class ReservationsController < ApplicationController
  before_action :set_company
  before_action :set_reservation, only: %i[show edit update destroy]

  layout :determine_layout
  # GET /reservations or /reservations.json
  def index
    @reservations = Reservation.includes(:team, :customer).where(company: @company)
    @reservations = ActiveModelSerializers::SerializableResource.new(
      @reservations, 
      each_serializer: ReservationSerializer
    ).as_json
  end

  # GET /reservations/1 or /reservations/1.json
  def show; end

  # GET /reservations/new
  def new
    # logger.debug "--- Reservations#new --- Params received: #{params.inspect}"

    # Use Time.zone.parse to interpret times within the application's configured timezone
    start_time_param = params[:start_time]
    end_time_param = params[:end_time]
    # logger.debug "--- Reservations#new --- Start Param: #{start_time_param}, End Param: #{end_time_param}"

    start_time = start_time_param ? Time.zone.parse(start_time_param) : Time.current
    end_time = end_time_param ? Time.zone.parse(end_time_param) : Time.current + 30.minutes
    # logger.debug "--- Reservations#new --- Parsed Start: #{start_time}, Parsed End: #{end_time}"

    @reservation = Reservation.new(start_time: start_time, end_time: end_time)
    # logger.debug "--- Reservations#new --- Reservation object initialized: #{@reservation.attributes.inspect}"

    @reservation.team = @company.teams.first # Assign default team
    @customers = @company.customers # Preload customers for potential dropdown
  end

  # GET /reservations/1/edit
  def edit; end

  # POST /reservations or /reservations.json
  def create
    @reservation = @company.reservations.new(
      reservation_params.except(
        :customer_id, :customer_first_name, :customer_surname,
        :customer_original_phone, :customer_birth_year, :customer_composite_key
      )
    )

    # Find or create customer based on submitted attributes
    find_or_create_customer
    # Associate the reservation with the found/created customer's primary key attributes
    assign_customer_to_reservation

    if @reservation.save
      redirect_to reservations_url, notice: t('.reservation_created')
    else
      @customers = @company.customers
      render :new, status: :unprocessable_entity
    end
  rescue ActiveRecord::RecordInvalid => e
    # If customer creation/validation fails
    @reservation.errors.add(:base, "Failed to save customer: #{e.message}")
    @customers = @company.customers
    render :new, status: :unprocessable_entity
  end

  # PATCH/PUT /reservations/1 or /reservations/1.json
  def update
    # Separate reservation attributes from customer attributes
    customer_attrs = build_customer_attributes # Use existing helper
    reservation_attrs = reservation_params.except(
      :customer_id, :customer_first_name, :customer_surname,
      :customer_original_phone, :customer_birth_year, :customer_composite_key
    )

    # Find the customer identified by the submitted name/phone
    @customer = Customer.find_by(
      first_name: customer_attrs[:first_name],
      surname: customer_attrs[:surname],
      original_phone: customer_attrs[:original_phone],
      company_id: @company.id
    )

    # Update customer phone/birthyear if found (identifiers assumed immutable here)
    customer_updated = @customer ? @customer.update(customer_attrs.slice(:phone, :birthyear)) : false

    # Assign the correct customer foreign keys to the reservation attributes
    if @customer
      reservation_attrs[:customer_first_name] = @customer.first_name
      reservation_attrs[:customer_surname] = @customer.surname
      reservation_attrs[:customer_original_phone] = @customer.original_phone
    else
      # Fall back to original keys if form customer wasn't found (e.g., identifiers changed)
      # Consider adding an error or different handling if customer *must* be found.
      reservation_attrs[:customer_first_name] = @reservation.customer_first_name
      reservation_attrs[:customer_surname] = @reservation.customer_surname
      reservation_attrs[:customer_original_phone] = @reservation.customer_original_phone
    end

    reservation_updated = @reservation.update(reservation_attrs)

    respond_to do |format|
      # Check if reservation update was successful
      # (We might ignore customer_updated status for now, or add more complex checks)
      if reservation_updated
        format.html { redirect_to reservations_url, notice: t('.reservation_updated') }
        format.json { render :show, status: :ok, location: @reservation }
      else
        @customers = @company.customers # Reload for form
        format.html { render :edit, status: :unprocessable_entity }
        format.json { render json: @reservation.errors, status: :unprocessable_entity }
      end
    end
  rescue ActiveRecord::RecordInvalid => e # Catch potential customer update errors
    @reservation.errors.add(:base, "Failed to save customer: #{e.message}") if @customer&.invalid?
    @customers = @company.customers
    render :edit, status: :unprocessable_entity
  end

  # DELETE /reservations/1 or /reservations/1.json
  def destroy
    @reservation.destroy!

    respond_to do |format|
      format.html { redirect_to reservations_url, notice: t('.reservation_destroyed') }
      format.json { head :no_content }
    end
  end

  private

  # Use callbacks to share common setup or constraints between actions.
  def set_reservation
    @reservation = Reservation.find(params[:id])
  end

  # Only allow a list of trusted parameters through.
  def reservation_params
    # Permit composite key if form uses it, otherwise permit individual fields
    # params.require(:reservation).permit(:customer_composite_key, ...)
    params.require(:reservation).permit(
      :team_id,
      :start_time,
      :end_time,
      :customer_first_name,
      :customer_surname,
      :customer_original_phone,
      :customer_birth_year,
      :customer_composite_key,
      :customer_id # Allow this if select still sends it sometimes
    )
  end

  def determine_layout
    action_name == 'index' ? 'calendar' : 'application'
  end

  # Finds or creates customer based on submitted fields
  def find_or_create_customer
    customer_params = build_customer_attributes

    @customer = if new_customer?
                  Customer.create!(customer_params)
                else
                  find_or_initialize_customer(customer_params)
                end
  end

  # Extracts customer attributes from reservation form parameters
  def build_customer_attributes
    {
      first_name: params[:reservation][:customer_first_name],
      surname: params[:reservation][:customer_surname],
      original_phone: params[:reservation][:customer_original_phone],
      phone: params[:reservation][:customer_original_phone], # Assuming phone is same as original_phone for now
      birthyear: params[:reservation][:customer_birth_year],
      company_id: @company.id
    }
  end

  # Checks if the submitted customer ID indicates a new customer
  def new_customer?
    # Check based on the specific value format used by TomSelect create function
    params[:reservation][:customer_composite_key]&.end_with?('__new') ||
      params[:reservation][:customer_id]&.end_with?('__new') # Fallback if old key is used
  end

  # Finds customer by composite key or creates them
  def find_or_initialize_customer(attributes)
    # Find using the composite key fields
    Customer.find_or_create_by!(
      first_name: attributes[:first_name],
      surname: attributes[:surname],
      original_phone: attributes[:original_phone]
      # company_id: attributes[:company_id] # Scope to company if needed
    ) do |customer|
      # Assign other attributes only if creating
      customer.assign_attributes(attributes.slice(:phone, :birthyear, :company_id))
    end
  end

  # Sets the foreign key fields on the reservation based on the found/created customer
  def assign_customer_to_reservation
    return unless @customer # Guard clause

    @reservation.customer_first_name = @customer.first_name
    @reservation.customer_surname = @customer.surname
    @reservation.customer_original_phone = @customer.original_phone
  end

  # Override the application controller method to include teams
  def set_company
    company_id = session[:company_id]
    
    unless company_id && Company.exists?(company_id)
      company_id = Company.first&.id
      session[:company_id] = company_id
    end
    
    @company = Company.includes(:teams).find(company_id) if company_id
    
    unless @company
      redirect_to companies_path, alert: 'No company found. Please create a company first.'
      return
    end
  end
end