#!/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)

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Ensuring downward compatibility..." --weight=1

# Following the discussion here https://github.com/YunoHost-Apps/synapse_ynh/pull/51 we decided to remove definitely the support of the old package migration.
if [ -z "$synapse_old_version" ]
then
    ynh_die --message="Update from this synapse version is not available. You need to remove this package and reinstall the new package version."
fi

#=================================================
# 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

# 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

# Define $e2e_enabled_by_default if not already defined
if [ -z $e2e_enabled_by_default ] ; then
    e2e_enabled_by_default="invite"
    ynh_app_setting_set --app=$app --key=e2e_enabled_by_default --value=$e2e_enabled_by_default
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 [ -z $report_stats ]; then
    report_stats="false"
    ynh_app_setting_set --app=$app --key=report_stats --value=$report_stats
fi

# Get app name of first Element Instance
element_ynh_url="https://matrix.to/"
web_client_location=$element_ynh_url
client_base_url=$element_ynh_url
invite_client_location=$element_ynh_url

if [ -z "$web_client_location" ]
then
    element_instance="element"
    if yunohost --output-as plain app list | grep -q "^$element_instance"'$'; then
        element_domain=$(ynh_app_setting_get --app $element_instance --key domain)
        element_path=$(ynh_app_setting_get --app $element_instance --key path)
        element_ynh_url="https://""$element_domain""$element_path"
    fi
    web_client_location=$element_ynh_url
    client_base_url=$element_ynh_url
    invite_client_location=$element_ynh_url
    ynh_app_setting_set --app=$app --key=web_client_location --value=$web_client_location
    ynh_app_setting_set --app=$app --key=client_base_url --value=$client_base_url
    ynh_app_setting_set --app=$app --key=invite_client_location --value=$invite_client_location
fi

if [ -z "$allow_public_rooms_without_auth" ]
then
    allow_public_rooms_without_auth=${allow_public_rooms:-false}
    ynh_app_setting_set --app=$app --key=allow_public_rooms_without_auth --value=$allow_public_rooms_without_auth
fi
if [ -z "$allow_public_rooms_over_federation" ]
then
    allow_public_rooms_over_federation=${allow_public_rooms:-false}
    ynh_app_setting_set --app=$app --key=allow_public_rooms_over_federation --value=$allow_public_rooms_over_federation
fi
if [ -z "$max_upload_size" ]
then
    max_upload_size="100M"
    ynh_app_setting_set --app=$app --key=max_upload_size --value=$max_upload_size
fi
if [ -z "$disable_msisdn_registration" ]
then
    disable_msisdn_registration="true"
    ynh_app_setting_set --app=$app --key=disable_msisdn_registration --value=$disable_msisdn_registration
fi
if [ -z "$registrations_require_3pid" ]
then
    registrations_require_3pid="none"
    ynh_app_setting_set --app=$app --key=registrations_require_3pid --value=$registrations_require_3pid
fi
if [ -z "$allowed_local_3pids_email" ]
then
    allowed_local_3pids_email="'^[^@]+@""matrix""\.org$'"
    ynh_app_setting_set --app=$app --key=allowed_local_3pids_email --value=$allowed_local_3pids_email
fi
if [ -z "$allowed_local_3pids_msisdn" ]
then
    allowed_local_3pids_msisdn="'\+33'"
    ynh_app_setting_set --app=$app --key=allowed_local_3pids_msisdn --value=$allowed_local_3pids_msisdn
fi
if [ -z "$account_threepid_delegates_msisdn" ]
then
    account_threepid_delegates_msisdn=""
    ynh_app_setting_set --app=$app --key=account_threepid_delegates_msisdn --value=$account_threepid_delegates_msisdn
fi
if [ -z "$allow_guest_access" ]
then
    allow_guest_access="false"
    ynh_app_setting_set --app=$app --key=allow_guest_access --value=$allow_guest_access
fi
if [ -z "$default_identity_server" ]
then
    default_identity_server="https://matrix.org"
    ynh_app_setting_set --app=$app --key=default_identity_server --value=$default_identity_server
fi
if [ -z "$auto_join_rooms" ]
then
    auto_join_rooms="#auto_join_room:""$server_name"
    ynh_app_setting_set --app=$app --key=auto_join_rooms --value=$auto_join_rooms
fi
if [ -z "$autocreate_auto_join_rooms" ]
then
    autocreate_auto_join_rooms="false"
    ynh_app_setting_set --app=$app --key=autocreate_auto_join_rooms --value=$autocreate_auto_join_rooms
fi
if [ -z "$auto_join_rooms_for_guests" ]
then
    auto_join_rooms_for_guests="true"
    ynh_app_setting_set --app=$app --key=auto_join_rooms_for_guests --value=$auto_join_rooms_for_guests
fi
if [ -z "$enable_notifs" ]
then
    enable_notifs="true"
    ynh_app_setting_set --app=$app --key=enable_notifs --value=$enable_notifs
fi
if [ -z "$notif_for_new_users" ]
then
    notif_for_new_users="true"
    ynh_app_setting_set --app=$app --key=notif_for_new_users --value=$notif_for_new_users
fi
if [ -z "$enable_group_creation" ]
then
    enable_group_creation="true"
    ynh_app_setting_set --app=$app --key=enable_group_creation --value=$enable_group_creation
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 [ "$is_free_registration" -eq "0" ]
  then
      enable_registration="false"
      turn_allow_guests="false"
      sso_enabled="true"
      password_enabled="false"
      enable_3pid_lookup="false"
  else
      enable_registration="true"
      turn_allow_guests="true"
      sso_enabled="false"
      password_enabled="true"
      enable_3pid_lookup="true"
  fi
  ynh_app_setting_set --app=$app --key=enable_registration --value=$enable_registration
  ynh_app_setting_set --app=$app --key=turn_allow_guests --value=$turn_allow_guests
  ynh_app_setting_set --app=$app --key=sso_enabled --value=$sso_enabled
  ynh_app_setting_set --app=$app --key=password_enabled --value=$password_enabled
  ynh_app_setting_set --app=$app --key=enable_3pid_lookup --value=$enable_3pid_lookup
fi

if [ -z "$push_include_content" ]
then
    push_include_content="true"
    ynh_app_setting_set --app=$app --key=push_include_content --value=$push_include_content
fi

if [ -z $synapse_user_app_pwd ]; then
    synapse_user_app_pwd="$(ynh_string_random --length=30)"
    ynh_app_setting_set --app=$app --key=synapse_user_app_pwd --value=$synapse_user_app_pwd
    # The format to create an user account varies depending on the version of YunoHost currently installed.
    yunohost user create $YNH_APP_ID -F "Synapse Application" -d $domain -p "$synapse_user_app_pwd"
fi

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

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

if [ -e "/var/lib/matrix-$app" ]; then
    ynh_script_progression --message="Moving data directory to $data_path..." --weight=1
    if [ -e "$data_path" ]; then
        old_data_dir_path="$data_path$(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_path" "$old_data_dir_path"
    fi
    mv "/var/lib/matrix-$app" "$data_path"
fi
if ! grep -q "$code_dir" /etc/passwd; then
    # matrix-synapse:x:994:994::/var/lib/matrix-synapse:/usr/sbin/nologin
    sed --in-place -r "s@matrix-$app\:x\:([[:digit:]]+\:[[:digit:]]+)\:\:/.*/matrix-$app\:/usr/sbin/nologin@matrix-$app\:x\:\1\:\:$code_dir\:/usr/sbin/nologin@g" /etc/passwd
fi

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

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

    adduser $YNH_APP_ID 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

    openssl dhparam -out /etc/ssl/private/dh2048.pem -outform PEM -2 2048 -dsaparam 2> /dev/null
    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

######################################### WARNING ################################

# TODO manage of migration of data path
# TODO manage of migration of db name
# TODO delete legacy user matrix-synapse
# TODO maybe need to close port to leave managed port to manage this

#=================================================
# 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

    # Go in virtualenvironnement
    u_arg='u'
    set +$u_arg;
    source $code_dir/bin/activate
    set -$u_arg;

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

    # This function was defined when we called "source $code_dir/bin/activate". With this function we undo what "$code_dir/bin/activate" does
    set +$u_arg;
    deactivate
    set -$u_arg;

    # 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

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

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

configure_synapse

#=================================================
# 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 $YNH_APP_ID: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"

# 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 matrix-$app --log "/var/log/matrix-$app/homeserver.log" --needs_exposed_ports $port_synapse_tls
yunohost service add coturn-$app --needs_exposed_ports $port_turnserver_tls

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

# Create systemd service for synapse and turnserver
cp ../conf/default_matrix-synapse /etc/default/matrix-$app
ynh_add_systemd_config --service=matrix-$app --template=matrix-synapse.service

cp ../conf/default_coturn /etc/default/coturn-$app
ynh_add_systemd_config --service=coturn-$app --template=coturn-synapse.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"'$'; then
        ynh_""permission_url --permission=server_client_infos --url=$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..." --weight=3
set_permissions

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

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

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