#!/bin/bash
set -euo pipefail
LOGFILE="$HOME/.local/logs/gamescope.log"

log() { echo "[$(date --iso-8601=seconds)] $*" | tee -a "$LOGFILE"; }

log "Starting Gamescope session..."
CONF_FILE="$HOME/.config/gamescope/gamescope.conf"
[ -f "$CONF_FILE" ] && source "$CONF_FILE"

OUTPUT_CONNECTOR=${OUTPUT_CONNECTOR:-HDMI-A-1}
FRAMERATE=${FRAMERATE:-60}
RESOLUTION=${RESOLUTION:-1920x1080}
WIDTH="${RESOLUTION%x*}"
HEIGHT="${RESOLUTION#*x}"

export __GL_GSYNC_ALLOWED=1
export __GL_VRR_ALLOWED=1
# export __GL_THREADED_OPTIMIZATIONS=1
export __GL_SHADER_DISK_CACHE=1
export __GL_SYNC_TO_VBLANK=0

GAMESCOPE_BIN="$(command -v gamescope || true)"
if [ -z "$GAMESCOPE_BIN" ]; then
  log "ERROR: gamescope not found in PATH"
  exit 127
fi

HDR_FLAG=""
if [[ "$HDR_ENABLED" == "1" || "$HDR_ENABLED" == "true" || "$HDR_ENABLED" == "yes" ]]; then
    HDR_FLAG="--hdr-enabled"
    log "HDR flag added: --hdr-enabled"
else
    log "HDR disabled, no HDR flag added"
fi

GAMESCOPE_ARGS="--generate-drm-mode fixed --fade-out-duration 200 --cursor-scale-height 720 -f -w $WIDTH -h $HEIGHT --rt --mangoapp -e -O \"$OUTPUT_CONNECTOR\" -r $FRAMERATE $HDR_FLAG"
log "Launching Gamescope: $GAMESCOPE_BIN $GAMESCOPE_ARGS -- /usr/local/bin/launch_steam.sh"
exec "$GAMESCOPE_BIN" ${GAMESCOPE_ARGS} -- /usr/local/bin/launch_steam.sh >>"$LOGFILE" 2>&1