#!/usr/bin/env bash
set -euo pipefail

REPO="${PROJREPO:-$(cd "$(dirname "$0")/.." && pwd)}"
LOCK="$REPO/.projects.lock"
TS="$(date +%F_%H%M%S)"
cd "$REPO"

need() { command -v "$1" >/dev/null 2>&1 || { echo "ERROR: missing $1"; exit 1; }; }
need jq
need git
need python3
need flock

exec 9>"$LOCK"
flock -n 9 || { echo "ERROR: projectsctl is already running"; exit 2; }

backup() {
  mkdir -p "$REPO/backups"
  cp -a "$REPO/projects.json" "$REPO/backups/projects.json.$TS"
}

render() {
  ./tools/render_projects_index.py >/dev/null
}

git_sync() {
  git rev-parse --is-inside-work-tree >/dev/null
  git checkout main >/dev/null 2>&1 || true
  git pull --rebase --autostash >/dev/null 2>&1 || true
}

git_commit_push() {
  if git diff --quiet && git diff --cached --quiet; then
    echo "No changes to commit."
    exit 0
  fi
  git add projects.json PROJECTS_INDEX.md
  git commit -m "projects: update ($TS)" >/dev/null
  git push origin main >/dev/null
  echo "OK: committed and pushed to main."
}

cmd="${1:-}"; shift || true

case "$cmd" in
  add)
    name="${1:-}"; status="${2:-active}"; shift 2 || true
    repo="${1:-}"; local_path="${2:-}"; shift 2 || true
    notes="${*:-}"
    [[ -n "$name" ]] || { echo "usage: projectsctl add <name> [status] [repo] [local_path] [notes...]"; exit 1; }

    git_sync
    backup

    tmp="$(mktemp)"
    jq --arg name "$name" --arg status "$status" --arg repo "$repo" --arg lp "$local_path" --arg notes "$notes" '
      .projects |= ( . + [ {name:$name,status:$status,type:"",repo:$repo,local_path:$lp,notes:$notes} ] )
    ' projects.json > "$tmp"
    mv "$tmp" projects.json

    render
    git_commit_push
    ;;

  set-status)
    name="${1:-}"; status="${2:-}"
    [[ -n "$name" && -n "$status" ]] || { echo "usage: projectsctl set-status <name> <active|paused|archived>"; exit 1; }

    git_sync
    backup

    tmp="$(mktemp)"
    jq --arg name "$name" --arg status "$status" '
      .projects |= (map(if .name==$name then .status=$status else . end))
    ' projects.json > "$tmp"
    mv "$tmp" projects.json

    render
    git_commit_push
    ;;

  update-notes)
    name="${1:-}"; shift || true
    notes="${*:-}"
    [[ -n "$name" && -n "$notes" ]] || { echo "usage: projectsctl update-notes <name> <notes...>"; exit 1; }

    git_sync
    backup

    tmp="$(mktemp)"
    jq --arg name "$name" --arg notes "$notes" '
      .projects |= (map(if .name==$name then .notes=$notes else . end))
    ' projects.json > "$tmp"
    mv "$tmp" projects.json

    render
    git_commit_push
    ;;

  list)
    python3 - <<'PY'
import json
p=json.load(open("projects.json"))
for pr in p.get("projects",[]):
    print(f"{pr.get('status',''):8} {pr.get('name','')}")
PY
    ;;

  render)
    render
    echo "OK: rendered PROJECTS_INDEX.md"
    ;;

  *)
    echo "usage:"
    echo "  projectsctl add <name> [status] [repo] [local_path] [notes...]"
    echo "  projectsctl set-status <name> <active|paused|archived>"
    echo "  projectsctl update-notes <name> <notes...>"
    echo "  projectsctl list"
    echo "  projectsctl render"
    exit 1
    ;;
esac