#!/bin/bash

# IMPORT GENERIC HELPERS
source _common.sh
source /usr/share/yunohost/helpers

# https://codeberg.org/ChriChri/flohmarkt_ynh/issues/9
# check if couchdb is already installed
# if there's a couchdb configuration file for flohmarkt we'll assume that couchdb
# had been installed by flohmarkt and we thus can savely do whatever we want to it
# with the resulting damage hopefully only influencing flohmarkt instances
if [[ -e /opt/couchdb ]] || pgrep epmd > /dev/null || pgrep beam.smp || dpkg-query -W couchdb > /dev/null 2>&1 \
  && ![[ -e /opt/couchdb/etc/local.d/05-flohmarkt.ini ]];
then
  ynh_die --message="CouchDB already installed on this host - will not proceed."
  exit 1
fi

# INITIALIZE AND STORE SETTINGS
# todo: do we need to store the password un-encrypted somewhere on the system?
# → there's no way to get the admin password later if sometimes in the future deleting
#   the app will delete its specific database only (instead of the whole couchdb server as
#   of now in the earliest versions of the integration).
ynh_app_setting_set --app=$app --key=password_couchdb_admin --value="$password_couchdb_admin"

# get port, admin_pw for already installed couchdb
# skip the installation steps below
ynh_script_progression --message="Installing CouchDB..." --weight=60

# A CouchDB node has an Erlang magic cookie value set at startup.
# This value must match for all nodes in the cluster. If they do not match,
# attempts to connect the node to the cluster will be rejected.
couchdb_magic_cookie=$(ynh_string_random --length=23 --filter='A-Za-z0-9_')
ynh_app_setting_set --app=$app --key=couchdb_magic_cookie --value="$couchdb_magic_cookie"

# update couchdb dpkg
flohmarkt_ynh_up_inst_couchdb

# stop couchdb
flohmarkt_ynh_stop_couchdb

# add couchdb configuration
ynh_script_progression --message="Adding a configuration file..." --weight=2
# customize couchdb config
ynh_add_config --template="../conf/05-flohmarkt.ini" --destination="/opt/couchdb/etc/local.d/05-flohmarkt.ini"
chown root:couchdb /opt/couchdb/etc/local.d/05-flohmarkt.ini
chmod 640 /opt/couchdb/etc/local.d/05-flohmarkt.ini

# restart couchdb to pick up changes
flohmarkt_ynh_start_couchdb

# get flohmarkt
# suspecting that this deletes all other sources for YNH_APP_ID
ynh_setup_source --dest_dir="$flohmarkt_app_dir"

# setup python environment for flohmarkt
ynh_secure_remove "$flohmarkt_venv_dir"
flohmarkt_ynh_create_venv
flohmarkt_ynh_venv_requirements

# JwtSecret
# workaround for https://github.com/YunoHost/issues/issues/2379
jwtsecret=$(ynh_string_random -l 200 -f 'a-zA-Z0-9/+'; ynh_string_random -l 142 -f 'a-zA-Z0-9/+'; echo -n '==')
ynh_app_setting_set --app=$app --key=jwtsecret --value="$jwtsecret"

password_couchdb_flohmarkt=$(ynh_string_random --length=31 --filter='A-Za-z0-9_.:,')
ynh_app_setting_set --app=$app --key=password_couchdb_flohmarkt --value="$password_couchdb_flohmarkt"

# generate flohmarkt.conf
ynh_add_config --template="../conf/flohmarkt.conf" --destination="$flohmarkt_app_dir/flohmarkt.conf"

# setup couchdb
(
    set +o nounset
    source "$flohmarkt_venv_dir/bin/activate"
    set -o nounset
    cd "$flohmarkt_app_dir"
    # initialize_couchdb seems to re-try on connect problems endlessly blocking the yunohost api
    # give it 45 seconds to finish and then fail
    # https://codeberg.org/ChriChri/flohmarkt_ynh/issues/13
    timeout 45 python3 initialize_couchdb.py $password_couchdb_admin
)

# SETUP LOGROTATE
ynh_script_progression --message="Configuring log rotation..." --weight=2
# Use logrotate to manage application logfile(s)
ynh_use_logrotate --logfile=$flohmarkt_logfile

# NGINX CONFIGURATION
ynh_script_progression --message="Configuring NGINX web server..." --weight=3
# Create a dedicated NGINX config
ynh_add_nginx_config

# systemd.service
ynh_script_progression --message="Configuring a systemd service..." --weight=1
# Create a dedicated systemd config
ynh_add_systemd_config --service=$flohmarkt_filename
# integrate into yunohost
ynh_script_progression --message="Integrating service in YunoHost..." --weight=1
yunohost service add $flohmarkt_filename --description="A decentral federated small advertisement platform" --log="$flohmarkt_logfile"

#  logfile contains possibly the secret setup URL
mkdir -m755 -p "$flohmarkt_log_dir"
touch "$flohmarkt_logfile"
chmod 640 "$flohmarkt_logfile"

# set file permissions for install dir
flohmarkt_ynh_set_permission

# SETUP FAIL2BAN
ynh_script_progression --message="Configuring Fail2Ban..." --weight=3
ynh_add_fail2ban_config --logpath="$flohmarkt_logfile" --failregex='INFO: +<HOST>:\d+ - "POST /token HTTP/\d+\.\d+" 403 Forbidden' --max_retry=5

# symlink data_dir and install_dir to make it easier to find the
# files for a certain domain/path
ln -s "$flohmarkt_install" "$flohmarkt_sym_install"
ln -s "$flohmarkt_data_dir" "$flohmarkt_sym_data_dir"

# start service
flohmarkt_ynh_start_service

ynh_script_progression --message="Installation of $id completed" --last