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

namespace RedisManager.Commands
{
    [Verb("module-load", HelpText = "Load a Redis module.")]
    public class ModuleLoadOptions
    {
        [Option('i', "instance", Required = true, HelpText = "Instance name.")]
        public string Instance { get; set; }
        [Value(0, MetaName = "path", Required = true, HelpText = "Module path.")]
        public string Path { get; set; }
        [Value(1, MetaName = "args", HelpText = "Module arguments.")]
        public IEnumerable<string> Args { get; set; }
    }

    [Verb("module-unload", HelpText = "Unload a Redis module.")]
    public class ModuleUnloadOptions
    {
        [Option('i', "instance", Required = true, HelpText = "Instance name.")]
        public string Instance { get; set; }
        [Value(0, MetaName = "name", Required = true, HelpText = "Module name.")]
        public string Name { get; set; }
    }

    [Verb("module-list", HelpText = "List loaded Redis modules.")]
    public class ModuleListOptions
    {
        [Option('i', "instance", Required = true, HelpText = "Instance name.")]
        public string Instance { get; set; }
    }

    public static class ModuleCommands
    {
        public static int RunModuleLoad(ModuleLoadOptions opts, Config config)
        {
            var instance = RedisUtils.GetInstance(config, opts.Instance);
            using var redis = RedisUtils.ConnectRedis(instance);
            var db = redis.GetDatabase();

            try
            {
                var args = new List<object> { "LOAD", opts.Path };
                if (opts.Args != null)
                    args.AddRange(opts.Args);
                var result = db.Execute("MODULE", args.ToArray());
                Console.WriteLine(Output.Green($"Module loaded: {result}"));
                return 0;
            }
            catch (Exception ex)
            {
                Console.WriteLine(Output.Red($"Failed to load module: {ex.Message}"));
                return 1;
            }
        }

        public static int RunModuleUnload(ModuleUnloadOptions opts, Config config)
        {
            var instance = RedisUtils.GetInstance(config, opts.Instance);
            using var redis = RedisUtils.ConnectRedis(instance);
            var db = redis.GetDatabase();

            try
            {
                var result = db.Execute("MODULE", new object[] { "UNLOAD", opts.Name });
                Console.WriteLine(Output.Green($"Module unloaded: {result}"));
                return 0;
            }
            catch (Exception ex)
            {
                Console.WriteLine(Output.Red($"Failed to unload module: {ex.Message}"));
                return 1;
            }
        }

        public static int RunModuleList(ModuleListOptions opts, Config config)
        {
            var instance = RedisUtils.GetInstance(config, opts.Instance);
            using var redis = RedisUtils.ConnectRedis(instance);
            var db = redis.GetDatabase();

            try
            {
                var result = db.Execute("MODULE", new object[] { "LIST" });
                Console.WriteLine(Output.Green($"Module list: {result}"));
                return 0;
            }
            catch (Exception ex)
            {
                Console.WriteLine(Output.Red($"Failed to list modules: {ex.Message}"));
                return 1;
            }
        }
    }
}