using Microsoft.EntityFrameworkCore.Migrations;

#nullable disable

namespace Data.SeaHavenIndustries.Migrations
{
    /// <summary>
    /// SH-393: board-created work orders with a vendor stored their primary dispatch with
    /// no WorkOrderId and no DispatchWorkOrders link, so every owned-or-linked read (uplift
    /// list, allowance, approval queue WO number, dispatch patches) missed it. Data-only
    /// heal: assign the dispatch to the single work order that names it as primary. Rows
    /// already owned or linked, and dispatches named primary by more than one work order,
    /// are left untouched, so re-running is a no-op.
    /// </summary>
    public partial class SH393_BackfillBoardCreatedDispatchWorkOrder : Migration
    {
        /// <inheritdoc />
        protected override void Up(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.Sql(
                """
                UPDATE d
                SET d.[WorkOrderId] = w.[Id]
                FROM [Dispatches] AS d
                INNER JOIN [workOrders] AS w ON w.[PrimaryDispatchId] = d.[Id]
                WHERE d.[WorkOrderId] IS NULL
                  AND NOT EXISTS (
                      SELECT 1 FROM [DispatchWorkOrders] AS l
                      WHERE l.[DispatchId] = d.[Id])
                  AND (
                      SELECT COUNT(*) FROM [workOrders] AS owner
                      WHERE owner.[PrimaryDispatchId] = d.[Id]) = 1;
                """);
        }

        /// <inheritdoc />
        protected override void Down(MigrationBuilder migrationBuilder)
        {
            // The heal is not reversible: healed rows are indistinguishable from dispatches
            // that were created with their work order set.
        }
    }
}