# Server Configuration
HOST=0.0.0.0
PORT=3000

# Database Configuration
DATABASE_URL=postgres://easyroute_user:easyroute_pass@localhost:5432/easyroute
TEST_DATABASE_URL=postgres://easyroute_user:easyroute_pass@localhost:5432/easyroute_test

# Redis Configuration
REDIS_URL=redis://localhost:6379

# External APIs
MAPBOX_API_KEY=your_mapbox_api_key_here

# Mapbox Proxy (src/bin/proxy.rs)
# PROXY_API_KEYS=client-key-1,client-key-2  # comma-separated client keys
# PROXY_RATE_LIMIT=20                       # requests/min per key (default: 20)
# PROXY_PORT=4000                           # proxy listen port (default: 4000)

# On-device client: uncomment to route Mapbox calls through the proxy
# MAPBOX_BASE_URL=http://localhost:4000/v1/directions
# MAPBOX_API_KEY=client-key-1              # use a client key, not the real Mapbox key

# Logging
RUST_LOG=info,easyroute=debug

# Cache TTL (seconds)
ROUTE_CACHE_TTL=86400      # 24 hours
POI_REGION_CACHE_TTL=604800 # 7 days

# Route Generation
SNAP_RADIUS_M=100.0        # Distance in meters to snap POIs to route path

# Route Generation Algorithm Parameters
# These parameters control how the route generator selects POIs and creates loops.
# Adjust these to fine-tune route quality and success rate.

# POI Search Radius (multiplier of target distance)
# For a 5km route with multiplier 1.0, searches within 5km radius
# Higher values find more distant POIs for longer routes
ROUTE_POI_SEARCH_RADIUS_MULTIPLIER=1.0

# Waypoint Distance (multiplier of target distance)
# For loop geometry, POIs should be ~60% of target distance from start
# Higher values create larger loops with more distance
ROUTE_WAYPOINT_DISTANCE_MULTIPLIER=0.6

# Maximum POI Distance (multiplier of target distance)
# POIs beyond this distance from start are filtered out
# 0.85 allows POIs up to 85% of target distance (e.g., 4.25km for 5km route)
ROUTE_MAX_POI_DISTANCE_MULTIPLIER=0.85

# Minimum POI Distance (km)
# POIs must be at least this far from the start point
# Prevents selecting POIs too close to origin
ROUTE_MIN_POI_DISTANCE_KM=0.3

# Tolerance Levels (as fractions, e.g., 0.3 = ±30%)
# Relaxed tolerance applied on first retry
ROUTE_TOLERANCE_LEVEL_RELAXED=0.3
# Very relaxed tolerance applied on subsequent retries
ROUTE_TOLERANCE_LEVEL_VERY_RELAXED=0.5

# Default Distance Tolerance (as percentage, e.g., 0.2 = ±20%)
# Applied to user's requested distance if not specified
ROUTE_DEFAULT_DISTANCE_TOLERANCE_PCT=0.2

# Maximum Retries
# Number of times to retry route generation with relaxed constraints
ROUTE_MAX_GENERATION_RETRIES=5

# Waypoint Counts
# Number of waypoints to use for short routes (<4km)
ROUTE_WAYPOINTS_COUNT_SHORT=2
# Number of waypoints to use for long routes (>=4km or many POIs)
# More waypoints create more complex loops with longer distances
ROUTE_WAYPOINTS_COUNT_LONG=4

# Route Classification Thresholds
# Distance (km) above which routes are considered "long"
# Routes >=4km use more waypoints for better distance accuracy
ROUTE_LONG_ROUTE_THRESHOLD_KM=4.0
# POI count threshold for using more waypoints
# If 3+ POIs available, use long route configuration
ROUTE_POI_COUNT_THRESHOLD_LONG=3