import { clsx, type ClassValue } from "clsx";
import { twMerge } from "tailwind-merge";

export function cn(...inputs: ClassValue[]) {
    return twMerge(clsx(inputs));
}

export function cleanMessageContent(content: string): string {
    if (!content) return "";

    // Remove "Assumptions & Risks" section and everything until the next header or end
    let cleaned = content.replace(/### ⚠️ Assumptions & Risks[\s\S]*?(?=### |$)/g, "");

    // Remove "Unknowns / Limitations" section and everything until the next header or end
    cleaned = cleaned.replace(/### ❌ Unknowns \/ Limitations[\s\S]*?(?=### |$)/g, "");

    return cleaned.trim();
}

export function linkifySources(content: string, sources: any[] = []): string {
    if (!content || !sources.length) return content;

    let linkedContent = content;

    sources.forEach((source, index) => {
        const sourceNum = index + 1;
        const url = source.url || "#";
        // Regex to find "Source X" or "(Source X)" case insensitive
        // We use a complex regex to avoid double linking if run multiple times or overlapping
        // Simplified: Look for "Source X" that isn't already inside a markdown link
        const regex = new RegExp(`(?<!\\[)Source ${sourceNum}(?!\\])`, 'gi');

        linkedContent = linkedContent.replace(regex, `[Source ${sourceNum}](${url})`);
    });

    return linkedContent;
}