import { concatenateArrayBuffers } from '@loaders.gl/loader-utils';
export const signature = new Uint8Array([0x01, 0x00]);
/**
 * creates zip64 extra field
 * @param options info that can be placed into zip64 field
 * @returns buffer with field
 */
export function createZip64Info(options) {
    const optionsToUse = {
        ...options,
        zip64Length: (options.offset ? 1 : 0) * 8 + (options.size ? 1 : 0) * 16
    };
    const arraysToConcat = [];
    for (const field of ZIP64_FIELDS) {
        if (!optionsToUse[field.name ?? ''] && !field.default) {
            continue; // eslint-disable-line no-continue
        }
        const newValue = new DataView(new ArrayBuffer(field.size));
        NUMBER_SETTERS[field.size](newValue, 0, optionsToUse[field.name ?? ''] ?? field.default);
        arraysToConcat.push(newValue.buffer);
    }
    return concatenateArrayBuffers(...arraysToConcat);
}
/**
 * Writes values into buffer according to the bytes amount
 * @param header header where to write the data
 * @param fieldSize size of the field in bytes
 * @param fieldOffset offset of the field
 * @param value value to be written
 */
export function setFieldToNumber(header, fieldSize, fieldOffset, value) {
    NUMBER_SETTERS[fieldSize](header, Number(fieldOffset), value);
}
/** functions to write values into buffer according to the bytes amount */
const NUMBER_SETTERS = {
    2: (header, offset, value) => {
        header.setUint16(offset, Number(value > 0xffff ? 0xffff : value), true);
    },
    4: (header, offset, value) => {
        header.setUint32(offset, Number(value > 0xffffffff ? 0xffffffff : value), true);
    },
    8: (header, offset, value) => {
        header.setBigUint64(offset, BigInt(value), true);
    }
};
/** zip64 info fields description, we need it as a pattern to build a zip64 info */
const ZIP64_FIELDS = [
    // Header ID 0x0001
    {
        size: 2,
        default: new DataView(signature.buffer).getUint16(0, true)
    },
    // Size of the extra field chunk (8, 16, 24 or 28)
    {
        size: 2,
        name: 'zip64Length'
    },
    // Original uncompressed file size
    {
        size: 8,
        name: 'size'
    },
    // Size of compressed data
    {
        size: 8,
        name: 'size'
    },
    // Offset of local header record
    {
        size: 8,
        name: 'offset'
    }
];