#!/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"

run_cmdlet() {
  local script="$1" label="$2"
  echo "== $label =="
  ( cd "$ENGINE" && ./Engine/Binaries/Linux/UnrealEditor-Cmd "$PROJ" \
      -run=pythonscript -script="$REPO/Tools/$script" \
      -nullrhi -unattended -nopause -stdout )
}

# Order matters. The demo builder rebuilds the site materials, so any actor staged
# by another tool must be (re)staged after it or it keeps a reference to a material
# that no longer exists - that is how 604 actors ended up untextured once.
run_cmdlet ue_build_demo_map.py "1/5 rebuild the demo map (materials, site, frontage)"
run_cmdlet ue_apply_facade_kit.py "2/5 assemble the facade kit"
run_cmdlet ue_stage_theatre_trim.py "3/5 stage the theatre trim"
run_cmdlet ue_audit_scene.py "4/6 audit the scene (materials, placement, labels)"
run_cmdlet ue_build_review_map.py "5/6 stage the demo shot cameras"
tail -3 /tmp/ue-review-map-result.txt 2>/dev/null || true

echo "== 6/6 capture the demo map =="
# The engine path is absolute: this step runs from the repo, not from $ENGINE, and a
# bare ./Engine/... failed with "No such file or directory" while every commandlet
# above succeeded through run_cmdlet's cd.
"$ENGINE/Engine/Binaries/Linux/UnrealEditor-Cmd" "$PROJ" /Game/Hollywood/DemoMap \
  -game -windowed -ResX=1920 -ResY=1080 -nopause -nosplash -stdout

echo "== 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"

# The scene audit is a gate: a wrong-material or misplaced actor is exactly the
# kind of failure that still renders plausibly.
if grep -q "failure(s) ==" /tmp/gigline/scene-audit.txt 2>/dev/null; then
  grep -E "FAIL|failure\(s\)" /tmp/gigline/scene-audit.txt | tail -5
  grep -q "== 0 failure(s) ==" /tmp/gigline/scene-audit.txt || {
    echo "ERROR: scene audit failed — see /tmp/gigline/scene-audit.txt"; exit 1; }
fi

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