import { NextRequest, NextResponse } from 'next/server';
import { prisma } from '@/lib/db';

export async function POST(
  request: NextRequest,
  { params }: { params: Promise<{ slug: string }> }
) {
  const { slug } = await params;

  const body = await request.json();
  const { newContent, reason } = body;

  if (!newContent || typeof newContent !== 'string') {
    return NextResponse.json({ error: 'Missing newContent' }, { status: 400 });
  }

  if (!reason || typeof reason !== 'string') {
    return NextResponse.json({ error: 'Missing reason' }, { status: 400 });
  }

  // Fetch current article
  const article = await prisma.article.findUnique({
    where: { slug },
  });

  if (!article) {
    return NextResponse.json({ error: 'Article not found' }, { status: 404 });
  }

  // Transaction: create history entry and update article
  const result = await prisma.$transaction(async (tx) => {
    // Create history entry
    const historyEntry = await tx.articleHistory.create({
      data: {
        articleId: article.id,
        oldContent: article.content,
        newContent: newContent,
        reason: reason,
      },
    });

    // Update article content
    await tx.article.update({
      where: { id: article.id },
      data: {
        content: newContent,
        updatedAt: new Date(),
      },
    });

    return historyEntry;
  });

  return NextResponse.json({
    success: true,
    historyId: result.id,
  });
}