#!/usr/bin/env bash
set -euo pipefail
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
SKILL_ROOT="$(dirname "$SCRIPT_DIR")"
source "$SCRIPT_DIR/_common.sh"

: "${INPUT_DIR:=}"
: "${INPUT_FILES:=}"
: "${EXCLUDES:=.git,node_modules,target,dist,outputs}"
: "${LABEL:=snapshot}"
: "${NODE_NAME:=node-a}"
: "${OUTPUT_DIR:=$SKILL_ROOT/outputs}"

build_file_list() {
  local out="$1"
  local find_args=()
  IFS=',' read -r -a ex <<< "$EXCLUDES"
  for pat in "${ex[@]}"; do [[ -n "$pat" ]] && find_args+=( -not -path "*/$pat/*" ); done

  if [[ -n "$INPUT_FILES" ]]; then
    : > "$out"
    IFS=',' read -r -a files <<< "$INPUT_FILES"
    for f in "${files[@]}"; do
      f="${f#"${f%%[![:space:]]*}"}"; f="${f%"${f##*[![:space:]]}"}"
      [[ -f "$f" ]] || die "Not a file: $f"
      echo "$f" >> "$out"
    done
  else
    (cd "$INPUT_DIR" && find . -type f "${find_args[@]}" | sed 's|^\./||') > "$out.rel"
    awk -v root="$INPUT_DIR" '{print root "/" $0}' "$out.rel" > "$out"
    rm -f "$out.rel"
  fi
  sort -u "$out" -o "$out"
}

main() {
  local tmp; tmp="$(mktemp)"
  build_file_list "$tmp"
  local count; count="$(wc -l < "$tmp" | tr -d ' ')"
  echo "[PLAN] $(date -Iseconds) Merkle Forest"
  echo "[PLAN] Node: $NODE_NAME  Label: $LABEL"
  echo "[PLAN] Hasher: $(pick_hasher)"
  echo "[PLAN] Files: $count"
  echo "[PLAN] Output: $OUTPUT_DIR"
  echo "[PLAN] Next: export DRY_RUN=0 && ./scripts/11_apply.sh"
  rm -f "$tmp"
}
main "$@"