#!/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}

final_path=$(ynh_app_setting_get $app final_path)

#=================================================
# SPECIFIC CODE
#=================================================
# 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.

# upgrade_level
old_upgrade_level="$(ynh_app_setting_get $app upgrade_level)"
upgrade_level="${YNH_CONFIG_MAIN_UNATTENDED_CONFIGURATION_UPGRADE_LEVEL:-$old_upgrade_level}"
# ynh_update
old_ynh_update="$(ynh_app_setting_get $app ynh_update)"
old_ynh_update=$(bool_to_true_false $old_ynh_update)
ynh_update="${YNH_CONFIG_MAIN_UNATTENDED_CONFIGURATION_YNH_UPDATE:-$old_ynh_update}"
# unattended_mail
old_unattended_mail="$(ynh_app_setting_get $app unattended_mail)"
unattended_mail="${YNH_CONFIG_MAIN_UNATTENDED_CONFIGURATION_UNATTENDED_MAIL:-$old_unattended_mail}"

# previous_apticron
old_previous_apticron="$(ynh_app_setting_get $app previous_apticron)"
old_previous_apticron=$(bool_to_true_false $old_previous_apticron)
previous_apticron="${YNH_CONFIG_MAIN_APTICRON_CONFIGURATION_PREVIOUS_APTICRON:-$old_previous_apticron}"
# previous_apticron_hour
old_previous_apticron_hour="$(cat /etc/cron.d/apticron | grep --max-count=1 "^#*0.*root if.*" | cut -d' ' -f2)"
previous_apticron_hour="${YNH_CONFIG_MAIN_APTICRON_CONFIGURATION_PREVIOUS_APTICRON_HOUR:-$old_previous_apticron_hour}"
# after_apticron
old_after_apticron="$(ynh_app_setting_get $app after_apticron)"
old_after_apticron=$(bool_to_true_false $old_after_apticron)
after_apticron="${YNH_CONFIG_MAIN_APTICRON_CONFIGURATION_AFTER_APTICRON:-$old_after_apticron}"
# after_apticron_hour
old_after_apticron_hour="$(tac /etc/cron.d/apticron | grep --max-count=1 "^#*0.*root if.*" | cut -d' ' -f2)"
after_apticron_hour="${YNH_CONFIG_MAIN_APTICRON_CONFIGURATION_AFTER_APTICRON_HOUR:-$old_after_apticron_hour}"

# unattended_verbosity
old_unattended_verbosity="$(ynh_app_setting_get $app unattended_verbosity)"
unattended_verbosity="${YNH_CONFIG_MAIN_PERIODIC_CONFIGURATION_UNATTENDED_VERBOSITY:-$old_unattended_verbosity}"

# Overwrite 02periodic config file
old_overwrite_periodic="$(ynh_app_setting_get $app overwrite_periodic)"
old_overwrite_periodic=$(bool_to_true_false $old_overwrite_periodic)
overwrite_periodic="${YNH_CONFIG_MAIN_OVERWRITE_FILES_OVERWRITE_PERIODIC:-$old_overwrite_periodic}"

#=================================================
# 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"

	echo "YNH_CONFIG_MAIN_UNATTENDED_CONFIGURATION_UPGRADE_LEVEL=$upgrade_level"
	echo "YNH_CONFIG_MAIN_UNATTENDED_CONFIGURATION_YNH_UPDATE=$ynh_update"
	echo "YNH_CONFIG_MAIN_UNATTENDED_CONFIGURATION_UNATTENDED_MAIL=$unattended_mail"

	echo "YNH_CONFIG_MAIN_APTICRON_CONFIGURATION_PREVIOUS_APTICRON=$previous_apticron"
	echo "YNH_CONFIG_MAIN_APTICRON_CONFIGURATION_PREVIOUS_APTICRON_HOUR=$previous_apticron_hour"
	echo "YNH_CONFIG_MAIN_APTICRON_CONFIGURATION_AFTER_APTICRON=$after_apticron"
	echo "YNH_CONFIG_MAIN_APTICRON_CONFIGURATION_AFTER_APTICRON_HOUR=$after_apticron_hour"

	echo "YNH_CONFIG_MAIN_PERIODIC_CONFIGURATION_UNATTENDED_VERBOSITY=$unattended_verbosity"

	echo "YNH_CONFIG_MAIN_OVERWRITE_FILES_OVERWRITE_PERIODIC=$overwrite_periodic"
}

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

apply_config() {
	# Change configuration if needed
	unattended_upgrades_config="/etc/apt/apt.conf.d/50unattended-upgrades"
	# upgrade_level
	if [ "$upgrade_level" != "$old_upgrade_level" ]
	then
		if [ "$upgrade_level" = "Security and updates" ]
		then
			# Uncomment lines in the config
			ynh_replace_string "//\( *\"o=Debian,a=stable\)" "  \1" "$unattended_upgrades_config"
			ynh_replace_string "//\( *\"o=Debian,a=stable-updates\)" "  \1" "$unattended_upgrades_config"
		else
			# Comment lines in the config
			ynh_replace_string "^  \( *\"o=Debian,a=stable\)" "//\1" "$unattended_upgrades_config"
			ynh_replace_string "^  \( *\"o=Debian,a=stable-updates\)" "//\1" "$unattended_upgrades_config"
		fi
		ynh_app_setting_set $app upgrade_level "$upgrade_level"
	fi
	# ynh_update
	if [ "$ynh_update" != "$old_ynh_update" ]
	then
		ynh_update=$(bool_to_01 $ynh_update)
		if [ "$ynh_update" -eq 1 ]
		then
			# Add YunoHost upgrade source
			ynh_replace_string "origin=Debian,codename=\${distro_codename},label=Debian-Security\";" \
				"&\n\n        //YunoHost upgrade\n        \"o=YunoHost,a=stable\";" "$unattended_upgrades_config"
		else
			# Remove lines about YunoHost
			sed --in-place '/YunoHost upgrade/d' "$unattended_upgrades_config"
			sed --in-place '/o=YunoHost/d' "$unattended_upgrades_config"
		fi
		ynh_app_setting_set $app ynh_update "$ynh_update"
	fi
	# unattended_mail
	if [ "$unattended_mail" != "$old_unattended_mail" ]
	then
		if [ "$unattended_mail" = "If an upgrade has been done" ]
		then
			# Allow mail to root
			ynh_replace_string "/*\(Unattended-Upgrade::Mail \)" "\1" "$unattended_upgrades_config"

			# Send mail even if there's no errors
			ynh_replace_string "/*\(Unattended-Upgrade::MailOnlyOnError \).*" "\1\"false\";" "$unattended_upgrades_config"

		elif [ "$unattended_mail" = "Only if there was an error" ]
		then
			# Allow mail to root
			ynh_replace_string "/*\(Unattended-Upgrade::Mail \)" "\1" "$unattended_upgrades_config"

			# Send mail only if there's an error
			ynh_replace_string "/*\(Unattended-Upgrade::MailOnlyOnError \).*" "\1\"true\";" "$unattended_upgrades_config"

		else	# "Never"
			# Comment "Unattended-Upgrade::Mail"
			ynh_replace_string "^\(Unattended-Upgrade::Mail \)" "//\1" "$unattended_upgrades_config"
		fi
		ynh_app_setting_set $app unattended_mail "$unattended_mail"
	fi

	# previous_apticron
	apticron_cron="/etc/cron.d/apticron"
	if [ "$previous_apticron" != "$old_previous_apticron" ]
	then
		previous_apticron=$(bool_to_01 $previous_apticron)
		if [ "$previous_apticron" = "1" ]
		then
			# Uncomment the first cron line
			ynh_replace_string "^#\(0 $old_previous_apticron_hour .*\)" "\1" "$apticron_cron"
		else
			# Comment the first cron line
			ynh_replace_string "^0 $old_previous_apticron_hour .*" "#&" "$apticron_cron"
		fi
		ynh_app_setting_set $app previous_apticron "$previous_apticron"
	fi
	# previous_apticron_hour
	if [ "$previous_apticron_hour" != "$old_previous_apticron_hour" ]
	then
		# Use sed instead of ynh_replace_string to avoid the 'global' argument
		sed --in-place "s/0 $old_previous_apticron_hour\( \* \* \* root if\)/0 $previous_apticron_hour\1/" "$apticron_cron"
		ynh_app_setting_set $app previous_apticron_hour "$previous_apticron_hour"
	fi
	# after_apticron
	if [ "$after_apticron" != "$old_after_apticron" ]
	then
		after_apticron=$(bool_to_01 $after_apticron)
		if [ "$after_apticron" = "1" ]
		then
			# Uncomment the second cron line
			ynh_replace_string "^#\(0 $old_after_apticron_hour .*\)" "\1" "$apticron_cron"
		else
			# Comment the second cron line
			ynh_replace_string "^0 $old_after_apticron_hour .*" "#&" "$apticron_cron"
		fi
		ynh_app_setting_set $app after_apticron "$after_apticron"
	fi
	# after_apticron_hour
	if [ "$after_apticron_hour" != "$old_after_apticron_hour" ]
	then
		# Use sed instead of ynh_replace_string to avoid the 'global' argument
		sed --in-place "s/0 $old_after_apticron_hour\( \* \* \* root if\)/0 $after_apticron_hour\1/" "$apticron_cron"
		ynh_app_setting_set $app after_apticron_hour "$after_apticron_hour"
	fi

	# unattended_verbosity
	if [ "$unattended_verbosity" != "$old_unattended_verbosity" ]
	then
		ynh_backup_if_checksum_is_different "/etc/apt/apt.conf.d/02periodic"

		ynh_replace_string "^APT::Periodic::Verbose \".*" "APT::Periodic::Verbose \"$unattended_verbosity\";" "/etc/apt/apt.conf.d/02periodic"
		ynh_app_setting_set $app unattended_verbosity "$unattended_verbosity"

		ynh_store_file_checksum "/etc/apt/apt.conf.d/02periodic"
	fi

	# Set overwrite_periodic
	overwrite_periodic=$(bool_to_01 $overwrite_periodic)
	ynh_app_setting_set $app overwrite_periodic "$overwrite_periodic"
}

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

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