#!/usr/bin/env bash
# =============================================================================
# pending-raw.sh — deterministic "what needs ingesting" calculator.
# Reads the clean base checkout and classifies each raw/articles/*.md as:
#   new       -> no wiki/sources/<slug>.md
#   modified  -> page exists but its source_sha256 != current file hash
# Emits the same JSON envelope as changed-raw (drop-in), plus detail[] for ntfy.
# =============================================================================
set -euo pipefail

genome="${1:?usage: pending-raw.sh <genome>}"
base_dir="${GENOMES_ROOT:-${HOME}/genomes}"
cd "${base_dir}/${genome}" 2>/dev/null || { echo '{"status":"error","reason":"unknown genome"}'; exit 1; }

# Clean start on the configured base (Step 3 will extract this to lib/clean-start.sh).
git fetch -q origin \
  && git switch -q "${INGEST_BASE:-main}" 2>/dev/null \
  && git reset -q --hard "origin/${INGEST_BASE:-main}" \
  && git clean -q -fd

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
SLUG="${SCRIPT_DIR}/slug.sh"

declare -a NEW=()
declare -a MOD=()
declare -A SEEN_SLUG=()

if [[ -d raw/articles ]]; then
  while IFS= read -r -d '' f; do
    rel="${f#./}"
    case "$rel" in
      */.stfolder/*|*/.stignore|*/.gitkeep) continue ;;
    esac
    slug="$("$SLUG" --raw "$rel")" || continue

    # Residual collision (two distinct raws -> same slug): warn, do not silence.
    if [[ -n "${SEEN_SLUG[$slug]:-}" && "${SEEN_SLUG[$slug]}" != "$rel" ]]; then
      logger -t pending-raw "warn: slug collision ${slug}: ${SEEN_SLUG[$slug]} <-> ${rel}"
    fi
    SEEN_SLUG[$slug]="$rel"

    page="wiki/sources/${slug}.md"
    if [[ ! -f "$page" ]]; then
      NEW+=("$rel")
    else
      cur="$(sha256sum "$rel" | cut -d' ' -f1)"
      rec="$(sed -n 's/^source_sha256:[[:space:]]*//p' "$page" | tr -d '\r' | head -n1)"
      if [[ "$cur" != "$rec" ]]; then
        MOD+=("$rel")
      fi
    fi
  done < <(find raw/articles -type f -name '*.md' -print0 2>/dev/null)
fi

if [[ ${#NEW[@]} -eq 0 && ${#MOD[@]} -eq 0 ]]; then
  echo '{"status":"ok","genome":"'"$genome"'","count":0,"files":[],"detail":[]}'
else
  {
    for x in "${NEW[@]}"; do printf '%s\tnew\n' "$x"; done
    for x in "${MOD[@]}"; do printf '%s\tmodified\n' "$x"; done
  } | jq -R 'split("\t") | {path: .[0], reason: .[1]}' \
    | jq -s --arg g "$genome" \
        '{status: "ok", genome: $g, count: length, files: [.[].path], detail: .}'
fi