using Microsoft.EntityFrameworkCore.Infrastructure;
using Microsoft.EntityFrameworkCore.Migrations;

namespace FileService.Infrastructure.Migrations
{
    [DbContext(typeof(FileDbContext))]
    [Migration("20260909000300_AsyncUploadResult")]
    public partial class AsyncUploadResult : Migration
    {
        protected override void Up(MigrationBuilder migrationBuilder)
        {
            AlterStringColumns(migrationBuilder, narrowing: true);

            migrationBuilder.AddColumn<string>(
                name: "ChatType",
                table: "upload_files",
                type: "varchar(16)",
                maxLength: 16,
                nullable: true);

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

            migrationBuilder.AddColumn<Guid>(
                name: "SourceTaskId",
                table: "upload_files",
                type: "char(36)",
                nullable: true);

            migrationBuilder.AddColumn<Guid>(
                name: "TargetId",
                table: "upload_files",
                type: "char(36)",
                nullable: true);

            migrationBuilder.AddColumn<string>(
                name: "ChatType",
                table: "upload_tasks",
                type: "varchar(16)",
                maxLength: 16,
                nullable: true);

            migrationBuilder.AddColumn<string>(
                name: "FailureReason",
                table: "upload_tasks",
                type: "varchar(500)",
                maxLength: 500,
                nullable: true);

            migrationBuilder.AddColumn<Guid>(
                name: "ResultFileId",
                table: "upload_tasks",
                type: "char(36)",
                nullable: true);

            migrationBuilder.AddColumn<Guid>(
                name: "TargetId",
                table: "upload_tasks",
                type: "char(36)",
                nullable: true);

            migrationBuilder.CreateIndex(
                name: "IX_upload_files_SourceTaskId",
                table: "upload_files",
                column: "SourceTaskId",
                unique: true);

            migrationBuilder.CreateIndex(
                name: "IX_upload_files_checksum",
                table: "upload_files",
                columns: new[] { "checksum_algorithm", "checksum_value", "IsDeleted" });
        }

        protected override void Down(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.DropIndex("IX_upload_files_checksum", "upload_files");
            migrationBuilder.DropIndex("IX_upload_files_SourceTaskId", "upload_files");
            migrationBuilder.DropColumn("ChatType", "upload_files");
            migrationBuilder.DropColumn("IsPublic", "upload_files");
            migrationBuilder.DropColumn("SourceTaskId", "upload_files");
            migrationBuilder.DropColumn("TargetId", "upload_files");
            migrationBuilder.DropColumn("ChatType", "upload_tasks");
            migrationBuilder.DropColumn("FailureReason", "upload_tasks");
            migrationBuilder.DropColumn("ResultFileId", "upload_tasks");
            migrationBuilder.DropColumn("TargetId", "upload_tasks");
            AlterStringColumns(migrationBuilder, narrowing: false);
        }


        private static void AlterStringColumns(MigrationBuilder migrationBuilder, bool narrowing)
        {
            var columns = new (string Table, string Column, int Length, bool Nullable)[]
            {
                ("upload_files", "FileName", 255, false),
                ("upload_files", "ContentType", 255, false),
                ("upload_files", "checksum_algorithm", 16, false),
                ("upload_files", "checksum_value", 128, false),
                ("upload_files", "storage_provider", 64, false),
                ("upload_files", "storage_bucket", 255, false),
                ("upload_files", "storage_key", 1024, false),
                ("upload_files", "storage_region", 128, true),
                ("upload_tasks", "FileName", 255, false),
                ("upload_tasks", "ContentType", 255, false),
                ("upload_tasks", "checksum_algorithm", 16, false),
                ("upload_tasks", "checksum_value", 128, false),
                ("upload_tasks", "storage_provider", 64, false),
                ("upload_tasks", "storage_bucket", 255, false),
                ("upload_tasks", "storage_key", 1024, false),
                ("upload_tasks", "storage_region", 128, true)
            };

            foreach (var (table, column, length, nullable) in columns)
            {
                migrationBuilder.AlterColumn<string>(
                    name: column,
                    table: table,
                    type: narrowing ? $"varchar({length})" : "longtext",
                    maxLength: narrowing ? length : null,
                    nullable: nullable,
                    oldClrType: typeof(string),
                    oldType: narrowing ? "longtext" : $"varchar({length})",
                    oldMaxLength: narrowing ? null : length,
                    oldNullable: nullable);
            }
        }
    }
}