using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;
using System.Text.Json.Serialization;
using System.Threading.Tasks;

namespace OASystem.Domain.Entities.Resource
{
    /// <summary>
    /// 商邀公务AI
    /// </summary>
    [SugarTable("Res_InvitationAI", "商邀公务AI")]
    public class Res_InvitationAI: EntityBase
    {
        /// <summary>
        /// 名称
        /// </summary>
        [SugarColumn(ColumnName = "InvName", ColumnDescription = "名称", IsNullable = true, ColumnDataType = "varchar(150)")]
        public string InvName { get; set; }

        /// <summary>
        /// 团组ID
        /// 注：自定义命名时，GroupID = 0；使用团组名称时，GroupID = Grp_DelegationInfo.Id
        /// </summary>
        [SugarColumn(ColumnName = "GroupId", ColumnDescription = "团组ID", IsNullable = true, ColumnDataType = "int")]
        public int GroupId { get; set; }

        /// <summary>
        /// ai 抓取信息存储（含本地数据信息）
        /// </summary>
        [SugarColumn(ColumnName = "AiCrawledDetails", ColumnDescription = "ai 抓取信息存储（含本地数据信息）", IsJson = true, IsNullable = true, ColumnDataType = "varchar(max)")]
        public List<InvitationAIInfo> AiCrawledDetails { get; set; } = new List<InvitationAIInfo>();

        /// <summary>
        /// 词条信息
        /// </summary>
        [SugarColumn(ColumnName = "Entries", ColumnDescription = "词条信息", IsJson = true, IsNullable = true, ColumnDataType = "varchar(max)")]
        public EntryInfo EntryInfo { get; set; } = new EntryInfo();
    }

    /// <summary>
    /// 单位信息
    /// </summary>
    public class InvitationAIInfo
    {
        /// <summary>
        /// Guid
        /// </summary>
        public string Guid { get; set; }

        /// <summary>
        /// 复选框是否选中
        /// </summary>
        public bool IsChecked { get; set; } = false;

        /// <summary>
        /// 数据来源
        /// 0-本地数据；1-第三方AI接口数据；2-用户手动输入数据
        /// </summary>
        public int Source { get; set; } = 0;

        /// <summary>
        /// 归属区域
        /// </summary>
        public string Region { get; set; }

        /// <summary>
        /// 标准行业：信息技术、金融与财会、工业制造、医疗保健、政府与公共服务、消费与贸易
        /// </summary>
        public string Industry { get; set; }

        /// <summary>
        /// 名称(中文)
        /// </summary>
        public string NameCn { get; set; }
        /// <summary>
        /// 名称(英文)
        /// </summary>
        public string NameEn { get; set; }
        /// <summary>
        /// 地址
        /// </summary>
        public string Address { get; set; }
        /// <summary>
        /// 经营范围
        /// </summary>
        public string Scope { get; set; }
        /// <summary>
        /// 联系人
        /// </summary>
        public string Contact { get; set; }
        /// <summary>
        /// 联系电话
        /// </summary>
        public string Phone { get; set; }
        /// <summary>
        /// 联系邮箱
        /// </summary>
        public string Email { get; set; }
        /// <summary>
        /// 官网地址
        /// </summary>
        public string SiteUrl { get; set; }
        /// <summary>
        /// 文章地址
        /// </summary>
        public List<PostNewsItem> PostUrl { get; set; } = new List<PostNewsItem>();

        /// <summary>
        /// 推荐等级
        /// </summary>
        public string RecLevel { get; set; }

        /// <summary>
        /// 对接建议
        /// </summary>
        public string IntgAdvice { get; set; }

        /// <summary>
        /// 邮件信息
        /// </summary>
        public EmailInfo EmailInfo { get; set; } = new EmailInfo();

        /// <summary>
        /// 备注
        /// </summary>
        public string Remark { get; set; }

        /// <summary>
        /// 操作时间
        /// </summary>
        public DateTime OperatedAt { get; set; }
        /// <summary>
        /// 操作人
        /// </summary>
        public string Operator { get; set; }
    }

    /// <summary>
    /// 新闻链接信息
    /// </summary>
    public class PostNewsItem
    {
        public string Date { get; set; }
        public string Description { get; set; }
        public string Url { get; set; }
    }

    public class EntryInfo
    {
        /// <summary>
        /// 出访单位
        /// </summary>
        public string OriginUnit { get; set; }
        /// <summary>
        /// 拜访国家
        /// </summary>
        public List<string> TargetCountry { get; set; } = new List<string>();

        /// <summary>
        /// 行业信息
        /// 信息技术、金融与财会、工业制造、医疗保健、政府与公共服务、消费与贸易
        /// </summary>
        public List<string> Industries { get; set; } = new List<string>();

        /// <summary>
        /// 规模类型
        /// </summary>
        public List<string> ScaleTypes { get; set; } = new List<string>();

        /// <summary>
        /// 是否需要华人单位背景
        /// </summary>
        public bool IsBackground { get; set; } = false;

        /// <summary>
        /// 出访目的
        /// </summary>
        public string Objective { get; set; }
        /// <summary>
        /// 数据条数
        /// 每个国家获取数据总条数，默认10条
        /// </summary>
        public int NeedCount { get; set; } = 5;
        /// <summary>
        /// 其他规则
        /// </summary>
        public string OtherConstraints { get; set; }
        /// <summary>
        /// 操作时间
        /// </summary>
        public DateTime OperatedAt { get; set; } = new DateTime();
        /// <summary>
        /// 操作人
        /// </summary>
        public string Operator { get; set; }
    }

    public class EmailInfo
    {
        /// <summary>
        /// 邮件标题
        /// </summary>
        public string EmailTitle { get; set; }

        /// <summary>
        /// 邮箱内容
        /// </summary>
        public string EmailContent { get; set; }

        /// <summary>
        /// 发送状态
        /// 1.未开始
        /// 2.AI生成成功
        /// 3.手动编辑
        /// 4.发送完成
        /// 5.发送失败
        /// </summary>
        public int Status { get; set; } = 1;

        /// <summary>
        /// 操作时间
        /// </summary>
        public DateTime OperatedAt { get; set; }
        /// <summary>
        /// 操作人
        /// </summary>
        public string Operator { get; set; }
    }

    public class AICreateEmailInfo
    {

        public string Guid { get; set; }
        public string NameCn { get; set; }
        public string Scope { get; set; }
        public string Subject { get; set; }
        public string Content { get; set; }
    }

    public class CountryAIPormptInfo {
        public string Country { get; set; }
        public int Count { get; set; }
    }

    #region 行业信息

    /// <summary>
    /// 行业信息
    /// </summary>
    public class IndustryNode
    {
        public string Code { get; init; }
        public string NameCn { get; init; }
        public string NameEn { get; init; }
        public string ParentCode { get; init; }
        public List<IndustryNode> Children { get; init; } = new();
        public string Keywords { get; init; }

        public IndustryNode() { }

        /// <summary>
        /// 静态缓存：扁平化字典，用于 O(1) 效率查找
        /// </summary>
        private static readonly Dictionary<string, IndustryNode> _flatCache;
        public static List<IndustryNode> Roots { get; }

        static IndustryNode()
        {
            Roots = BuildInitialData();
            // 预先扁平化所有节点，方便后续根据 Code 查找
            _flatCache = Roots.SelectMany(GetSelfAndChildren).ToDictionary(x => x.Code);
        }

        /// <summary>
        /// 递归获取所有节点（平铺）
        /// </summary>
        private static IEnumerable<IndustryNode> GetSelfAndChildren(IndustryNode node)
        {
            yield return node;
            if (node.Children == null) yield break;
            foreach (var child in node.Children.SelectMany(GetSelfAndChildren))
                yield return child;
        }

        /// <summary>
        /// 快速查找节点 (O(1))
        /// </summary>
        public static IndustryNode FindByCode(string code) =>
            !string.IsNullOrEmpty(code) && _flatCache.TryGetValue(code, out var node) ? node : null;

        /// <summary>
        /// 初始化全球行业分类静态数据
        /// </summary>
        public static List<IndustryNode> BuildInitialData() => new()
        {
            new() { Code = "TECH", NameCn = "信息技术", NameEn = "Technology", Keywords = "IT,互联网,软件,AI", Children = new() {
                new() { Code = "TECH01", ParentCode = "TECH", NameCn = "软件开发与服务", NameEn = "Software & Services" },
                new() { Code = "TECH02", ParentCode = "TECH", NameCn = "硬件与半导体", NameEn = "Hardware & Semiconductors" },
                new() { Code = "TECH03", ParentCode = "TECH", NameCn = "人工智能与大数据", NameEn = "AI & Big Data" }
            }},
            new() { Code = "FIN", NameCn = "金融与财会", NameEn = "Financials", Keywords = "银行,保险,证券", Children = new() {
                new() { Code = "FIN01", ParentCode = "FIN", NameCn = "银行业", NameEn = "Banking" },
                new() { Code = "FIN02", ParentCode = "FIN", NameCn = "保险与风险管理", NameEn = "Insurance" },
                new() { Code = "FIN03", ParentCode = "FIN", NameCn = "资本市场与证券", NameEn = "Capital Markets" }
            }},
            new() { Code = "MANU", NameCn = "工业制造", NameEn = "Manufacturing", Keywords = "工厂,机械,自动化", Children = new() {
                new() { Code = "MANU01", ParentCode = "MANU", NameCn = "汽车与运输设备", NameEn = "Automotive" },
                new() { Code = "MANU02", ParentCode = "MANU", NameCn = "机械与电气设备", NameEn = "Machinery & Electrical" },
                new() { Code = "MANU03", ParentCode = "MANU", NameCn = "消费电子制造", NameEn = "Consumer Electronics" }
            }},
            new() { Code = "HLT", NameCn = "医疗保健", NameEn = "Healthcare", Keywords = "制药,医院,器械", Children = new() {
                new() { Code = "HLT01", ParentCode = "HLT", NameCn = "制药与生物技术", NameEn = "Pharmaceuticals & Biotech" },
                new() { Code = "HLT02", ParentCode = "HLT", NameCn = "医疗器械与供应", NameEn = "Medical Devices" },
                new() { Code = "HLT03", ParentCode = "HLT", NameCn = "医疗机构与诊所", NameEn = "Health Institutions" }
            }},
            new() { Code = "GOV", NameCn = "政府与公共服务", NameEn = "Government", Keywords = "行政,机关,组织,NGO", Children = new() {
                new() { Code = "GOV01", ParentCode = "GOV", NameCn = "政府行政机关", NameEn = "Administrative Bodies" },
                new() { Code = "GOV02", ParentCode = "GOV", NameCn = "国际组织与NGO", NameEn = "International Orgs & NGOs" },
                new() { Code = "GOV03", ParentCode = "GOV", NameCn = "公共教育与科研单位", NameEn = "Education & Research" }
            }},
            new() { Code = "CONS", NameCn = "消费与贸易", NameEn = "Consumer & Trade", Keywords = "零售,电商,物流", Children = new() {
                new() { Code = "CONS01", ParentCode = "CONS", NameCn = "电子商务与零售", NameEn = "E-commerce & Retail" },
                new() { Code = "CONS02", ParentCode = "CONS", NameCn = "物流与供应链", NameEn = "Logistics & Supply Chain" },
                new() { Code = "CONS03", ParentCode = "CONS", NameCn = "酒店与旅游餐饮", NameEn = "Hospitality & Tourism" }
            }}
        };
    }

    #endregion

    #region 单位规模信息

    /// <summary>
    /// 单位规模
    /// </summary>
    public class OrgScale
    {
        public string Label { get; init; }
        public int MinStaff { get; init; }
        public int MaxStaff { get; init; }

        public static List<OrgScale> GetScales() => new()
        {
            new() { Label = "微型 (1-10人)", MinStaff = 1, MaxStaff = 10 },
            new() { Label = "小型 (11-50人)", MinStaff = 11, MaxStaff = 50 },
            new() { Label = "中型 (51-200人)", MinStaff = 51, MaxStaff = 200 },
            new() { Label = "大型 (201-1000人)", MinStaff = 201, MaxStaff = 1000 },
            new() { Label = "超大型 (1000人以上)", MinStaff = 1001, MaxStaff = int.MaxValue }
        };

        /// <summary>
        /// 根据人数自动匹配规模标签
        /// </summary>
        public static string GetLabel(int count) =>
            GetScales().FirstOrDefault(s => count >= s.MinStaff && count <= s.MaxStaff)?.Label ?? "未知规模";
    }

    #endregion

    #region AI 行业匹配结果实体

    /// <summary>
    /// AI 行业匹配结果实体
    /// </summary>
    public class IndustryMatchResult
    {
        /// <summary>
        /// 原始出访单位名称
        /// </summary>
        public string SourceUnitName { get; set; } = string.Empty;

        /// <summary>
        /// 匹配到的目标单位名称（必须与输入 NameCn 一致）
        /// </summary>
        public string TargetUnitName { get; set; } = string.Empty;

        /// <summary>
        /// 目标单位所属国家
        /// </summary>
        public string TargetCountry { get; set; } = string.Empty;

        /// <summary>
        /// 识别出的行业分类（来自动态传入的行业标准）
        /// </summary>
        public string MatchedIndustry { get; set; } = string.Empty;

        /// <summary>
        /// 匹配置信度 (0.0 - 1.0)
        /// </summary>
        public double ConfidenceScore { get; set; }

        /// <summary>
        /// AI 给出的匹配理由说明
        /// </summary>
        public string MatchReason { get; set; } = string.Empty;

        // --- 辅助属性 (非 AI 返回内容) ---

        /// <summary>
        /// 判断是否为高价值匹配（业务逻辑判定）
        /// </summary>
        [JsonIgnore]
        public bool IsHighValue => ConfidenceScore >= 0.8;
    }
    #endregion
}