#!/usr/bin/env bash
set -euo pipefail

# Calculate optimal gas price for ChainID 138 deployments
# Uses RPC gas price API and respects minimum gas price from config
#
# Usage:
#   GAS_PRICE=$(bash scripts/calculate-chain138-gas-price.sh)
#   echo "Gas price: $GAS_PRICE wei"

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"

# Load environment (suppress errors)
set +e
if [ -f "$PROJECT_ROOT/.env" ]; then
    source "$PROJECT_ROOT/.env" 2>/dev/null || true
fi
if [ -f "$PROJECT_ROOT/smom-dbis-138/.env" ]; then
    source "$PROJECT_ROOT/smom-dbis-138/.env" 2>/dev/null || true
fi
set -e

# RPC URL for ChainID 138
RPC_URL="${RPC_URL_138:-http://192.168.11.211:8545}"

# Minimum gas price from config (1 gwei = 1,000,000,000 wei)
MIN_GAS_PRICE_WEI="${MIN_GAS_PRICE_WEI:-1000000000}"

# Safety multiplier (10% buffer)
SAFETY_MULTIPLIER="${SAFETY_MULTIPLIER:-1.1}"

# Get current gas price from RPC
get_rpc_gas_price() {
    local rpc_url=$1
    cast gas-price --rpc-url "$rpc_url" 2>/dev/null || echo ""
}

# Calculate optimal gas price
calculate_optimal_gas_price() {
    # Try to get current gas price from RPC
    local current_gas_price=$(get_rpc_gas_price "$RPC_URL")
    
    # Use minimum if RPC call failed or returned 0
    if [ -z "$current_gas_price" ] || [ "$current_gas_price" = "0" ]; then
        current_gas_price="$MIN_GAS_PRICE_WEI"
    fi
    
    # Use the higher of current or minimum
    local base_gas_price=$current_gas_price
    if [ "$current_gas_price" -lt "$MIN_GAS_PRICE_WEI" ]; then
        base_gas_price="$MIN_GAS_PRICE_WEI"
    fi
    
    # Apply safety multiplier (using integer math: * 11 / 10 = 1.1)
    local optimal_gas_price=$((base_gas_price * 11 / 10))
    
    echo "$optimal_gas_price"
}

# Output gas price
calculate_optimal_gas_price