class VehiclesController < ApplicationController
  before_action :set_vehicle, only: %i[show edit update destroy]

  def index
    @status = params[:status]
    @vehicles = vehicles_for_status(@status).order(:make, :model, :year)
  end

  def show
    prepare_show
  end

  def new
    @vehicle = Vehicle.new
  end

  def create
    @vehicle = Vehicle.new(vehicle_params)

    if @vehicle.save
      redirect_to @vehicle, notice: "Vehicle created."
    else
      render :new, status: :unprocessable_entity
    end
  end

  def edit
  end

  def update
    if @vehicle.update(vehicle_params)
      redirect_to @vehicle, notice: "Vehicle updated."
    else
      render :edit, status: :unprocessable_entity
    end
  end

  def destroy
    @vehicle.update(active: false)
    redirect_to vehicles_path, notice: "Vehicle deactivated."
  end

  private

  def set_vehicle
    @vehicle = Vehicle.find(params[:id])
  end

  def vehicles_for_status(status)
    case status
    when "inactive"
      Vehicle.where(active: false)
    when "all"
      Vehicle.all
    else
      Vehicle.where(active: true)
    end
  end

  def vehicle_params
    params.require(:vehicle).permit(
      :make,
      :model,
      :year,
      :color,
      :vin,
      :licence_plate,
      :current_odometer,
      :fuel_tank_size,
      :active
    )
  end

  def prepare_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)
    @fuel_entry ||= @vehicle.fuel_entries.build(date: Date.current)
    @maintenance_entry ||= @vehicle.maintenance_entries.build(date: Date.current)
  end

  def maintenance_schedule_statuses(schedules)
    schedules.index_with do |schedule|
      latest_entry = latest_maintenance_entry_for(schedule)
      status = MaintenanceScheduleStatus.new(schedule, latest_entry, current_odometer: @vehicle.current_odometer)
      MaintenanceNotification.record_status_change(schedule, status)
      status
    end
  end

  def latest_maintenance_entry_for(schedule)
    @vehicle.maintenance_entries
      .where("lower(name) = ?", schedule.maintenance_type.downcase)
      .order(date: :desc, created_at: :desc)
      .first
  end
end