#!/bin/bash

#=================================================
# GENERIC START
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

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

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

app=$YNH_APP_INSTANCE_NAME

final_path=$(ynh_app_setting_get --app="$app" --key=final_path)

#=================================================
# CHECK VERSION
#=================================================
ynh_script_progression --message="Checking version..."

upgrade_type=$(ynh_check_app_version_changed)

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

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	# Restore it if the upgrade fails
	ynh_restore_upgradebackup
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping a systemd service..."

ynh_systemd_action --service_name="$app" --action="stop" --line_match="Stopped" --log_path="systemd"

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

# Change to head file
if [ -f "/etc/$app/config.d/server.toml" ]
then
	ynh_delete_file_checksum --file="/etc/$app/config.d/server.toml"
	mv "/etc/$app/config.d/server.toml" "/etc/$app/config.d/server.toml.head"
	ynh_store_file_checksum --file="/etc/$app/config.d/server.toml.head"
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="$app" --home_dir="$final_path"

usermod -a -G ssl-cert "$app"

#=================================================
# 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="$final_path/build"
	ynh_secure_remove --file="$final_path/live"
	mkdir -p "$final_path/live"
fi

chmod 750 "$final_path"
chmod -R o-rwx "$final_path"
chown -R "$app":"$app" "$final_path"

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

ynh_install_app_dependencies "$pkg_dependencies"

#=================================================
# SPECIFIC UPGRADE
#=================================================
# MAKE INSTALL
#=================================================
ynh_script_progression --message="Making install..."

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	# Install rustup with the toolchain needed by Gemserv
	pushd "$final_path"
		ynh_exec_as "$app" RUSTUP_HOME="$final_path"/.rustup CARGO_HOME="$final_path"/.cargo bash -c 'curl -sSf -L https://static.rust-lang.org/rustup.sh | sh -s -- -y --default-toolchain nightly'
	popd

	export PATH="$PATH:$final_path/.cargo/bin:$final_path/.local/bin:/usr/local/sbin" 

	# Compile Gemserv
	pushd "$final_path"/build
		ynh_exec_warn_less ynh_exec_as "$app" env PATH="$PATH" cargo build --release
	popd

	# Install Gemserv
	cp -af "$final_path/build/target/release/gemserv" "$final_path/live/gemserv"

	# Remove build files and rustup
	ynh_secure_remove --file="$final_path/build"
	ynh_secure_remove --file="$final_path/.cargo"
	ynh_secure_remove --file="$final_path/.rustup"
fi

#=================================================
# UPDATE A CONFIG FILE
#=================================================
ynh_script_progression --message="Updating a configuration file..."

mkdir -p "/etc/$app/config.d/"

chmod 750 "/etc/$app"
chmod -R o-rwx "/etc/$app"
chown -R "$app":"$app" "/etc/$app"

ynh_add_config --template="server.toml" --destination="/etc/$app/config.d/server.toml.head"

chmod 400 "/etc/$app/config.d/server.toml.head"
chown "$app":"$app" "/etc/$app/config.d/server.toml.head"

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Upgrading systemd configuration..."

# Create a dedicated systemd config
ynh_add_systemd_config

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

# Use logrotate to manage app-specific logfile(s)
ynh_use_logrotate --non-append

#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
ynh_script_progression --message="Integrating service in YunoHost..."

yunohost service add "$app" --description="$app daemon" --log="/var/log/$app/$app.log" --needs_exposed_ports="1965"

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..."

ynh_systemd_action --service_name="$app" --action="start" --line_match="Started" --log_path="systemd"

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

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