#!/usr/bin/env bash
#
# migrate-backlog-statuses.sh <repo-path> [--dry-run]
#
# Migrate a Backlog.md repo to the unified status vocabulary:
#   🟦 Backlog · 🟢 In progress · 🚧 Paused · 🏁 Done
#
# Updates backlog/config.yml (statuses + default_status) and rewrites each task's
# status via the backlog CLI using the mapping below. Idempotent: tasks already
# on the new vocab are left alone.
#
# This is the pilot rollout helper — run it per repo for the later full rollout.
# Claude project docs (Humdrum/Claude/Projects/*.md) are migrated separately:
#   - frontmatter `status:` → one of the four (judgement: 🟡→🟢, 🔴→🚧, etc.)
#   - any ```base``` filters referencing "Done" → "🏁 Done"
#
set -euo pipefail

repo="${1:?usage: migrate-backlog-statuses.sh <repo-path> [--dry-run]}"
dry=""; [ "${2:-}" = "--dry-run" ] && dry=1
cd "$repo"
[ -f backlog/config.yml ] || { echo "no backlog/config.yml in $repo — skipping"; exit 0; }

NEW_STATUSES='["🟦 Backlog", "🟢 In progress", "🚧 Paused", "🏁 Done"]'

map_status() {
  case "$1" in
    "To Do"|"Todo"|"Backlog")              echo "🟦 Backlog" ;;
    "In Progress"|"In progress"|"Doing")   echo "🟢 In progress" ;;
    "Paused"|"Blocked"|"On Hold"|"Hold")   echo "🚧 Paused" ;;
    "Done"|"Shipped"|"Complete"|"Completed") echo "🏁 Done" ;;
    *) echo "" ;;  # already new vocab, or unknown — leave it
  esac
}

echo "== $repo =="

# config: statuses array (CLI refuses arrays, so edit the file) + default_status
if [ -z "$dry" ]; then
  tmp=$(mktemp)
  awk -v repl="statuses: $NEW_STATUSES" '/^statuses:/{print repl; next} {print}' backlog/config.yml > "$tmp" && mv "$tmp" backlog/config.yml
  backlog config set defaultStatus "🟦 Backlog" >/dev/null 2>&1 || true
fi
echo "  config: statuses + default_status → new vocab"

# tasks: map current status → new
shopt -s nullglob
for f in backlog/tasks/*.md; do
  id=$(awk -F': ' '/^id:/{print $2; exit}' "$f")
  cur=$(awk '/^status:/{sub(/^status:[ ]*/,""); gsub(/^["'\'']|["'\'']$/,""); print; exit}' "$f")
  new=$(map_status "$cur")
  [ -z "$new" ] && continue
  [ "$new" = "$cur" ] && continue
  echo "  $id: $cur → $new"
  [ -z "$dry" ] && backlog task edit "$id" -s "$new" --plain >/dev/null 2>&1
done

echo "  done"