#!/bin/bash

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

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

#=================================================
# RETRIEVE ARGUMENTS
#=================================================

app=$YNH_APP_INSTANCE_NAME

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

#=================================================
# LOAD VALUES
#=================================================

# Load the real value from the app config or elsewhere.
# Then get the value from the form.
# If the form has a value for a variable, take the value from the form,
# Otherwise, keep the value from the app config.

# Overwrite nginx configuration
old_overwrite_nginx="$(ynh_app_setting_get --app=$app --key=overwrite_nginx)"
overwrite_nginx="${YNH_CONFIG_MAIN_OVERWRITE_FILES_OVERWRITE_NGINX:-$old_overwrite_nginx}"

# Overwrite php-fpm configuration
old_overwrite_phpfpm="$(ynh_app_setting_get --app=$app --key=overwrite_phpfpm)"
overwrite_phpfpm="${YNH_CONFIG_MAIN_OVERWRITE_FILES_OVERWRITE_PHPFPM:-$old_overwrite_phpfpm}"

# Type of admin mail configuration
old_admin_mail_html="$(ynh_app_setting_get $app admin_mail_html)"
admin_mail_html="${YNH_CONFIG_MAIN_GLOBAL_CONFIG_EMAIL_TYPE:-$old_admin_mail_html}"

# Footprint for php-fpm
old_fpm_footprint="$(ynh_app_setting_get --app=$app --key=fpm_footprint)"
fpm_footprint="${YNH_CONFIG_MAIN_PHP_FPM_CONFIG_FOOTPRINT:-$old_fpm_footprint}"

# Free footprint value for php-fpm
# Check if fpm_footprint is an integer
if [ "$fpm_footprint" -eq "$fpm_footprint" ] 2> /dev/null
then
    # If fpm_footprint is an integer, that's a numeric value for the footprint
    old_free_footprint=$fpm_footprint
    fpm_footprint=specific
else
    old_free_footprint=0
fi
free_footprint="${YNH_CONFIG_MAIN_PHP_FPM_CONFIG_FREE_FOOTPRINT:-$old_free_footprint}"

# Usage for php-fpm
old_fpm_usage="$(ynh_app_setting_get --app=$app --key=fpm_usage)"
fpm_usage="${YNH_CONFIG_MAIN_PHP_FPM_CONFIG_USAGE:-$old_fpm_usage}"

# php_forced_max_children for php-fpm
old_php_forced_max_children="$(ynh_app_setting_get --app=$app --key=php_forced_max_children)"
# If php_forced_max_children isn't into settings.yml, get the current value from the fpm config
if [ -z "$old_php_forced_max_children" ]; then
    old_php_forced_max_children="$(grep "^pm.max_children" "$fpm_config_dir/pool.d/$app.conf" | awk '{print $3}')"
fi
php_forced_max_children="${YNH_CONFIG_MAIN_PHP_FPM_CONFIG_FORCE_MAX_CHILDREN:-$old_php_forced_max_children}"

#=================================================
# SHOW_CONFIG FUNCTION FOR 'SHOW' COMMAND
#=================================================

show_config() {
    # here you are supposed to read some config file/database/other then print the values
    # ynh_return "YNH_CONFIG_${PANEL_ID}_${SECTION_ID}_${OPTION_ID}=value"

    ynh_return "YNH_CONFIG_MAIN_OVERWRITE_FILES_OVERWRITE_NGINX=$overwrite_nginx"
    ynh_return "YNH_CONFIG_MAIN_OVERWRITE_FILES_OVERWRITE_PHPFPM=$overwrite_phpfpm"

    ynh_return "YNH_CONFIG_MAIN_GLOBAL_CONFIG_EMAIL_TYPE=$admin_mail_html"

    ynh_return "YNH_CONFIG_MAIN_PHP_FPM_CONFIG_FOOTPRINT=$fpm_footprint"
    ynh_return "YNH_CONFIG_MAIN_PHP_FPM_CONFIG_FREE_FOOTPRINT=$free_footprint"
    ynh_return "YNH_CONFIG_MAIN_PHP_FPM_CONFIG_USAGE=$fpm_usage"
    ynh_return "YNH_CONFIG_MAIN_PHP_FPM_CONFIG_FORCE_MAX_CHILDREN=$php_forced_max_children"
}

#=================================================
# MODIFY THE CONFIGURATION
#=================================================

apply_config() {

    #=================================================
    # MODIFY OVERWRITTING SETTINGS
    #=================================================

    # Set overwrite_nginx
    ynh_app_setting_set --app=$app --key=overwrite_nginx --value="$overwrite_nginx"

    # Set overwrite_phpfpm
    ynh_app_setting_set --app=$app --key=overwrite_phpfpm --value="$overwrite_phpfpm"

    #=================================================
    # MODIFY EMAIL SETTING
    #=================================================

    # Set admin_mail_html
    ynh_app_setting_set --app=$app --key=admin_mail_html --value="$admin_mail_html"

    #=================================================
    # RECONFIGURE PHP-FPM
    #=================================================

    if [ "$fpm_usage" != "$old_fpm_usage" ] || \
        [ "$fpm_footprint" != "$old_fpm_footprint" ] || \
        [ "$free_footprint" != "$old_free_footprint" ] || \
        [ "$php_forced_max_children" != "$old_php_forced_max_children" ]
    then
        # If fpm_footprint is set to 'specific', use $free_footprint value.
        if [ "$fpm_footprint" = "specific" ]
        then
            fpm_footprint=$free_footprint
        fi

        if [ "$php_forced_max_children" != "$old_php_forced_max_children" ]
        then
            # Set php_forced_max_children
            if [ $php_forced_max_children -ne 0 ]
            then
                ynh_app_setting_set --app=$app --key=php_forced_max_children --value="$php_forced_max_children"
            else
                # If the value is set to 0, remove the setting
                ynh_app_setting_delete --app=$app --key=php_forced_max_children
            fi
        fi

        if [ "$fpm_footprint" != "0" ]
        then
            ynh_add_fpm_config --usage=$fpm_usage --footprint=$fpm_footprint
        else
            ynh_print_err --message="When selecting 'specific', you have to set a footprint value into the field below."
        fi
    fi
}

#=================================================
# GENERIC FINALIZATION
#=================================================
# SELECT THE ACTION FOLLOWING THE GIVEN ARGUMENT
#=================================================

case $1 in
    show) show_config;;
    apply) apply_config;;
esac