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

# SPDX-License-Identifier: PolyForm-Noncommercial-1.0.0

# secrets — encrypted env file sync between machines
# Uses age key-file encryption + a private git repo.

# F5: explicit HOME check. `set -u` would already error if HOME were unset,
# but the message would be cryptic ("HOME: unbound variable" pointing at
# the SECRETS_DIR default-init line). Check up front with a directed message
# so cron/sudo/CI users know what to fix.
: "${HOME:?HOME is not set; secrets needs a home directory to find or create the store}"

# Capture the user-provided SECRETS_DIR (if any) before defaulting.
# resolve_store() uses this to honor SECRETS_DIR as the legacy escape hatch
# while letting .secrets-store files take precedence per project.
_USER_SECRETS_DIR="${SECRETS_DIR:-}"
SECRETS_DIR="${SECRETS_DIR:-$HOME/.secrets}"
KEY_FILE="$SECRETS_DIR/key.txt"
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

# Set by resolve_store(). Reports which rule chose SECRETS_DIR.
STORE_SOURCE="default"
# Path to the .secrets-store file that won resolution, if any.
_LAST_FOUND_AT=""
# Remote URL parsed from the active .secrets-store file (optional 2nd token).
# Used by check_initialized to fill in a runnable `git clone <URL> <PATH>`
# in the missing-store error so teammates don't have to ask.
_REMOTE_URL=""
# --store flag value, captured by the pre-pass.
STORE_OVERRIDE=""

# ─── Helpers ───────────────────────────────────────────────────────────

die() { echo "ERROR: $*" >&2; exit 1; }
info() { echo "==> $*"; }

check_cmd() {
  command -v "$1" >/dev/null 2>&1 || die "'$1' is not installed. Run: brew install $1"
}

check_initialized() {
  if [ -d "$SECRETS_DIR/.git" ]; then
    return
  fi
  if [ "$STORE_SOURCE" != "default" ]; then
    # Fill in the remote URL when .secrets-store provided one, so the
    # teammate can copy-paste the clone command without asking the original
    # setter for the URL. Falls back to a placeholder otherwise.
    local clone_url
    if [ -n "${_REMOTE_URL:-}" ]; then
      clone_url="$_REMOTE_URL"
    else
      clone_url="<their-store-remote>"
    fi
    die "Store not initialized: $SECRETS_DIR
  Resolved from: $STORE_SOURCE
  This path doesn't exist on this machine yet.

  If you're joining a teammate's existing store:
    git clone $clone_url $SECRETS_DIR
    # then copy their key.txt to $SECRETS_DIR/key.txt

  If you want a fresh new store at this path:
    secrets --store $SECRETS_DIR init"
  fi
  die "Not initialized. Run: secrets init"
}

check_key() {
  if [ -f "$KEY_FILE" ]; then
    return
  fi
  if [ "$STORE_SOURCE" != "default" ]; then
    die "Key file not found at $KEY_FILE
  The store at $SECRETS_DIR exists but has no key.txt.
  Resolved from: $STORE_SOURCE

  If joining a teammate's store: copy their key.txt to $KEY_FILE.
  If this is your own new store: re-run init for this store path."
  fi
  die "Key file not found at $KEY_FILE. Run: secrets init"
}

get_pubkey() {
  age-keygen -y "$KEY_FILE" 2>/dev/null || die "Failed to derive public key from $KEY_FILE"
}

derive_project_name() {
  local explicit="${1:-}"
  if [ -n "$explicit" ]; then
    echo "$explicit"
    return
  fi
  # Try git remote basename
  local remote
  remote=$(git config --get remote.origin.url 2>/dev/null || true)
  if [ -n "$remote" ]; then
    basename "$remote" .git
    return
  fi
  # Fall back to current directory name
  basename "$PWD"
}

# ─── Store resolution ──────────────────────────────────────────────────
#
# Resolution order (highest precedence first):
#   1. --store <dir>  flag (captured by main pre-pass into STORE_OVERRIDE)
#   2. .secrets-store file in cwd or any ancestor up to but NOT including $HOME
#   3. SECRETS_DIR    env var (legacy escape hatch)
#   4. $HOME/.secrets default
#
# .secrets-store file format: first non-empty non-comment line is the store
# spec, optionally followed by a remote URL on the same line. Spec is one of:
#   - absolute path (/Users/you/.secrets-work)
#   - ~/path        (expanded to $HOME/path)
#   - bare name     (e.g. "work" → $HOME/.secrets-work; "default" → $HOME/.secrets)
#
# The optional second token (whitespace-separated) is a git remote URL. It
# is only used as a hint when the store directory does not yet exist on
# the current machine — the missing-store error includes a runnable
# `git clone <url> <path>` for the teammate to copy. Examples:
#
#   work
#   work git@github.com:acme/work-secrets.git
#   ~/.secrets-work https://github.com/acme/work-secrets.git
#
# Comments (#) and CRLF line endings are tolerated. NO shell expansion is
# applied to the file content — `$VAR`, `$(...)`, and backticks are read as
# literal characters to prevent code injection from a committed file.

# Take a store spec (path or bare name) and return an absolute directory.
_expand_store_path() {
  local path="$1"
  case "$path" in
    /*)
      echo "$path"
      ;;
    '~')
      echo "$HOME"
      ;;
    '~/'*)
      echo "$HOME/${path#\~/}"
      ;;
    .*|*/*)
      # Relative path or path containing /. Treat as path relative to cwd.
      echo "$path"
      ;;
    default)
      # Sugar: --store default → the canonical default store
      echo "$HOME/.secrets"
      ;;
    *)
      # Bare name like "work" → $HOME/.secrets-work
      echo "$HOME/.secrets-$path"
      ;;
  esac
}

# Read a .secrets-store file. On success, print "<store-spec>\t<remote-url>"
# (URL empty if not provided or rejected as unsafe). The first non-empty
# non-comment line is the active line; the first whitespace splits it into
# the spec and an optional URL.
#
# Security: the URL is later substituted into a copy-paste-ready `git clone`
# command in the missing-store error. An attacker who slips a malicious line
# into a committed .secrets-store could weaponize that copy-paste — e.g.
# `work evil.git;rm -rf ~` would render as `git clone evil.git;rm -rf ~ ...`
# and a teammate following the directed error would execute the payload.
# We reject URLs containing shell metacharacters, control characters, ANSI
# escapes, and embedded whitespace. Rejected URLs are dropped silently from
# the parser's perspective (a warning is printed to stderr); the resolver
# falls back to the `<their-store-remote>` placeholder so the directed
# error stays useful without rendering the attacker-controlled string.
_parse_secrets_store_file() {
  local file="$1"
  local line
  while IFS= read -r line || [ -n "$line" ]; do
    # Strip CRLF
    line="${line%$'\r'}"
    # Trim leading whitespace
    line="${line#"${line%%[![:space:]]*}"}"
    # Trim trailing whitespace
    line="${line%"${line##*[![:space:]]}"}"
    [ -z "$line" ] && continue
    case "$line" in '#'*) continue ;; esac
    # Split into spec (first whitespace-separated token) and url (rest of
    # the line, verbatim). `read -r` does NOT glob-expand and preserves the
    # tail in $rest as a single string — important so `work *` doesn't
    # silently expand to `work file1 file2 ...`.
    local spec="" rest=""
    read -r spec rest <<< "$line"
    local url="$rest"
    if [ -n "$url" ]; then
      # Reject URLs containing characters that could weaponize a
      # copy-paste shell command, terminal escapes, or be ambiguous.
      # Match order: control chars (incl. ESC \x1b), shell meta, whitespace.
      case "$url" in
        *[[:cntrl:]]*|*[\;\&\|\<\>\$\`\(\)\{\}\*\?\!\"\'\\]*|*' '*|*"	"*)
          echo "WARNING: $file: dropping unsafe characters in remote URL hint" >&2
          url=""
          ;;
      esac
    fi
    printf '%s\t%s\n' "$spec" "$url"
    return 0
  done < "$file"
  return 1
}

# Walk up from cwd looking for .secrets-store. Bounded by $HOME — never
# walks INTO or PAST $HOME. If cwd is outside $HOME entirely (e.g. /tmp),
# the walk does not run. Symlinks are resolved with `cd -P`.
# On success: prints "<expanded-store-dir>\t<source-file-path>\t<remote-url>"
# (URL empty if .secrets-store didn't include one) and returns 0. The caller
# (resolve_store) splits the tab-separated 3-tuple. We can't set a
# parent-shell variable from here because we're typically called inside
# `$(...)` command substitution, which runs in a subshell.
_find_secrets_store_file() {
  local dir
  dir=$(pwd -P 2>/dev/null) || dir="$PWD"
  local home_resolved
  home_resolved=$(cd -P "$HOME" 2>/dev/null && pwd -P) || home_resolved="$HOME"

  while [ -n "$dir" ] && [ "$dir" != "/" ] && [ "$dir" != "$home_resolved" ]; do
    # Bound: only walk while we're strictly below $HOME.
    case "$dir" in
      "$home_resolved"/*) ;;
      *) return 1 ;;
    esac

    # F2: never follow a symlinked .secrets-store. A committed symlink
    # could point at any user-readable file (~/.aws/credentials, /etc/passwd)
    # and trick the resolver into reading attacker-chosen content.
    if [ -L "$dir/.secrets-store" ]; then
      :
    elif [ -f "$dir/.secrets-store" ]; then
      local parsed
      if parsed=$(_parse_secrets_store_file "$dir/.secrets-store"); then
        # parsed is "<spec>\t<url>" (URL may be empty)
        local spec="${parsed%%$'\t'*}"
        local url="${parsed#*$'\t'}"
        local expanded
        expanded=$(_expand_store_path "$spec")
        printf '%s\t%s\t%s\n' "$expanded" "$dir/.secrets-store" "$url"
        return 0
      fi
    fi
    dir=$(dirname "$dir")
  done
  return 1
}

# Resolve the active store directory and update SECRETS_DIR + KEY_FILE.
# Sets STORE_SOURCE to one of:
#   "--store flag" | ".secrets-store file (<path>)" | "SECRETS_DIR env var" | "default"
# Also sets _REMOTE_URL to the optional remote URL parsed from .secrets-store
# (empty when not present). check_initialized uses _REMOTE_URL to fill in a
# copy-paste-ready `git clone` command for teammates whose store doesn't
# exist yet.
resolve_store() {
  local resolved=""
  local source=""
  _REMOTE_URL=""

  if [ -n "${STORE_OVERRIDE:-}" ]; then
    resolved=$(_expand_store_path "$STORE_OVERRIDE")
    source="--store flag"
    _LAST_FOUND_AT=""
  elif _find_result=$(_find_secrets_store_file); then
    # _find_secrets_store_file returns "<dir>\t<source-file-path>\t<url>"
    # IFS=$'\t' prefix is scoped to this single `read` builtin — no manual
    # save/restore needed. URL field is empty when .secrets-store didn't
    # include a URL or when it was rejected as unsafe.
    IFS=$'\t' read -r resolved _LAST_FOUND_AT _REMOTE_URL <<< "$_find_result"
    source=".secrets-store file ($_LAST_FOUND_AT)"
  elif [ -n "${_USER_SECRETS_DIR:-}" ]; then
    resolved="$_USER_SECRETS_DIR"
    source="SECRETS_DIR env var"
    _LAST_FOUND_AT=""
  else
    resolved="$HOME/.secrets"
    source="default"
    _LAST_FOUND_AT=""
  fi

  SECRETS_DIR="$resolved"
  KEY_FILE="$SECRETS_DIR/key.txt"
  STORE_SOURCE="$source"
}

# Echo "==> Store: ..." when SECRETS_DIR is not the canonical default.
# Called from cmd_push/cmd_pull (and their workspace variants) after resolution.
echo_store_if_non_default() {
  if [ "$SECRETS_DIR" != "$HOME/.secrets" ]; then
    info "Store: $SECRETS_DIR (from $STORE_SOURCE)"
  fi
}

# ─── End store resolution ──────────────────────────────────────────────

# Collect secret files from a directory:
#   .env, .env.*, .dev.vars (excluding .envrc, .environment-*)
# Sets the COLLECTED_FILES array. Returns 1 if no files found.
collect_env_files() {
  local dir="$1"
  COLLECTED_FILES=()
  for f in "$dir"/.env "$dir"/.env.* "$dir"/.dev.vars; do
    [ -f "$f" ] || continue
    local basename_f
    basename_f=$(basename "$f")
    case "$basename_f" in
      .envrc|.environment*) continue ;;
    esac
    COLLECTED_FILES+=("$f")
  done
  [ ${#COLLECTED_FILES[@]} -gt 0 ]
}

# ─── External files (.secrets-files) — EGB-531 ─────────────────────────
#
# A committed, project-local `.secrets-files` manifest declares files that
# live OUTSIDE the project root (e.g. global Gradle properties) whose
# *designated keys* should sync. One entry per non-empty non-comment line:
#
#     gradle-properties  ~/.gradle/gradle.properties  beaconClerkPkTest beaconClerkPkLive
#     <type>             <path>                        <key> [key...]
#
# push extracts only the named keys → encrypts a subset blob under
# <project>/external/. pull decrypts it and MERGES those keys into <path>,
# preserving every unrelated line. Only type `gradle-properties` is
# supported (the type token leaves room for future types without a plugin
# framework). Parsing mirrors `.secrets-store`: no shell expansion, no
# symlink following, conservative sanitization. The merge is pure bash
# (no sed/regex) with exact-string key matching, so it is safe against
# values containing `& \ /` and against substring keys
# (beaconClerkPk vs beaconClerkPkTest).

SECRETS_FILES_NAME=".secrets-files"
SUPPORTED_EXTERNAL_TYPE="gradle-properties"

# True if the string ends in an odd number of backslashes (a Java/Gradle
# properties line-continuation). Used to skip continuation lines when
# matching keys so an unrelated continued value is never clobbered.
_trailing_bs_odd() {
  local s="$1" n=0
  while [ "${s%\\}" != "$s" ]; do s="${s%\\}"; n=$((n + 1)); done
  [ $((n % 2)) -eq 1 ]
}

# Parse .secrets-files. Emits "<type>\t<path>\t<keys>" per valid entry on
# stdout; warnings (skipped/unsafe lines) to stderr. Conservative: rejects
# shell/control chars and `..` in the path, restricts keys to a safe
# charset. No shell expansion is applied to file content.
_parse_secrets_files_manifest() {
  local file="$1"
  local line lineno=0 mtype mpath mkeys
  while IFS= read -r line || [ -n "$line" ]; do
    lineno=$((lineno + 1))
    line="${line%$'\r'}"
    line="${line#"${line%%[![:space:]]*}"}"
    line="${line%"${line##*[![:space:]]}"}"
    [ -z "$line" ] && continue
    case "$line" in '#'*) continue ;; esac
    # `read -r` does not glob-expand and keeps the key list intact in $mkeys.
    read -r mtype mpath mkeys <<< "$line"
    if [ "$mtype" != "$SUPPORTED_EXTERNAL_TYPE" ]; then
      echo "WARNING: $file line $lineno: unknown type '$mtype' (supported: $SUPPORTED_EXTERNAL_TYPE). Skipping." >&2
      continue
    fi
    if [ -z "$mpath" ] || [ -z "$mkeys" ]; then
      echo "WARNING: $file line $lineno: expected '<type> <path> <key> [key...]'. Skipping." >&2
      continue
    fi
    # Path: allow alnum and / . _ ~ - only; reject everything else (blocks
    # \$ \` ; & | ( ) * ? whitespace etc.) and reject `..` traversal.
    case "$mpath" in
      *[!A-Za-z0-9/._~-]* | *..*)
        echo "WARNING: $file line $lineno: unsafe characters in path. Paths may contain letters, digits, / . _ - ~ only. Skipping." >&2
        continue
        ;;
    esac
    # Keys: space-separated; each may contain alnum and . _ - (covers the
    # systemProp. prefix). Reject anything else (=, *, control chars, ...).
    case "$mkeys" in
      *[!A-Za-z0-9._\ -]*)
        echo "WARNING: $file line $lineno: unsafe characters in key list. Skipping." >&2
        continue
        ;;
    esac
    printf '%s\t%s\t%s\n' "$mtype" "$mpath" "$mkeys"
  done < "$file"
}

# Validate a writable external target path. Refuses anything that isn't a
# `gradle.properties` resolving inside $HOME, blocks `..`, and refuses
# symlinks (target file or its parent dir) — the path comes from a
# committed file, so it is attacker-controllable. Returns 0 if safe.
_validate_external_target_path() {
  local p="$1"
  local base; base=$(basename "$p")
  if [ "$base" != "gradle.properties" ]; then
    echo "ERROR: $SECRETS_FILES_NAME: target basename must be 'gradle.properties' (got '$base'). Refusing." >&2
    return 1
  fi
  case "$p" in *..*) echo "ERROR: $SECRETS_FILES_NAME: target path may not contain '..'. Refusing." >&2; return 1 ;; esac
  local home_real; home_real=$(cd -P "$HOME" 2>/dev/null && pwd -P) || home_real="$HOME"
  local dir; dir=$(dirname "$p")
  # Resolve the deepest existing ancestor and require it inside $HOME.
  local probe="$dir"
  while [ ! -e "$probe" ] && [ "$probe" != "/" ] && [ -n "$probe" ]; do
    probe=$(dirname "$probe")
  done
  local probe_real
  probe_real=$(cd -P "$probe" 2>/dev/null && pwd -P) || {
    echo "ERROR: $SECRETS_FILES_NAME: cannot resolve target ancestor '$probe'. Refusing." >&2
    return 1
  }
  case "$probe_real/" in
    "$home_real"/*) ;;
    *) echo "ERROR: $SECRETS_FILES_NAME: target '$p' must resolve inside \$HOME. Refusing." >&2; return 1 ;;
  esac
  if [ -L "$p" ]; then
    echo "ERROR: $SECRETS_FILES_NAME: target '$p' is a symlink. Refusing to follow." >&2
    return 1
  fi
  if [ -e "$dir" ] && [ -L "$dir" ]; then
    echo "ERROR: $SECRETS_FILES_NAME: target dir '$dir' is a symlink. Refusing." >&2
    return 1
  fi
  return 0
}

# Print the value of an exact key from a properties file (last definition
# wins, matching Gradle). Returns 1 if the key is absent. Pure bash; the
# key is compared by string equality (never as a regex), and the value is
# read verbatim. Skips comments and continuation lines.
_props_get() {
  local file="$1" want="$2"
  [ -f "$file" ] || return 1
  local line t key after val="" found=0 cont=0
  while IFS= read -r line || [ -n "$line" ]; do
    line="${line%$'\r'}"
    if [ "$cont" -eq 1 ]; then
      _trailing_bs_odd "$line" && cont=1 || cont=0
      continue
    fi
    _trailing_bs_odd "$line" && cont=1 || cont=0
    t="${line#"${line%%[![:space:]]*}"}"
    case "$t" in ''|'#'*|'!'*) continue ;; esac
    key="${t%%[=:[:space:]]*}"
    [ "$key" = "$want" ] || continue
    after="${t#"$key"}"
    after="${after#"${after%%[![:space:]]*}"}"
    case "$after" in [=:]*) after="${after#?}" ;; esac
    after="${after#"${after%%[![:space:]]*}"}"
    val="$after"
    found=1
  done < "$file"
  [ "$found" -eq 1 ] || return 1
  printf '%s' "$val"
}

# Turn a manifest path token into a machine-independent blob slug.
# A bare char-replace would collide (e.g. a/b and a_b both → a_b), so append a
# checksum of the original path to keep distinct targets' blobs distinct.
_secrets_files_slug() {
  local p="$1"
  local clean="${p//[!A-Za-z0-9._-]/_}"
  local sum
  sum=$(printf '%s' "$p" | cksum | cut -d' ' -f1)
  printf '%s-%s' "$clean" "$sum"
}

# Merge managed key=value lines (from $2) into target file $1, preserving
# all unrelated lines/comments/order. Updates a managed key in place (first
# occurrence), collapses duplicates, appends new keys. Atomic + mode-safe.
merge_gradle_keys() {
  local target="$1" kvfile="$2"
  local -a mkey=() mval=() seen=()
  local line key val i
  while IFS= read -r line || [ -n "$line" ]; do
    [ -n "$line" ] || continue
    key="${line%%=*}"
    val="${line#*=}"
    mkey+=("$key"); mval+=("$val"); seen+=(0)
  done < "$kvfile"
  local n=${#mkey[@]}
  [ "$n" -gt 0 ] || return 0

  local dir; dir=$(dirname "$target")
  mkdir -p "$dir"
  local tmp; tmp=$(mktemp "$dir/.gradle-merge.XXXXXX") || return 1

  local cont=0 t tkey matched
  if [ -f "$target" ]; then
    while IFS= read -r line || [ -n "$line" ]; do
      local stripped="${line%$'\r'}"
      if [ "$cont" -eq 1 ]; then
        printf '%s\n' "$line" >> "$tmp"
        _trailing_bs_odd "$stripped" && cont=1 || cont=0
        continue
      fi
      _trailing_bs_odd "$stripped" && cont=1 || cont=0
      t="${stripped#"${stripped%%[![:space:]]*}"}"
      case "$t" in ''|'#'*|'!'*) printf '%s\n' "$line" >> "$tmp"; continue ;; esac
      tkey="${t%%[=:[:space:]]*}"
      matched=-1
      for ((i = 0; i < n; i++)); do
        if [ "$tkey" = "${mkey[$i]}" ]; then matched=$i; break; fi
      done
      if [ "$matched" -ge 0 ]; then
        if [ "${seen[$matched]}" -eq 0 ]; then
          printf '%s=%s\n' "${mkey[$matched]}" "${mval[$matched]}" >> "$tmp"
          seen[$matched]=1
        fi
      else
        printf '%s\n' "$line" >> "$tmp"
      fi
    done < "$target"
  fi
  for ((i = 0; i < n; i++)); do
    if [ "${seen[$i]}" -eq 0 ]; then
      printf '%s=%s\n' "${mkey[$i]}" "${mval[$i]}" >> "$tmp"
    fi
  done

  # Back up the existing target before overwriting (seatbelt for the merge
  # engine touching a hand-maintained file), preserve mode, atomic rename.
  if [ -f "$target" ]; then
    cp "$target" "$target.secrets-bak" 2>/dev/null || true
    local mode
    mode=$(stat -f '%Lp' "$target" 2>/dev/null || stat -c '%a' "$target" 2>/dev/null || echo 600)
    chmod "$mode" "$tmp" 2>/dev/null || true
  else
    chmod 600 "$tmp" 2>/dev/null || true
  fi
  # TOCTOU recheck before the write into $HOME.
  if [ -L "$target" ]; then
    rm -f "$tmp"
    echo "ERROR: $target became a symlink; aborting merge." >&2
    return 1
  fi
  mv "$tmp" "$target"
}

# Encrypt the managed keys declared in <root>/.secrets-files into
# <project>/external/. Returns 0 if at least one entry was pushed, 1 if
# there is no usable manifest. Dies on unsafe targets or all-missing keys.
push_external_files() {
  local root="$1" project="$2" pubkey="$3"
  local manifest="$root/$SECRETS_FILES_NAME"
  [ -e "$manifest" ] || return 1
  if [ -L "$manifest" ]; then
    echo "WARNING: $manifest is a symlink; ignoring." >&2
    return 1
  fi
  [ -f "$manifest" ] || return 1

  local pushed=0 mtype mpath mkeys
  while IFS=$'\t' read -r mtype mpath mkeys; do
    [ -n "$mtype" ] || continue
    local expanded; expanded=$(_expand_store_path "$mpath")
    if ! _validate_external_target_path "$expanded"; then
      die "Refusing unsafe external target in $SECRETS_FILES_NAME: $mpath"
    fi
    if [ ! -f "$expanded" ]; then
      echo "WARNING: source '$mpath' not found on this machine; skipping." >&2
      continue
    fi
    local tmp; tmp=$(mktemp)
    local found=0 k v
    for k in $mkeys; do
      if v=$(_props_get "$expanded" "$k"); then
        if _trailing_bs_odd "$v"; then
          # A trailing odd backslash means a multi-line (continuation) value.
          # We only support single-line values; syncing this would write a
          # dangling backslash that turns the next target line into a
          # continuation and corrupts the file. Skip it loudly.
          echo "WARNING: key '$k' in $mpath has a multi-line (continuation) value — not supported, skipping." >&2
        else
          printf '%s=%s\n' "$k" "$v" >> "$tmp"
          found=$((found + 1))
        fi
      else
        echo "WARNING: key '$k' not found in $mpath — not synced. Set it locally first, or remove it from $SECRETS_FILES_NAME." >&2
      fi
    done
    if [ "$found" -eq 0 ]; then
      rm -f "$tmp"
      die "No managed keys found in $mpath (looked for: $mkeys)."
    fi
    mkdir -p "$SECRETS_DIR/$project/external"
    local slug; slug=$(_secrets_files_slug "$mpath")
    age -r "$pubkey" -o "$SECRETS_DIR/$project/external/$slug.$mtype.age" "$tmp"
    rm -f "$tmp"
    info "Extracted $found key(s) from $mpath"
    pushed=$((pushed + 1))
  done < <(_parse_secrets_files_manifest "$manifest")

  [ "$pushed" -gt 0 ]
}

# Decrypt the external blobs named by <root>/.secrets-files and merge their
# keys into the declared targets. Skips (with a warning) unsafe targets or
# missing blobs rather than aborting the whole pull.
pull_external_files() {
  local root="$1" project="$2"
  local manifest="$root/$SECRETS_FILES_NAME"
  [ -e "$manifest" ] || return 0
  if [ -L "$manifest" ]; then
    echo "WARNING: $manifest is a symlink; ignoring." >&2
    return 0
  fi
  [ -f "$manifest" ] || return 0

  local mtype mpath mkeys
  while IFS=$'\t' read -r mtype mpath mkeys; do
    [ -n "$mtype" ] || continue
    local expanded; expanded=$(_expand_store_path "$mpath")
    if ! _validate_external_target_path "$expanded"; then
      echo "WARNING: skipping unsafe external target: $mpath" >&2
      continue
    fi
    local slug; slug=$(_secrets_files_slug "$mpath")
    local blob="$SECRETS_DIR/$project/external/$slug.$mtype.age"
    if [ ! -f "$blob" ]; then
      echo "WARNING: $SECRETS_FILES_NAME names '$mpath' but no encrypted data exists in the store yet. Run 'secrets push' on a machine that has these keys. Skipping." >&2
      continue
    fi
    local tmp; tmp=$(mktemp)
    if ! age -d -i "$KEY_FILE" -o "$tmp" "$blob"; then
      rm -f "$tmp"
      die "Decryption failed for external target $mpath."
    fi
    local k k_esc
    for k in $mkeys; do
      # Escape regex-special '.' so e.g. systemProp.foo can't match systemPropXfoo.
      k_esc=$(printf '%s' "$k" | sed 's/\./\\./g')
      grep -q "^$k_esc=" "$tmp" 2>/dev/null || echo "WARNING: '$k' listed in $SECRETS_FILES_NAME but absent from synced data for $mpath." >&2
    done
    if [ ! -d "$(dirname "$expanded")" ]; then
      echo "WARNING: creating $(dirname "$expanded")" >&2
    fi
    local count; count=$(grep -c '=' "$tmp" 2>/dev/null || true); count=${count:-0}
    if merge_gradle_keys "$expanded" "$tmp"; then
      local klist; klist=$(printf '%s' "$mkeys" | tr ' ' ',' | sed 's/,/, /g')
      info "Merged $count key(s) into $expanded ($klist)"
    else
      echo "WARNING: failed to merge keys into $expanded — target left unchanged." >&2
    fi
    rm -f "$tmp"
  done < <(_parse_secrets_files_manifest "$manifest")
}

# Read package.json workspaces and expand globs to actual directories.
# Prints one workspace path per line (relative to the monorepo root).
get_workspaces() {
  local root="$1"
  local pkg="$root/package.json"
  [ -f "$pkg" ] || die "No package.json found in $root"
  check_cmd jq

  local patterns
  patterns=$(jq -r '.workspaces // .workspaces.packages // empty | .[]' "$pkg" 2>/dev/null)
  [ -n "$patterns" ] || die "No workspaces field in $pkg"

  # Expand each glob pattern relative to root
  local old_dir="$PWD"
  cd "$root"
  for pattern in $patterns; do
    # Use bash glob expansion
    for dir in $pattern; do
      [ -d "$dir" ] && echo "$dir"
    done
  done
  cd "$old_dir"
}

install_hook() {
  local hook_src="$SCRIPT_DIR/hooks/pre-commit"
  local hook_dst="$SECRETS_DIR/.git/hooks/pre-commit"
  if [ -f "$hook_src" ]; then
    cp "$hook_src" "$hook_dst"
    chmod +x "$hook_dst"
  else
    # Inline hook if template not found (e.g. secrets installed standalone)
    cat > "$hook_dst" << 'HOOKEOF'
#!/usr/bin/env bash
BLOCKED=$(git diff --cached --name-only | grep -E '(\.env|\.dev\.vars|gradle\.properties)' | grep -v '\.age$' || true)
if [ -n "$BLOCKED" ]; then
  echo "ERROR: Plaintext secret files staged for commit:"
  echo "$BLOCKED"
  echo "Only .age (encrypted) files should be committed."
  exit 1
fi
HOOKEOF
    chmod +x "$hook_dst"
  fi
}

# ─── Subcommands ───────────────────────────────────────────────────────

cmd_init() {
  check_cmd age
  check_cmd git
  resolve_store

  if [ -d "$SECRETS_DIR/.git" ]; then
    die "Already initialized at $SECRETS_DIR. Key file preserved."
  fi

  info "Initializing secrets repo at $SECRETS_DIR"
  mkdir -p "$SECRETS_DIR"
  git init "$SECRETS_DIR" >/dev/null

  # Generate age key pair
  info "Generating age key pair"
  age-keygen -o "$KEY_FILE" 2>&1

  # Write .gitignore
  cat > "$SECRETS_DIR/.gitignore" << 'EOF'
# Never commit the private key
key.txt

# Block plaintext secret files
**/.env
**/.env.*
**/.dev.vars

# Allow encrypted files
!**/.env.age
!**/.env.*.age
!**/.dev.vars.age
EOF

  # Install pre-commit hook
  mkdir -p "$SECRETS_DIR/.git/hooks"
  install_hook

  local pubkey
  pubkey=$(get_pubkey)

  info "Done! Your public key is:"
  echo "  $pubkey"
  echo ""
  echo "Next steps:"
  echo "  1. Add a remote:  cd $SECRETS_DIR && git remote add origin <url>"
  echo "  2. Copy $KEY_FILE to your other machine (AirDrop, scp, USB)"
  echo "  3. Run 'secrets push <project>' from a project directory"
}

# Encrypt env files from a source dir into a project path in the secrets repo.
# Does NOT commit or push — caller handles that.
push_dir_to_project() {
  local source_dir="$1"
  local project="$2"
  local pubkey="$3"

  if ! collect_env_files "$source_dir"; then
    return 1
  fi

  info "$project: ${#COLLECTED_FILES[@]} file(s)"
  for f in "${COLLECTED_FILES[@]}"; do
    echo "  $(basename "$f")"
  done

  mkdir -p "$SECRETS_DIR/$project"
  for f in "${COLLECTED_FILES[@]}"; do
    local name
    name=$(basename "$f")
    age -r "$pubkey" -o "$SECRETS_DIR/$project/${name}.age" "$f"
  done
  return 0
}

# Git commit + push for the secrets repo. Shared by push and push --workspaces.
commit_and_push_secrets() {
  local message="$1"

  if git -C "$SECRETS_DIR" remote get-url origin >/dev/null 2>&1; then
    if ! git -C "$SECRETS_DIR" pull --ff-only 2>/dev/null; then
      die "Fast-forward pull failed. Run 'secrets pull' first, then retry push."
    fi
  fi

  git -C "$SECRETS_DIR" add -A
  if git -C "$SECRETS_DIR" diff --cached --quiet 2>/dev/null; then
    info "No changes to push (secrets unchanged)"
    return
  fi
  git -C "$SECRETS_DIR" commit -m "$message" >/dev/null
  if git -C "$SECRETS_DIR" remote get-url origin >/dev/null 2>&1; then
    git -C "$SECRETS_DIR" push >/dev/null 2>&1
    info "Pushed to remote"
  else
    info "Committed locally (no remote configured)"
  fi
}

cmd_push() {
  check_cmd age
  check_cmd git
  resolve_store
  check_initialized
  check_key

  local project
  project=$(derive_project_name "${1:-}")
  info "Pushing secrets for project: $project"
  echo_store_if_non_default

  local pubkey
  pubkey=$(get_pubkey)

  local did=0
  if push_dir_to_project "$PWD" "$project" "$pubkey"; then did=1; fi
  if push_external_files "$PWD" "$project" "$pubkey"; then did=1; fi
  if [ "$did" -eq 0 ]; then
    die "No secret files (.env, .env.*, .dev.vars) or $SECRETS_FILES_NAME entries found in $PWD"
  fi

  commit_and_push_secrets "update $project"
}

cmd_push_workspaces() {
  check_cmd age
  check_cmd git
  check_cmd jq
  resolve_store
  check_initialized
  check_key

  local root="$PWD"
  local monorepo_name
  monorepo_name=$(derive_project_name "")
  info "Pushing workspaces for monorepo: $monorepo_name"
  echo_store_if_non_default

  local pubkey
  pubkey=$(get_pubkey)
  local total=0

  # Push root env files (if any)
  if push_dir_to_project "$root" "$monorepo_name" "$pubkey"; then
    total=$((total + ${#COLLECTED_FILES[@]}))
  fi

  # Push each workspace
  local workspaces
  workspaces=$(get_workspaces "$root")
  while IFS= read -r ws; do
    [ -n "$ws" ] || continue
    local ws_dir="$root/$ws"
    local ws_project="$monorepo_name/$ws"
    if push_dir_to_project "$ws_dir" "$ws_project" "$pubkey"; then
      total=$((total + ${#COLLECTED_FILES[@]}))
    fi
  done <<< "$workspaces"

  # External files (.secrets-files) are monorepo-root-scoped, like
  # .secrets-store — handle once, not per-workspace.
  if push_external_files "$root" "$monorepo_name" "$pubkey"; then
    total=$((total + 1))
  fi

  if [ "$total" -eq 0 ]; then
    die "No secret files found in any workspace"
  fi

  commit_and_push_secrets "update $monorepo_name workspaces"
}

cmd_pull() {
  check_cmd age
  check_cmd git
  resolve_store
  check_initialized
  check_key

  local project
  project=$(derive_project_name "${1:-}")
  local target_dir="$PWD"
  info "Pulling secrets for project: $project"
  echo_store_if_non_default

  # Pull latest
  if git -C "$SECRETS_DIR" remote get-url origin >/dev/null 2>&1; then
    git -C "$SECRETS_DIR" pull >/dev/null 2>&1
  fi

  # Check project exists
  if [ ! -d "$SECRETS_DIR/$project" ]; then
    die "Project '$project' not found. Run: secrets list"
  fi

  # Decrypt each .age file into target dir (including dotfiles)
  local count=0
  for f in "$SECRETS_DIR/$project"/*.age "$SECRETS_DIR/$project"/.*.age; do
    [ -f "$f" ] || continue
    local name
    name=$(basename "$f" .age)
    local outfile="$target_dir/$name"
    age -d -i "$KEY_FILE" -o "$outfile" "$f"
    # Integrity check: verify non-empty
    if [ ! -s "$outfile" ]; then
      echo "WARNING: Decrypted file '$name' is empty (possibly truncated .age blob)"
    fi
    count=$((count + 1))
  done

  info "Decrypted $count file(s) into $target_dir"

  # Merge any external files (.secrets-files) declared in this project.
  pull_external_files "$PWD" "$project"

  # Reinstall hook if missing
  if [ ! -x "$SECRETS_DIR/.git/hooks/pre-commit" ]; then
    install_hook
    info "Reinstalled pre-commit hook"
  fi
}

# Pull and decrypt .age files from a project path into a target directory.
# Does NOT do git pull — caller handles that.
pull_project_to_dir() {
  local project="$1"
  local target_dir="$2"
  local project_dir="$SECRETS_DIR/$project"

  [ -d "$project_dir" ] || return 1

  local count=0
  for f in "$project_dir"/*.age "$project_dir"/.*.age; do
    [ -f "$f" ] || continue
    local name
    name=$(basename "$f" .age)
    local outfile="$target_dir/$name"
    age -d -i "$KEY_FILE" -o "$outfile" "$f"
    if [ ! -s "$outfile" ]; then
      echo "WARNING: Decrypted file '$name' is empty (possibly truncated .age blob)"
    fi
    count=$((count + 1))
  done
  echo "$count"
}

cmd_pull_workspaces() {
  check_cmd age
  check_cmd git
  check_cmd jq
  resolve_store
  check_initialized
  check_key

  local root="$PWD"
  local monorepo_name
  monorepo_name=$(derive_project_name "")
  info "Pulling workspaces for monorepo: $monorepo_name"
  echo_store_if_non_default

  # Pull latest from remote
  if git -C "$SECRETS_DIR" remote get-url origin >/dev/null 2>&1; then
    git -C "$SECRETS_DIR" pull >/dev/null 2>&1
  fi

  local total=0

  # Pull root secrets (if any)
  if [ -d "$SECRETS_DIR/$monorepo_name" ]; then
    local count
    count=$(pull_project_to_dir "$monorepo_name" "$root")
    total=$((total + count))
    info "$monorepo_name (root): $count file(s)"
  fi

  # Pull each workspace
  local workspaces
  workspaces=$(get_workspaces "$root")
  while IFS= read -r ws; do
    [ -n "$ws" ] || continue
    local ws_dir="$root/$ws"
    local ws_project="$monorepo_name/$ws"
    if [ -d "$SECRETS_DIR/$ws_project" ]; then
      local count
      count=$(pull_project_to_dir "$ws_project" "$ws_dir")
      total=$((total + count))
      info "$ws_project: $count file(s)"
    fi
  done <<< "$workspaces"

  # External files (.secrets-files) are monorepo-root-scoped — once.
  if [ -f "$root/$SECRETS_FILES_NAME" ] && [ ! -L "$root/$SECRETS_FILES_NAME" ]; then
    pull_external_files "$root" "$monorepo_name"
    total=$((total + 1))
  fi

  if [ "$total" -eq 0 ]; then
    die "No secrets found for any workspace in $monorepo_name"
  fi

  info "Decrypted $total file(s) total"

  # Reinstall hook if missing
  if [ ! -x "$SECRETS_DIR/.git/hooks/pre-commit" ]; then
    install_hook
    info "Reinstalled pre-commit hook"
  fi
}

cmd_list() {
  resolve_store
  check_initialized

  local found=0
  for dir in "$SECRETS_DIR"/*/; do
    [ -d "$dir" ] || continue
    local project
    project=$(basename "$dir")
    # Skip hidden dirs
    [[ "$project" == .* ]] && continue
    echo "$project:"
    for f in "$dir"*.age "$dir".*.age; do
      [ -f "$f" ] || continue
      echo "  $(basename "$f" .age)"
      found=1
    done
    # External files live in a subdir, invisible to the globs above.
    if [ -d "${dir}external" ]; then
      for f in "${dir}external"/*.age; do
        [ -f "$f" ] || continue
        echo "  [external] $(basename "$f" .age)"
        found=1
      done
    fi
  done

  if [ "$found" -eq 0 ]; then
    echo "No projects found. Run 'secrets push <project>' to add one."
  fi

  # DX-7 hint: when a non-default store is active, point users at `secrets which`.
  if [ "$SECRETS_DIR" != "$HOME/.secrets" ]; then
    echo ""
    info "Showing projects in $SECRETS_DIR. Run 'secrets which' for details."
  fi
}

cmd_rm() {
  check_cmd git
  resolve_store
  check_initialized

  local project="${1:-}"
  [ -n "$project" ] || die "Usage: secrets rm <project>"

  if [ ! -d "$SECRETS_DIR/$project" ]; then
    die "Project '$project' not found. Run: secrets list"
  fi

  info "Removing project: $project"
  git -C "$SECRETS_DIR" rm -r "$project/" >/dev/null
  git -C "$SECRETS_DIR" commit -m "remove $project" >/dev/null
  if git -C "$SECRETS_DIR" remote get-url origin >/dev/null 2>&1; then
    git -C "$SECRETS_DIR" push >/dev/null 2>&1
    info "Removed $project from remote"
  else
    info "Removed $project locally (no remote configured)"
  fi
}

cmd_rekey() {
  check_cmd age
  check_cmd git
  resolve_store
  check_initialized
  check_key

  # Create temp dir with cleanup trap
  local tmpdir
  tmpdir=$(mktemp -d)
  # `${tmpdir:-}` guards against `set -u` if the trap somehow fires after the
  # function returns (the local would be out of scope). Normal completion
  # cleans up explicitly and clears the trap at the end of this function.
  trap 'rm -rf "${tmpdir:-}"' EXIT INT TERM

  info "Decrypting all files with current key..."

  # Decrypt all .age files into temp dir
  local file_count=0
  for dir in "$SECRETS_DIR"/*/; do
    [ -d "$dir" ] || continue
    local project
    project=$(basename "$dir")
    [[ "$project" == .* ]] && continue
    mkdir -p "$tmpdir/$project"
    for f in "$dir"*.age "$dir".*.age; do
      [ -f "$f" ] || continue
      local name
      name=$(basename "$f" .age)
      if ! age -d -i "$KEY_FILE" -o "$tmpdir/$project/$name" "$f"; then
        die "Decryption failed for $project/$name. Rekey aborted. Old key preserved."
      fi
      file_count=$((file_count + 1))
    done
    # External files live in a subdir; rekey them too or they become
    # undecryptable after rotation.
    if [ -d "${dir}external" ]; then
      mkdir -p "$tmpdir/$project/external"
      for f in "${dir}external"/*.age; do
        [ -f "$f" ] || continue
        local ename
        ename=$(basename "$f" .age)
        if ! age -d -i "$KEY_FILE" -o "$tmpdir/$project/external/$ename" "$f"; then
          die "Decryption failed for $project/external/$ename. Rekey aborted. Old key preserved."
        fi
        file_count=$((file_count + 1))
      done
    fi
  done

  if [ "$file_count" -eq 0 ]; then
    die "No encrypted files found. Nothing to rekey."
  fi

  info "Decrypted $file_count file(s). Generating new key pair..."

  # Generate the new key. age-keygen refuses to overwrite an existing
  # file, so generate into the temp dir and move it into place only on
  # success — the old key stays intact if generation fails.
  local newkey="$tmpdir/key.txt.new"
  age-keygen -o "$newkey" 2>&1
  mv "$newkey" "$KEY_FILE"
  local pubkey
  pubkey=$(get_pubkey)

  info "Re-encrypting all files with new key..."

  # Re-encrypt all files
  for dir in "$tmpdir"/*/; do
    [ -d "$dir" ] || continue
    local project
    project=$(basename "$dir")
    mkdir -p "$SECRETS_DIR/$project"
    for f in "$dir"*; do
      [ -f "$f" ] || continue
      local name
      name=$(basename "$f")
      age -r "$pubkey" -o "$SECRETS_DIR/$project/${name}.age" "$f"
    done
    if [ -d "${dir}external" ]; then
      mkdir -p "$SECRETS_DIR/$project/external"
      for f in "${dir}external"/*; do
        [ -f "$f" ] || continue
        local ename
        ename=$(basename "$f")
        age -r "$pubkey" -o "$SECRETS_DIR/$project/external/${ename}.age" "$f"
      done
    fi
  done

  # Commit and push
  git -C "$SECRETS_DIR" add -A
  git -C "$SECRETS_DIR" commit -m "rekey all secrets" >/dev/null
  if git -C "$SECRETS_DIR" remote get-url origin >/dev/null 2>&1; then
    git -C "$SECRETS_DIR" push >/dev/null 2>&1
    info "Pushed rekeyed secrets to remote"
  else
    info "Committed rekeyed secrets locally (no remote configured)"
  fi

  info "Rekey complete!"
  echo ""
  echo "IMPORTANT: Copy new key to your other machine:"
  echo "  scp $KEY_FILE <other-machine>:$KEY_FILE"
  echo ""
  echo "WARNING: Old ciphertext remains in git history."
  echo "For full rotation, create a fresh repo."

  # Clean up the plaintext temp dir while $tmpdir is still in scope, then
  # drop the trap so it can't fire (and error under set -u) post-return.
  rm -rf "$tmpdir"
  trap - EXIT INT TERM
}

cmd_clear() {
  local dir="$PWD"
  if ! collect_env_files "$dir"; then
    info "No secret files to clear in $dir"
    return
  fi

  local count=0
  for f in "${COLLECTED_FILES[@]}"; do
    rm "$f"
    count=$((count + 1))
  done
  info "Cleared $count secret file(s) from $dir"
}

cmd_clear_workspaces() {
  check_cmd jq

  local root="$PWD"
  local total=0

  # Clear root
  if collect_env_files "$root"; then
    for f in "${COLLECTED_FILES[@]}"; do
      rm "$f"
      total=$((total + 1))
    done
  fi

  # Clear each workspace
  local workspaces
  workspaces=$(get_workspaces "$root")
  while IFS= read -r ws; do
    [ -n "$ws" ] || continue
    local ws_dir="$root/$ws"
    if collect_env_files "$ws_dir"; then
      for f in "${COLLECTED_FILES[@]}"; do
        rm "$f"
        total=$((total + 1))
      done
    fi
  done <<< "$workspaces"

  info "Cleared $total secret file(s) from workspace"
}

# EXIT-trap helpers for cmd_run. Defined as functions (not inline string
# traps) so $_RUN_PWD is dereferenced safely regardless of special chars
# in the path. F1: trap "cd '$X'" breaks when X contains a single quote.
_run_cleanup() {
  cd -- "${_RUN_PWD:-.}" 2>/dev/null && cmd_clear
}
_run_cleanup_workspaces() {
  cd -- "${_RUN_PWD:-.}" 2>/dev/null && cmd_clear_workspaces
}

cmd_run() {
  local workspace_mode=false
  local project=""

  # Parse flags before the command
  while [ $# -gt 0 ]; do
    case "$1" in
      -w|--workspaces) workspace_mode=true; shift ;;
      --) shift; break ;;
      -*) die "Unknown flag: $1. Usage: secrets run [-w] [--] <command...>" ;;
      *) break ;;
    esac
  done

  [ $# -gt 0 ] || die "Usage: secrets run [-w] [--] <command...>"

  # F8: pin the project directory now so the EXIT trap clears the right
  # plaintext files even if the user's command does `cd` into another dir.
  # Use a global + named function (NOT string-interpolated trap) so paths
  # with special characters — apostrophes, dollar signs, spaces — work.
  # Single-quoting `$_RUN_PWD` into a string trap would break on any path
  # with a single quote (e.g. /Users/bri/it's-app), and the trap would
  # silently fail to clean up plaintext secrets. EGB-281 F1.
  _RUN_PWD="$PWD"

  # Pull secrets (cmd_pull/cmd_pull_workspaces call resolve_store internally)
  if [ "$workspace_mode" = true ]; then
    cmd_pull_workspaces
  else
    cmd_pull "$project"
  fi

  if [ "$workspace_mode" = true ]; then
    trap _run_cleanup_workspaces EXIT
  else
    trap _run_cleanup EXIT
  fi

  # Execute the command, capturing exit code (don't let set -e kill us)
  local rc=0
  "$@" || rc=$?
  exit "$rc"
}

cmd_which() {
  resolve_store
  echo "store:  $SECRETS_DIR"
  echo "source: $STORE_SOURCE"

  # Read back any external-file manifest in cwd (validates the format and
  # gives the user a way to confirm it parsed, since there's no add-file
  # command). Skips symlinked manifests.
  local manifest="$PWD/$SECRETS_FILES_NAME"
  if [ -f "$manifest" ] && [ ! -L "$manifest" ]; then
    local mtype mpath mkeys printed=0
    while IFS=$'\t' read -r mtype mpath mkeys; do
      [ -n "$mtype" ] || continue
      if [ "$printed" -eq 0 ]; then
        echo "external files ($SECRETS_FILES_NAME at $manifest):"
        printed=1
      fi
      echo "  $mtype  $mpath  $mkeys"
    done < <(_parse_secrets_files_manifest "$manifest")
  fi
}

cmd_help() {
  cat << 'EOF'
secrets — encrypted secret file sync between machines

Usage:
  secrets init                  Initialize the secrets repo and generate an age key
  secrets push [project]        Encrypt secret files and push to the secrets repo
  secrets push -w|--workspaces  Push secrets from all workspaces in package.json
  secrets pull [project]        Pull and decrypt secret files into current directory
  secrets pull -w|--workspaces  Pull secrets into all workspaces from package.json
  secrets clear                 Remove plaintext secret files from current directory
  secrets clear -w|--workspaces Clear secrets from all workspaces in package.json
  secrets run [-w] <command>    Pull secrets, run command, clear secrets on exit
  secrets list                  List all projects and their secret files
  secrets rm <project>          Remove a project's secrets from the repo
  secrets rekey                 Re-encrypt all secrets with a new key
  secrets which                 Show the active store path and which rule chose it
  secrets where                 Alias for `which`
  secrets status                Alias for `which`

Tracked files: .env, .env.*, .dev.vars

If [project] is omitted, it is derived from the current directory's
git remote (if available) or the directory name.

Stores:
  Most users have one ~/.secrets/ store. To use a separate store (e.g.
  for work secrets vs personal), use any of these resolution rules
  (highest precedence first):

    1. --store <dir>  flag             secrets --store ~/.secrets-work pull
    2. .secrets-store file in project  echo work > .secrets-store && git add ...
    3. SECRETS_DIR env var (legacy)    SECRETS_DIR=~/.secrets-work secrets pull
    4. ~/.secrets default

  Bare names ("work") expand to ~/.secrets-work. The name "default"
  resolves to ~/.secrets. Run `secrets which` to inspect the active store.

  Optional .secrets-store URL hint:
    A second whitespace-separated token on the line is treated as the
    store's git remote URL. It is used to fill in a runnable `git clone
    <url> <path>` in the missing-store error so teammates joining the
    project don't have to ask for the URL. Example:
        work git@github.com:acme/work-secrets.git

Workspaces:
  With -w/--workspaces, reads package.json "workspaces" field to find
  workspace directories. Each workspace's secret files are stored under
  <monorepo>/<workspace-path>/ in the secrets repo. Root secret files
  are stored under <monorepo>/ directly. Requires jq.

External files (.secrets-files):
  Sync specific keys from files OUTSIDE the project root (e.g. global
  Gradle properties). Create a committed .secrets-files in the project
  root, one entry per line:

      # <type>             <path>                        <keys...>
      gradle-properties    ~/.gradle/gradle.properties   beaconClerkPkTest beaconClerkPkLive

  On push, the named keys are extracted from <path> and encrypted under
  <project>/external/ in the store. On pull, they are MERGED back into
  <path>, leaving all unrelated keys untouched. Only type
  'gradle-properties' is supported; the target basename must be
  'gradle.properties' and must resolve inside $HOME. Run 'secrets which'
  from the project to confirm the manifest parsed.

  Note: merged keys are written as permanent plaintext into the target
  file (suitable for publishable/low-secrecy values). 'secrets clear'
  does NOT remove them.

Environment:
  SECRETS_DIR    Path to secrets repo (default: ~/.secrets). See also
                 the .secrets-store file and --store flag above.
EOF
}

# ─── Main ──────────────────────────────────────────────────────────────

# Pre-pass: extract --store flag from anywhere in the args (before `--` only).
# Lets `secrets --store work push`, `secrets push --store work`, and
# `secrets run --store work cmd ...` all work consistently. After `--`,
# args belong to the user's command and are passed through untouched.
ARGS=()
while [ $# -gt 0 ]; do
  case "$1" in
    --)
      # Stop pre-pass; pass `--` and everything after through untouched
      # so the user's command (e.g. `secrets run -- cmd --store foo`) is
      # not mangled.
      ARGS+=("$@")
      break
      ;;
    --store)
      [ $# -ge 2 ] || die "--store requires a directory or store name"
      # F3: reject values that look like another flag — almost always a typo
      # (`secrets --store push` → user dropped the value, would silently use
      # ~/.secrets-push and surface a confusing "not initialized" error).
      case "$2" in
        --|-*) die "--store value looks like a flag: $2 (did you forget the value?)" ;;
      esac
      STORE_OVERRIDE="$2"
      shift 2
      ;;
    --store=*)
      # F4: --store= with empty value used to silently fall through to the
      # next rule. Treat it as a typo too.
      [ -n "${1#--store=}" ] || die "--store= requires a value"
      STORE_OVERRIDE="${1#--store=}"
      shift
      ;;
    *)
      ARGS+=("$1")
      shift
      ;;
  esac
done
# Re-set positional params. Bulletproof against empty array under `set -u`.
if [ ${#ARGS[@]} -gt 0 ]; then
  set -- "${ARGS[@]}"
else
  set --
fi

case "${1:-help}" in
  init)   cmd_init ;;
  push)
    if [ "${2:-}" = "-w" ] || [ "${2:-}" = "--workspaces" ]; then
      cmd_push_workspaces
    else
      cmd_push "${2:-}"
    fi
    ;;
  pull)
    if [ "${2:-}" = "-w" ] || [ "${2:-}" = "--workspaces" ]; then
      cmd_pull_workspaces
    else
      cmd_pull "${2:-}"
    fi
    ;;
  clear)
    if [ "${2:-}" = "-w" ] || [ "${2:-}" = "--workspaces" ]; then
      cmd_clear_workspaces
    else
      cmd_clear
    fi
    ;;
  run)
    shift
    cmd_run "$@"
    ;;
  list)   cmd_list ;;
  rm)     cmd_rm "${2:-}" ;;
  rekey)  cmd_rekey ;;
  which|where|status) cmd_which ;;
  help|--help|-h) cmd_help ;;
  *)      die "Unknown command: $1. Run 'secrets help' for usage." ;;
esac