namespace OASystem.API.OAMethodLib.GenericSearch
{

    /// <summary>
    /// 动态搜索请求
    /// </summary>
    public class DynamicSearchRequest
    {
        /// <summary>
        /// 搜索关键词
        /// </summary>
        public string Keyword { get; set; }

        /// <summary>
        /// 字段权重配置（字段名:权重值）
        /// </summary>
        public Dictionary<string, int> FieldWeights { get; set; } = new Dictionary<string, int>();

        /// <summary>
        /// 返回字段列表（为空则返回所有字段）
        /// </summary>
        public List<string> ReturnFields { get; set; } = new List<string>();

        /// <summary>
        /// 过滤条件
        /// </summary>
        public List<SearchFilter> Filters { get; set; } = new List<SearchFilter>();

        /// <summary>
        /// 排序字段
        /// </summary>
        public string OrderBy { get; set; }

        /// <summary>
        /// 是否降序排序
        /// </summary>
        public bool IsDescending { get; set; } = true;

        /// <summary>
        /// 页码（从1开始）
        /// </summary>
        public int PageIndex { get; set; } = 1;

        /// <summary>
        /// 页大小
        /// </summary>
        public int PageSize { get; set; } = 20;
    }

    /// <summary>
    /// 搜索过滤器
    /// </summary>
    public class SearchFilter
    {
        /// <summary>
        /// 字段名
        /// </summary>
        public string Field { get; set; }

        /// <summary>
        /// 操作符（eq, neq, contains, startswith, endswith, gt, gte, lt, lte, in）
        /// </summary>
        public string Operator { get; set; }

        /// <summary>
        /// 字段值
        /// </summary>
        public object Value { get; set; }

        /// <summary>
        /// 字段值列表（用于IN操作）
        /// </summary>
        public List<object> Values { get; set; }
    }

    /// <summary>
    /// 匹配字段信息
    /// </summary>
    public class MatchFieldInfo
    {
        /// <summary>
        /// 字段名
        /// </summary>
        public string FieldName { get; set; }

        /// <summary>
        /// 字段值
        /// </summary>
        public string FieldValue { get; set; }

        /// <summary>
        /// 匹配分数
        /// </summary>
        public int Score { get; set; }

        /// <summary>
        /// 匹配原因
        /// </summary>
        public string MatchReason { get; set; }
    }

    /// <summary>
    /// 搜索结果项（包含匹配度分数）
    /// </summary>
    /// <typeparam name="T">实体类型</typeparam>
    public class SearchResultItem<T>
    {
        /// <summary>
        /// 实体数据
        /// </summary>
        public T Data { get; set; }

        /// <summary>
        /// 匹配度分数
        /// </summary>
        public int MatchScore { get; set; }

        /// <summary>
        /// 匹配字段信息
        /// </summary>
        public List<MatchFieldInfo> MatchFields { get; set; } = new List<MatchFieldInfo>();
    }

    /// <summary>
    /// 搜索结果（应用层统计匹配度）
    /// </summary>
    /// <typeparam name="T">实体类型</typeparam>
    public class SearchResult<T>
    {
        /// <summary>
        /// 是否成功
        /// </summary>
        public bool Success { get; set; } = true;

        /// <summary>
        /// 消息
        /// </summary>
        public string Message { get; set; } = "搜索成功";

        /// <summary>
        /// 数据列表（包含匹配度信息）
        /// </summary>
        public List<SearchResultItem<T>> Items { get; set; } = new List<SearchResultItem<T>>();

        /// <summary>
        /// 总记录数
        /// </summary>
        public int TotalCount { get; set; }

        /// <summary>
        /// 搜索关键词
        /// </summary>
        public string Keyword { get; set; }

        /// <summary>
        /// 使用的字段权重配置
        /// </summary>
        public Dictionary<string, int> FieldWeights { get; set; }

        /// <summary>
        /// 返回的字段列表
        /// </summary>
        public List<string> ReturnFields { get; set; }

        /// <summary>
        /// 页码
        /// </summary>
        public int PageIndex { get; set; }

        /// <summary>
        /// 页大小
        /// </summary>
        public int PageSize { get; set; }

        /// <summary>
        /// 响应时间（毫秒）
        /// </summary>
        public long ResponseTime { get; set; }

        /// <summary>
        /// 搜索ID（用于追踪）
        /// </summary>
        public string SearchId { get; set; }
    }

    /// <summary>
    /// 字段信息
    /// </summary>
    public class FieldInfo
    {
        /// <summary>
        /// 字段名
        /// </summary>
        public string FieldName { get; set; }

        /// <summary>
        /// 显示名称
        /// </summary>
        public string DisplayName { get; set; }

        /// <summary>
        /// 数据类型
        /// </summary>
        public string DataType { get; set; }

        /// <summary>
        /// 是否可搜索
        /// </summary>
        public bool IsSearchable { get; set; }

        /// <summary>
        /// 默认权重
        /// </summary>
        public int DefaultWeight { get; set; }

        /// <summary>
        /// 字段描述
        /// </summary>
        public string Description { get; set; }

        /// <summary>
        /// 是否可过滤
        /// </summary>
        public bool CanFilter { get; set; } = true;

        /// <summary>
        /// 是否可排序
        /// </summary>
        public bool CanSort { get; set; } = true;
    }

    /// <summary>
    /// 搜索分析结果
    /// </summary>
    public class SearchAnalysis
    {
        /// <summary>
        /// 原始关键词
        /// </summary>
        public string OriginalKeyword { get; set; }

        /// <summary>
        /// 是否有特殊符号
        /// </summary>
        public bool HasSpecialSymbols { get; set; }

        /// <summary>
        /// 符号分割的段
        /// </summary>
        public List<string> SymbolSegments { get; set; } = new List<string>();

        /// <summary>
        /// 是否是单字
        /// </summary>
        public bool IsSingleChar { get; set; }

        /// <summary>
        /// 单字列表
        /// </summary>
        public List<char> SingleChars { get; set; } = new List<char>();

        /// <summary>
        /// 是否有搜索内容
        /// </summary>
        public bool HasSearchContent => HasSpecialSymbols || IsSingleChar;
    }
}