class PostsController < ApplicationController
  def show
    @post = Post.find(params[:id])
  end

  def new
    # Hannah remove please, add in next line: @topic = Topic.find(params[:id])
    @topic = Topic.find(params[:topic_id])
    @post = Post.new
  end

  def create
    #create a new instance of post
    @post = Post.new
    @post.title = params[:post][:title]
    @post.body = params[:post][:body]
    # Hannah remove please. Add in next 2 lines: @topic = Topic.find(params[:id])
    # @post.topic = topic
    topic = Topic.find(params[:topic_id])
    @post.topic = topic

    #if post is successfully saved, display success message
    if @post.save
      flash[:notice] = "Post was saved."
      # remove @topic and make it topic
      redirect_to [topic, @post]
    else
      #if save is unsuccessful, display error message and render the new view again
      flash.now[:alert] = "There was an error saving the post. Please try again."
      render :new
    end
  end

  def edit
    @post = Post.find(params[:id])
  end

  def update
    @post = Post.find(params[:id])
    @post.title = params[:post][:title]
    @post.body = params[:post][:body]

    if @post.save
      flash[:notice] = "Post was updated"
      # Hannah remove please and add in next line: redirect_to [@topic, @post]
      redirect_to [@post.topic, @post]
    else
      flash.now[:alert] = "There was an error updating. Please try again."
      render :edit
    end
  end

  def destroy
    @post = Post.find(params[:id])
    if @post.destroy
      flash[:notice] = "\"#{@post.title}\" was deleted successfully."
      redirect_to @post.topic
    else
      flash.now[:alert] = "There was a problem deleting the post."
      render :show
    end
  end