#!/usr/bin/env bash
# Combines steps 1+2 (preprocess + OCR) adaptively: tries preprocess.py's
# variants cheapest-first (0=baseline, same as 1_preprocess_image.sh's
# default, up to 3=most elaborate), scoring each variant's OCR text with
# tooling-container/src/plausibility.py and stopping at the first one
# that looks receipt-consistent - no LLM call involved, so this costs
# nothing extra over the single-variant path for the receipts the
# baseline already reads correctly. See tooling-container/src/adaptive.py
# and testing/2026_10_04_gimp_highpass_nlfilter_experiment.md for why.
#
# Writes <out>/variant<N>/{01_gray,...,0X_final}.png and its own ocr.txt
# for every variant tried (for inspection - which variant was kept is in
# the printed summary) and <out>/ocr.txt (the winning variant's OCR
# text, ready for ./3_extract_data.sh).
#
# Usage: ./12_adaptive_preprocess_ocr.sh -in <photo> -out <scratch-dir>
set -euo pipefail

cd "$(dirname "${BASH_SOURCE[0]}")"
ROOT="$(pwd)"

fail() { echo "FAIL: $*" >&2; exit 1; }

IN_PATH=""
OUT_DIR=""
while [ $# -gt 0 ]; do
    case "$1" in
        -in) IN_PATH="${2:-}"; shift 2 ;;
        -out) OUT_DIR="${2:-}"; shift 2 ;;
        *) fail "unknown argument: $1" ;;
    esac
done
[ -n "$IN_PATH" ] && [ -n "$OUT_DIR" ] \
    || fail "usage: $0 -in <photo> -out <scratch-dir>"
[ -f "$IN_PATH" ] || fail "input file not found: $IN_PATH"

command -v docker >/dev/null 2>&1 || fail "docker not found in PATH"

IMAGE="${REGISTRY_IMAGE:-fuelish/tools}"
if [ -f "$ROOT/registry.env" ]; then
    # shellcheck disable=SC1091
    source "$ROOT/registry.env"
    IMAGE="${REGISTRY_IMAGE:-$IMAGE}"
fi
VERSION="$(<"$ROOT/tooling-container/VERSION")"
IMAGE="$IMAGE:$VERSION"
docker image inspect "$IMAGE" >/dev/null 2>&1 \
    || fail "$IMAGE not found locally - run ./build-image.sh first"

IN_ABS="$(realpath "$IN_PATH")"
IN_DIR="$(dirname "$IN_ABS")"
IN_FILE="$(basename "$IN_ABS")"
mkdir -p "$OUT_DIR"
OUT_ABS="$(realpath "$OUT_DIR")"

GROUP_ADD_ARGS=(--group-add "$(stat -c %g "$IN_DIR")")
OUT_GID="$(stat -c %g "$OUT_ABS")"
[ "$OUT_GID" = "$(stat -c %g "$IN_DIR")" ] || GROUP_ADD_ARGS+=(--group-add "$OUT_GID")

echo "== Adaptively preprocessing + OCRing $IN_FILE =="
docker run --rm \
    --user "$(id -u):$(id -g)" \
    "${GROUP_ADD_ARGS[@]}" \
    -v "$IN_DIR:/data/in:ro" \
    -v "$OUT_ABS:/data/out" \
    "$IMAGE" \
    python3 /opt/app/src/adaptive.py -in "/data/in/$IN_FILE" -out /data/out

echo "== Done =="
echo "Next: ./3_extract_data.sh -in $OUT_ABS/ocr.txt -out $OUT_ABS"