#!/bin/bash
####### Usage check
[[ $# -ne 5 ]] && echo -e "Please provide the SQL scripts directory, username, hostname, database and password nUSAGE: ./ecs_test.sh /directory username hostname dbname password" && exit

####### access / store db information
cd $1
user=$2
host=$3
database=$4
pass=$5

######## DB Version store
mysql -u $user -h $host -p$pass -D $database -e "SELECT version FROM versionTable" > dbvers.out
CURRENT_DB_VERSION=`cat dbvers.out | grep -o '[0-9]+'`
highest_upgrade_version=`ls $(pwd) | grep -Eo '[0-9]+' | sort -rn | head -n 1 | awk 'NR' |  sed 's/^0*//'`

######### create list of scripts and order them
ls $(pwd) | grep .sql | sort -n >> scripts_list.txt

while [[ $CURRENT_DB_VERSION -lt $highest_upgrade_version || $CURRENT_DB_VERSION -eq $highest_upgrade_version ]]
do
    next_script_to_execute=`grep -Eo $CURRENT_DB_VERSION scripts_list.txt | sort -n | head -n 1`
    if [[ $next_script_to_execute -gt $CURRENT_DB_VERSION || -z $next_script_to_execute ]]
            then
        ((CURRENT_DB_VERSION++))
    elif [[ $CURRENT_DB_VERSION -lt 9 ]]
            then
        for i in $(ls $(pwd) | sort -n| grep -E "^[0]" | grep $CURRENT_DB_VERSION| head -1);
                    do mysql -u $user -h $host -p$pass -D $database < $i
        echo $i "is currently being executed"
        ((CURRENT_DB_VERSION++))
                    done
    else
        for i in $(ls $(pwd) | sed 's/^[1-9]*+ //' | grep -E $CURRENT_DB_VERSION | sort -n | head -n 1); do mysql -u $user -h $host -p$pass -D $database < $i
        ((CURRENT_DB_VERSION++))
                    echo $i "is currently being executed"
        done
            fi
done

((CURRENT_DB_VERSION--))
echo "Current version of the Database is: "$CURRENT_DB_VERSION
mysql -u $user -h $host -p$pass -D $database -e "UPDATE versionTable SET version = $CURRENT_DB_VERSION"

### cleanup temp files
rm -rf scripts_list.txt
rm -rf dbvers.out