#!/usr/bin/env bash

REPO='git@github.com:Username/repo.git';
APP_DIR='/var/www/site/path';
BRANCH=master

DB_USER=SomeUser
DB_PASS=SomePassword
DB_NAME=database

BUILD="build";
ACTIVE="active"
PREVIOUS="previous_`date +%y%m%d-%H%M%S`";

STEP=1

function log_step
{
  echo "Step $STEP: $1..." 1>&2
  STEP=$((STEP+1))
}

function error_exit
{
  echo "ERROR, aborting: $1!" 1>&2
  exit 1
}

# Enter app dir (create if not exist)
[ -d $APP_DIR ] || mkdir $APP_DIR;
cd $APP_DIR || error_exit "Can not enter application directory";

# Delete it if already exist
[ -d $BUILD ] && rm -rf $BUILD && log_step "Deleted existing build directory"

# Git clone
log_step "Fetch latest code";
git clone -b $BRANCH $REPO $BUILD || error_exit "Unable to clone";

# Enter build dir
cd $APP_DIR/$BUILD || error_exit "Can not enter build directory";

# Composer
log_step "Install Composer packages";
composer install --prefer-dist --no-scripts --no-dev || error_exit "Composer install failed";

# npm
log_step "Install npm packages"
npm install || error_exit "NPM install failed";

# Optimize Laravel
log_step "Clean compiled and optimize"
php artisan clear-compiled --env=production || error_exit "Laravel clean-compiled failed";
php artisan optimize --env=production || error_exit "Laravel optimize failed";

# gulp
log_step "Build assets"
gulp --production || error_exit "Gulp failed";

# Environment file
log_step "Copying environment file";
cp $APP_DIR/$ACTIVE/.env .env || error_exit "Copying of environment file failed";

# DB dump
log_step "Backup database";
mysqldump -u $DB_USER -p$DB_PASS $DB_NAME > $APP_DIR/$ACTIVE/db_deploy.sql || error_exit "DB dump failed";

# Migrate
log_step "Database migration";
php artisan migrate --force --env=production || error_exit "Database migration failed";

# Permissions
log_step "Settings permissions";
chgrp www-data -R bootstrap/cache/;
chgrp www-data -R storage/;
chmod -R g+w,o-w bootstrap/cache/;
chmod -R g+w,o-w storage/;

# Replacing web app
log_step "Stopping web sever and queue handler";
sudo service nginx stop;
sudo service queue stop;

log_step "Swapping folders";
mv $APP_DIR/$ACTIVE $APP_DIR/$PREVIOUS || error_exit "Failed to move active folder to previous";
mv $APP_DIR/$BUILD $APP_DIR/$ACTIVE || error_exit "Failed to move build folder to active";

log_step "Starting web sever and queue handler";
sudo service nginx start;
sudo service queue start;

log_step "Finishing up, setting cache";
cd $APP_DIR/$ACTIVE;
php artisan config:cache --env=production;
php artisan route:cache --env=production;

echo "Deploy complete :D"