// Copyright (C) 2026, Stichting Mapcode Foundation (http://www.mapcode.com)

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

// http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

import { DataModel } from "./data-model.js";

const DATA_MODEL = DataModel.getInstance();

export class Data {

static readonly ENCODE_CHARS = [

"0","1","2","3","4","5","6","7","8","9",

"B","C","D","F","G","H","J","K","L","M",

"N","P","Q","R","S","T","V","W","X","Y","Z",

"A","E","U",

];

static readonly TERRITORY_RECORD_TYPE_NONE = 0;

static readonly TERRITORY_RECORD_TYPE_PIPE = 1;

static readonly TERRITORY_RECORD_TYPE_PLUS = 2;

static readonly TERRITORY_RECORD_TYPE_STAR = 3;

static isNameless(r: number): boolean { return (DATA_MODEL.getDataFlags(r) & 64) !== 0; }

static isSpecialShape(r: number): boolean { return (DATA_MODEL.getDataFlags(r) & 1024) !== 0; }

static getTerritoryRecordType(r: number): number { return (DATA_MODEL.getDataFlags(r) >> 7) & 3; }

static isRestricted(r: number): boolean { return (DATA_MODEL.getDataFlags(r) & 512) !== 0; }

static getCodex(r: number): number {

const codexflags = DATA_MODEL.getDataFlags(r) & 31;

return 10 * Math.trunc(codexflags / 5) + (codexflags % 5) + 1;

}

static headerLetter(i: number): string {

const flags = DATA_MODEL.getDataFlags(i);

if (((flags >> 7) & 3) === 1) return Data.ENCODE_CHARS[(flags >> 11) & 31];

return "";

}

}