#!/bin/bash

# Internal Initialization

source "${DIP_FUNCTIONS}"

if [[ -r "${DIP_BASE_DIR}/conf.d/${DIP_AGENT_NAME}.conf" ]]; then
    source "${DIP_BASE_DIR}/conf.d/${DIP_AGENT_NAME}.conf"
fi

if [[ -r "${DIP_BASE_DIR}/conf.d/${DIP_AGENT_EXEC}.conf" ]]; then
    source "${DIP_BASE_DIR}/conf.d/${DIP_AGENT_EXEC}.conf"
fi

if [[ -z "$agent_update_dns_r53_id" ]]; then
    logerr "ERROR: Need 'agent_update_dns_r53_id' to be defined to your Route53 Domain ID"
    exit 99
fi

if [[ -d "${DIP_BASE_DIR}/aws" ]]; then
    if [[ ! -r "${DIP_BASE_DIR}/aws/config" ]]; then
        logerr "ERROR: AWS config file not found: '${DIP_BASE_DIR}/aws/config'"
        exit 99
    elif [[ ! -r "${DIP_BASE_DIR}/aws/credentials" ]]; then
        logerr "ERROR: AWS credentials file not found: '${DIP_BASE_DIR}/aws/credentials'"
        exit 99
    else
        export AWS_CONFIG_FILE="${DIP_BASE_DIR}/aws/config"
        export AWS_SHARED_CREDENTIALS_FILE="${DIP_BASE_DIR}/aws/credentials"
    fi
else
    logerr "ERROR: AWS config directory not found. '${DIP_BASE_DIR}/aws/' is expected to exist and contain 'config' and 'credentials' for AWS access."
    exit 99
fi

if [[ -z "$DIP_CUR_IP" ]] || [[ -z "$DIP_OLD_IP" ]] || [[ -z "$DIP_RECORD" ]]; then
    logerr "ERROR: Agent expects currentip, existingip, and record."
    exit 98
fi


# Main

if valid_ipv4 "$DIP_CUR_IP"; then
    log "Updating Route53 DNS IPv4 Record"
    /usr/local/bin/cli53 rc --replace "$agent_update_dns_r53_id" "${DIP_RECORD}. 300 A ${DIP_CUR_IP}"
fi

if valid_ipv6 "$DIP_CUR_IP"; then
    log "Updating Route53 DNS IPv6 Record"
    /usr/local/bin/cli53 rc --replace "$agent_update_dns_r53_id" "${DIP_RECORD}. 300 AAAA ${DIP_CUR_IP}"
fi