/* eslint-disable no-fallthrough */
/* eslint-disable @typescript-eslint/ban-ts-comment */
/**
 * JS Implementation of MurmurHash3 (r136) (as of May 20, 2011)
 *
 * @author <a href="mailto:gary.court@gmail.com">Gary Court</a>
 * @see http://github.com/garycourt/murmurhash-js
 * @author <a href="mailto:aappleby@gmail.com">Austin Appleby</a>
 * @see http://sites.google.com/site/murmurhash/
 *
 * @param {string} key ASCII only
 * @param {number} seed Positive integer only
 * @return {number} 32-bit positive integer hash
 */
export function murmurhash3_32_gc(key: string, seed = 0) {
    const remainder = key.length & 3; // key.length % 4
    const bytes = key.length - remainder;
    const c1 = 0xcc9e2d51;
    const c2 = 0x1b873593;
    let h1 = seed;
    let i = 0;
    let k1 = 0;
    let h1b = 0;
    while (i < bytes) {
        k1 =
            (key.charCodeAt(i) & 0xff) |
            ((key.charCodeAt(++i) & 0xff) << 8) |
            ((key.charCodeAt(++i) & 0xff) << 16) |
            ((key.charCodeAt(++i) & 0xff) << 24);
        ++i;

        k1 = ((k1 & 0xffff) * c1 + ((((k1 >>> 16) * c1) & 0xffff) << 16)) & 0xffffffff;
        k1 = (k1 << 15) | (k1 >>> 17);
        k1 = ((k1 & 0xffff) * c2 + ((((k1 >>> 16) * c2) & 0xffff) << 16)) & 0xffffffff;

        h1 ^= k1;
        h1 = (h1 << 13) | (h1 >>> 19);
        h1b = ((h1 & 0xffff) * 5 + ((((h1 >>> 16) * 5) & 0xffff) << 16)) & 0xffffffff;
        h1 = (h1b & 0xffff) + 0x6b64 + ((((h1b >>> 16) + 0xe654) & 0xffff) << 16);
    }

    k1 = 0;
    switch (remainder) {
        // @ts-expect-error
        case 3:
            k1 ^= (key.charCodeAt(i + 2) & 0xff) << 16;
        // @ts-expect-error
        case 2:
            k1 ^= (key.charCodeAt(i + 1) & 0xff) << 8;
        case 1:
            k1 ^= key.charCodeAt(i) & 0xff;

            k1 = ((k1 & 0xffff) * c1 + ((((k1 >>> 16) * c1) & 0xffff) << 16)) & 0xffffffff;
            k1 = (k1 << 15) | (k1 >>> 17);
            k1 = ((k1 & 0xffff) * c2 + ((((k1 >>> 16) * c2) & 0xffff) << 16)) & 0xffffffff;
            h1 ^= k1;
    }

    h1 ^= key.length;

    h1 ^= h1 >>> 16;
    h1 = ((h1 & 0xffff) * 0x85ebca6b + ((((h1 >>> 16) * 0x85ebca6b) & 0xffff) << 16)) & 0xffffffff;
    h1 ^= h1 >>> 13;
    h1 = ((h1 & 0xffff) * 0xc2b2ae35 + ((((h1 >>> 16) * 0xc2b2ae35) & 0xffff) << 16)) & 0xffffffff;
    h1 ^= h1 >>> 16;

    return h1 >>> 0;
}