#!/bin/bash

# RinCoin Solo Mining using Built-in Core Mining
# Uses RinCoin Core's generatetoaddress command

# Default address (can be overridden with command line parameter)
DEFAULT_ADDRESS="rin1qahvvv9d5f3443wtckeqavwp9950wacxfmwv20q"

# Get total CPU cores for default thread count
TOTAL_CORES=$(nproc)
DEFAULT_THREADS=$TOTAL_CORES

# Parse command line arguments
RIN_ADDRESS=""
THREAD_COUNT=""

# Parse arguments
while [[ $# -gt 0 ]]; do
    case $1 in
        -a|--address)
            RIN_ADDRESS="$2"
            shift 2
            ;;
        -t|--threads)
            THREAD_COUNT="$2"
            shift 2
            ;;
        -h|--help)
            echo "Usage: $0 [OPTIONS]"
            echo ""
            echo "Options:"
            echo "  -a, --address ADDRESS    RinCoin address to mine to (default: $DEFAULT_ADDRESS)"
            echo "  -t, --threads COUNT      Number of threads to use (default: $DEFAULT_THREADS)"
            echo "  -h, --help               Show this help message"
            echo ""
            echo "Examples:"
            echo "  $0                                    # Use defaults (all cores, default address)"
            echo "  $0 -a rin1q... -t 16                 # Custom address and 16 threads"
            echo "  $0 --address rin1q... --threads 8    # Custom address and 8 threads"
            exit 0
            ;;
        *)
            echo "Unknown option: $1"
            echo "Use -h or --help for usage information"
            exit 1
            ;;
    esac
done

# Set defaults if not provided
if [ -z "$RIN_ADDRESS" ]; then
    RIN_ADDRESS="$DEFAULT_ADDRESS"
    echo "No address provided, using default: $RIN_ADDRESS"
fi

if [ -z "$THREAD_COUNT" ]; then
    THREAD_COUNT="$DEFAULT_THREADS"
    echo "No thread count provided, using all cores: $THREAD_COUNT"
fi

# Validate thread count
if ! [[ "$THREAD_COUNT" =~ ^[0-9]+$ ]] || [ "$THREAD_COUNT" -lt 1 ] || [ "$THREAD_COUNT" -gt "$TOTAL_CORES" ]; then
    echo "❌ Error: Invalid thread count: $THREAD_COUNT"
    echo "Thread count must be between 1 and $TOTAL_CORES"
    exit 1
fi

echo "=== RinCoin Solo Mining (Built-in Core Mining) ==="
echo "CPU Cores Available: $TOTAL_CORES"
echo "Threads to Use: $THREAD_COUNT"
echo "Target Address: $RIN_ADDRESS"
echo ""
echo ""

# Configuration
RPC_HOST="127.0.0.1"
RPC_PORT="9556"
RPC_USER="rinrpc"
RPC_PASS="745ce784d5d537fc06105a1b935b7657903cfc71a5fb3b90"

# Function to call RPC
call_rpc() {
    local method="$1"
    local params="$2"
    
    curl -s --user "$RPC_USER:$RPC_PASS" \
        -H 'content-type: text/plain' \
        --data "{\"jsonrpc\":\"1.0\",\"id\":\"curl\",\"method\":\"$method\",\"params\":$params}" \
        "http://$RPC_HOST:$RPC_PORT/"
}

# Wait for node to be ready
echo "Waiting for RinCoin node to be ready..."
while true; do
    response=$(call_rpc "getblockchaininfo" "[]")
    if [[ $response != *"Loading block index"* ]]; then
        break
    fi
    echo "Node still loading... waiting 10 seconds"
    sleep 10
done

echo "✅ Node is ready!"
echo ""

# Load wallet if not already loaded
echo "Loading wallet..."
wallet_response=$(call_rpc "loadwallet" "[\"main\"]")
if [[ $wallet_response == *"error"* ]] && [[ $wallet_response == *"already loaded"* ]]; then
    echo "✅ Wallet already loaded"
else
    echo "✅ Wallet loaded successfully"
fi
echo ""

# Validate the provided address (basic check)
if [[ ! "$RIN_ADDRESS" =~ ^rin1[a-zA-Z0-9]{25,}$ ]]; then
    echo "❌ Error: Invalid RinCoin address format: $RIN_ADDRESS"
    echo "RinCoin addresses should start with 'rin1' and be ~30 characters long"
    exit 1
fi

echo "✅ Using RinCoin Address: $RIN_ADDRESS"
echo ""

# Get blockchain info
echo "Blockchain Status:"
blockchain_info=$(call_rpc "getblockchaininfo" "[]")
blocks=$(echo "$blockchain_info" | grep -o '"blocks":[^,]*' | cut -d':' -f2)
headers=$(echo "$blockchain_info" | grep -o '"headers":[^,]*' | cut -d':' -f2)
difficulty=$(echo "$blockchain_info" | grep -o '"difficulty":[^,]*' | cut -d':' -f2)

echo "Blocks: $blocks"
echo "Headers: $headers"
echo "Difficulty: $difficulty"
echo ""

echo "⚠️  IMPORTANT: Built-in Core Mining Limitations:"
echo "1. Uses CPU only (not GPU)"
echo "2. Very low hashpower compared to specialized miners"
echo "3. Extremely low chance of finding blocks solo"
echo "4. Best for testing, not profitable mining"
echo "5. Thread count affects mining attempts per cycle"
echo ""

echo "🚀 Starting Built-in Solo Mining..."
echo "Target Address: $RIN_ADDRESS"
echo "Threads: $THREAD_COUNT"
echo "Press Ctrl+C to stop mining"
echo ""

# Start built-in mining with specified thread count
# Note: RinCoin Core's generatetoaddress doesn't directly support thread count
# but we can run multiple instances or adjust the maxtries parameter
while true; do
    echo "Attempting to mine 1 block with $THREAD_COUNT threads..."
    
    # Adjust maxtries based on thread count for better distribution
    adjusted_tries=$((1000000 * THREAD_COUNT / TOTAL_CORES))
    
    mining_result=$(call_rpc "generatetoaddress" "[1, \"$RIN_ADDRESS\", $adjusted_tries]")
    
    if [[ $mining_result == *"result"* ]] && [[ $mining_result != *"[]"* ]]; then
        echo "🎉 BLOCK FOUND!"
        echo "Result: $mining_result"
        break
    else
        echo "No block found in this attempt (tries: $adjusted_tries). Retrying..."
        sleep 5
    fi
done