#!/bin/bash

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

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

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

app=${YNH_APP_INSTANCE_NAME:-$YNH_APP_ID}

#=================================================
# SPECIFIC CODE
#=================================================
# DECLARE GENERIC FUNCTION
#=================================================

config_file="/etc/minidlna.conf"

get_config_value() {
	option_name="$1"
	# Get the value of this option in the config file
	grep "^$option_name=" "$config_file" | cut -d'=' -f2
}

#=================================================
# 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.

# root_container
old_root_container="$(get_config_value root_container)"
root_container="${YNH_CONFIG_MAIN_MINIDLNA_CONFIGURATION_ROOT_CONTAINER:-$old_root_container}"

# friendly_name
old_friendly_name="$(get_config_value friendly_name)"
friendly_name="${YNH_CONFIG_MAIN_MINIDLNA_CONFIGURATION_FRIENDLY_NAME:-$old_friendly_name}"

# Overwrite settings.json file
old_overwrite_settings="$(ynh_app_setting_get --app=$app --key=overwrite_settings)"
overwrite_settings="${YNH_CONFIG_MAIN_OVERWRITE_FILES_OVERWRITE_SETTINGS:-$old_overwrite_settings}"

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

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

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

	if [ "$root_container" = "." ]; then
		root_container="Standard container"
	elif [ "$root_container" = "B" ]; then
		root_container="Browse Directory"
	elif [ "$root_container" = "M" ]; then
		root_container="Music"
	elif [ "$root_container" = "P" ]; then
		root_container="Pictures"
	elif [ "$root_container" = "V" ]; then
		root_container="Video"
	fi
	ynh_return "YNH_CONFIG_MAIN_MINIDLNA_CONFIGURATION_ROOT_CONTAINER=$root_container"
	ynh_return "YNH_CONFIG_MAIN_MINIDLNA_CONFIGURATION_FRIENDLY_NAME=$friendly_name"

	ynh_return "YNH_CONFIG_MAIN_OVERWRITE_FILES_OVERWRITE_SETTINGS=$overwrite_settings"

	ynh_return "YNH_CONFIG_MAIN_GLOBAL_CONFIG_EMAIL_TYPE=$admin_mail_html"
}

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

apply_config() {
	restart_minidlna=0

	# Change configuration if needed
	# root_container
	if [ "$root_container" = "Standard container" ]; then
		root_container="."
	elif [ "$root_container" = "Browse Directory" ]; then
		root_container="B"
	elif [ "$root_container" = "Music" ]; then
		root_container="M"
	elif [ "$root_container" = "Pictures" ]; then
		root_container="P"
	elif [ "$root_container" = "Video" ]; then
		root_container="V"
	fi
	if [ "$root_container" != "$old_root_container" ]
	then
		ynh_replace_string --match_string="root_container=.*" --replace_string="root_container=$root_container" --target_file="$config_file"
		ynh_app_setting_set --app=$app --key=root_container --value="$root_container"
		restart_minidlna=1
	fi

	# friendly_name
	if [ "$friendly_name" != "$old_friendly_name" ]
	then
		ynh_replace_string --match_string="friendly_name=.*" --replace_string="friendly_name=$friendly_name" --target_file="$config_file"
		ynh_app_setting_set --app=$app --key=friendly_name --value="$friendly_name"
		restart_minidlna=1
	fi

	if [ $restart_minidlna -eq 1 ]
	then
		ynh_systemd_action --service_name=$app --action="restart"
	fi

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

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

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

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