#!/usr/bin/env bash
# Post-startup Validator Verification
# Verifies validator started successfully after ExecStart

set -euo pipefail

# Colors
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m'

log_error() { echo -e "${RED}[ERROR]${NC} $1" >&2; }
log_warn() { echo -e "${YELLOW}[WARN]${NC} $1"; }
log_info() { echo -e "${GREEN}[INFO]${NC} $1"; }

check_process() {
    if pgrep -f "besu.*validator" > /dev/null; then
        log_info "Besu validator process is running"
        return 0
    else
        log_error "Besu validator process is NOT running"
        return 1
    fi
}

check_logs() {
    local error_count=$(journalctl -u besu-validator.service --no-pager -n 20 2>&1 | grep -iE "error|Error|ERROR|exception|Exception|failed|Failed" | wc -l || echo "0")
    
    if [ "$error_count" -gt 0 ]; then
        log_warn "Found $error_count error(s) in recent logs"
        return 1
    else
        log_info "No errors in recent logs"
        return 0
    fi
}

main() {
    log_info "Verifying validator startup..."
    
    local issues=0
    
    if ! check_process; then
        ((issues++))
    fi
    
    if ! check_logs; then
        ((issues++))
    fi
    
    if [ "$issues" -eq 0 ]; then
        log_info "Validator started successfully"
        exit 0
    else
        log_error "Validator startup verification failed"
        exit 1
    fi
}

main "$@"