#!/bin/bash

#=================================================
# GENERIC START
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

source _common.sh
source experimental_helper.sh
source /usr/share/yunohost/helpers

#=================================================
# SET ALL CONSTANT
#=================================================

upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# MIGRATION 5 : Manage old settings
#=================================================

# Migrate from settings 'special_domain' to 'domain' and 'special_path' to 'path'
if [ -z "${domain:-}" ]; then
    domain=$(ynh_app_setting_get --app=$app --key=special_domain)
    path=$(ynh_app_setting_get --app=$app --key=special_path)
    ynh_app_setting_set --app=$app --key=domain --value=$domain
    ynh_app_setting_set --app=$app --key=path --value=$path
    ynh_app_setting_delete --app=$app --key=special_domain
    ynh_app_setting_delete --app=$app --key=special_path
    ynh_app_setting_set --app=$app --key=no_sso --value=true
fi

ensure_vars_set

# Define $server_name if not already defined
if [ -z "${server_name:-}" ]; then
    server_name=$domain
    ynh_app_setting_set --app=$app --key=server_name --value=$domain
fi

# Define $jitsi_server if not already defined
if [ -z "${jitsi_server:-}" ]; then
    jitsi_server='jitsi.riot.im'
    ynh_app_setting_set --app=$app --key=jitsi_server --value=$jitsi_server
fi

if [ "$e2e_enabled_by_default" = "true" ] ; then
    e2e_enabled_by_default="all"
    ynh_app_setting_set --app=$app --key=e2e_enabled_by_default --value=$e2e_enabled_by_default
fi
if [ "$e2e_enabled_by_default" = "false" ]; then
    e2e_enabled_by_default="off"
    ynh_app_setting_set --app=$app --key=e2e_enabled_by_default --value=$e2e_enabled_by_default
fi

if [ "${registrations_require_3pid}" == none ]
then
    registrations_require_3pid=email
    ynh_app_setting_set --app=$app --key=registrations_require_3pid --value=$registrations_require_3pid
fi
if [[ "${allowed_local_3pids_email}" =~ \'.*\' ]] # Also remove shit value from previous config panel
then
    allowed_local_3pids_email=''
    ynh_app_setting_set --app=$app --key=allowed_local_3pids_email --value=$allowed_local_3pids_email
fi
if [[ "${allowed_local_3pids_msisdn}" =~ \'.*\' ]] # Also remove shit value from previous config panel
then
    allowed_local_3pids_msisdn=''
    ynh_app_setting_set --app=$app --key=allowed_local_3pids_msisdn --value=$allowed_local_3pids_msisdn
fi

if [ -z "${enable_registration:-}" ]
then
  if [ -z "${is_free_registration:-}" ]; then
      is_free_registration=$(ynh_app_setting_get --app=$app --key=is_""public)
  fi

  if [ "$is_free_registration" -eq "0" ]
  then
      enable_registration="false"
      password_enabled="false"

  else
      enable_registration="true"
      password_enabled="true"
  fi
  ynh_app_setting_set --app=$app --key=enable_registration --value=$enable_registration
  ynh_app_setting_set --app=$app --key=password_enabled --value=$password_enabled
fi

# remove legacy env file into /etc/default
ynh_secure_remove --file=/etc/default/coturn-$app

#=================================================
# MIGRATION 7 : STANDARDIZE SYSTEMD UNIT
#=================================================

if [ -e /etc/systemd/system/matrix-$app.service ]
then
    ynh_script_progression --message='Migrating systemd unit to standard name...'

    systemctl stop matrix-$app.service || true
    systemctl stop coturn-$app.service || true

    yunohost service remove matrix-$app || true
    yunohost service remove coturn-$app || true

    ynh_secure_remove --file=/etc/systemd/system/matrix-$app.service
    ynh_secure_remove --file=/etc/systemd/system/coturn-$app.service

    touch /etc/systemd/system/$app.service
    systemctl daemon-reload || true
fi

#=================================================
# STOP SERVICES
#=================================================

# We stop the service
ynh_systemd_action --service_name=$app.service --action=stop

ynh_script_progression --message='Managing migrations...'

#=================================================
# MIGRATION 6 : Migrate data directory
#=================================================

if [ -e "/var/lib/matrix-$app" ]; then
    ynh_script_progression --message="Moving data directory to $data_dir..." --weight=1
    if [ -e "$data_dir" ]; then
        old_data_dir_path="$data_dir$(date '+%Y%m%d.%H%M%S')"
        ynh_print_warn "A data directory already exist. Data was renamed to $old_data_dir_path"
        mv "$data_dir" "$old_data_dir_path"
    fi
    mv "/var/lib/matrix-$app" "$data_dir"
fi

#=================================================
# MIGRATION 3 : USE STANDARD ACCESS FOR CERTIFCATE
#=================================================

# Fix issue about certificates access
if [ ! $(grep "ssl-cert:x:[0-9]*:.*$app" /etc/group) ]
then
    ynh_script_progression --message="Use standard access for certificate..." --weight=1

    adduser $app ssl-cert
    adduser turnserver ssl-cert
fi

#=================================================
# MIGRATION 4 : CREATE A DH FILE
#=================================================

# WARNING : theses command are used in INSTALL, UPGRADE, RESTORE
# For any update do it in all files

# Make dh cert for synapse if it doesn't exist
if [ ! -e /etc/ssl/private/dh2048.pem ]
then
    ynh_script_progression --message="Creating a dh file..." --weight=1

    ynh_exec_warn_less openssl dhparam -out /etc/ssl/private/dh2048.pem -outform PEM -dsaparam 2048
    chown root:ssl-cert /etc/ssl/private/dh2048.pem
    chmod 640 /etc/ssl/private/dh2048.pem
fi

#=================================================
# MIGRATION 2 : MULTINSTANCE SUPPORT
#=================================================

if [ ! -e /etc/matrix-$app/coturn.conf ]
then
    ynh_script_progression --message="Creating an independant service for coturn..." --weight=1

    #=================================================
    # CREATE AN INDEPENDANT SERVICE FOR COTURN
    #=================================================

    # Disable default config for turnserver and create a new service
    systemctl stop coturn.service

    #=================================================
    # MAKE A CLEAN LOGROTATE CONFIG
    #=================================================

    ynh_use_logrotate --logfile=/var/log/matrix-$app --nonappend
fi

#=================================================
# MIGRATION 8 : Migrate database to managed database (Migrate db name from matrix_$app to $app)
#=================================================

if ynh_psql_execute_as_root --sql='\list' | grep matrix_$app; then
    ynh_''psql_remove_db --db_user="user_wich_must_dont_exist_and_keep_current_user" --db_name=$db_name
    ynh_psql_execute_as_root --sql="ALTER DATABASE matrix_$app RENAME TO $db_name;"
    ynh_psql_execute_as_root --database=$db_name --sql="REASSIGN OWNED BY matrix_$app TO $db_user;"
    ynh_psql_execute_as_root --sql="UPDATE pg_database SET datcollate='C', datctype='C' WHERE datname='$db_name';"
    ynh_psql_execute_as_root --sql="DROP USER matrix_$app;"
    # for unknown reason we need to set again the password for synapse user. Without this synapse can't authenticate to postgresql
    ynh_psql_execute_as_root --sql="ALTER USER $db_user WITH ENCRYPTED PASSWORD '$db_pwd';"
fi

#=================================================
# MIGRATION 9 : migrate data path (from matrix-$app to $app)
#=================================================

if [ -e /home/yunohost.app/matrix-$app ]; then
    mv -t $data_dir /home/yunohost.app/matrix-$app/*
    ynh_secure_remove --file=/home/yunohost.app/matrix-$app
fi

#=================================================
# MIGRATION 11 : make this app using full domain
#=================================================

ynh_app_setting_set --app=$app --key=path --value=/

if yunohost app map -r --output-as json | jq -r '."'$domain'" | select( . != null ) | .[] | .id' | grep -v "$app" -q; then
    ynh_print_warn 'An other app is installed on this domain. Now synapse require to be alone on the domain.'
    ynh_print_warn 'To solve this you can:'
    ynh_print_warn " - Remove or move all other app which use '$domain'"
    ynh_print_warn ' - Change the domain of synapse. You can find more informations here: https://github.com/YunoHost-Apps/synapse_ynh/tree/testing/doc/ADMIN.md#change-url'
    ynh_print_warn 'For more information you can see this issue: https://github.com/YunoHost-Apps/synapse_ynh/issues/443'
fi

#=================================================
# MIGRATION 12 : update system user and drop yunohost user
#=================================================

if grep -q "^matrix-$app" /etc/passwd; then
    # Must stop php before remove user as user is used by php
    systemctl stop php$YNH_PHP_VERSION-fpm.service

    ynh_''system_user_delete --username=matrix-"$app" || true
    yunohost user delete $app || true
    ynh_''system_user_create --username=$app --home_dir=$code_dir
    adduser $app ssl-cert
fi

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================

if [ "$upgrade_type" == "UPGRADE_APP" ] || [ ! -e $code_dir/bin/python3 ] || [ ! -e $code_dir/lib/python$python_version ]
then
    ynh_script_progression --message="Upgrading source files..." --weight=6
    install_sources
fi

#=================================================
# MIGRATION 1 : GENERATE SYNAPSE SECRET
#=================================================

if [ -z "${registration_shared_secret:-}" ] || [ "$form_secret" == "form_secret: " ]
then
    ynh_script_progression --message="Generating synapse secret..." --weight=1

    # Generate config and keys
    $code_dir/bin/python -m synapse.app.homeserver --keys-directory /etc/matrix-$app/ --generate-config --generate-keys --server-name $server_name --report-stats=no -c homeserver.yml

    # Get random values from config
    registration_shared_secret=$(egrep "^registration_shared_secret:" homeserver.yml | cut -d'"' -f2)
    form_secret=$(egrep "^form_secret:" homeserver.yml | cut -d'"' -f2)

    # store in yunohost settings
    ynh_app_setting_set --app=$app --key=registration_shared_secret --value="$registration_shared_secret"
    ynh_app_setting_set --app=$app --key=form_secret --value="$form_secret"
fi

#=================================================
# MIGRATION 13 : ADD SLIDING PROXY DB
#=================================================
ynh_script_progression --message="Updating db if needed..."

if ! ynh_''psql_database_exists -d $db_name_slidingproxy; then
    ynh_''psql_setup_db --db_user=$db_user --db_pwd=$db_pwd --db_name=$db_name_slidingproxy
fi

#=================================================
# STANDARD UPGRADE STEPS
#=================================================

#=================================================
# UPDATE SYNAPSE CONFIG
#=================================================
ynh_script_progression --message="Updating synapse config..." --weight=2

# Force enable it because some client like Element X don't support CAS and so require to have password authentication enabled
password_enabled=true

ynh_add_config --jinja --template="homeserver.yaml" --destination="/etc/matrix-$app/homeserver.yaml"
ynh_add_config --template="log.yaml" --destination="/etc/matrix-$app/log.yaml"
ynh_add_config --template=sliding_proxy.conf --destination=/etc/matrix-$app/sliding_proxy.conf

#=================================================
# CREATE SMALL CAS SERVER
#=================================================
# WARNING : theses command are used in INSTALL, UPGRADE
# For any update do it in all files

mkdir -p $install_dir
cp ../sources/cas_server.php $install_dir/
chmod u=rwX,g=rX,o= -R $install_dir
chown $app:root -R $install_dir


#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=2

# Create a dedicated php-fpm config
ynh_script_progression --message="Configuring application..."

ynh_add_fpm_config --usage=low --footprint=low

configure_nginx

#=================================================
# SPECIFIC UPGRADE
#=================================================
# UPDATE COTURN CONFIG
#=================================================
ynh_script_progression --message="Updating Coturn config..." --weight=1

configure_coturn

#=================================================
# ADD SCRIPT FOR COTURN CRON AND APP SERVICE
#=================================================

# WARNING : theses command are used in INSTALL, UPGRADE
# For any update do it in all files

ynh_add_config --template="../sources/Coturn_config_rotate.sh" --destination="$code_dir/Coturn_config_rotate.sh"
ynh_add_config --template="../sources/update_synapse_for_appservice.sh" --destination="$code_dir/update_synapse_for_appservice.sh"
ynh_add_config --template=../sources/set_admin_user.sh --destination=$code_dir/set_admin_user.sh

# Ensure app-service folder has exists and the config file exit (Migration)
mkdir -p /etc/matrix-$app/app-service
if [ -e /etc/matrix-$app/conf.d/app_service.yaml ]; then
    # ensure that the file is empty if no app service are installed (fix issue #385)
    if [ ! "$(ls -A /etc/matrix-$app/app-service)" ]; then
        echo "" > /etc/matrix-$app/conf.d/app_service.yaml
    fi
else
    touch /etc/matrix-$app/conf.d/app_service.yaml
fi

#=================================================
# ADVERTISE SERVICE IN ADMIN PANEL
#=================================================

yunohost service add $app --log "/var/log/matrix-$app/homeserver.log" --needs_exposed_ports $port_synapse_tls --description 'Main matrix server service.'
yunohost service add $app-coturn --needs_exposed_ports $port_turnserver_tls --description 'Turn server for matrix server. Used for audio and video call.'
yunohost service add $app-sliding-proxy --description 'Matrix v2 service for clients.'

#=================================================
# UPDATE SYSTEMD
#=================================================
ynh_script_progression --message="Upgrading systemd configuration..." --weight=3

# Create systemd service for synapse and turnserver
ynh_add_systemd_config --service=$app --template=synapse.service

cp ../conf/default_coturn /etc/matrix-$app/coturn_env
ynh_add_systemd_config --service=$app-coturn --template=synapse-coturn.service

ynh_add_systemd_config --service=$app-sliding-proxy --template=synapse-sliding-proxy.service

#=================================================
# UPGRADE FAIL2BAN
#=================================================
ynh_script_progression --message="Reconfiguring Fail2Ban..." --weight=8

ynh_add_fail2ban_config --use_template

#=================================================
# GENERIC FINALIZATION
#=================================================
# SETUP PERMISSIONS
#=================================================

ynh_script_progression --message="Configuring permissions..." --weight=1

if yunohost --output-as plain domain list | grep -q "^$server_name"'$'; then
    if ! ynh_""permission_exists --permission=server_client_infos; then
        ynh_""permission_create --permission=server_client_infos --url=$server_name/.well-known/matrix \
                              --label="Server info for clients. (well-known)" --show_tile=false --allowed=visitors \
                              --auth_header=false --protected=true
    else yunohost --output-as plain domain list | grep -q "^$server_name"'$'
        ynh_""permission_url --permission=server_client_infos --url=$server_name/.well-known/matrix \
                          --auth_header=false
        ynh_""permission_update --permission=server_client_infos --label="Server info for clients. (well-known)" --show_tile=false \
                              --protected=true
    fi
fi

#=================================================
# SECURE FILES AND DIRECTORIES
#=================================================

ynh_script_progression --message="Protecting directories... (note that it could take a long time depending of your install size)" --weight=3
set_permissions data

#=================================================
# UPDATE HOOKS
#=================================================

# WARNING : theses command are used in INSTALL, UPGRADE
# For any update do it in all files
ynh_replace_string __APP__ $app ../hooks/post_cert_update
ynh_replace_string __DOMAIN__ $domain ../hooks/post_cert_update

#=================================================
# RELOAD SERVICES
#=================================================
ynh_script_progression --message="Restarting Synapse services..." --weight=5

ynh_systemd_action --service_name=$app-coturn.service --action=restart
ynh_systemd_action --service_name=$app.service --action=restart --line_match="Synapse now listening on TCP port $port_synapse_tls" --log_path="/var/log/matrix-$app/homeserver.log" --timeout=300
ynh_systemd_action --service_name=$app-sliding-proxy.service --action=restart

#=================================================
# END OF SCRIPT
#=================================================

ynh_script_progression --message="Upgrade of $app completed" --last