[Unit]
Description=Home Assistant - Bootstrap /config from the operator-provided templates
Documentation=https://www.home-assistant.io/docs/configuration/
After=var-lib-virtiofs-data.mount
Requires=var-lib-virtiofs-data.mount

# Only run if the operator provided a bootstrap configuration
ConditionPathExists=/etc/quadlets/home-assistant/configuration.yaml

# Start/stop this unit when the target is started/stopped, before the service
PartOf=home-assistant.target
Before=home-assistant.service

[Service]
Type=oneshot
RemainAfterExit=yes

# Bootstrap /config ONLY where a file is absent. Home Assistant owns /config once
# it has started: after first boot the live copies win and nothing here is touched
# again. install_if_absent copies the operator's bootstrap files; stub_if_absent
# creates the empty include targets configuration.yaml references
# (automations.yaml / scenes.yaml / scripts.yaml) so Home Assistant does not fall
# back to recovery mode on an otherwise-empty /config.
ExecStart=/bin/sh -c '\
    set -eu; \
    src=/etc/quadlets/home-assistant; \
    dst=/var/lib/virtiofs/data/home-assistant; \
    install_if_absent() { \
        if [ -f "$src/$1" ] && [ ! -e "$dst/$1" ]; then \
            echo "Bootstrapping $dst/$1 from $src/$1"; \
            install -m "$2" -o 10034 -g 10000 "$src/$1" "$dst/$1"; \
        else \
            echo "Keeping existing $dst/$1 (Home Assistant owns it) or no bootstrap provided"; \
        fi; \
    }; \
    stub_if_absent() { \
        if [ ! -e "$dst/$1" ]; then \
            echo "Creating empty $dst/$1"; \
            echo "$2" > "$dst/$1"; \
            chown 10034:10000 "$dst/$1"; \
        fi; \
    }; \
    install_if_absent configuration.yaml 0644; \
    install_if_absent secrets.yaml 0600; \
    stub_if_absent automations.yaml "[]"; \
    stub_if_absent scenes.yaml "[]"; \
    stub_if_absent scripts.yaml "{}"'

[Install]
WantedBy=home-assistant.target