import {
    Document,
    Paragraph,
    TextRun,
    CommentRangeStart,
    CommentRangeEnd,
    CommentReference,
    LevelFormat,
    LevelSuffix,
    AlignmentType,
    Packer
} from 'docx';
import JSZip from 'jszip';
import fs from 'fs';

function htmlToPlainText(html) {
    return String(html || '')
        .replace(/ /g, ' ')
        .replace(/<br\s*\/?>/gi, ' ')
        .replace(/<[^>]*>/g, '')
        .replace(/\s+/g, ' ')
        .trim();
}

function parseSingleAuthorName(nameStr) {
    const token = String(nameStr || '').trim();
    if (!token || /^et al\.?$/i.test(token)) return null;
    const parts = token.split(/\s+/).filter(Boolean);
    if (!parts.length) return null;
    if (parts.length === 1) return { first: '', last: parts[0] };
    return { first: parts.slice(0, -1).join(' '), last: parts[parts.length - 1] };
}

function firstNameToAmaInitials(first) {
    return String(first || '')
        .split(/[\s-]+/)
        .filter(Boolean)
        .map((part) => part.charAt(0).toUpperCase())
        .join('');
}

function formatOneAmaAuthor(nameStr) {
    const parsed = parseSingleAuthorName(nameStr);
    if (!parsed || !parsed.last) return '';
    const initials = firstNameToAmaInitials(parsed.first);
    return initials ? parsed.last + ' ' + initials : parsed.last;
}

function splitAuthorList(authorText) {
    return String(authorText || '')
        .split(/\s*,\s*/)
        .map((part) => part.trim())
        .filter(Boolean);
}

function isAmaAbbreviatedAuthorList(authorText) {
    const authors = splitAuthorList(htmlToPlainText(authorText));
    if (!authors.length) return true;
    return authors.every((token) => {
        if (/^et al\.?$/i.test(token)) return true;
        return /^[\p{L}][\p{L}\-'']*\s+[A-Z](?:-?[A-Z])*\.?$/u.test(token);
    });
}

function needsAmaAuthorAbbreviation(authorText) {
    const plain = htmlToPlainText(authorText).trim();
    if (!plain || isAmaAbbreviatedAuthorList(plain)) return false;
    return splitAuthorList(plain).some((token) => {
        const parts = token.split(/\s+/).filter(Boolean);
        if (parts.length < 2) return false;
        return parts[0].length > 2;
    });
}

function buildAmaAuthorAbbreviation(authorText) {
    const authors = splitAuthorList(htmlToPlainText(authorText));
    return authors
        .map((token) => (/^et al\.?$/i.test(token) ? 'et al' : formatOneAmaAuthor(token)))
        .filter(Boolean)
        .join(', ');
}

function buildBookAmaAuthorComment(ref) {
    if (!ref || ref.refer_type !== 'book') return '';
    const authorSource = ref.author ? htmlToPlainText(ref.author) : '';
    if (!authorSource || !needsAmaAuthorAbbreviation(authorSource)) return '';
    const amaAuthors = buildAmaAuthorAbbreviation(authorSource);
    return amaAuthors ? 'AMA格式作者缩写：' + amaAuthors : '';
}

const ref = {
    refer_type: 'book',
    author: 'Jacqueline Fawcett, Susan DeSanto-Madeya',
    title: 'Contemporary Nursing Knowledge',
    dateno: '(3rd Edition). Philadelphia, PA: F. A. Davis Company; 2013.',
    isbn: '978-0-8036-2765-9'
};

const commentText = buildBookAmaAuthorComment(ref);
console.log('comment text:', commentText);

const commentId = 0;
const doc = new Document({
    numbering: {
        config: [{
            reference: 'ref-num',
            levels: [{
                level: 0,
                format: LevelFormat.DECIMAL,
                text: '%1.',
                alignment: AlignmentType.START,
                suffix: LevelSuffix.TAB,
                style: { paragraph: { indent: { left: 720, hanging: 360 } } }
            }]
        }]
    },
    comments: {
        children: [{
            id: commentId,
            author: 'Editor',
            initials: 'Ed',
            date: new Date(),
            children: [new Paragraph({ children: [new TextRun(commentText)] })]
        }]
    },
    sections: [{
        children: [new Paragraph({
            numbering: { reference: 'ref-num', level: 0 },
            children: [
                new CommentRangeStart(commentId),
                new TextRun('Jacqueline Fawcett, Susan DeSanto-Madeya. Contemporary Nursing Knowledge.'),
                new CommentRangeEnd(commentId),
                new TextRun({ children: [new CommentReference(commentId)] })
            ]
        })]
    }]
});

const buf = await Packer.toBuffer(doc);
fs.writeFileSync('test-ref-comment-standalone.docx', buf);

const zip = await JSZip.loadAsync(buf);
const docXml = await zip.file('word/document.xml').async('string');
const commentsXml = zip.file('word/comments.xml');
const relsXml = zip.file('word/_rels/document.xml.rels');
const contentTypes = zip.file('[Content_Types].xml');

console.log('has comments.xml:', !!commentsXml);
console.log('has commentReference in document:', docXml.includes('commentReference'));
console.log('has comments rel in document.xml.rels:', relsXml ? (await relsXml.async('string')).includes('comments') : false);
console.log('has comments in Content_Types:', contentTypes ? (await contentTypes.async('string')).includes('comments') : false);
if (commentsXml) {
    console.log('comments preview:', (await commentsXml.async('string')).slice(0, 800));
}