using Microsoft.EntityFrameworkCore.Migrations;

#nullable disable

namespace Data.SeaHavenIndustries.Migrations
{
    /// <inheritdoc />
    public partial class SH198_VendorCompanyNotesAndRowVersion : Migration
    {
        /// <inheritdoc />
        protected override void Up(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.AddColumn<string>(
                name: "Notes",
                table: "VendorCompanies",
                type: "nvarchar(max)",
                nullable: true);

            migrationBuilder.AddColumn<byte[]>(
                name: "RowVersion",
                table: "VendorCompanies",
                type: "rowversion",
                rowVersion: true,
                nullable: true);

            // Backfill VendorCompany.Notes (vendor-directory source) deterministically
            // from the most recently modified then highest-id nonempty Vendor.Notes.
            // Vendor.Notes is retained separately for work-order editor compatibility;
            // roster/directory paths read VendorCompany.Notes.
            migrationBuilder.Sql(@"
;WITH SourceNotes AS (
    SELECT
        v.[CompanyId],
        v.[Notes],
        ROW_NUMBER() OVER (
            PARTITION BY v.[CompanyId]
            ORDER BY
                v.[LastModificationTime] DESC,
                v.[Id] DESC
        ) AS [RowNumber]
    FROM [Vendors] v
    WHERE v.[CompanyId] IS NOT NULL
      AND v.[Notes] IS NOT NULL
      AND LTRIM(RTRIM(v.[Notes])) <> ''
)
UPDATE vc
SET vc.[Notes] = src.[Notes]
FROM [VendorCompanies] vc
INNER JOIN SourceNotes src
    ON src.[CompanyId] = vc.[Id]
WHERE src.[RowNumber] = 1;
");
        }

        /// <inheritdoc />
        protected override void Down(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.DropColumn(
                name: "Notes",
                table: "VendorCompanies");

            migrationBuilder.DropColumn(
                name: "RowVersion",
                table: "VendorCompanies");
        }
    }
}