RunSMembers(SMembersOptions opts, Config config)
        {
            var instance = RedisUtils.GetInstance(config, opts.Instance);
            using var redis = RedisUtils.ConnectRedis(instance);
            var db = redis.GetDatabase();
            
            var members = db.SetMembers(opts.Key);
            
            if (opts.Table)
            {
                var rows = members.Select(m => new[] { m.ToString() }).ToList();
                RedisUtils.PrintTable(new[] { "Member" }, rows);
            }
            else
                foreach (var member in members)
                    Console.WriteLine(Output.Green(member.ToString()));
            return 0;
        }

        /// <summary>
        /// Executes the SCARD command to get the number of members in a set.
        /// </summary>
        /// <param name="opts">The SCardOptions containing instance and key.</param>
        /// <param name="config">The RedisManager configuration.</param>
        /// <returns>Exit code (0 for success, non-zero for failure).</returns>
        public static int RunSCard(SCardOptions opts, Config config)
        {
            var instance = RedisUtils.GetInstance(config, opts.Instance);
            using var redis = RedisUtils.ConnectRedis(instance);
            var db = redis.GetDatabase();
            
            var count = db.SetLength(opts.Key);
            
            if (opts.Table)
                RedisUtils.PrintTable(new[] { "Key", "Cardinality" }, new List<string[]> { new[] { opts.Key, count.ToString() } });
            else
                Console.WriteLine(Output.Green(count.ToString()));
            return 0;
        }

        /// <summary>
        /// Executes the SISMEMBER command to check if a member exists in a set.
        /// </summary>
        /// <param name="opts">The SIsMemberOptions containing instance, key, and member.</param>
        /// <param name="config">The RedisManager configuration.</param>
        /// <returns>Exit code (0 for success, non-zero for failure).</returns>
        public static int RunSIsMember(SIsMemberOptions opts, Config config)
        {
            var instance = RedisUtils.GetInstance(config, opts.Instance);
            using var redis = RedisUtils.ConnectRedis(instance);
            var db = redis.GetDatabase();
            
            var exists = db.SetContains(opts.Key, opts.Member);
            
            if (opts.Table)
                RedisUtils.PrintTable(new[] { "Key", "Member", "Exists" }, new List<string[]> { new[] { opts.Key, opts.Member, exists.ToString() } });
            else
                Console.WriteLine(Output.Green(exists.ToString()));
            return 0;
        }

        /// <summary>
        /// Executes the SRANDMEMBER command to get random member(s) from a set.
        /// </summary>
        /// <param name="opts">The SRandMemberOptions containing instance, key, and count.</param>
        /// <param name="config">The RedisManager configuration.</param>
        /// <returns>Exit code (0 for success, non-zero for failure).</returns>
        public static int RunSRandMember(SRandMemberOptions opts, Config config)
        {
            var instance = RedisUtils.GetInstance(config, opts.Instance);
            using var redis = RedisUtils.ConnectRedis(instance);
            var db = redis.GetDatabase();
            
            if (opts.Count.HasValue)
            {
                var members = db.SetRandomMembers(opts.Key, opts.Count.Value);
                if (opts.Table)
                {
                    var rows = members.Select(m => new[] { m.ToString() }).ToList();
                    RedisUtils.PrintTable(new[] { "Random Member" }, rows);
                }
                else
                    foreach (var member in members)
                        Console.WriteLine(Output.Green(member.ToString()));
            }
            else
            {
                var member = db.SetRandomMember(opts.Key);
                if (opts.Table)
                    RedisUtils.PrintTable(new[] { "Key", "Random Member" }, new List<string[]> { new[] { opts.Key, member.ToString() } });
                else
                    Console.WriteLine(Output.Green(member.ToString()));
            }
            return 0;
        }

        /// <summary>
        /// Executes the SPOP command to remove and return random member(s) from a set.
        /// </summary>
        /// <param name="opts">The SPopOptions containing instance, key, and count.</param>
        /// <param name="config">The RedisManager configuration.</param>
        /// <returns>Exit code (0 for success, non-zero for failure).</returns>
        public static int RunSPop(SPopOptions opts, Config config)
        {
            var instance = RedisUtils.GetInstance(config, opts.Instance);
            using var redis = RedisUtils.ConnectRedis(instance);
            var db = redis.GetDatabase();
            
            if (opts.Count.HasValue)
            {
                var members = db.SetPop(opts.Key, opts.Count.Value);
                if (opts.Table)
                {
                    var rows = members.Select(m => new[] { m.ToString() }).ToList();
                    RedisUtils.PrintTable(new[] { "Popped Member" }, rows);
                }
                else
                    foreach (var member in members)
                        Console.WriteLine(Output.Green(member.ToString()));
            }
            else
            {
                var member = db.SetPop(opts.Key);
                if (opts.Table)
                    RedisUtils.PrintTable(new[] { "Key", "Popped Member" }, new List<string[]> { new[] { opts.Key, member.ToString() } });
                else
                    Console.WriteLine(Output.Green(member.ToString()));
            }
            return 0;
        }

        /// <summary>
        /// Executes the SINTER command to get the intersection of multiple sets.
        /// </summary>
        /// <param name="opts">The SInterOptions containing instance and keys.</param>
        /// <param name="config">The RedisManager configuration.</param>
        /// <returns>Exit code (0 for success, non-zero for failure).</returns>
        public static int RunSInter(SInterOptions opts, Config config)
        {
            var instance = RedisUtils.GetInstance(config, opts.Instance);
            using var redis = RedisUtils.ConnectRedis(instance);
            var db = redis.GetDatabase();
            
            var keys = opts.Keys.Select(k => (RedisKey)k).ToArray();
            var members = db.SetCombine(SetOperation.Intersect, keys);
            
            if (opts.Table)
            {
                var rows = members.Select(m => new[] { m.ToString() }).ToList();
                RedisUtils.PrintTable(new[] { "Intersection Member" }, rows);
            }
            else
                foreach (var member in members)
                    Console.WriteLine(Output.Green(member.ToString()));
            return 0;
        }

        /// <summary>
        /// Executes the SUNION command to get the union of multiple sets.
        /// </summary>
        /// <param name="opts">The SUnionOptions containing instance and keys.</param>
        /// <param name="config">The RedisManager configuration.</param>
        /// <returns>Exit code (0 for success, non-zero for failure).</returns>
        public static int RunSUnion(SUnionOptions opts, Config config)
        {
            var instance = RedisUtils.GetInstance(config, opts.Instance);
            using var redis = RedisUtils.ConnectRedis(instance);
            var db = redis.GetDatabase();
            
            var keys = opts.Keys.Select(k => (RedisKey)k).ToArray();
            var members = db.SetCombine(SetOperation.Union, keys);
            
            if (opts.Table)
            {
                var rows = members.Select(m => new[] { m.ToString() }).ToList();
                RedisUtils.PrintTable(new[] { "Union Member" }, rows);
            }
            else
                foreach (var member in members)
                    Console.WriteLine(Output.Green(member.ToString()));
            return 0;
        }

        /// <summary>
        /// Executes the SDIFF command to get the difference of multiple sets.
        /// </summary>
        /// <param name="opts">The SDiffOptions containing instance and keys.</param>
        /// <param name="config">The RedisManager configuration.</param>
        /// <returns>Exit code (0 for success, non-zero for failure).</returns>
        public static int RunSDiff(SDiffOptions opts, Config config)
        {
            var instance = RedisUtils.GetInstance(config, opts.Instance);
            using var redis = RedisUtils.ConnectRedis(instance);
            var db = redis.GetDatabase();
            
            var keys = opts.Keys.Select(k => (RedisKey)k).ToArray();
            var members = db.SetCombine(SetOperation.Difference, keys);
            
            if (opts.Table)
            {
                var rows = members.Select(m => new[] { m.ToString() }).ToList();
                RedisUtils.PrintTable(new[] { "Difference Member" }, rows);
            }
            else
                foreach (var member in members)
                    Console.WriteLine(Output.Green(member.ToString()));
            return 0;
        }

        /// <summary>
        /// Executes the SINTERSTORE command to store the intersection of multiple sets.
        /// </summary>
        /// <param name="opts">The SInterStoreOptions containing instance, destination, and keys.</param>
        /// <param name="config">The RedisManager configuration.</param>
        /// <returns>Exit code (0 for success, non-zero for failure).</returns>
        public static int RunSInterStore(SInterStoreOptions opts, Config config)
        {
            var instance = RedisUtils.GetInstance(config, opts.Instance);
            using var redis = RedisUtils.ConnectRedis(instance);
            var db = redis.GetDatabase();
            
            var keys = opts.Keys.Select(k => (RedisKey)k).ToArray();
            var count = db.SetCombineAndStore(SetOperation.Intersect, opts.Destination, keys);
            
            if (opts.Table)
                RedisUtils.PrintTable(new[] { "Destination", "Stored Count" }, new List<string[]> { new[] { opts.Destination, count.ToString() } });
            else
                Console.WriteLine(Output.Green($"Stored {count} member(s) in {opts.Destination}"));
            return 0;
        }

        /// <summary>
        /// Executes the SUNIONSTORE command to store the union of multiple sets.
        /// </summary>
        /// <param name="opts">The SUnionStoreOptions containing instance, destination, and keys.</param>
        /// <param name="config">The RedisManager configuration.</param>
        /// <returns>Exit code (0 for success, non-zero for failure).</returns>
        public static int RunSUnionStore(SUnionStoreOptions opts, Config config)
        {
            var instance = RedisUtils.GetInstance(config, opts.Instance);
            using var redis = RedisUtils.ConnectRedis(instance);
            var db = redis.GetDatabase();
            
            var keys = opts.Keys.Select(k => (RedisKey)k).ToArray();
            var count = db.SetCombineAndStore(SetOperation.Union, opts.Destination, keys);
            
            if (opts.Table)
                RedisUtils.PrintTable(new[] { "Destination", "Stored Count" }, new List<string[]> { new[] { opts.Destination, count.ToString() } });
            else
                Console.WriteLine(Output.Green($"Stored {count} member(s) in {opts.Destination}"));
            return 0;
        }

        /// <summary>
        /// Executes the SDIFFSTORE command to store the difference of multiple sets.
        /// </summary>
        /// <param name="opts">The SDiffStoreOptions containing instance, destination, and keys.</param>
        /// <param name="config">The RedisManager configuration.</param>
        /// <returns>Exit code (0 for success, non-zero for failure).</returns>
        public static int RunSDiffStore(SDiffStoreOptions opts, Config config)
        {
            var instance = RedisUtils.GetInstance(config, opts.Instance);
            using var redis = RedisUtils.ConnectRedis(instance);
            var db = redis.GetDatabase();
            
            var keys = opts.Keys.Select(k => (RedisKey)k).ToArray();
            var count = db.SetCombineAndStore(SetOperation.Difference, opts.Destination, keys);
            
            if (opts.Table)
                RedisUtils.PrintTable(new[] { "Destination", "Stored Count" }, new List<string[]> { new[] { opts.Destination, count.ToString() } });
            else
                Console.WriteLine(Output.Green($"Stored {count} member(s) in {opts.Destination}"));
            return 0;
        }

        /// <summary>
        /// Executes the SSCAN command to scan set members.
        /// </summary>
        /// <param name="opts">The SScanOptions containing instance, key, cursor, and scan options.</param>
        /// <param name="config">The RedisManager configuration.</param>
        /// <returns>Exit code (0 for success, non-zero for failure).</returns>
        public static int RunSScan(SScanOptions opts, Config config)
        {
            var instance = RedisUtils.GetInstance(config, opts.Instance);
            using var redis = RedisUtils.ConnectRedis(instance);
            var db = redis.GetDatabase();
            
            var args = new List<object> { opts.Cursor };
            if (!string.IsNullOrEmpty(opts.Match))
            {
                args.Add("MATCH");
                args.Add(opts.Match);
            }
            if (opts.Count.HasValue)
            {
                args.Add("COUNT");
                args.Add(opts.Count.Value);
            }
            
            var result = db.Execute("SSCAN", opts.Key, args.ToArray());
            var arr = (RedisResult[])result;
            var newCursor = (int)arr[0];
            var members = (RedisResult[])arr[1];
            
            if (opts.Table)
            {
                var rows = members.Select(m => new[] { m.ToString() }).ToList();
                RedisUtils.PrintTable(new[] { "Member" }, rows);
                RedisUtils.PrintTable(new[] { "Next Cursor" }, new List<string[]> { new[] { newCursor.ToString() } });
            }
            else
            {
                foreach (var member in members)
                    Console.WriteLine(Output.Green(member.ToString()));
                Console.WriteLine(Output.Yellow($"Next cursor: {newCursor}"));
            }
            return 0;
        }

        /// <summary>
        /// Executes the SMOVE command to move a member from one set to another.
        /// </summary>
        /// <param name="opts">The SMoveOptions containing instance, source, destination, and member.</param>
        /// <param name="config">The RedisManager configuration.</param>
        /// <returns>Exit code (0 for success, non-zero for failure).</returns>
        public static int RunSMove(SMoveOptions opts, Config config)
        {
            var instance = RedisUtils.GetInstance(config, opts.Instance);
            using var redis = RedisUtils.ConnectRedis(instance);
            var db = redis.GetDatabase();
            
            var moved = db.SetMove(opts.Source, opts.Destination, opts.Member);
            
            if (opts.Table)
                RedisUtils.PrintTable(new[] { "Source", "Destination", "Member", "Moved" }, new List<string[]> { new[] { opts.Source, opts.Destination, opts.Member, moved.ToString() } });
            else
                Console.WriteLine(Output.Green(moved.ToString()));
            return 0;
        }
    }
}