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

#nullable disable

namespace TakeoutSaaS.Infrastructure.Migrations.DictionaryDb
{
    /// <inheritdoc />
    public partial class AddSystemParametersTable : Migration
    {
        /// <inheritdoc />
        protected override void Up(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.CreateTable(
                name: "system_parameters",
                columns: table => new
                {
                    Id = table.Column<long>(type: "bigint", nullable: false, comment: "实体唯一标识。")
                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
                    Key = table.Column<string>(type: "character varying(128)", maxLength: 128, nullable: false, comment: "参数键，租户内唯一。"),
                    Value = table.Column<string>(type: "text", nullable: false, comment: "参数值，支持文本或 JSON。"),
                    Description = table.Column<string>(type: "character varying(512)", maxLength: 512, nullable: true, comment: "描述信息。"),
                    SortOrder = table.Column<int>(type: "integer", nullable: false, defaultValue: 100, comment: "排序值，越小越靠前。"),
                    IsEnabled = table.Column<bool>(type: "boolean", nullable: false, defaultValue: true, comment: "是否启用。"),
                    CreatedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: false, comment: "创建时间（UTC）。"),
                    UpdatedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: true, comment: "最近一次更新时间（UTC），从未更新时为 null。"),
                    DeletedAt = table.Column<DateTime>(type: "timestamp with time zone", nullable: true, comment: "软删除时间（UTC），未删除时为 null。"),
                    CreatedBy = table.Column<long>(type: "bigint", nullable: true, comment: "创建人用户标识，匿名或系统操作时为 null。"),
                    UpdatedBy = table.Column<long>(type: "bigint", nullable: true, comment: "最后更新人用户标识，匿名或系统操作时为 null。"),
                    DeletedBy = table.Column<long>(type: "bigint", nullable: true, comment: "删除人用户标识（软删除），未删除时为 null。"),
                    TenantId = table.Column<long>(type: "bigint", nullable: false, comment: "所属租户 ID。")
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_system_parameters", x => x.Id);
                },
                comment: "系统参数实体：支持按租户维护的键值型配置。");

            migrationBuilder.CreateIndex(
                name: "IX_system_parameters_TenantId",
                table: "system_parameters",
                column: "TenantId");

            migrationBuilder.CreateIndex(
                name: "IX_system_parameters_TenantId_Key",
                table: "system_parameters",
                columns: new[] { "TenantId", "Key" },
                unique: true);
        }

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