#!/bin/bash                                                               
                                                                 
# Default values                                                                 
TYPE="postgres"
SERVICE=""             
CONTAINER=""        
ENV_FILE=".env"    
ALREADY_UP=true      

while getopts "t:s:c:e:" opt
do                                                  
        case "$opt" in                         
                t) TYPE="$OPTARG";;
                s) SERVICE="$OPTARG";;
                c) CONTAINER="$OPTARG";;
                e) ENV_FILE="$OPTARG";;
        esac
done                                                         
                    
###                                                     
# Preparation                                  
FILENAME="${SERVICE}_$(date +"%Y%m%d-%H%M").sql"
mkdir -p /srv/apps/$SERVICE/dump
rm -rf /srv/apps/$SERVICE/dump/*
                                                  
# Load env file (user, db name)
source /srv/apps/$SERVICE/$ENV_FILE
cd /srv/apps/$SERVICE/                 
                 
# Check if the service was up or not, to stop it if necessarry in the end
if [ -z `docker-compose ps -q $CONTAINER` ] || [ -z `docker ps -q --no-trunc | grep $(docker-compose ps -q $CONTAINER)` ]; then
        echo "Service not running, starting it…"
        docker-compose -f /srv/apps/$SERVICE/docker-compose.yml up -d $CONTAINER
        ALREADY_UP=false                 
else               
        echo "Service already running."
fi          
                                                                                      
# Dump (within the container)                                                        
if [ $TYPE == "postgres" ]                                                      
then                                                                                  
        docker-compose \                                                              
                -f /srv/apps/$SERVICE/docker-compose.yml\      
                exec -T $CONTAINER\
                pg_dump -U $POSTGRES_USER -d $POSTGRES_DB -f /$FILENAME
elif [ $TYPE == "mysql" ]
then                
        docker-compose \
                -f /srv/apps/$SERVICE/docker-compose.yml\    
                exec -T $CONTAINER\
                mysqldump -u $MYSQL_USER --databases $MYSQL_DATABASE -p${MYSQL_PASSWORD} -r /$FILENAME
fi
      
                                                                                
# Copy the dump file to host                  
echo "Copying the dump file to host…"
docker cp ${SERVICE}_${CONTAINER}_1:/$FILENAME /srv/apps/$SERVICE/dump
                                                                                                 
# Compressing                                                                                
echo "Compressing $FILENAME…"                                                                   
gzip /srv/apps/$SERVICE/dump/$FILENAME                                                       
#docker exec -ti ${SERVICE}_${CONTAINER}_1 cat /$FILENAME > /srv/apps/$SERVICE/dump/$FILENAME
                                                                                                       
#docker-compose -f /srv/apps/${SERVICE}/docker-compose.yml exec -T ${CONTAINER} cat /${FILENAME} > /srv/apps/$SERVICE/dump/$FILENAME
                                                                                          
# Remove the dump file in the container
docker-compose \
        -f /srv/apps/$SERVICE/docker-compose.yml\
        exec -T $CONTAINER rm /$FILENAME -v


if ! $ALREADY_UP ; then
        echo "Stopping service"
        docker-compose -f /srv/apps/$SERVICE/docker-compose.yml stop $CONTAINER
fi