#!/usr/bin/env bash

__paqad_read_key() {
  local file="$1" key="$2"
  [ -f "${file}" ] || return 0
  grep -E "^[[:space:]]*(export[[:space:]]+)?${key}[[:space:]]*=" "${file}" 2>/dev/null \
    | tail -n1 \
    | sed -E 's/^[^=]*=//; s/[[:space:]]#.*$//; s/^[[:space:]]*//; s/[[:space:]]*$//; s/^"(.*)"$/\1/; s/^'"'"'(.*)'"'"'$/\1/' \
    | tr '[:upper:]' '[:lower:]'
}

__paqad_read_yaml_enabled() {
  local file="$1"
  [ -f "${file}" ] || return 0
  tr -d '\r' <"${file}" 2>/dev/null \
    | grep -E '^enabled:([[:space:]]|$)' 2>/dev/null \
    | head -n1 \
    | sed -E 's/^enabled://; s/^/ /; s/[[:space:]]#.*$//; s/^[[:space:]]*//; s/[[:space:]]*$//; s/^"(.*)"$/\1/; s/^'"'"'(.*)'"'"'$/\1/' \
    | tr '[:upper:]' '[:lower:]' || true
}

__paqad_log_unreadable_enabled() {
  local root="$1" value="$2" dir
  dir="${root}/.paqad/logs"
  mkdir -p "${dir}" 2>/dev/null || return 0
  printf '%s .paqad/configs/paqad.yaml: enabled has a value paqad cannot read (%s), so paqad stays on.\n' \
    "$(date -u +%Y-%m-%dT%H:%M:%SZ)" "${value}" >>"${dir}/hooks.log" 2>/dev/null || true
}

__paqad_is_migrated_stub() {
  local first
  first=$(head -n1 "$1" 2>/dev/null | tr -d '\r' | sed -E 's/^[[:space:]]*//; s/[[:space:]]*$//')
  [ "${first}" = '# paqad-migrated-stub' ]
}

__paqad_today() {
  date -u +%Y-%m-%d
}

__paqad_legacy_readable() {
  local today
  today=$(__paqad_today | tr -d '-')
  [ -n "${today}" ] || return 0
  [ "${today}" -le 20270201 ]
}

__paqad_resolve_enable() {
  local root="$1" value="" v dir f team=""
  dir="${root}/.paqad/configs"
  team=$(__paqad_read_yaml_enabled "${dir}/paqad.yaml")
  if [ -d "${dir}" ] && [ -z "${team}" ] && __paqad_legacy_readable; then
    while IFS= read -r f; do
      [ -e "${f}" ] || continue
      __paqad_is_migrated_stub "${f}" && continue
      v=$(__paqad_read_key "${f}" 'paqad_enable')
      [ -n "${v}" ] && value="${v}"
    done < <(LC_ALL=C find "${dir}" -maxdepth 1 -name '.config.*' ! -name '.config.example' -type f 2>/dev/null | LC_ALL=C sort)
  fi
  if [ -n "${team}" ]; then
    case "${team}" in
      true | false | 1 | 0 | yes | no | on | off) value="${team}" ;;
      *) __paqad_log_unreadable_enabled "${root}" "${team}" ;;
    esac
  fi
  v=$(__paqad_read_key "${root}/.paqad/.config" 'paqad_enable')
  [ -n "${v}" ] && value="${v}"
  v=$(printf '%s' "${PAQAD_ENABLE:-}" | tr '[:upper:]' '[:lower:]' | sed -E 's/^[[:space:]]*//; s/[[:space:]]*$//')
  [ -n "${v}" ] && value="${v}"
  printf '%s' "${value}"
}

__paqad_resolve_project_root() {
  local cwd="${1:-}" dir parent
  if [ -n "${cwd}" ]; then
    dir="${cwd}"
    while :; do
      if [ -d "${dir}/.paqad" ]; then
        printf '%s' "${dir}"
        return 0
      fi
      parent="$(dirname "${dir}")"
      [ "${parent}" = "${dir}" ] && break
      dir="${parent}"
    done
  fi
  printf '%s' "${CLAUDE_PROJECT_DIR:-${PAQAD_PROJECT_ROOT:-$(pwd)}}"
}

paqad_is_disabled() {
  case "$(printf '%s' "${PAQAD_DISABLED:-}" | tr '[:upper:]' '[:lower:]')" in
    1 | true | yes | on)
      return 0
      ;;
  esac

  local root resolved
  root="$(__paqad_resolve_project_root "${1:-}")"
  resolved=$(__paqad_resolve_enable "${root}")
  case "${resolved}" in
    false | 0 | no | off)
      return 0
      ;;
  esac

  return 1
}