using Microsoft.EntityFrameworkCore.Migrations;

#nullable disable

namespace Infrastructure.Migrations.AppDb;

/// <inheritdoc />
public partial class NormalizeChannelHandleStripAtPrefix : Migration
{
    /// <inheritdoc />
    protected override void Up(MigrationBuilder migrationBuilder)
    {
        // 기존 저장된 Channel.Handle 값에서 '@' 접두사 제거 (canonical form 통일)
        migrationBuilder.Sql(@"
                UPDATE [Channel]
                SET [Handle] = STUFF([Handle], 1, 1, '')
                WHERE [Handle] LIKE N'@%';
            ");

        // 이력 테이블도 방어적 정규화
        migrationBuilder.Sql(@"
                UPDATE [ChannelHandleHistory]
                SET [OldHandle] = STUFF([OldHandle], 1, 1, '')
                WHERE [OldHandle] LIKE N'@%';
            ");
    }

    /// <inheritdoc />
    protected override void Down(MigrationBuilder migrationBuilder)
    {
        // 데이터 정규화는 되돌릴 수 없음 (원본 '@' 접두사 유무를 기억하지 않음) — no-op
    }
}