# Tickets controller - handles ticket viewing and downloads with SEO-friendly URLs
#
# This controller manages individual ticket display and downloads
# Uses event-slug-ticket-id format for SEO-friendly URLs
class TicketsController < ApplicationController
  before_action :authenticate_user!
  before_action :set_ticket_from_seo_params, only: [:show, :view, :download, :retry_payment]

  # Display ticket details
  def show
    @event = @ticket.event
  end

  # Display ticket in PDF-like format
  def view
    @event = @ticket.event
  end

  # Download PDF ticket - only accessible by ticket owner
  # User must be authenticated to download ticket
  def download
    # Generate PDF using Grover
    begin
      Rails.logger.info "Starting PDF generation for ticket ID: #{@ticket.id}"

      # Render the HTML template
      html = render_to_string(
        partial: "tickets/pdf_ticket",
        layout: false,
        locals: { ticket: @ticket }
      )

      Rails.logger.info "HTML template rendered successfully, length: #{html.length}"

      # Configure Grover options for PDF generation
      pdf_options = {
        format: 'A4',
        margin: {
          top: '0.5in',
          bottom: '0.5in',
          left: '0.5in',
          right: '0.5in'
        },
        print_background: true,
        display_header_footer: false,
        prefer_css_page_size: true,
        launch_args: ["--no-sandbox", "--disable-setuid-sandbox"] # For better compatibility
      }

      # Generate PDF
      pdf = Grover.new(html, pdf_options).to_pdf
      
      Rails.logger.info "PDF generation completed for ticket ID: #{@ticket.id}"

      # Send PDF as download with SEO-friendly filename
      send_data pdf,
                filename: "billet-#{@ticket.event.slug}-#{@ticket.id}.pdf",
                type: 'application/pdf',
                disposition: 'attachment'
    rescue => e
      Rails.logger.error "PDF generation failed for ticket ID: #{@ticket.id} - Error: #{e.message}"
      Rails.logger.error e.backtrace.join("\n")
      
      redirect_to view_ticket_path(event_slug: @ticket.event.slug, ticket_id: @ticket.id), 
                 alert: "Erreur lors de la génération du PDF. Veuillez réessayer."
    end
  end

  # Redirect retry payment to order system
  def retry_payment
    # Look for draft order for this ticket's event
    order = current_user.orders.find_by(event: @ticket.event, status: "draft")

    if order&.can_retry_payment?
      year = order.event.start_time.year
      month = format("%02d", order.event.start_time.month)
      redirect_to event_checkout_path(year: year, month: month, slug: order.event.slug)
    else
      redirect_to seo_event_path(@ticket.event),
                 alert: "Aucune commande disponible pour un nouveau paiement"
    end
  end

  # Legacy redirects for backward compatibility
  def payment_success
    redirect_to booking_payment_success_path(session_id: params[:session_id])
  end

  def payment_cancel
    redirect_to booking_payment_cancelled_path
  end

  private

  def set_ticket_from_seo_params
    # Parse event_slug and ticket_id from the SEO-friendly format: event-slug-123
    slug_and_id = params[:event_slug_ticket_id] || "#{params[:event_slug]}-#{params[:ticket_id]}"
    
    # Split by last dash to separate event slug from ticket ID
    parts = slug_and_id.split('-')
    ticket_id = parts.pop
    event_slug = parts.join('-')

    # Find ticket and ensure it belongs to current user
    @ticket = Ticket.joins(order: :user)
                   .includes(:event, :ticket_type, order: :user)
                   .joins(:event)
                   .where(
                     tickets: { id: ticket_id },
                     orders: { user_id: current_user.id },
                     events: { slug: event_slug }
                   )
                   .first

    unless @ticket
      redirect_to dashboard_path, alert: "Billet non trouvé ou vous n'avez pas l'autorisation d'accéder à ce billet"
    end
  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