-- ============================================================
-- FreightDesk — Migration 007: Driver Location Tracking
-- GPS location history for real-time tracking
-- ============================================================

CREATE TABLE IF NOT EXISTS vehicle_locations (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  vehicle_id UUID NOT NULL REFERENCES vehicles(id) ON DELETE CASCADE,
  lat DECIMAL(10,8) NOT NULL,
  lng DECIMAL(11,8) NOT NULL,
  accuracy DECIMAL(8,2),
  heading DECIMAL(6,2),
  speed DECIMAL(6,2),
  recorded_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_vehicle_locations_vehicle ON vehicle_locations(vehicle_id);
CREATE INDEX IF NOT EXISTS idx_vehicle_locations_time ON vehicle_locations(recorded_at);
CREATE INDEX IF NOT EXISTS idx_vehicle_locations_vehicle_time ON vehicle_locations(vehicle_id, recorded_at DESC);

-- Add current location columns to vehicles
ALTER TABLE vehicles ADD COLUMN IF NOT EXISTS current_lat DECIMAL(10,8);
ALTER TABLE vehicles ADD COLUMN IF NOT EXISTS current_lng DECIMAL(11,8);

-- Enable PostGIS-like functionality with btree_gist for spatial queries
-- (In production, use PostGIS extension)
CREATE INDEX IF NOT EXISTS idx_vehicles_location ON vehicles(current_lat, current_lng)
  WHERE current_lat IS NOT NULL AND current_lng IS NOT NULL;