# Events controller - Public event listings and individual event display
#
# This controller manages public event browsing and displays individual events
# with their associated ticket types. No authentication required for public browsing.
class EventsController < ApplicationController
  # No authentication required for public event viewing
  before_action :authenticate_user!, only: []
  before_action :set_event, only: [ :show ]

  # Display paginated list of upcoming published events
  #
  # Shows events in published state, ordered by start time ascending
  # Includes event owner information and supports Kaminari pagination
  def index
    @events = Event.includes(:user).upcoming.page(params[:page]).per(12)
  end

  # Display individual event with ticket type information
  #
  # Shows complete event details including venue information,
  # available ticket types, and allows users to add tickets to cart
  def show
    # Event is set by set_event callback with ticket types preloaded
    # Template will display event details and ticket selection interface
  end

  private

  # Find and set the current event with eager-loaded associations
  # Supports both old slug-only format and new SEO-friendly year/month/slug format
  # Loads event with ticket types to avoid N+1 queries
  def set_event
    if params[:year] && params[:month]
      # New SEO-friendly format: /events/2024/07/summer-party
      year = params[:year].to_i
      month = params[:month].to_i
      start_of_month = Date.new(year, month, 1).beginning_of_month
      end_of_month = start_of_month.end_of_month
      
      @event = Event.includes(:ticket_types)
                   .where(slug: params[:slug])
                   .where(start_time: start_of_month..end_of_month)
                   .first!
    else
      # Legacy format: /events/summer-party (for backward compatibility)
      @event = Event.includes(:ticket_types).find_by!(slug: params[:slug])
    end
  rescue ActiveRecord::RecordNotFound
    redirect_to events_path, alert: "Événement non trouvé"
  end

  # Generate SEO-friendly path for an event
  def seo_event_path(event)
    year = event.start_time.year
    month = format("%02d", event.start_time.month)
    event_path(year: year, month: month, slug: event.slug)
  end
  helper_method :seo_event_path
end