class MoviesController < ApplicationController

  def movie_params
    params.require(:movie).permit(:title, :rating, :description, :release_date)
  end

  def show
    id = params[:id] # retrieve movie ID from URI route
    @movie = Movie.find(id) # look up movie by unique ID
    # will render app/views/movies/show.<extension> by default
  end
  def index
    sort = params[:sort] || session[:sort]
    if sort == :title or sort == :release_date
       session[:sort] = sort || {}
    end
    @title_header = 'hilite' if sort == "title"
    @release_date_header = 'hilite' if sort == "release_date"

    all_ratings = Movie.all.select(:rating).group(:rating).order(:rating)
    @all_ratings =  all_ratings.map {|d| d.rating}
    if params[:ratings] != nil
      session[:ratings] = params[:ratings].map {|i, v| i}
      @ratings_array = session[:ratings]
    else
      if params[:sort] == nil && params[:controller] == :movies
        @ratings_array = @all_ratings
        session[:ratings] = @ratings_array || @all_ratings
      else
        @ratings_array = session[:ratings] || @all_ratings || {}
      end
    end

    if params[:sort] != session[:sort] or params[:ratings] != session[:ratings]
      session[:sort] = sort
      session[:ratings] = @ratings_array
      if @ratings_array == {}
        redirect_to :sort => sort, :ratings => @all_ratings and return
      else
        redirect_to :sort => sort, :ratings => @ratings_array and return
      end
    end
    @movies = Movie.all.where(rating: @ratings_array)
    @movies = @movies.order(sort)
  end

  def new
    # default: render 'new' template
  end

  def create
    @movie = Movie.create!(movie_params)
    flash[:notice] = "#{@movie.title} was successfully created."
    redirect_to movies_path
  end

  def edit
    @movie = Movie.find params[:id]
  end

  def update
    @movie = Movie.find params[:id]
    @movie.update_attributes!(movie_params)
    flash[:notice] = "#{@movie.title} was successfully updated."
    redirect_to movie_path(@movie)
  end

  def destroy
    @movie = Movie.find(params[:id])
    @movie.destroy
    flash[:notice] = "Movie '#{@movie.title}' deleted."
    redirect_to movies_path
  end

end