#!/usr/bin/env bash
# Render the demo-map screenshots used for visual review into <repo>/Screenshots/demo/.
#
# Usage: Tools/render_screenshots.sh [--verify]
#
# Only the **demo map** is captured: the review staging map exists to hold the
# hero/camera list, not to produce review screenshots. Everything here is what a
# player actually sees when the demo runs.
#
#   --verify   run Tools/visual_loop.py --verify afterwards and fail if a shot
#              does not show the content its expectation describes
#
# The PNGs are committed (see Screenshots/README.md): a reviewer must see exactly
# what the build rendered.
set -euo pipefail

REPO="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
ENGINE="${UE_ENGINE_DIR:-/run/media/system/DATA/Engines/UE_5.8.4}"
PROJ="$REPO/Game/GigLine/GigLine.uproject"
VERIFY="no"
[ "${1:-}" = "--verify" ] && VERIFY="yes"

echo "== 1/3 stage the demo shot cameras =="
cd "$ENGINE"
./Engine/Binaries/Linux/UnrealEditor-Cmd "$PROJ" \
  -run=pythonscript -script="$REPO/Tools/ue_build_review_map.py" \
  -nullrhi -unattended -nopause -stdout
tail -3 /tmp/ue-review-map-result.txt 2>/dev/null || true

echo "== 2/3 capture the demo map =="
./Engine/Binaries/Linux/UnrealEditor-Cmd "$PROJ" /Game/Hollywood/DemoMap \
  -game -windowed -ResX=1920 -ResY=1080 -nopause -nosplash -stdout

echo "== 3/3 collect the demo screenshots =="
mkdir -p "$REPO/Screenshots/demo"
rm -f "$REPO"/Screenshots/demo/review-*.png
found=0
for src in \
  "$REPO/Game/GigLine/Saved/Screenshots"/*/review-*.png \
  "$REPO/Game/GigLine/Saved/Screenshots"/*/*/review-*.png \
  "$HOME/.config/Epic/GigLine/Saved/Screenshots"/*/review-*.png; do
  [ -e "$src" ] || continue
  case "$(basename "$src")" in
    *demo-*) cp -f "$src" "$REPO/Screenshots/demo/"; found=1 ;;
  esac
done
[ "$found" = "1" ] || { echo "ERROR: no demo screenshots found"; exit 1; }
ls -1 "$REPO/Screenshots/demo"

if [ "$VERIFY" = "yes" ]; then
  echo "== verify: does each shot show what it should? =="
  cd "$REPO"
  python3 Tools/visual_loop.py --verify
fi