#!/bin/bash

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

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

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping a systemd service..." --weight=1

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

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Ensuring downward compatibility..." --weight=1

# 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="Configuring system user..." --weight=1

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

#=================================================
# INSTALL RUST/CARGO
#=================================================
ynh_script_progression --message="Installing Rust and Cargo..." --weight=1

# Install rustup with the toolchain needed by Gemserv
pushd "$install_dir"
    ynh_exec_warn_less ynh_exec_as "$app" \
        RUSTUP_HOME="$install_dir/.rustup" \
        CARGO_HOME="$install_dir/.cargo" \
        curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs \
    | ynh_exec_as "$app" sh -s -- -q -y
popd

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================
ynh_script_progression --message="Upgrading source files..." --weight=1

# Download, check integrity, uncompress and patch the source from app.src
ynh_setup_source --dest_dir="$install_dir/build"

ynh_secure_remove --file="$install_dir/live"
mkdir -p "$install_dir/live"

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

#=================================================
# SPECIFIC UPGRADE
#=================================================
# BUILD APP
#=================================================
ynh_script_progression --message="Building app..." --weight=1

# Compile Gemserv
pushd "$install_dir/build"
    ynh_exec_warn_less ynh_exec_as "$app" bash -c "source $install_dir/.cargo/env; cargo build --release"
popd

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

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

#=================================================
# UPDATE A CONFIG FILE
#=================================================
ynh_script_progression --message="Updating a configuration file..." --weight=1

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

#=================================================
# REAPPLY SYSTEM CONFIGURATIONS
#=================================================
ynh_script_progression --message="Upgrading system configurations related to $app..." --weight=1

# Create a dedicated systemd config
ynh_add_systemd_config
yunohost service add "$app" --description="$app daemon" --log="/var/log/$app/$app.log" --needs_exposed_ports="1965"

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

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." --weight=1

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" --last