#!/bin/bash

DIR="$( cd "$( dirname "$0"  )" && pwd  )"

source $DIR/lib.sh
source $DIR/conf.sh

trap 'trap_abort' INT QUIT TERM HUP
trap 'trap_exit' EXIT

usage() {
	echo "verifier.sh - Compares repository hashes."
    echo
	echo "Usage: ./verifier.sh [options]"
    echo
    echo "Options:"
    echo
    echo "    -h:    Show help information."
    echo "    -d:    Show debug info."
    echo
	echo "Examples:"
    echo
    echo "    verifier.sh -d    :: Show debug output."
}

ARGS=("$@")
for (( a = 0; a < $#; a++ )); do
    if [[ ${ARGS[$a]} == "-h" ]]; then
        usage;
        exit 0;
    elif [[ ${ARGS[$a]} == "-d" ]]; then
        DEBUG=1
    fi
done

compute_local_repo_hash() {
    # $1: The repository to compute
    # Sets LOCAL_REPO_HASH
    msg2 "Computing local $1 repository hashes..."
    LFILES=$(cd $AZB_REPO_BASEPATH; sha256sum $1/*/* | sort -r)
    debug "Repository hash list:"
    debug "$LFILES"
    LOCAL_REPO_HASH=$(echo "$LFILES" | sha256sum | cut -f 1 -d' ')
    msg2 "Local hash: $LOCAL_REPO_HASH"
}

compute_remote_repo_hash() {
    # $1: The repository to compute
    # Sets REMOTE_REPO_HASH
    msg2 "Computing remote $1 repository hashes..."
    RFILES=$(ssh $AZB_REMOTE_LOGIN "cd webapps/default; sha256sum $1/*/* | sort -r")
    debug "Repository hash list:"
    debug "$RFILES"
    REMOTE_REPO_HASH=$(echo "$RFILES" | sha256sum | cut -f 1 -d' ')
    msg2 "Remote hash: $REMOTE_REPO_HASH"
}

# Bail if no internet
if [[ $(ping -w 1 -c 1 8.8.8.8 &> /dev/null; echo $?) != 0 ]]; then
    exit 0;
fi

msg "verifier.sh started..."

HAS_ERROR=0
for REPO in 'demz-repo-archiso' 'demz-repo-core'; do
    msg "Checking ${REPO}..."
    # compare_repo $REPO
    compute_local_repo_hash $REPO
    compute_remote_repo_hash $REPO
    if [[ $LOCAL_REPO_HASH != $REMOTE_REPO_HASH ]]; then
        error "The $REPO is out of sync!"
        HAS_ERROR=1
        continue
    fi
    msg2 "$REPO is in sync"
done

if [[ $HAS_ERROR -eq 1 ]]; then
    exit 1;
fi