using ExportMap.cs;
using ExportMap.Models;
using Npgsql;
using System;
using System.Collections.Generic;
using System.Data.Common;
using System.Linq;
using System.Reflection;
using System.Web;

namespace ExportMap.db
{
    public class PubDBHelper
    {
        private static string insertPublishSql = "insert into lf.sys_publish(name, url, path, type, status, dirid, depid, min, max, json, create_user, geom, bak) values (@name, @url, @path, @type, @status, @dirid, @depid, @min, @max, @json, @create_user, {0}, @bak) returning id";

        private static string insertMetaPubSql = "insert into lf.sys_meta_pub (metaid, pubid, create_user) select {0}, {1}, {2} from (select 1) temp where not exists (select 1 from lf.sys_meta_pub where metaid = {0} and pubid = {1})";

        /// <summary>
        /// 是/否发布过
        /// </summary>
        public static bool IsPublish(int metaid)
        {
            string sql = "select count(*) from lf.sys_meta_pub a inner join lf.sys_publish b on a.pubid = b.id where a.metaid = " + metaid;

            object obj = Tool.DBHelper.GetScalar(sql);
            int count = obj == null ? 0 : Convert.ToInt32(obj);

            return count > 0;
        }

        /// <summary>
        /// 是/否发布过
        /// </summary>
        public static bool IsPublish(string dirid)
        {
            string sql = "select count(*) from lf.sys_meta_pub a inner join lf.sys_publish b on a.pubid = b.id where b.type = 'DOM' and b.dirid = @dirid";
            DbParameter dp = new NpgsqlParameter("@dirid", dirid);

            object obj = Tool.DBHelper.GetScalar(sql, dp);
            int count = obj == null ? 0 : Convert.ToInt32(obj);

            return count > 0;
        }

        /// <summary>
        /// 插入元数据-数据发布表记录
        /// </summary>
        public static int InsertMetaPub(int metaid, int pubid, int userId)
        {
            string sql = string.Format(insertMetaPubSql, metaid, pubid, userId);

            return Tool.DBHelper.ExecuteNonQuery(sql);
        }

        /// <summary>
        /// 插入数据发布表记录
        /// </summary>
        /// <returns></returns>
        public static int InsertPublish(SysPublish sys)
        {
            List<DbParameter> list = Tool.GetParams<SysPublish>(insertPublishSql, sys);
            string sql = string.Format(insertPublishSql, sys.geom == null ? "null" : sys.geom);

            object obj = Tool.DBHelper.GetScalar(sql, list.ToArray());

            return obj == null ? 0 : Convert.ToInt32(obj);
        }

        /// <summary>
        /// 获取参数列表
        /// </summary>
        public static List<DbParameter> GetParams<T>(string sql, T t)
        {
            List<DbParameter> list = new List<DbParameter>();
            Type tType = typeof(T);
            BindingFlags flags = BindingFlags.Public | BindingFlags.IgnoreCase | BindingFlags.Instance;

            int start = sql.IndexOf("@");
            while (start != -1)
            {
                int end = sql.IndexOf(",", start);
                if (end == -1) end = sql.IndexOf(")", start);
                if (end == -1) end = sql.IndexOf(" ", start);
                if (end == -1) end = sql.Length;

                string name = sql.Substring(start + 1, end - start - 1);
                PropertyInfo pi = tType.GetProperty(name, flags);
                if (pi != null)
                {
                    object value = pi.GetValue(t, null);
                    DbParameter dp = new NpgsqlParameter("@" + name, value);
                    list.Add(dp);
                }

                start = sql.IndexOf("@", end);
            }

            return list;
        }
    }
}