#!/bin/sh
# ======================================
# configure.sh v1.0; job79
# Generate caddy configuration based on
# the installed services.
# ======================================

set -eu
log() { printf '\e[%sm%s\e[0m %s\n' "${3:-36}" "${2:-○}" "$1"; }
ask() { printf '\e[33m?\e[0m %s ' "$1"; read a; [ "${a,,}" = 'y' ]; }

# gen_quadlet_file generates the caddy container quadlet file
gen_quadlet_file() {
	log 'start generating quadlet file'
	cat > "$CADDY_QUADLET_FILE" <<- EOF
		# ============================================================================
		# This file is generated by caddy/configure.sh, do not edit this file manually
		# ============================================================================
		[Container]
		Image=docker.io/caddy:2.7
		AutoUpdate=registry

		# storage
		Volume=caddy.volume:/data/caddy
		Volume=caddy-logs.volume:/data/logs
		Volume=%h/services/caddy/config:/etc/caddy:Z,ro

		# networking
		Network=caddy.network
		PublishPort=0.0.0.0:80:80
		PublishPort=0.0.0.0:443:443
		PublishPort=0.0.0.0:443:443/udp
	EOF

	log 'search for networks with caddy=true label'
	podman network ls -f label=caddy=true --format "{{.Name}}" | while read -r network; do
		log "found $network" '↖' 35
		echo "Network=$network" >> "$CADDY_QUADLET_FILE"
	done

	cat >> "$CADDY_QUADLET_FILE" <<- EOF
		# security
		ReadOnly=true
		NoNewPrivileges=true
		DropCapability=ALL
		AddCapability=NET_BIND_SERVICE

		[Service]
		Restart=always
		RestartSec=5

		[Install]
		WantedBy=multi-user.target default.target
	EOF
	log 'finished generating quadlet file' '✓' 32
}

# gen_config_dir generates the caddy config directory
gen_config_dir() {
	log 'generate caddy config directory with *.caddy files from services'
	find "$CADDY_CONFIG_DIR" -name '*.caddy' -exec rm {} \;
	find "$SERVICES_DIR" -name '*.caddy' -not -path "$CADDY_CONFIG_DIR/*" | while read -r in; do
		log "found $in" '↖' 35
		cp "$in" "$CADDY_CONFIG_DIR"
	done
	log 'finished generating caddy config directory' '✓' 32
}

## MAIN ##
SERVICES_DIR="$(dirname "$(dirname "$(realpath "$0")")")"
CADDY_QUADLET_FILE="$SERVICES_DIR/caddy/caddy.container"
CADDY_CONFIG_DIR="$SERVICES_DIR/caddy/config"

gen_quadlet_file
gen_config_dir

ask "apply config changes by reloading config (y/N)?" && \
        podman exec -w /etc/caddy systemd-caddy caddy reload && \
        log 'successfully applied config changes' '✓' 32

ask "restart caddy? required to join new networks (y/N)?" && \
        systemctl --user daemon-reload && \
        systemctl --user restart caddy && \
        log 'successfully restarted caddy' '✓' 32