Class: Dscf::Marketplace::RouteOptimizationService

Inherits:
Object
  • Object
show all
Defined in:
app/services/dscf/marketplace/route_optimization_service.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(delivery_order) ⇒ RouteOptimizationService

Returns a new instance of RouteOptimizationService.



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# File 'app/services/dscf/marketplace/route_optimization_service.rb', line 6

def initialize(delivery_order)
  @delivery_order = delivery_order
end

Instance Attribute Details

#delivery_order ⇒ Object (readonly)

Returns the value of attribute delivery_order.



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# File 'app/services/dscf/marketplace/route_optimization_service.rb', line 4

def delivery_order
  @delivery_order
end

Instance Method Details

#optimize! ⇒ Object 



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# File 'app/services/dscf/marketplace/route_optimization_service.rb', line 10

def optimize!
  return unless delivery_order.pickup_address && delivery_order.delivery_stops.any?

  # 1. Collect Coordinates
  # Format: [[pickup_lat, pickup_lng], [stop1_lat, stop1_lng], ...]
  pickup_coords = [delivery_order.pickup_address.latitude.to_f, delivery_order.pickup_address.longitude.to_f]
  
  # We map stops to their dropoff coordinates. 
  # We need to keep track of the mapping between original index and stop ID to re-order later.
  stops = delivery_order.delivery_stops.includes(:dropoff_address).to_a
  stop_coords = stops.map { |stop| [stop.dropoff_address.latitude.to_f, stop.dropoff_address.longitude.to_f] }
  
  all_locations = [pickup_coords] + stop_coords

  # 2. Call Gebeta API
  response = GebetaService.new.tsp(all_locations)

  # 3. Process Response
  
  # New Response Format:
  # {
  #   "best_order": [
  #     {"lat":..., "lon":...},               # Start (Pickup)
  #     {"lat":..., "original_index": 2},     # Stop A
  #     {"lat":..., "original_index": 1}      # Stop B
  #   ],
  #   "total_distance": 13.474, # In KM? Diagnostic showed 13.474 for small distance. Need to verify unit.
  #   "time_taken": 1033.263,
  #   "Direction": [[lat,lon], ...]
  # }
  
  # 'best_order' includes the start point at index 0 (usually without original_index or it's 0/1 based?)
  # Based on diagnostic: "original_index": 2 for the 3rd point (index 2).
  # So original_index is 0-based index from the input array.
  
  best_order = response["best_order"]
  
  # Filter out the pickup location (which should be the first one, or original_index == 0)
  # We only want to re-sequence the STOPS.
  # Stops in 'stops' array correspond to input indices 1..N.
  
  ordered_stops_data = best_order.select { |node| node["original_index"].to_i > 0 }
  
  ActiveRecord::Base.transaction do
    ordered_stops_data.each_with_index do |node, seq_num|
      original_idx = node["original_index"]
      # stops array is 0-indexed, corresponding to input indices 1, 2, 3...
      # If original_idx is 1, it means stops[0]. If 2, stops[1].
      stop = stops[original_idx - 1]
      
      if stop
        stop.update!(sequence_number: seq_num + 1)
      end
    end

    # Update DeliveryOrder metrics
    # Check units: 
    # time_taken: 1033.263 (likely seconds ~ 17 mins for decent distance).
    # total_distance: 13.474. If this is KM, it's reasonable. (Distance between 9.02,38.80 and 9.028,38.75 is ~ small).
    # If meters, 13 meters is too small. 1000 seconds for 13 meters is wrong.
    # So total_distance is likely KM.
    
    distance_km = response["total_distance"].to_f
    
    delivery_order.update!(
      estimated_delivery_time: Time.current + response["time_taken"].to_f.seconds,
      estimated_delivery_price: calculate_price(distance_km * 1000), # pass meters to calc
      optimized_route: response["Direction"] 
    )
  end
end