#!/bin/bash
# Pre-Run Validation Script
# Validates environment before starting MEV bot

set -e

echo "========================================="
echo "MEV Bot Pre-Run Validation"
echo "========================================="

ERRORS=0

# Check RPC endpoints
echo "[1/5] Checking RPC endpoints..."
if [ -z "$ARBITRUM_RPC_ENDPOINT" ]; then
    echo "❌ ARBITRUM_RPC_ENDPOINT not set"
    ERRORS=$((ERRORS + 1))
else
    echo "✅ ARBITRUM_RPC_ENDPOINT: $ARBITRUM_RPC_ENDPOINT"
fi

# Check for wss:// or https:// prefix
echo "[2/5] Validating endpoint format..."
if [[ "$ARBITRUM_RPC_ENDPOINT" == wss://* ]] || [[ "$ARBITRUM_RPC_ENDPOINT" == https://* ]]; then
    echo "✅ Endpoint format valid"
else
    echo "❌ Endpoint must start with wss:// or https://"
    ERRORS=$((ERRORS + 1))
fi

# Check log directory
echo "[3/5] Checking log directory..."
if [ -d "logs" ]; then
    echo "✅ Log directory exists"

    # Check for excessive zero addresses in recent logs
    if [ -f "logs/liquidity_events_$(date +%Y-%m-%d).jsonl" ]; then
        ZERO_COUNT=$(grep -c "0x0000000000000000000000000000000000000000" "logs/liquidity_events_$(date +%Y-%m-%d).jsonl" 2>/dev/null || echo 0)
        echo "Zero addresses in today's events: $ZERO_COUNT"
        if [ "$ZERO_COUNT" -gt 10 ]; then
            echo "⚠️  WARNING: High zero address count detected"
        fi
    fi
else
    mkdir -p logs
    echo "✅ Created log directory"
fi

# Check binary exists
echo "[4/5] Checking binary..."
if [ -f "./mev-bot" ] || [ -f "./bin/mev-bot" ]; then
    echo "✅ MEV bot binary found"
else
    echo "❌ MEV bot binary not found. Run 'make build' first"
    ERRORS=$((ERRORS + 1))
fi

# Check for port conflicts
echo "[5/5] Checking for port conflicts..."
if lsof -Pi :9090 -sTCP:LISTEN -t >/dev/null 2>&1; then
    echo "⚠️  WARNING: Port 9090 (metrics) already in use"
fi

if lsof -Pi :8080 -sTCP:LISTEN -t >/dev/null 2>&1; then
    echo "⚠️  WARNING: Port 8080 (dashboard) already in use"
fi

echo ""
echo "========================================="
if [ $ERRORS -eq 0 ]; then
    echo "✅ Validation PASSED - Safe to start"
    exit 0
else
    echo "❌ Validation FAILED - $ERRORS error(s) found"
    exit 1
fi