// Ported from js-yaml v3.13.1:
// Copyright 2011-2015 by Vitaly Puzrin. All rights reserved. MIT license.
// https://github.com/nodeca/js-yaml/commit/665aadda42349dcae869f12040d9b10ef18d12da
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
import { Type } from "../type.js";
import { Buffer } from "../../../io/buffer.js";
// [ 64, 65, 66 ] -> [ padding, CR, LF ]
const BASE64_MAP = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\n\r";
function resolveYamlBinary(data) {
    if (data === null)
        return false;
    let code;
    let bitlen = 0;
    const max = data.length;
    const map = BASE64_MAP;
    // Convert one by one.
    for (let idx = 0; idx < max; idx++) {
        code = map.indexOf(data.charAt(idx));
        // Skip CR/LF
        if (code > 64)
            continue;
        // Fail on illegal characters
        if (code < 0)
            return false;
        bitlen += 6;
    }
    // If there are any bits left, source was corrupted
    return bitlen % 8 === 0;
}
function constructYamlBinary(data) {
    // remove CR/LF & padding to simplify scan
    const input = data.replace(/[\r\n=]/g, "");
    const max = input.length;
    const map = BASE64_MAP;
    // Collect by 6*4 bits (3 bytes)
    const result = [];
    let bits = 0;
    for (let idx = 0; idx < max; idx++) {
        if (idx % 4 === 0 && idx) {
            result.push((bits >> 16) & 0xff);
            result.push((bits >> 8) & 0xff);
            result.push(bits & 0xff);
        }
        bits = (bits << 6) | map.indexOf(input.charAt(idx));
    }
    // Dump tail
    const tailbits = (max % 4) * 6;
    if (tailbits === 0) {
        result.push((bits >> 16) & 0xff);
        result.push((bits >> 8) & 0xff);
        result.push(bits & 0xff);
    }
    else if (tailbits === 18) {
        result.push((bits >> 10) & 0xff);
        result.push((bits >> 2) & 0xff);
    }
    else if (tailbits === 12) {
        result.push((bits >> 4) & 0xff);
    }
    return new Buffer(new Uint8Array(result));
}
function representYamlBinary(object) {
    const max = object.length;
    const map = BASE64_MAP;
    // Convert every three bytes to 4 ASCII characters.
    let result = "";
    let bits = 0;
    for (let idx = 0; idx < max; idx++) {
        if (idx % 3 === 0 && idx) {
            result += map[(bits >> 18) & 0x3f];
            result += map[(bits >> 12) & 0x3f];
            result += map[(bits >> 6) & 0x3f];
            result += map[bits & 0x3f];
        }
        bits = (bits << 8) + object[idx];
    }
    // Dump tail
    const tail = max % 3;
    if (tail === 0) {
        result += map[(bits >> 18) & 0x3f];
        result += map[(bits >> 12) & 0x3f];
        result += map[(bits >> 6) & 0x3f];
        result += map[bits & 0x3f];
    }
    else if (tail === 2) {
        result += map[(bits >> 10) & 0x3f];
        result += map[(bits >> 4) & 0x3f];
        result += map[(bits << 2) & 0x3f];
        result += map[64];
    }
    else if (tail === 1) {
        result += map[(bits >> 2) & 0x3f];
        result += map[(bits << 4) & 0x3f];
        result += map[64];
        result += map[64];
    }
    return result;
}
function isBinary(obj) {
    const buf = new Buffer();
    try {
        if (0 > buf.readFromSync(obj))
            return true;
        return false;
    }
    catch {
        return false;
    }
    finally {
        buf.reset();
    }
}
export const binary = new Type("tag:yaml.org,2002:binary", {
    construct: constructYamlBinary,
    kind: "scalar",
    predicate: isBinary,
    represent: representYamlBinary,
    resolve: resolveYamlBinary,
});
