function adfNodeToText(node) {
    if (!node) {
        return '';
    }

    if (Array.isArray(node)) {
        return node.map(adfNodeToText).join('');
    }

    if (typeof node === 'string') {
        return node;
    }

    switch (node.type) {
        case 'text':
            return node.text || '';
        case 'hardBreak':
            return '\n';
        case 'paragraph':
        case 'heading':
            return `${(node.content || []).map(adfNodeToText).join('')}\n`;
        case 'bulletList':
        case 'orderedList':
            return (node.content || [])
                .map(item => adfNodeToText(item))
                .join('');
        case 'listItem':
            return `• ${(node.content || []).map(adfNodeToText).join('').trim()}\n`;
        case 'rule':
            return '\n';
        case 'codeBlock':
            return `${(node.content || []).map(adfNodeToText).join('')}\n`;
        case 'inlineCard':
        case 'blockCard':
            return node.attrs?.url || '';
        default:
            if (node.content) {
                return node.content.map(adfNodeToText).join('');
            }
            return '';
    }
}

export function adfToPlainText(value) {
    if (!value || typeof value !== 'object') {
        return '';
    }
    if (value.type !== 'doc' || !Array.isArray(value.content)) {
        return '';
    }
    return value.content.map(adfNodeToText).join('').trim();
}

export function formatJiraWikiMarkup(text) {
    if (text == null || text === '') {
        return '';
    }

    let output = String(text).replace(/\r\n/g, '\n');

    output = output.replace(/\{noformat\}([\s\S]*?)\{noformat\}/gi, (_, body) => `\n${body.trim()}\n`);
    output = output.replace(/\{code(?::[^}]*)?\}([\s\S]*?)\{code\}/gi, (_, body) => `\n${body.trim()}\n`);
    output = output.replace(/\{color(?::[^}]*)?\}([\s\S]*?)\{color\}/gi, '$1');
    output = output.replace(/\{quote\}([\s\S]*?)\{quote\}/gi, '$1');
    output = output.replace(/![^!\n]+!/g, '');
    output = output.replace(/\[~accountid:[^\]]+\]/gi, '');
    output = output.replace(/\[([^\]|]+)\|([^\]]+?)(?:\|smart-link)?\]/gi, (_, label, url) => {
        const cleanLabel = label.trim();
        const cleanUrl = url.trim();
        if (!cleanLabel || cleanLabel === cleanUrl) {
            return cleanUrl;
        }
        return `${cleanLabel} (${cleanUrl})`;
    });
    output = output.replace(/\*\*([^*\n]+?)\*\*/g, '$1');
    output = output.replace(/(?<!\*)\*([^*\n]+)\*(?!\*)/g, '$1');
    output = output.replace(/^h([1-6])\.\s*(.+)$/gim, (_, __, title) => `${title.trim()}\n`);
    output = output.replace(/^#{1,6}\s+(.+)$/gm, '$1\n');
    output = output.replace(/^\s*[-*#]\s+/gm, '• ');
    output = output.replace(/^-{4,}\s*$/gm, '\n');
    output = output.replace(/[ \t]+\n/g, '\n');
    output = output.replace(/\n{3,}/g, '\n\n');

    return output.trim();
}

export function formatJiraRichText(value) {
    if (value == null || value === '') {
        return '';
    }

    if (typeof value === 'object') {
        const adfText = adfToPlainText(value);
        if (adfText) {
            return formatJiraWikiMarkup(adfText);
        }
        return value.displayName || value.value || value.name || '';
    }

    return formatJiraWikiMarkup(value);
}