/*
 * Copyright 2008 ZXing authors
 *
 * 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.
 */

/*namespace com.google.zxing.common {*/

import Exception from './../Exception';

/*import java.util.HashMap;*/
/*import java.util.Map;*/

export const enum CharacterSetValueIdentifiers {
    Cp437,
    ISO8859_1,
    ISO8859_2,
    ISO8859_3,
    ISO8859_4,
    ISO8859_5,
    ISO8859_6,
    ISO8859_7,
    ISO8859_8,
    ISO8859_9,
    ISO8859_10,
    ISO8859_11,
    ISO8859_13,
    ISO8859_14,
    ISO8859_15,
    ISO8859_16,
    SJIS,
    Cp1250,
    Cp1251,
    Cp1252,
    Cp1256,
    UnicodeBigUnmarked,
    UTF8,
    ASCII,
    Big5,
    GB18030,
    EUC_KR,
}

/**
 * Encapsulates a Character Set ECI, according to "Extended Channel Interpretations" 5.3.1.1
 * of ISO 18004.
 *
 * @author Sean Owen
 */

export default class CharacterSetECI {

    private static VALUE_IDENTIFIER_TO_ECI = new Map<number, CharacterSetECI>();
    private static VALUES_TO_ECI = new Map<number, CharacterSetECI>();
    private static NAME_TO_ECI = new Map<string, CharacterSetECI>();

    // Enum name is a Java encoding valid for java.lang and java.io
    // TYPESCRIPTPORT: changed the main label for ISO as the TextEncoder did not recognized them in the form from java
    // (eg ISO8859_1 must be ISO88591 or ISO8859-1 or ISO-8859-1)
    // later on: well, except 16 wich does not work with ISO885916 so used ISO-8859-1 form for default
    public static readonly Cp437 = new CharacterSetECI(
        CharacterSetValueIdentifiers.Cp437, Int32Array.from([0, 2]), 'Cp437');

    public static readonly ISO8859_1 = new CharacterSetECI(
        CharacterSetValueIdentifiers.ISO8859_1, Int32Array.from([1, 3]), 'ISO-8859-1', 'ISO88591', 'ISO8859_1');

    public static readonly ISO8859_2 = new CharacterSetECI(
        CharacterSetValueIdentifiers.ISO8859_2, 4, 'ISO-8859-2', 'ISO88592', 'ISO8859_2');

    public static readonly ISO8859_3 = new CharacterSetECI(
        CharacterSetValueIdentifiers.ISO8859_3, 5, 'ISO-8859-3', 'ISO88593', 'ISO8859_3');

    public static readonly ISO8859_4 = new CharacterSetECI(
        CharacterSetValueIdentifiers.ISO8859_4, 6, 'ISO-8859-4', 'ISO88594', 'ISO8859_4');

    public static readonly ISO8859_5 = new CharacterSetECI(
        CharacterSetValueIdentifiers.ISO8859_5, 7, 'ISO-8859-5', 'ISO88595', 'ISO8859_5');

    public static readonly ISO8859_6 = new CharacterSetECI(
        CharacterSetValueIdentifiers.ISO8859_6, 8, 'ISO-8859-6', 'ISO88596', 'ISO8859_6');

    public static readonly ISO8859_7 = new CharacterSetECI(
        CharacterSetValueIdentifiers.ISO8859_7, 9, 'ISO-8859-7', 'ISO88597', 'ISO8859_7');

    public static readonly ISO8859_8 = new CharacterSetECI(
        CharacterSetValueIdentifiers.ISO8859_8, 10, 'ISO-8859-8', 'ISO88598', 'ISO8859_8');

    public static readonly ISO8859_9 = new CharacterSetECI(
        CharacterSetValueIdentifiers.ISO8859_9, 11, 'ISO-8859-9', 'ISO88599', 'ISO8859_9');

    public static readonly ISO8859_10 = new CharacterSetECI(
        CharacterSetValueIdentifiers.ISO8859_10, 12, 'ISO-8859-10', 'ISO885910', 'ISO8859_10');

    public static readonly ISO8859_11 = new CharacterSetECI(
        CharacterSetValueIdentifiers.ISO8859_11, 13, 'ISO-8859-11', 'ISO885911', 'ISO8859_11');

    public static readonly ISO8859_13 = new CharacterSetECI(
        CharacterSetValueIdentifiers.ISO8859_13, 15, 'ISO-8859-13', 'ISO885913', 'ISO8859_13');

    public static readonly ISO8859_14 = new CharacterSetECI(
        CharacterSetValueIdentifiers.ISO8859_14, 16, 'ISO-8859-14', 'ISO885914', 'ISO8859_14');

    public static readonly ISO8859_15 = new CharacterSetECI(
        CharacterSetValueIdentifiers.ISO8859_15, 17, 'ISO-8859-15', 'ISO885915', 'ISO8859_15');

    public static readonly ISO8859_16 = new CharacterSetECI(
        CharacterSetValueIdentifiers.ISO8859_16, 18, 'ISO-8859-16', 'ISO885916', 'ISO8859_16');

    public static readonly SJIS = new CharacterSetECI(
        CharacterSetValueIdentifiers.SJIS, 20, 'SJIS', 'Shift_JIS');

    public static readonly Cp1250 = new CharacterSetECI(
        CharacterSetValueIdentifiers.Cp1250, 21, 'Cp1250', 'windows-1250');

    public static readonly Cp1251 = new CharacterSetECI(
        CharacterSetValueIdentifiers.Cp1251, 22, 'Cp1251', 'windows-1251');

    public static readonly Cp1252 = new CharacterSetECI(
        CharacterSetValueIdentifiers.Cp1252, 23, 'Cp1252', 'windows-1252');

    public static readonly Cp1256 = new CharacterSetECI(
        CharacterSetValueIdentifiers.Cp1256, 24, 'Cp1256', 'windows-1256');

    public static readonly UnicodeBigUnmarked = new CharacterSetECI(
        CharacterSetValueIdentifiers.UnicodeBigUnmarked, 25, 'UnicodeBigUnmarked', 'UTF-16BE', 'UnicodeBig');

    public static readonly UTF8 = new CharacterSetECI(
        CharacterSetValueIdentifiers.UTF8, 26, 'UTF8', 'UTF-8');

    public static readonly ASCII = new CharacterSetECI(
        CharacterSetValueIdentifiers.ASCII, Int32Array.from([27, 170]), 'ASCII', 'US-ASCII');

    public static readonly Big5 = new CharacterSetECI(
        CharacterSetValueIdentifiers.Big5, 28, 'Big5');

    public static readonly GB18030 = new CharacterSetECI(
        CharacterSetValueIdentifiers.GB18030, 29, 'GB18030', 'GB2312', 'EUC_CN', 'GBK');

    public static readonly EUC_KR = new CharacterSetECI(
        CharacterSetValueIdentifiers.EUC_KR, 30, 'EUC_KR', 'EUC-KR');

    public values: Int32Array;
    public otherEncodingNames: string[];

    public constructor(
        public valueIdentifier: CharacterSetValueIdentifiers,
        valuesParam: Int32Array | number,
        public name: string, ...otherEncodingNames: string[]
    ) {

        if (typeof valuesParam === 'number') {
            this.values = Int32Array.from([valuesParam]);
        } else {
            this.values = valuesParam;
        }

        this.otherEncodingNames = otherEncodingNames;

        CharacterSetECI.VALUE_IDENTIFIER_TO_ECI.set(valueIdentifier, this);
        CharacterSetECI.NAME_TO_ECI.set(name, this);

        const values = this.values;

        for (let i = 0, length = values.length; i !== length; i++) {
            const v = values[i];
            CharacterSetECI.VALUES_TO_ECI.set(v, this);
        }
        for (const otherName of otherEncodingNames) {
            CharacterSetECI.NAME_TO_ECI.set(otherName, this);
        }
    }

    // CharacterSetECI(value: number /*int*/) {
    //   this(new Int32Array {value})
    // }

    // CharacterSetECI(value: number /*int*/, String... otherEncodingNames) {
    //   this.values = new Int32Array {value}
    //   this.otherEncodingNames = otherEncodingNames
    // }

    // CharacterSetECI(values: Int32Array, String... otherEncodingNames) {
    //   this.values = values
    //   this.otherEncodingNames = otherEncodingNames
    // }

    public getValueIdentifier(): CharacterSetValueIdentifiers/*int*/ {
        return this.valueIdentifier;
    }

    public getName(): string {
        return this.name;
    }

    public getValue(): number /*int*/ {
        return this.values[0];
    }

    /**
     * @param value character set ECI value
     * @return {@code CharacterSetECI} representing ECI of given value, or null if it is legal but
     *   unsupported
     * @throws FormatException if ECI value is invalid
     */
    public static getCharacterSetECIByValue(value: number /*int*/): CharacterSetECI /*throws FormatException*/ {

        if (value < 0 || value >= 900) {
            throw new Exception(Exception.FormatException, 'incorect value');
        }

        const characterSet = CharacterSetECI.VALUES_TO_ECI.get(value);

        if (undefined === characterSet) {
            throw new Exception(Exception.FormatException, 'incorect value');
        }

        return characterSet;
    }

    /**
     * @param name character set ECI encoding name
     * @return CharacterSetECI representing ECI for character encoding, or null if it is legal
     *   but unsupported
     */
    public static getCharacterSetECIByName(name: string): CharacterSetECI {

        const characterSet = CharacterSetECI.NAME_TO_ECI.get(name);

        if (undefined === characterSet) {
            throw new Exception(Exception.FormatException, 'incorect value');
        }

        return characterSet;
    }

    public equals(o: CharacterSetECI) {

        if (!(o instanceof CharacterSetECI)) {
            return false;
        }

        const other = o as CharacterSetECI;

        return this.getName() === other.getName();
    }

}