using System;
using Microsoft.EntityFrameworkCore.Migrations;

#nullable disable

namespace Distribution.Migrations
{
    /// <inheritdoc />
    public partial class AddFreeIssueLines : Migration
    {
        /// <inheritdoc />
        protected override void Up(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.AddColumn<Guid>(
                name: "FK_SchemeId",
                table: "ShopPOItems",
                type: "char(36)",
                nullable: true,
                collation: "ascii_general_ci");

            migrationBuilder.AddColumn<bool>(
                name: "IsFree",
                table: "ShopPOItems",
                type: "tinyint(1)",
                nullable: false,
                defaultValue: false);

            migrationBuilder.AddColumn<string>(
                name: "SchemeName",
                table: "ShopPOItems",
                type: "longtext",
                nullable: true)
                .Annotation("MySql:CharSet", "utf8mb4");

            migrationBuilder.AddColumn<Guid>(
                name: "FK_SchemeId",
                table: "InvoiceItems",
                type: "char(36)",
                nullable: true,
                collation: "ascii_general_ci");

            migrationBuilder.AddColumn<bool>(
                name: "IsFree",
                table: "InvoiceItems",
                type: "tinyint(1)",
                nullable: false,
                defaultValue: false);

            migrationBuilder.AddColumn<string>(
                name: "SchemeName",
                table: "InvoiceItems",
                type: "longtext",
                nullable: true)
                .Annotation("MySql:CharSet", "utf8mb4");

            // Existing free-issue lines were plain zero-priced lines; flag them from their scheme redemption.
            migrationBuilder.Sql(@"
UPDATE ShopPOItems i
JOIN SchemeRedemptions r ON r.FK_ShopPOId = i.FK_ShopPOId AND r.FK_FreeItemId = i.FK_ItemId
JOIN Schemes s ON s.Id = r.FK_SchemeId
SET i.IsFree = 1, i.FK_SchemeId = r.FK_SchemeId, i.SchemeName = s.Name
WHERE i.UnitPrice = 0 AND i.IsActive = 1;");

            migrationBuilder.Sql(@"
UPDATE InvoiceItems ii
JOIN ShopPOItems pi ON ii.FK_ShopPOItemId = pi.Id
SET ii.IsFree = pi.IsFree, ii.FK_SchemeId = pi.FK_SchemeId, ii.SchemeName = pi.SchemeName
WHERE pi.IsFree = 1;");
        }

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

            migrationBuilder.DropColumn(
                name: "IsFree",
                table: "ShopPOItems");

            migrationBuilder.DropColumn(
                name: "SchemeName",
                table: "ShopPOItems");

            migrationBuilder.DropColumn(
                name: "FK_SchemeId",
                table: "InvoiceItems");

            migrationBuilder.DropColumn(
                name: "IsFree",
                table: "InvoiceItems");

            migrationBuilder.DropColumn(
                name: "SchemeName",
                table: "InvoiceItems");
        }
    }
}