using System.Text;
using Domain.Admin.Admin;
using Domain.Admin.Admin.ENum;

namespace AdminHost.Middleware
{
    public class OperationLogMiddleware
    {
        private readonly RequestDelegate _next;
        private readonly ILogger<OperationLogMiddleware> _logger;

        public OperationLogMiddleware(RequestDelegate next, ILogger<OperationLogMiddleware> logger)
        {
            _next = next;
            _logger = logger;
        }

        public async Task InvokeAsync(HttpContext context, Domain.Admin.Admin.IAdminOperationLogService logService)
        {
            var path = context.Request.Path.Value ?? "";
            var method = context.Request.Method;
            
            bool shouldLog = path.StartsWith("/adminapi", StringComparison.OrdinalIgnoreCase) ||
                            path.StartsWith("/api/Admin", StringComparison.OrdinalIgnoreCase);
            
            if (!shouldLog)
            {
                await _next(context);
                return;
            }

            if (path.Contains("/login", StringComparison.OrdinalIgnoreCase) || 
                path.Contains("/GetAccessToken", StringComparison.OrdinalIgnoreCase))
            {
                await _next(context);
                return;
            }
            
            string? requestBody = null;
            
            if (method == "POST" || method == "PUT")
            {
                context.Request.EnableBuffering();
                using var reader = new StreamReader(context.Request.Body, Encoding.UTF8, leaveOpen: true);
                requestBody = await reader.ReadToEndAsync();
                context.Request.Body.Position = 0;
            }

            var startTime = DateTime.Now;
            string? ip = GetClientIp(context);
            string? adminId = null;
            string? adminName = null;

            if (context.User.Identity?.IsAuthenticated == true)
            {
                adminId = context.User.FindFirst("uid")?.Value;
                adminName = context.User.FindFirst("dname")?.Value 
                            ?? context.User.FindFirst(System.Security.Claims.ClaimTypes.Name)?.Value;
            }

            if (adminId == "administrator" || adminName == "administrator")
            {
                await _next(context);
                return;
            }

            int statusCode = 200;
            
            try
            {
                await _next(context);
                statusCode = context.Response.StatusCode;
            }
            catch (Exception ex)
            {
                statusCode = 500;
                _logger.LogError(ex, "请求处理异常");
                throw;
            }

            _ = Task.Run(async () =>
            {
                try
                {
                    var log = new AdminOperationLog
                    {
                        AdminId = adminId,
                        AdminName = adminName,
                        Module = (int)GetModuleFromPath(path),
                        ActionType = GetActionType(method, path),
                        Description = $"{GetActionType(method, path)} - {path}",
                        HttpMethod = method,
                        RequestPath = path,
                        RequestParams = requestBody?.Length > 4000 ? requestBody[..4000] : requestBody,
                        Response = null,
                        Ip = ip,
                        Status = statusCode >= 200 && statusCode < 400 ? 1 : 0,
                        OperateTime = startTime
                    };

                    await logService.AddLog(log);
                }
                catch (Exception ex)
                {
                    _logger.LogError(ex, "记录操作日志失败");
                }
            });
        }

        private static string? GetClientIp(HttpContext context)
        {
            var ip = context.Request.Headers["X-Forwarded-For"].FirstOrDefault();
            if (string.IsNullOrEmpty(ip))
            {
                ip = context.Connection.RemoteIpAddress?.ToString();
            }
            return ip;
        }

        private static EnumOperationModule GetModuleFromPath(string path)
        {
            if (path.Contains("/AdminUser", StringComparison.OrdinalIgnoreCase))
                return EnumOperationModule.User;
            if (path.Contains("/Customer", StringComparison.OrdinalIgnoreCase))
                return EnumOperationModule.Customer;
            if (path.Contains("/BeautifulNumber", StringComparison.OrdinalIgnoreCase))
                return EnumOperationModule.BeautifulNumber;
            if (path.Contains("/Notice", StringComparison.OrdinalIgnoreCase))
                return EnumOperationModule.Notice;
            if (path.Contains("/Task", StringComparison.OrdinalIgnoreCase))
                return EnumOperationModule.Task;
            if (path.Contains("/GameConfig", StringComparison.OrdinalIgnoreCase))
                return EnumOperationModule.GameConfig;
            if (path.Contains("/Room", StringComparison.OrdinalIgnoreCase))
                return EnumOperationModule.Room;
            if (path.Contains("/System/user", StringComparison.OrdinalIgnoreCase) || 
                path.Contains("/system/user", StringComparison.OrdinalIgnoreCase))
                return EnumOperationModule.SystemUser;
            if (path.Contains("/System/role", StringComparison.OrdinalIgnoreCase) || 
                path.Contains("/system/role", StringComparison.OrdinalIgnoreCase))
                return EnumOperationModule.Role;
            if (path.Contains("/System/nav", StringComparison.OrdinalIgnoreCase) || 
                path.Contains("/system/nav", StringComparison.OrdinalIgnoreCase))
                return EnumOperationModule.Navigation;
            if (path.Contains("/System/dic", StringComparison.OrdinalIgnoreCase) || 
                path.Contains("/system/dic", StringComparison.OrdinalIgnoreCase))
                return EnumOperationModule.Dictionary;
            
            return EnumOperationModule.Other;
        }

        private static string GetActionType(string method, string path)
        {
            if (path.Contains("/Ban", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/ban", StringComparison.OrdinalIgnoreCase))
                return "封号";
            if (path.Contains("/Unban", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/unban", StringComparison.OrdinalIgnoreCase))
                return "解封";
            if (path.Contains("/Batch", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/batch", StringComparison.OrdinalIgnoreCase))
                return "批量操作";
            if (path.Contains("/Email", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/email", StringComparison.OrdinalIgnoreCase))
                return "发送邮件";
            if (path.Contains("/Init", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/init", StringComparison.OrdinalIgnoreCase))
                return "初始化";
            if (path.Contains("/Freeze", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/freeze", StringComparison.OrdinalIgnoreCase))
                return "冻结";
            if (path.Contains("/Unfreeze", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/unfreeze", StringComparison.OrdinalIgnoreCase))
                return "解冻";
            if (path.Contains("/Give", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/give", StringComparison.OrdinalIgnoreCase))
                return "赠送";
            if (path.Contains("/Clear", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/clear", StringComparison.OrdinalIgnoreCase))
                return "清空";
            if (path.Contains("/Robot", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/robot", StringComparison.OrdinalIgnoreCase))
                return "机器人管理";
            if (path.Contains("/state", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/State", StringComparison.OrdinalIgnoreCase))
                return "设置状态";
            if (path.Contains("/icon", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/Icon", StringComparison.OrdinalIgnoreCase))
                return "修改头像";
            if (path.Contains("/list", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/List", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/GetAll", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/getall", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/Get", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/get", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/check", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/Check", StringComparison.OrdinalIgnoreCase))
                return "查询";
            if (path.Contains("/add", StringComparison.OrdinalIgnoreCase) || 
                path.Contains("/create", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/Add", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/Create", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/send", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/Send", StringComparison.OrdinalIgnoreCase))
                return "新增";
            if (path.Contains("/update", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/edit", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/Update", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/Edit", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/set-", StringComparison.OrdinalIgnoreCase))
                return "修改";
            if (path.Contains("/delete", StringComparison.OrdinalIgnoreCase) ||
                path.Contains("/Delete", StringComparison.OrdinalIgnoreCase))
                return "删除";
            
            return method switch
            {
                "GET" => "查询",
                "POST" => "新增",
                "PUT" => "修改",
                "DELETE" => "删除",
                _ => "操作"
            };
        }
    }

    public static class OperationLogMiddlewareExtensions
    {
        public static IApplicationBuilder UseOperationLog(this IApplicationBuilder builder)
        {
            return builder.UseMiddleware<OperationLogMiddleware>();
        }
    }
}