const asn1js = require("asn1js");

const base64Str = "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";

// Convert base64 string to buffer
const bufferObj = Buffer.from(base64Str, "base64");

async function decodeData_parse() {
    // Parse ASN.1 structure
    const asn1 = asn1js.ASN1.fromBER(bufferObj);
    const ret = asn1.result.valueBlock;

    const {
        INTEGER,
        OID,
        PRIMITIVES,
        OCTET_STRING,
        CONSTRUCTED_BIT_STRING,
        CONSTRUCTED_OID,
    } = parseActivationTicket(ret);

    console.log({
        OCTET_STRING,
        BASE64: Buffer.from(OCTET_STRING).toString("base64"),
        HEX: Buffer.from(OCTET_STRING).toString("hex"),
    });

    const SET$ = [];
    let IMEI = null;
    let MEID = false;

    for (const [i, item] of PRIMITIVES.entries()) {
        if (item.tagNumber == 1003 || item.tagNumber == 1007) {
            MEID = true;
        }

        if (item.tagNumber == 1005) {
            let hexString = "";
            for (let i = 0; i < item.valueHex.length; i++) {
                const hexValue = item.valueHex[i].toString(16);
                hexString += hexValue.padStart(2, "0");
            }
            IMEI = hexString;
        }

        SET$.push(
            new asn1js.Primitive({
                idBlock: {
                    tagClass: item.idBlock.tagClass,
                    tagNumber: item.idBlock.tagNumber,
                },
                valueHex: item.valueHex,
            })
        );
    }

    const mountDefaultSequence = {
        name: "ConstructedValueBlock",
        value: [
            new asn1js.Integer({ valueHex: INTEGER }),
            new asn1js.Sequence({
                value: [
                    new asn1js.ObjectIdentifier({ value: OID }),
                ],
            }),
            new asn1js.Set({ value: SET$ }),
            new asn1js.OctetString({ value: OCTET_STRING }),
            new asn1js.Constructed({
                identifieForm: true,
                idBlock: {
                    tagClass: 1,
                    tagNumber: 1,
                },
                value: [
                    new asn1js.Sequence({
                        value: [
                            new asn1js.ObjectIdentifier({ value: CONSTRUCTED_OID }),
                        ],
                    }),
                    new asn1js.BitString({ isHexOnly: true, valueHex: CONSTRUCTED_BIT_STRING }),
                ],
            }),
        ],
    };

    const ticketGSM = new asn1js.Sequence(mountDefaultSequence);
    const encoded = Buffer.from(ticketGSM.toBER()).toString("base64");

    const ticketMEID = new asn1js.Sequence(mountDefaultSequence);

    if (!MEID) {
        for (const [i, item] of ticketMEID.toJSON().valueBlock.value[2].valueBlock.value.entries()) {
            if (item.idBlock.tagNumber == 1005) {
                mountDefaultSequence.value[2].value.splice(
                    i + 1,
                    0,
                    new asn1js.Primitive({
                        idBlock: { tagClass: 1, tagNumber: 1007 },
                        valueHex: await payloadToUint8Array("35321810693143"),
                    })
                );
            }
        }
    }

    if (!MEID) {
        for (const [i, item] of ticketGSM.toJSON().valueBlock.value[2].valueBlock.value.entries()) {
            if (item.idBlock.tagNumber == 1005) {
                mountDefaultSequence.value[2].value.splice(i, 1);
            }
        }
    }

    if (!MEID) {
        for (const [i, item] of ticketMEID.toJSON().valueBlock.value[2].valueBlock.value.entries()) {
            if (item.idBlock.tagNumber == 1007) {
                mountDefaultSequence.value[2].value.splice(
                    i + 1,
                    0,
                    new asn1js.Primitive({
                        idBlock: { tagClass: 1, tagNumber: 1005 },
                        valueHex: await payloadToUint8Array("35321810693143"),
                    })
                );
            }
        }
    }

    const encoded_meid = Buffer.from(ticketMEID.toBER()).toString("base64");

    const TICKET = {
        OID,
        IMEI,
        POSSIBLE_MEID: MEID,
        VALIDATE_BUILD: base64Str === encoded,
        TICKET_ORIGINAL: base64Str,
        TICKET_BUILD: encoded,
        TICKET_MEID: !MEID ? encoded_meid : "TICKET_ORIGINAL AND TICKET_BUILD IS MEID",
    };
	
async function payloadToUint8Array(payload) {
    // Convert the payload to a Uint8Array
    const uint8Array = new TextEncoder().encode(payload);
    return uint8Array;
}
    console.log("ticket", ticketGSM.toString());
    console.log(TICKET);
}

async function parseActivationTicket(payload) {
    const INTEGER = payload.integerValue;
    const OID = payload.oidValue;
    const PRIMITIVES = payload.primitiveValues;
    const OCTET_STRING = payload.octetStringValue;
    const CONSTRUCTED_BIT_STRING = payload.constructedBitStringValue;
    const CONSTRUCTED_OID = payload.constructedOIDValue;

    return { INTEGER, OID, PRIMITIVES, OCTET_STRING, CONSTRUCTED_BIT_STRING, CONSTRUCTED_OID };
}