using System;
using Microsoft.EntityFrameworkCore.Migrations;
using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;

#nullable disable

namespace DD.Persistence.Database.Postgres.Migrations.PersistencePostgres
{
    /// <inheritdoc />
    public partial class ParameterDataMigration : Migration
    {
        /// <inheritdoc />
        protected override void Up(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.CreateTable(
                name: "ParameterData",
                columns: table => new
                {
                    DiscriminatorId = table.Column<Guid>(type: "uuid", nullable: false, comment: "Дискриминатор системы"),
                    ParameterId = table.Column<int>(type: "integer", nullable: false, comment: "Id параметра")
                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
                    Timestamp = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false, comment: "Временная отметка"),
                    Value = table.Column<string>(type: "varchar(256)", nullable: true, comment: "Значение параметра в виде строки")
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_ParameterData", x => new { x.DiscriminatorId, x.ParameterId, x.Timestamp });
                });

            string sql;
            for (int i = 1; i <= 25; i++)
            {
                sql = $"create table if not exists \"ParameterData{i}\" (like public.\"ParameterData\" including all) inherits (public.\"ParameterData\");";
                migrationBuilder.Sql(sql);
            }

            //sql = "create or replace function partition_for_parameter_data() returns trigger as $$ " +
            //    "DECLARE " +
            //    "    v_parition_name text; " +
            //    "BEGIN " +
            //    "    v_parition_name := format( 'ParameterData%s', NEW.\"ParameterId\" / 1000 ); " +
            //    "    execute 'INSERT INTO public.\"' || v_parition_name || '\" VALUES ( ($1).* )' USING NEW; " +
            //    "    return NULL; " +
            //    "END; " +
            //    "$$ language plpgsql;";
            //migrationBuilder.Sql(sql);

            //sql = "create or replace trigger partition_parameter_data " +
            //    "before insert on public.\"ParameterData\" " +
            //    "for each row execute procedure public.partition_for_parameter_data();";
            //migrationBuilder.Sql(sql);
        }

        /// <inheritdoc />
        protected override void Down(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.DropTable(
                name: "ParameterData");
        }
    }
}