import Blog from "../models/blog.model.js";

// Add comment to a blog
export const addComment = async (req, res) => {
  try {
    const { blogId } = req.params;
    const { text, name } = req.body;

    const blog = await Blog.findById(blogId);
    if (!blog) return res.status(404).json({ message: "Blog not found" });

    blog.comments.push({
      user: req.user?._id || null,
      name: name || "Anonymous",
      text
    });

    await blog.save();
    res.status(201).json(blog.comments);
  } catch (err) {
    res.status(500).json({ message: err.message });
  }
};

// Get all comments for a blog
export const getComments = async (req, res) => {
  try {
    const { blogId } = req.params;

    const blog = await Blog.findById(blogId);
    if (!blog) return res.status(404).json({ message: "Blog not found" });

    res.json(blog.comments.sort((a,b) => b.createdAt - a.createdAt));
  } catch (err) {
    res.status(500).json({ message: err.message });
  }
};

// Delete a comment (Admin only)
export const deleteComment = async (req, res) => {
  try {
    const { blogId, commentId } = req.params;

    const blog = await Blog.findById(blogId);
    if (!blog) return res.status(404).json({ message: "Blog not found" });

    blog.comments.id(commentId)?.remove();
    await blog.save();

    res.json({ message: "Comment deleted" });
  } catch (err) {
    res.status(500).json({ message: err.message });
  }
};
