using CloudBuilder.Core.Authorization;
using CloudBuilder.Core.DatabaseAccessor.Entity;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
namespace CloudBuilder.Master.Entity
 {
    [TypeScript]
    [Table("article")]
    public class ArticleEntity : ViewEntityBase
    {

    public ArticleEntity() 
    {
    }

    [Column("created_datetime")]
    public DateTime CreatedDatetime  { get; set; }
    [Column("created_by")]
    public string CreatedBy  { get; set; }
    [Column("updated_datetime")]
    public DateTime UpdatedDatetime  { get; set; }
    [Column("updated_by")]
    public string UpdatedBy  { get; set; }
    [Key]
    [Column("article_name")]
    public string ArticleName  { get; set; }
    [Column("article_title")]
    public string ArticleTitle  { get; set; }
    [Column("brief")]
    public string? Brief  { get; set; }
    [Column("article_cover_filename")]
    public string? ArticleCoverFilename  { get; set; }
    [Column("approved_indc")]
    public string? ApprovedIndc  { get; set; }
    [Column("top_indc")]
    public string? TopIndc  { get; set; }
    [Column("order_by")]
    public int OrderBy  { get; set; }

    public const string CREATED_DATETIME = "CreatedDatetime";
    public const string CREATED_BY = "CreatedBy";
    public const string UPDATED_DATETIME = "UpdatedDatetime";
    public const string UPDATED_BY = "UpdatedBy";
    public const string ARTICLE_NAME = "ArticleName";
    public const string ARTICLE_TITLE = "ArticleTitle";
    public const string BRIEF = "Brief";
    public const string ARTICLE_COVER_FILENAME = "ArticleCoverFilename";
    public const string APPROVED_INDC = "ApprovedIndc";
    public const string TOP_INDC = "TopIndc";
    public const string ORDER_BY = "OrderBy";

    public const string DB_NAME_ARTICLE = "article";
    public const string DB_NAME_FIELDS="created_datetime,created_by,updated_datetime,updated_by,article_name,article_title,brief,article_cover_filename,approved_indc,top_indc,order_by";

    public const string DB_CREATED_DATETIME = "created_datetime";
    public const string DB_CREATED_BY = "created_by";
    public const string DB_UPDATED_DATETIME = "updated_datetime";
    public const string DB_UPDATED_BY = "updated_by";
    public const string DB_ARTICLE_NAME = "article_name";
    public const string DB_ARTICLE_TITLE = "article_title";
    public const string DB_BRIEF = "brief";
    public const string DB_ARTICLE_COVER_FILENAME = "article_cover_filename";
    public const string DB_APPROVED_INDC = "approved_indc";
    public const string DB_TOP_INDC = "top_indc";
    public const string DB_ORDER_BY = "order_by";

    private string ProviderName { get; set; }

    public static ArticleEntity GetInstance(string providerName)
    {
        return new ArticleEntity() { ProviderName = providerName };
    }

    public virtual void CopyFrom(ArticleEntity source)
    {
        CopyFrom(source, true);
    }

    public virtual void CopyFrom(ArticleEntity source, bool includeSystemFields)
    {
        if (source == null)
        {
            throw new NullReferenceException("Source entity is null.");
        }

        this.CreatedDatetime =  source.CreatedDatetime;
        this.CreatedBy =  source.CreatedBy;
        this.UpdatedDatetime =  source.UpdatedDatetime;
        this.UpdatedBy =  source.UpdatedBy;
        this.ArticleName =  source.ArticleName;
        this.ArticleTitle =  source.ArticleTitle;
        this.Brief =  source.Brief;
        this.ArticleCoverFilename =  source.ArticleCoverFilename;
        this.ApprovedIndc =  source.ApprovedIndc;
        this.TopIndc =  source.TopIndc;
        this.OrderBy =  source.OrderBy;

        if (includeSystemFields)
        {
        this.CreatedDatetime =  source.CreatedDatetime;
        this.CreatedBy =  source.CreatedBy;
        this.UpdatedDatetime =  source.UpdatedDatetime;
        this.UpdatedBy =  source.UpdatedBy;
        }
    }

    public override string GetSelectFrom()
    {
        if (ProviderName.Contains("MySql"))
        {
            return GetSelectFromByMySql();
        }
        else if (ProviderName.Contains("SqlServer"))
        {
            return GetSelectFromByBySqlServer();
        }
        else
        {
            throw new NotSupportedException($"不支持的数据库提供程序:{ProviderName}");
        }
    }
    public  string GetSelectFromByMySql()
    {
        return $" select {DB_NAME_FIELDS} from { DB_NAME_ARTICLE}  with(nolock) ";
    }
    public  string GetSelectFromByBySqlServer()
    {
        return $" select {DB_NAME_FIELDS} from { DB_NAME_ARTICLE}   ";
    }

    public override string GetSelectCountFrom(string sqlWhere)
    {
        if (ProviderName.Contains("MySql"))
        {
            return GetSelectCountFromByMySql(sqlWhere);
        }
        else if (ProviderName.Contains("SqlServer"))
        {
            return GetSelectCountFromBySqlServer(sqlWhere);
        }
        else
        {
            throw new NotSupportedException($"不支持的数据库提供程序:{ProviderName}");
        }
    }

    public  string GetSelectCountFromByMySql(string sqlWhere)
    {
        return $" select count(*) from { DB_NAME_ARTICLE}   where 1=1 {sqlWhere}";
    }
    public  string GetSelectCountFromBySqlServer(string sqlWhere)
    {
        return $" select count(*) from { DB_NAME_ARTICLE}  with(nolock) where 1=1 {sqlWhere}";
    }

	public override string GetSelectTopFrom(int limit, int start, string orderby, string orderbytag, string sqlWhere)
    {
        if (ProviderName.Contains("MySql"))
        {
            return GetSelectTopFromByMySql(limit, start, orderby, orderbytag, sqlWhere);
        }
        else if (ProviderName.Contains("SqlServer"))
        {
            return GetSelectTopFromBySqlServer(limit, start, orderby, orderbytag, sqlWhere);
        }
        else
        {
            throw new NotSupportedException($"不支持的数据库提供程序:{ProviderName}");
        }
    }

    public  string GetSelectTopFromByMySql(int limit, int start,string orderby,string orderbytag,  string sqlWhere)
    {
            if (string.IsNullOrEmpty(orderbytag)  || orderbytag.Trim() != "desc") orderbytag = "asc";
            if (string.IsNullOrEmpty(orderby) || !DB_NAME_FIELDS.Contains(orderby)) orderby =  DB_ARTICLE_NAME ;  		
		int offset = limit * (start - 1);
        return $" select {DB_NAME_FIELDS} from (select {DB_NAME_FIELDS}  ,row_number() over(order by {orderby} {orderbytag}) as num from { DB_NAME_ARTICLE}   where 1=1 {sqlWhere} ) a where num> {offset} LIMIT {limit} ";
    }

    public  string GetSelectTopFromBySqlServer(int limit, int start,string orderby,string orderbytag,  string sqlWhere)
    {
            if (string.IsNullOrEmpty(orderbytag)  || orderbytag.Trim() != "desc") orderbytag = "asc";
            if (string.IsNullOrEmpty(orderby) || !DB_NAME_FIELDS.Contains(orderby)) orderby =  DB_ARTICLE_NAME ;  		
		string top = limit > 0 ? $"top {limit}" : "";
        return $" select {top} {DB_NAME_FIELDS} from (select {DB_NAME_FIELDS}  ,row_number() over(order by {orderby} {orderbytag}) as num from { DB_NAME_ARTICLE}  with(nolock) where 1=1 {sqlWhere} ) a where num> {limit * (start - 1)}";
    }

    public ArticleEntity Clone()
    {
        ArticleEntity result = new ArticleEntity();
        result.CopyFrom(this);

        return result;
    }

    }
}