// Original 5×7 bitmap glyphs. All rendering is local; no fonts or API are fetched.
const patterns = {
    A: '01110/10001/10001/11111/10001/10001/10001',
    B: '11110/10001/10001/11110/10001/10001/11110',
    C: '01111/10000/10000/10000/10000/10000/01111',
    D: '11110/10001/10001/10001/10001/10001/11110',
    E: '11111/10000/10000/11110/10000/10000/11111',
    F: '11111/10000/10000/11110/10000/10000/10000',
    G: '01111/10000/10000/10111/10001/10001/01111',
    H: '10001/10001/10001/11111/10001/10001/10001',
    I: '11111/00100/00100/00100/00100/00100/11111',
    J: '00111/00010/00010/00010/10010/10010/01100',
    K: '10001/10010/10100/11000/10100/10010/10001',
    L: '10000/10000/10000/10000/10000/10000/11111',
    M: '10001/11011/10101/10101/10001/10001/10001',
    N: '10001/11001/10101/10011/10001/10001/10001',
    O: '01110/10001/10001/10001/10001/10001/01110',
    P: '11110/10001/10001/11110/10000/10000/10000',
    Q: '01110/10001/10001/10001/10101/10010/01101',
    R: '11110/10001/10001/11110/10100/10010/10001',
    S: '01111/10000/10000/01110/00001/00001/11110',
    T: '11111/00100/00100/00100/00100/00100/00100',
    U: '10001/10001/10001/10001/10001/10001/01110',
    V: '10001/10001/10001/10001/10001/01010/00100',
    W: '10001/10001/10001/10101/10101/10101/01010',
    X: '10001/10001/01010/00100/01010/10001/10001',
    Y: '10001/10001/01010/00100/00100/00100/00100',
    Z: '11111/00001/00010/00100/01000/10000/11111',
    0: '01110/10001/10011/10101/11001/10001/01110',
    1: '00100/01100/00100/00100/00100/00100/01110',
    2: '01110/10001/00001/00010/00100/01000/11111',
    3: '11110/00001/00001/01110/00001/00001/11110',
    4: '00010/00110/01010/10010/11111/00010/00010',
    5: '11111/10000/10000/11110/00001/00001/11110',
    6: '01110/10000/10000/11110/10001/10001/01110',
    7: '11111/00001/00010/00100/01000/01000/01000',
    8: '01110/10001/10001/01110/10001/10001/01110',
    9: '01110/10001/10001/01111/00001/00001/01110',
    ' ': '000/000/000/000/000/000/000',
    '!': '1/1/1/1/1/0/1',
    '?': '01110/10001/00001/00010/00100/00000/00100',
    '.': '0/0/0/0/0/0/1',
    ',': '00/00/00/00/00/01/10',
    ':': '0/1/0/0/1/0/0',
    ';': '00/01/00/00/01/01/10',
    '-': '000/000/000/111/000/000/000',
    '_': '00000/00000/00000/00000/00000/00000/11111',
    '+': '00000/00100/00100/11111/00100/00100/00000',
    '=': '00000/00000/11111/00000/11111/00000/00000',
    '/': '00001/00001/00010/00100/01000/10000/10000',
    '\\': '10000/10000/01000/00100/00010/00001/00001',
    '(': '001/010/100/100/100/010/001',
    ')': '100/010/001/001/001/010/100',
    '[': '111/100/100/100/100/100/111',
    ']': '111/001/001/001/001/001/111',
    '{': '001/010/010/100/010/010/001',
    '}': '100/010/010/001/010/010/100',
    '<': '0001/0010/0100/1000/0100/0010/0001',
    '>': '1000/0100/0010/0001/0010/0100/1000',
    "'": '1/1/0/0/0/0/0',
    '"': '101/101/000/000/000/000/000',
    '`': '10/01/00/00/00/00/00',
    '#': '01010/11111/01010/01010/11111/01010/00000',
    '$': '00100/01111/10100/01110/00101/11110/00100',
    '%': '11001/11010/00010/00100/01000/01011/10011',
    '&': '01100/10010/10100/01000/10101/10010/01101',
    '*': '00000/10101/01110/11111/01110/10101/00000',
    '@': '01110/10001/10111/10101/10111/10000/01111',
    '^': '00100/01010/10001/00000/00000/00000/00000',
    '|': '1/1/1/1/1/1/1',
    '~': '00000/00000/01001/10110/00000/00000/00000',
};

export const styles = ['block', 'banner', 'slant', 'compact'];

export function normalizeText(text) {
    return text.replace(/ı/g, 'i').normalize('NFD').replace(/[\u0300-\u036f]/g, '').toUpperCase();
}

export function render(text, style = 'block') {
    if (!styles.includes(style)) throw new Error('Unknown lettering style');
    if (text.length > 500) throw new Error('Text is too long');
    return normalizeText(text).replace(/\r\n?/g, '\n').split('\n').map(line => {
        const characters = [...line.replace(/\t/g, '    ')];
        const glyphs = characters.map(char => (patterns[char] || patterns['?']).split('/'));
        return Array.from({length: 7}, (_, row) => {
            const pixels = glyphs.map((glyph, i) => [...glyph[row]].map(pixel => {
                if (style === 'banner') return pixel === '1' ? characters[i] : ' ';
                if (style === 'compact') return pixel === '1' ? '#' : ' ';
                return pixel === '1' ? '##' : '  ';
            }).join('')).join(style === 'compact' || style === 'banner' ? ' ' : '  ');
            return (style === 'slant' ? ' '.repeat(6 - row) : '') + pixels.trimEnd();
        }).join('\n');
    }).join('\n\n');
}