#!/usr/bin/bash
#
# Launch a HyprCosmic session: cosmic-comp for window management, HyDE's shell
# on top.
#
# Deliberately separate from /usr/bin/start-cosmic rather than patching it.
# The stock COSMIC session entry keeps working untouched, so a broken
# HyprCosmic config is always one logout away from being escaped — which
# matters when the thing you are replacing is your desktop.

set -e

# Default to the installed binaries. Override either one to point at an
# in-tree debug build when testing the fork without installing it.
HYPRCOSMIC_SESSION_BIN="${HYPRCOSMIC_SESSION_BIN:-/usr/bin/cosmic-session}"
HYPRCOSMIC_COMP_BIN="${HYPRCOSMIC_COMP_BIN:-cosmic-comp}"

# Selects the component set in cosmic-session's profile module: cosmic-panel,
# cosmic-launcher, cosmic-app-library, cosmic-workspaces, cosmic-bg and
# cosmic-files-applet are skipped; waybar and friends come from
# ~/.config/hyprcosmic/autostart.
export HYPRCOSMIC_PROFILE=hyprcosmic

# Keep COSMIC's identity: portals, cosmic-settings and any COSMIC app still
# key off this, and the compositor underneath really is COSMIC.
export XDG_CURRENT_DESKTOP="${XDG_CURRENT_DESKTOP:-COSMIC}"
export XDG_SESSION_DESKTOP="${XDG_SESSION_DESKTOP:-hyprcosmic}"

# Same hygiene as start-cosmic: a failed unit left by a previous graphical
# session will otherwise block this one from starting.
if command -v systemctl >/dev/null; then
    for unit in $(systemctl --user --no-legend --state=failed --plain list-units | cut -f1 -d' '); do
        partof="$(systemctl --user show -p PartOf --value "$unit")"
        for target in cosmic-session.target graphical-session.target; do
            if [ "$partof" = "$target" ]; then
                systemctl --user reset-failed "$unit"
                break
            fi
        done
    done
fi

# cosmic-session takes the compositor to launch as its first argument
# (main.rs: `args.next().unwrap_or_else(|| String::from("cosmic-comp"))`),
# which is how a forked cosmic-comp gets used without replacing the system one.
if [[ -z "${DBUS_SESSION_BUS_ADDRESS}" ]]; then
    exec /usr/bin/dbus-run-session -- "${HYPRCOSMIC_SESSION_BIN}" "${HYPRCOSMIC_COMP_BIN}"
else
    exec "${HYPRCOSMIC_SESSION_BIN}" "${HYPRCOSMIC_COMP_BIN}"
fi