"""
Configuration system for LoRa route simulation.

All parameters must be defined here - no hardcoded values allowed.
"""

# =============================================================================
# Network Topology
# =============================================================================
NODE_COUNT = 12  # Number of nodes in the network
AREA_SIZE = 800  # Deployment area size (meters)
SINK_NODE_ID = 0  # Sink node ID (root of the routing tree)

# =============================================================================
# Timing Parameters
# =============================================================================
HELLO_PERIOD = 8.0  # HELLO packet broadcast period (seconds)
DATA_PERIOD = 30.0  # Data packet generation period (seconds)
SIM_TIME = 1000.0  # Total simulation time (seconds)

# =============================================================================
# Radio Parameters
# =============================================================================
TX_POWER = 14  # Transmit power (dBm)
RSSI_THRESHOLD = -105  # Reception sensitivity threshold (dBm)
NOISE_SIGMA = 3  # Gaussian noise standard deviation (dB)
PATH_LOSS_EXPONENT = 2.7  # Path loss exponent (n)

# =============================================================================
# MAC Layer Parameters
# =============================================================================
ACK_TIMEOUT_FACTOR = 2.5  # ACK timeout = airtime × this factor
MAX_RETRY = 3  # Maximum transmission retries
BACKOFF_MIN = 0.0  # Minimum backoff time (seconds)
BACKOFF_MAX = 2.0  # Maximum backoff time (seconds)

# =============================================================================
# LoRa Physical Parameters
# =============================================================================
SF = 9  # Spreading Factor (7-12)
BW = 125000  # Bandwidth (Hz)
CR = 5  # Coding Rate (5-8, represents 4/5 to 4/8)
PREAMBLE = 8  # Preamble length (symbols)

# =============================================================================
# Routing Parameters
# =============================================================================
LINK_PENALTY_SCALE = 8.0  # Scale factor for link penalty calculation
ROUTE_UPDATE_THRESHOLD = 1.0  # Cost threshold for route update

# =============================================================================
# Logging
# =============================================================================
LOG_LEVEL = "INFO"  # DEBUG, INFO, WARNING, ERROR
LOG_FORMAT = "[{time:.1f}][NODE{nid:>3}][{event}] {message}"