class FuelEntriesController < ApplicationController
  def create
    @vehicle = Vehicle.find(params[:vehicle_id])
    @fuel_entry = @vehicle.fuel_entries.build(fuel_entry_params)
    @fuel_entry.updated_by_user = Current.user

    if save_fuel_entry
      redirect_to @vehicle, notice: "Fuel entry recorded."
    else
      prepare_vehicle_show
      render "vehicles/show", status: :unprocessable_entity
    end
  end

  private

  def fuel_entry_params
    params.require(:fuel_entry).permit(:odometer, :gallons_pumped, :price_paid, :date)
  end

  def save_fuel_entry
    saved = false

    FuelEntry.transaction do
      if @fuel_entry.save
        update_vehicle_odometer(@fuel_entry.odometer)
        saved = true
      end
    end

    saved
  end

  def update_vehicle_odometer(odometer)
    return unless odometer > @vehicle.current_odometer

    @vehicle.update!(current_odometer: odometer)
  end

  def prepare_vehicle_show
    @maintenance_schedules = @vehicle.maintenance_schedules.active.order(:maintenance_type)
    @maintenance_schedule_statuses = maintenance_schedule_statuses(@maintenance_schedules)
    @fuel_entries = @vehicle.fuel_entries.includes(:updated_by_user).order(date: :desc, created_at: :desc)
    @maintenance_entries = @vehicle.maintenance_entries.includes(:updated_by_user).order(date: :desc, created_at: :desc)
    @maintenance_entry = @vehicle.maintenance_entries.build(date: Date.current)
  end

  def maintenance_schedule_statuses(schedules)
    schedules.index_with do |schedule|
      latest_entry = @vehicle.maintenance_entries
        .where("lower(name) = ?", schedule.maintenance_type.downcase)
        .order(date: :desc, created_at: :desc)
        .first
      MaintenanceScheduleStatus.new(schedule, latest_entry, current_odometer: @vehicle.current_odometer)
    end
  end
end