/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
/**
 * Calculates the maximum width of a multi-line ASCII art string.
 * @param asciiArt The ASCII art string.
 * @returns The length of the longest line in the ASCII art.
 */
export const getAsciiArtWidth = (asciiArt) => {
    if (!asciiArt) {
        return 0;
    }
    const lines = asciiArt.split('\n');
    return Math.max(...lines.map((line) => line.length));
};
/**
 * Checks if a Buffer is likely binary by testing for the presence of a NULL byte.
 * The presence of a NULL byte is a strong indicator that the data is not plain text.
 * @param data The Buffer to check.
 * @param sampleSize The number of bytes from the start of the buffer to test.
 * @returns True if a NULL byte is found, false otherwise.
 */
export function isBinary(data, sampleSize = 512) {
    if (!data) {
        return false;
    }
    const sample = data.length > sampleSize ? data.subarray(0, sampleSize) : data;
    for (const byte of sample) {
        // The presence of a NULL byte (0x00) is one of the most reliable
        // indicators of a binary file. Text files should not contain them.
        if (byte === 0) {
            return true;
        }
    }
    // If no NULL bytes were found in the sample, we assume it's text.
    return false;
}
/*
 * -------------------------------------------------------------------------
 *  Unicode‑aware helpers (work at the code‑point level rather than UTF‑16
 *  code units so that surrogate‑pair emoji count as one "column".)
 * ---------------------------------------------------------------------- */
export function toCodePoints(str) {
    // [...str] or Array.from both iterate by UTF‑32 code point, handling
    // surrogate pairs correctly.
    return Array.from(str);
}
export function cpLen(str) {
    return toCodePoints(str).length;
}
export function cpSlice(str, start, end) {
    // Slice by code‑point indices and re‑join.
    const arr = toCodePoints(str).slice(start, end);
    return arr.join('');
}
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