#!/usr/bin/env bash
# Render in-game screenshots for visual review into <repo>/Screenshots/ (gitignored).
#
# Usage: Tools/render_screenshots.sh
# Rebuilds /Game/Test/ReviewMap and /Game/Hollywood/DemoMap (shot lists), runs
# the game on each map (the GigLineShotActor walks the cameras, captures, quits),
# and copies the PNGs into Screenshots/. PNGs are never committed.
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"

echo "== 1/4 build review + demo shot maps =="
cd "$ENGINE"
./Engine/Binaries/Linux/UnrealEditor-Cmd "$PROJ" \
  -run=pythonscript -script="$REPO/Tools/ue_build_review_map.py" \
  -nullrhi -unattended -nopause -stdout
cat /tmp/ue-review-map-result.txt | tail -3

run_capture() {
  local map="$1" label="$2"
  echo "== capture: $label =="
  ./Engine/Binaries/Linux/UnrealEditor-Cmd "$PROJ" "$map" \
    -game -windowed -ResX=1920 -ResY=1080 -nopause -nosplash -stdout
}

echo "== 2/4 run game on review map (hero/scene shots) =="
run_capture "/Game/Test/ReviewMap" "review"

echo "== 3/4 run game on demo map (walkable-demo shots) =="
run_capture "/Game/Hollywood/DemoMap" "demo"

echo "== 4/4 collect screenshots =="
mkdir -p "$REPO/Screenshots/demo"
rm -f "$REPO"/Screenshots/review-*.png "$REPO"/Screenshots/demo/review-*.png
found=0
for src in \
  "$REPO/Game/GigLine/Saved/Screenshots"/*/review-*.png \
  "$REPO/Game/GigLine/Saved/Screenshots"/*/*/review-*.png \
  "$HOME/.config/Epic/GigLine/Saved/Screenshots"/*/review-*.png; do
  [ -e "$src" ] || continue
  name=$(basename "$src")
  if [[ "$name" == review-?("")-demo-* || "$name" == review-*-demo-* || "$name" == review-0?-demo-* ]] \
     || [[ "$name" == *demo-* ]]; then
    cp -f "$src" "$REPO/Screenshots/demo/$name"
  else
    cp -f "$src" "$REPO/Screenshots/$name"
  fi
  found=1
done
[ "$found" = "1" ] || { echo "ERROR: no review-*.png found"; exit 1; }
echo "--- Screenshots/ ---"
ls -1 "$REPO/Screenshots"
echo "--- Screenshots/demo/ ---"
ls -1 "$REPO/Screenshots/demo"