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 List<string> imgList = new List<string>() { "tif", "tiff", "img", "mpt" };

        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})";

        // 模型-@cnName，model-@enName，自动发布模型-@name，http:// - @url，Tileset-@serve，1-@user，7-@pubid
        private static string insertLayerSql = "insert into lf.sys_layer (pid, cn_name, en_name, url, type, level, order_num, is_show, create_user, data_type, serve_type, pubid, elev) values ((select coalesce(id, 0) from lf.sys_layer where cn_name = @name limit 1), @cnName, @enName, @url, 2, (select coalesce(level, 0) + 1 from lf.sys_layer where cn_name = @name limit 1), (select coalesce(max(order_num), 0) + 1 from lf.sys_layer where pid = (select id from lf.sys_layer where cn_name = @name limit 1)), 0, @user, @name, @serve, @pubid, @elev);";

        private static string updateMetaSql = "update lf.sys_meta set path = @path where id = @id";

        /// <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 = Tools.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 = Tools.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 Tools.DBHelper.ExecuteNonQuery(sql);
        }

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

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

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

        /// <summary>
        /// 插入图层表记录
        /// </summary>
        public static int InsertLayer(SysPublish sys, SysMeta meta, double elev = 0)
        {
            bool isImg = imgList.Contains(meta.type);
            string cnName = meta.name.Split(new char[] { '.' })[0];
            string name = isImg ? "影像" : "自动发布模型";
            string serve = isImg ? (meta.type.Equals("mpt") ? "Mpt" : "TMS") : "Tileset";

            List<DbParameter> list = new List<DbParameter>();
            list.Add(new NpgsqlParameter("@cnName", cnName));
            list.Add(new NpgsqlParameter("@enName", meta.name));
            list.Add(new NpgsqlParameter("@name", name));
            list.Add(new NpgsqlParameter("@url", sys.url));
            list.Add(new NpgsqlParameter("@serve", serve));
            list.Add(new NpgsqlParameter("@pubid", sys.id));
            list.Add(new NpgsqlParameter("@user", sys.create_user));
            list.Add(new NpgsqlParameter("@elev", elev));

            int rows = Tools.DBHelper.ExecuteNonQuery(insertLayerSql, list.ToArray());

            return rows;
        }

        /// <summary>
        /// 更新元数据文件路径
        /// </summary>
        public static int UpdateMetaPath(SysMeta meta)
        {
            List<DbParameter> list = new List<DbParameter>();
            list.Add(new NpgsqlParameter("@id", meta.id));
            list.Add(new NpgsqlParameter("@path", meta.path));

            int rows = Tools.DBHelper.ExecuteNonQuery(updateMetaSql, list.ToArray());

            return rows;
        }

        /// <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;
        }
    }
}