using Microsoft.EntityFrameworkCore;
using SqlSugar;
using System;
using System.Collections.Generic;
using System.Linq;
using VolPro.Core.Configuration;
using VolPro.Core.DBManager;
using VolPro.Core.Enums;
using VolPro.Core.Extensions;
using VolPro.Core.ManageUser;
using VolPro.Core.UserManager;
using VolPro.Entity.DomainModels;

namespace VolPro.Core.Tenancy
{
    public static class TenancySqlExpression
    {
        /// <summary>
        /// 注意：数据库表中必须包括appsettings.json配置文件UserIdField的字段才会进行数据隔离。如果表没有这些字段，请在上面单独写过滤逻辑
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="query"></param>
        ///  <param name="checkAdmin">是否对管理员帐号也做验证</param>
        /// <returns></returns>
        public static string CreateTenancySqlFilter(this string tableName, string selectSql,
            List<SearchParameters> filters, List<SugarParameter> parameters, string leftQuote = "", string rightQuote = "")
        {
            filters ??= new List<SearchParameters>();

            // 统一到菜单表名，避免传入真实表名(TableTrueName)时权限匹配失败
            string permissionTableName = ResolvePermissionTableName(tableName);
            bool isUserTable = permissionTableName.Equals(nameof(Sys_User), StringComparison.OrdinalIgnoreCase);

            string filterCreateId = isUserTable ? "User_Id" : AppSetting.CreateMember?.UserIdField;
            if (string.IsNullOrWhiteSpace(filterCreateId))
            {
                filterCreateId = "CreateId";
            }

            if (AppSetting.UserAuth)
            {
                int[] userIds = UserContext.Current.GetCurrentUserAuthUserIds(permissionTableName);
                if (userIds?.Length > 0)
                {
                    // 对应 QueryTenancyDynamicShareDBFilter：直接写入 filters 供 BuildWhere 生成 IN
                    AddInFilter(filters, filterCreateId, userIds);
                    return selectSql;
                }
            }

            var roleIds = UserContext.Current.RoleIds ?? Array.Empty<int>();
            var permission = UserContext.Current.GetPermissions(permissionTableName.ToLower()) ?? new Permissions();

            // 自定义数据权限：对应 QueryCustom，转换成 SearchParameters 直接放入 filters
            if (permission.CustomAuth != null)
            {
                AddCustomFilters(filters, permission.CustomAuth);
                return selectSql;
            }

            List<int> authDataTypes;
            if (!string.IsNullOrEmpty(permission.AuthMenuData))
            {
                authDataTypes = new List<int> { permission.AuthMenuData.GetInt() };
            }
            else
            {
                authDataTypes = RoleContext.GetRoles(x => roleIds.Contains(x.Id))
                    .Where(x => x.AuthData > 0)
                    .Select(s => s.AuthData)
                    .ToList();
            }

            if (!isUserTable && authDataTypes.Count == 0)
            {
                return selectSql;
            }

            if (!isUserTable &&
                (authDataTypes.Contains((int)AuthData.本组织及下数据) || authDataTypes.Contains((int)AuthData.本组织数据)))
            {
                var deptIds = UserContext.Current.DeptIds;
                var userDeptQuery = DBServerProvider.DbContext.Set<Sys_UserDepartment>().Where(x => x.Enable == 1);
                if (authDataTypes.Contains((int)AuthData.本组织及下数据))
                {
                    var childDeptIds = DepartmentContext.GetAllChildrenIds(deptIds);
                    userDeptQuery = userDeptQuery.Where(x => childDeptIds.Contains(x.DepartmentId));
                }
                else
                {
                    userDeptQuery = userDeptQuery.Where(x => deptIds.Contains(x.DepartmentId));
                }

                var deptUserIds = userDeptQuery.Select(s => s.UserId).Distinct().Take(5000).ToArray();
                AddInFilter(filters, filterCreateId, deptUserIds);
                return selectSql;
            }

            if (isUserTable ||
                authDataTypes.Contains((int)AuthData.本角色以及下数据) ||
                authDataTypes.Contains((int)AuthData.本角色数据))
            {
                var userRoleQuery = DBServerProvider.DbContext.Set<Sys_UserRole>()
                    .Where(x => x.Enable == 1 && x.RoleId > 1);

                if (isUserTable || authDataTypes.Contains((int)AuthData.本角色以及下数据))
                {
                    var childRoleIds = RoleContext.GetAllChildrenIds(roleIds);
                    userRoleQuery = userRoleQuery.Where(x => childRoleIds.Contains(x.RoleId));
                }
                else
                {
                    userRoleQuery = userRoleQuery.Where(x => roleIds.Contains(x.RoleId));
                }

                var roleUserIds = userRoleQuery.Select(s => s.UserId).Distinct().Take(5000).ToArray();
                AddInFilter(filters, filterCreateId, roleUserIds);
                return selectSql;
            }

            if (authDataTypes.Contains((int)AuthData.仅自己数据))
            {
                filters.Add(new SearchParameters
                {
                    Name = filterCreateId,
                    Value = UserContext.Current.UserId.ToString(),
                    DisplayType = "="
                });
            }

            return selectSql;
        }

        private static string ResolvePermissionTableName(string tableName)
        {
            //var tableInfo = TableColumnContext.TableInfo.FirstOrDefault(x =>
            //    string.Equals(x.TableName, tableName, StringComparison.OrdinalIgnoreCase)
            //    || string.Equals(x.TableTrueName, tableName, StringComparison.OrdinalIgnoreCase));
            //return tableInfo?.TableName ?? tableName;
            return tableName;
        }

        private static void AddInFilter(List<SearchParameters> filters, string fieldName, IEnumerable<int> userIds)
        {
            if (string.IsNullOrWhiteSpace(fieldName) || userIds == null)
            {
                return;
            }
            var ids = userIds.Distinct().ToArray();
            if (ids.Length == 0)
            {
                return;
            }
            filters.Add(new SearchParameters
            {
                Name = fieldName,
                Value = string.Join(",", ids),
                DisplayType = "in"
            });
        }

        private static void AddCustomFilters(List<SearchParameters> filters, List<Dictionary<string, string>> list)
        {
            if (list == null || list.Count == 0)
            {
                return;
            }
            foreach (var item in list)
            {
                if (!item.TryGetValue("field", out var field) || string.IsNullOrWhiteSpace(field))
                {
                    continue;
                }
                if (!item.TryGetValue("value", out var value) || string.IsNullOrWhiteSpace(value))
                {
                    continue;
                }
                value = value.Trim();
                item.TryGetValue("filterType", out var filterType);
                item.TryGetValue("valueType", out var valueType);

                // valueType=1: 当前用户上下文字段替换
                if (valueType == "1")
                {
                    switch (value)
                    {
                        case "User_Id":
                            filters.Add(new SearchParameters { Name = field, Value = UserContext.Current.UserId.ToString(), DisplayType = "eq" });
                            break;
                        case "RoleIds":
                            AddInStringFilter(filters, field, UserContext.Current.RoleIds.Select(s => s.ToString()));
                            break;
                        case "DeptIds":
                            AddInStringFilter(filters, field, UserContext.Current.DeptIds.Select(s => s.ToString()));
                            break;
                        default:
                            var property = typeof(UserInfo).GetProperty(value);
                            var userInfoVal = property?.GetValue(UserContext.Current.UserInfo);
                            if (userInfoVal != null)
                            {
                                filters.Add(new SearchParameters
                                {
                                    Name = field,
                                    Value = userInfoVal.ToString(),
                                    DisplayType = MapDisplayType(filterType, false)
                                });
                            }
                            break;
                    }
                    continue;
                }

                bool isListValue = value.Contains(",");
                bool isIn = string.Equals(filterType, "in", StringComparison.OrdinalIgnoreCase);
                bool isNotEqual = string.Equals(filterType, "!=", StringComparison.OrdinalIgnoreCase);
                if (isIn || isNotEqual || isListValue)
                {
                    var vals = value.Split(',', StringSplitOptions.RemoveEmptyEntries).Select(s => s.Trim()).ToArray();
                    if (vals.Length == 0)
                    {
                        continue;
                    }
                    filters.Add(new SearchParameters
                    {
                        Name = field,
                        Value = string.Join(",", vals),
                        DisplayType = isIn ? "in" : "notin"
                    });
                    continue;
                }

                filters.Add(new SearchParameters
                {
                    Name = field,
                    Value = value,
                    DisplayType = MapDisplayType(filterType, false)
                });
            }
        }

        private static void AddInStringFilter(List<SearchParameters> filters, string field, IEnumerable<string> values)
        {
            if (string.IsNullOrWhiteSpace(field) || values == null)
            {
                return;
            }
            var list = values.Where(s => !string.IsNullOrWhiteSpace(s)).Distinct().ToArray();
            if (list.Length == 0)
            {
                return;
            }
            filters.Add(new SearchParameters
            {
                Name = field,
                Value = string.Join(",", list),
                DisplayType = "in"
            });
        }

        private static string MapDisplayType(string filterType, bool defaultLike)
        {
            switch (filterType)
            {
                case "小于":
                    filterType = "<";
                    break;
                default:
                    break;
            }
            return filterType;
        }
    }
}