#!/bin/bash

#=================================================
# GENERIC STARTING
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

# Load common variables for all scripts.
source _common.sh
source /usr/share/yunohost/helpers

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..." --weight=4

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get --app=$app --key=domain)
path_url=$(ynh_app_setting_get --app=$app --key=path)
is_public=$(ynh_app_setting_get --app=$app --key=is_public)
port=$(ynh_app_setting_get --app=$app --key=port)
always_encrypt=$(ynh_app_setting_get --app=$app --key=always_encrypt)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
secret=$(ynh_app_setting_get --app=$app --key=secret)

overwrite_settings=$(ynh_app_setting_get --app=$app --key=overwrite_settings)
overwrite_nginx=$(ynh_app_setting_get --app=$app --key=overwrite_nginx)
overwrite_systemd=$(ynh_app_setting_get --app=$app --key=overwrite_systemd)
admin_mail_html=$(ynh_app_setting_get --app=$app --key=admin_mail_html)

# Optional parameters from config-panel feature
antiflood=$(ynh_app_setting_get --app=$app --key=antiflood)
delay=$(ynh_app_setting_get --app=$app --key=delay)

#=================================================
# CHECK VERSION
#=================================================

upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Ensuring downward compatibility..." --weight=2

# Fix is_public as a boolean
if [ "$is_public" = "Yes" ]; then
    ynh_app_setting_set --app=$app --key=is_public --value=1
    is_public=1
elif [ "$is_public" = "No" ]; then
    ynh_app_setting_set --app=$app --key=is_public --value=0
    is_public=0
fi

skipped_uris=$(ynh_app_setting_get --app=$app --key=skipped_uris)

# Unused with the permission system
if [ ! -z "$skipped_uris" ]; then
    ynh_app_setting_delete --app=$app --key=skipped_uris
fi

# Create the permission "upload images" only if it doesn't exist.
if ! ynh_permission_exists --permission="upload images"
then
    # This is a fake permission without any URL.
    # The purpose of this permission is only to trigger hooks post_app_add/removeaccess when it's modified.
    # We can't use a real permission for now because the actual permision system doesn't support regex.
    ynh_permission_create --permission="upload images" --allowed="visitors"

    if [ $is_public -eq 0 ]
    then
        # If the app is private, viewing images stays publicly accessible.
        if [ "$path_url" == "/" ]; then
            # If the path is /, clear it to prevent any error with the regex.
            path_url=""
        fi
        # Modify the domain to be used in a regex
        domain_regex=$(echo "$domain" | sed 's@-@.@g')
        ynh_app_setting_set --app=$app --key=protected_regex --value="$domain_regex$path_url/stats/?$","$domain_regex$path_url/manifest.webapp/?$","$domain_regex$path_url/?$","$domain_regex$path_url/[d-m]/.*$"

        # If the app is not public, then the "visitors" group doesn't have this permission
        ynh_permission_update --permission="upload images" --remove="visitors"
    fi
fi

# if final_path isn't set, which can happens with old scripts, set final_path.
if [ -z "$final_path" ]; then
    final_path=/var/www/$app
    ynh_app_setting_set --app=$app --key=final_path --value=$final_path
fi

# Fix always_encrypt as a boolean
if [ "$always_encrypt" = "Yes" ]; then
    ynh_app_setting_set --app=$app --key=always_encrypt --value=1
    always_encrypt=1
elif [ "$always_encrypt" = "No" ]; then
    ynh_app_setting_set --app=$app --key=always_encrypt --value=0
    always_encrypt=0
fi

# If overwrite_settings doesn't exist, create it
if [ -z "$overwrite_settings" ]; then
    overwrite_settings=1
    ynh_app_setting_set --app=$app --key=overwrite_settings --value=$overwrite_settings
fi

# If overwrite_nginx doesn't exist, create it
if [ -z "$overwrite_nginx" ]; then
    overwrite_nginx=1
    ynh_app_setting_set --app=$app --key=overwrite_nginx --value=$overwrite_nginx
fi

# If overwrite_systemd doesn't exist, create it
if [ -z "$overwrite_systemd" ]; then
    overwrite_systemd=1
    ynh_app_setting_set --app=$app --key=overwrite_systemd --value=$overwrite_systemd
fi

# If secret doesn't exist, create it
if [ -z "$secret" ]; then
    secret=$(grep "secrets *=>" "$final_path/lutim.conf" | cut -d\' -f2)
    ynh_app_setting_set --app=$app --key=secret --value=$secret
fi

# Close opened port
if yunohost firewall list | grep -q "\- $port$"
then
    ynh_exec_quiet yunohost firewall disallow TCP $port
fi

# Replace skipped_uris by unprotected_uris for the migration to the new permission system.
ynh_app_setting_delete --app=$app --key=skipped_uris
ynh_app_setting_set --app=$app --key=unprotected_uris --value="/"

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before upgrading (may take a while)..." --weight=15

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
# Clean installation remaining that are not handle by the remove script.
    ynh_clean_check_starting
    # restore it if the upgrade fails
    ynh_restore_upgradebackup
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# ACTIVATE MAINTENANCE MODE
#=================================================
ynh_script_progression --message="Activating maintenance mode..." --weight=2

ynh_maintenance_mode_ON

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
    ynh_script_progression --message="Upgrading source files..."
    # Download, check integrity, uncompress and patch the source from app.src
    ynh_setup_source --dest_dir="$final_path"
fi

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=9

ynh_install_app_dependencies $pkg_depencencies

#=================================================
# NGINX CONFIGURATION
#=================================================

# Overwrite the nginx configuration only if it's allowed
if [ $overwrite_nginx -eq 1 ]
then
    ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=2
    ynh_add_nginx_config
fi

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Making sure dedicated system user exists..."

# Create a dedicated user (if not existing)
ynh_system_user_create --username=$app

#=================================================
# SPECIFIC UPGRADE
#=================================================
# SETUP LUTIM
#=================================================
ynh_script_progression --message="Reconfiguring $app..."

# Overwrite the settings config file only if it's allowed
if [ $overwrite_settings -eq 1 ]
then
    # Configure Lutim
    # Verify the checksum of a file, stored by `ynh_store_file_checksum` in the install script.
    ynh_backup_if_checksum_is_different --file="$final_path/lutim.conf"
    cp ../conf/lutim.conf.template "$final_path/lutim.conf"
    ynh_replace_string --match_string="__DOMAIN__" --replace_string="$domain" --target_file="$final_path/lutim.conf"
    ynh_replace_string --match_string="__PATH__" --replace_string="$path_url" --target_file="$final_path/lutim.conf"
    ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="$final_path/lutim.conf"
    ynh_replace_string --match_string="__ENCRYPT__" --replace_string="$always_encrypt" --target_file="$final_path/lutim.conf"
    ynh_replace_string --match_string="__SECRET__" --replace_string="$secret" --target_file="$final_path/lutim.conf"
    # Set the number of process for Lutim to twice the number of CPU core.
    ynh_replace_string --match_string="__WORKERS__" --replace_string="$(( $(nproc) * 2 ))" --target_file="$final_path/lutim.conf"
    # Recalculate and store the checksum of the file for the next upgrade.
    ynh_store_file_checksum --file="$final_path/lutim.conf"

    # Optional parameters from config-panel feature
    if [ -n "$antiflood" ]; then
        ynh_replace_string --match_string=".*anti_flood_delay *=>.*" --replace_string="    anti_flood_delay  => $antiflood," --target_file="$final_path/lutim.conf"
        # Disable anti_flood_delay if the delay is 0
        if [ $antiflood = 0 ]; then
            ynh_replace_string --match_string="\(anti_flood_delay *=>.*\)" --replace_string="#\1" --target_file="$final_path/lutim.conf"
        fi
    fi
    if [ -n "$delay" ]; then
        ynh_replace_string --match_string=".*default_delay *=>.*" --replace_string="    default_delay     => $delay," --target_file="$final_path/lutim.conf"
    fi
fi

#=================================================
# SETUP HOOKS FILE
#=================================================

ynh_replace_string --match_string="__APP__" --replace_string="$app" --target_file="../hooks/post_app_addaccess"
ynh_replace_string --match_string="__APP__" --replace_string="$app" --target_file="../hooks/post_app_removeaccess"

#=================================================
# SETUP SYSTEMD
#=================================================

# Overwrite the systemd configuration only if it's allowed
if [ $overwrite_systemd -eq 1 ]
then
    ynh_script_progression --message="Upgrading systemd configuration..." --weight=2
    ynh_add_systemd_config
fi

#=================================================
# SETUP CRON
#=================================================

cp ../conf/cron_lutim /etc/cron.d/$app
ynh_replace_string --match_string="__FINALPATH__" --replace_string="$final_path/" --target_file=/etc/cron.d/$app
ynh_replace_string --match_string="__APP__" --replace_string="$app" --target_file=/etc/cron.d/$app

#=================================================
# UPDATE LUTIM WITH CARTON
#=================================================

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
    ynh_script_progression --message="Upgrading $app with Carton..." --weight=4
    pushd "$final_path"
        ynh_secure_remove --file="$final_path/local"
        carton install --without=mysql --without=htpasswd --without=test
    popd
fi

#=================================================
# SECURING FILES AND DIRECTORIES
#=================================================

# Set permissions on app files
chown -R $app: $final_path

#=================================================
# GENERIC FINALISATION
#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Upgrading logrotate configuration..."

ynh_use_logrotate --non-append
chown $app -R /var/log/$app

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

yunohost service add $app --log="$final_path/log/production.log"

#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading NGINX web server..."

ynh_systemd_action --service_name=nginx --action=reload

#=================================================
# START AND CHECK LUTIM BOOTING
#=================================================
ynh_script_progression --message="Restarting Lutim..." --weight=4

# Wait for lutim to be fully started
ynh_systemd_action --action=restart --line_match="Manager.*started" --log_path="/var/log/$app/production.log" --timeout="120"

#=================================================
# DEACTIVE MAINTENANCE MODE
#=================================================
ynh_script_progression --message="Disabling maintenance mode..." --weight=7

ynh_maintenance_mode_OFF

#=================================================
# SEND A README FOR THE ADMIN
#=================================================

# Get main domain and buid the url of the admin panel of the app.
admin_panel="https://$(grep portal_domain /etc/ssowat/conf.json | cut -d'"' -f4)/yunohost/admin/#/apps/$app"

# Build the changelog
ynh_app_changelog || true

echo "You can find a config file at $final_path/lutim.conf

You can configure this app easily by using the experimental __URL_TAG1__config-panel feature__URL_TAG2__$admin_panel/config-panel__URL_TAG3__.
You can also find some specific actions for this app by using the experimental __URL_TAG1__action feature__URL_TAG2__$admin_panel/actions__URL_TAG3__.

If you're facing an issue or want to improve this app, please open a new issue in this __URL_TAG1__project__URL_TAG2__https://github.com/YunoHost-Apps/lutim_ynh__URL_TAG3__.

---

Changelog since your last upgrade:
$(cat changelog)" > mail_to_send

ynh_send_readme_to_admin --app_message="mail_to_send" --recipients="root" --type=upgrade

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

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