#!/bin/bash

# omarchy:summary=Manage Omarchy shell plugins and bar widgets
# omarchy:group=plugin
# omarchy:args=<list|rescan|enable|disable|add|update|remove|clone|edit|validate|bar> [...]
# omarchy:examples=omarchy plugin list | omarchy plugin add https://github.com/acme/omarchy-weather.git | omarchy plugin update --all | omarchy plugin clone omarchy.clock local.clock | omarchy plugin bar settings

set -euo pipefail

PLUGINS_DIR="$HOME/.config/omarchy/plugins"

# Never let git block an unattended run on a credential or host-key prompt; fail
# fast instead so error paths can handle it.
export GIT_TERMINAL_PROMPT=0
export GIT_SSH_COMMAND="${GIT_SSH_COMMAND:-ssh -oBatchMode=yes}"

usage() {
  cat <<USAGE
Usage: omarchy-plugin <command> [args...]

Manage plugins:
  list [--json]                       List discovered shell plugins
  rescan                              Rescan ~/.config/omarchy/plugins
  enable <id> [placement]             Enable a plugin
  disable <id>                        Disable a plugin

Install from git (a plugin is a git repo):
  add [git-url] [--enable] [--yes]    Clone a plugin repo into your plugins
  update [id | --all] [--yes]         Fetch, review the diff, fast-forward
  remove [id] [--yes]                 Disable and delete an installed plugin

  Plugins are unsandboxed code — review what you add and enable.

Make your own:
  clone [source] [new-id] [options]   Clone a built-in or user plugin
  edit [id]                           Open a user plugin directory in a shell
  validate <plugin-folder>            Check a plugin's manifest (for authors)

Bar commands (delegate to 'omarchy bar'; run 'omarchy bar --help' for details):
  bar settings                        Open the inline bar config panel
  bar list|layout|options|use|reset|add|move|remove|set|position|transparent
  widget|widgets                      Alias of 'bar list'

Examples:
  omarchy plugin add https://github.com/acme/omarchy-weather.git --enable
  omarchy plugin update --all
  omarchy plugin clone omarchy.clock local.clock --name "My Clock" --replace
  omarchy plugin enable acme.weather --section right
USAGE
}

fail() {
  echo "omarchy-plugin: $*" >&2
  exit 1
}

require_omarchy_path() {
  [[ -n ${OMARCHY_PATH:-} ]] || fail "OMARCHY_PATH is not set"
}

require_command() {
  command -v "$1" >/dev/null 2>&1 || fail "$1 is required"
}

interactive() {
  [[ -t 0 && -t 1 ]]
}

# Yes/no prompt. Honours ASSUME_YES, and refuses in a non-interactive context so
# an agent must pass --yes deliberately rather than hang on a prompt.
ASSUME_YES=0
confirm() {
  local prompt="$1"
  (( ASSUME_YES )) && return 0
  if interactive; then
    gum confirm "$prompt"
    return
  fi
  fail "refusing to continue without confirmation; pass --yes"
}

# Plugin ids become paths under PLUGINS_DIR that we mv/rm, so reject anything
# that could escape it (matches the id rules in omarchy-plugin-validate).
valid_plugin_id() {
  [[ $1 =~ ^[A-Za-z0-9][A-Za-z0-9._-]*$ && $1 != *..* ]]
}

installed_plugin_ids() {
  find "$PLUGINS_DIR" -mindepth 1 -maxdepth 1 \( -type d -o -type l \) ! -name '.*' -printf '%f\n' 2>/dev/null | sort
}

plugin_discovered() {
  local id="$1" plugins
  plugins=$(omarchy-shell shell listPlugins 2>/dev/null) || return 1
  jq -e --arg id "$id" 'any(.[]; .id == $id)' <<<"$plugins" >/dev/null 2>&1
}

wait_for_plugin_discovery() {
  local id="$1" attempt
  for (( attempt = 0; attempt < 40; attempt++ )); do
    plugin_discovered "$id" && return 0
    sleep 0.05
  done
  return 1
}

print_plugins() {
  local json="false"

  while (( $# > 0 )); do
    case "$1" in
    --json)
      json="true"
      ;;
    -h | --help)
      usage
      exit 0
      ;;
    *)
      fail "unknown list option: $1"
      ;;
    esac
    shift
  done

  local plugins
  plugins=$(omarchy-shell shell listPlugins) || fail "could not list plugins; is omarchy-shell running?"

  if [[ $json == "true" ]]; then
    printf '%s\n' "$plugins"
    return
  fi

  require_command jq
  jq -r '
    sort_by(.id)[] |
    [ .id,
      (if .enabled then "enabled" else "disabled" end),
      (if .firstParty then "first-party" else "third-party" end),
      ((.kinds // []) | join(",")),
      (.name // "")
    ] | @tsv
  ' <<<"$plugins" | awk -F '\t' '
    BEGIN { printf "%-32s %-9s %-11s %-18s %s\n", "ID", "STATE", "SOURCE", "KINDS", "NAME" }
    { printf "%-32s %-9s %-11s %-18s %s\n", $1, $2, $3, $4, $5 }
  '
}

rescan_plugins() {
  (( $# == 0 )) || fail "rescan does not take arguments"
  omarchy-shell shell rescanPlugins || fail "could not rescan plugins; is omarchy-shell running?"
  echo "Plugins rescanned"
}

plugin_enabled() {
  local enabled="$1"
  local id="${2:-}"
  [[ -n $id ]] || fail "plugin id is required"
  shift 2

  if [[ $enabled != "true" && $# -gt 0 ]]; then
    fail "disable does not take placement options"
  fi

  omarchy-shell shell rescanPlugins >/dev/null 2>&1 || true
  if [[ $enabled == "true" ]]; then
    require_command jq
    wait_for_plugin_discovery "$id" || fail "plugin '$id' was not discovered; is omarchy-shell running?"
  fi

  local result
  result=$(omarchy-shell shell setPluginEnabled "$id" "$enabled") || fail "could not update plugin; is omarchy-shell running?"
  [[ $result == "ok" ]] || fail "plugin '$id' is not known; run: omarchy plugin rescan"

  if [[ $enabled == "true" && $# -gt 0 ]]; then
    omarchy-bar move "$id" "$@"
    echo "Enabled and moved $id"
  elif [[ $enabled == "true" ]]; then
    echo "Enabled $id"
  else
    echo "Disabled $id"
  fi
}

# ---------------------------------------------------------------- add

plugin_add() {
  require_command git
  require_command jq

  local url="" enable_after=""
  while (( $# > 0 )); do
    case "$1" in
    --enable) enable_after=true; shift ;;
    --no-enable) enable_after=false; shift ;;
    --yes | -y) ASSUME_YES=1; shift ;;
    -h | --help) usage; return 0 ;;
    -*) fail "unknown add option: $1" ;;
    *)
      [[ -z $url ]] || fail "unexpected argument: $1"
      url="$1"; shift ;;
    esac
  done

  if [[ -z $url ]]; then
    interactive || fail "a git URL is required (e.g. omarchy plugin add https://github.com/acme/omarchy-weather.git)"
    url=$(gum input --prompt "Git URL of the plugin repo: ") || fail "cancelled"
    [[ -n $url ]] || fail "a git URL is required"
  fi

  if (( ! ASSUME_YES )); then
    cat >&2 <<WARN

⚠️  Plugins run as arbitrary, unsandboxed code inside your long-lived
  omarchy-shell process. Only add repos you trust, and review the code
  before you enable it.

      URL: $url

WARN
    confirm "Clone and add this plugin?" || fail "aborted"
  fi

  mkdir -p "$PLUGINS_DIR"

  # Clone into a dot-prefixed staging dir (invisible to the plugin scanner) so
  # a plugin only ever appears under its manifest id, fully validated.
  local stage="$PLUGINS_DIR/.add.tmp.$$"
  rm -rf "$stage"
  if ! git clone -- "$url" "$stage"; then
    rm -rf "$stage"
    fail "failed to clone $url"
  fi

  if ! omarchy-plugin-validate "$stage"; then
    rm -rf "$stage"
    fail "refusing to add: validation failed"
  fi

  local id
  id=$(jq -r '.id' "$stage/manifest.json")
  local target="$PLUGINS_DIR/$id"
  if [[ -e $target || -L $target ]]; then
    rm -rf "$stage"
    fail "plugin '$id' is already installed; update it with: omarchy plugin update $id"
  fi
  mv "$stage" "$target"
  echo "Added $id into $target"

  omarchy-shell shell rescanPlugins >/dev/null 2>&1 || true

  if [[ -z $enable_after ]]; then
    if (( ASSUME_YES )) || ! interactive; then
      enable_after=false
    elif confirm "Enable '$id' now?"; then
      enable_after=true
    else
      enable_after=false
    fi
  fi

  if [[ $enable_after == true ]]; then
    if wait_for_plugin_discovery "$id" && [[ $(omarchy-shell shell setPluginEnabled "$id" true) == "ok" ]]; then
      echo "Enabled $id"
    else
      echo "Could not enable $id (is omarchy-shell running?). Enable later with: omarchy plugin enable $id" >&2
    fi
  else
    echo "Enable it later with: omarchy plugin enable $id"
  fi
}

# ---------------------------------------------------------------- update

UPDATED_ANY=0

update_one() {
  local id="$1"
  local dir="$PLUGINS_DIR/$id"

  if ! git -C "$dir" fetch --quiet origin HEAD; then
    echo "omarchy-plugin: fetch failed for '$id'" >&2
    return 1
  fi

  if [[ $(git -C "$dir" rev-parse HEAD) == $(git -C "$dir" rev-parse FETCH_HEAD) ]]; then
    echo "$id is up to date."
    return 0
  fi

  if (( ! ASSUME_YES )); then
    echo "Changes for $id:"
    if command -v delta >/dev/null 2>&1; then
      git -C "$dir" diff HEAD FETCH_HEAD | delta --paging=never
    else
      git -C "$dir" diff HEAD FETCH_HEAD
    fi
    echo
    confirm "Update $id?" || { echo "Skipped $id."; return 0; }
  fi

  if ! git -C "$dir" merge --ff-only FETCH_HEAD >/dev/null 2>&1; then
    echo "omarchy-plugin: cannot fast-forward '$id'; you have local changes in $dir" >&2
    return 1
  fi

  # An update is code the shell will run, same as an add: re-validate, and roll
  # back to the pre-merge commit if upstream turned invalid.
  if ! omarchy-plugin-validate "$dir"; then
    git -C "$dir" reset --hard ORIG_HEAD >/dev/null
    echo "omarchy-plugin: update of '$id' failed validation; rolled back" >&2
    return 1
  fi

  echo "Updated $id."
  UPDATED_ANY=1
}

plugin_update() {
  require_command git

  local id="" all=0
  while (( $# > 0 )); do
    case "$1" in
    --all | -a) all=1; shift ;;
    --yes | -y) ASSUME_YES=1; shift ;;
    -h | --help) usage; return 0 ;;
    -*) fail "unknown update option: $1" ;;
    *)
      [[ -z $id ]] || fail "unexpected argument: $1"
      id="$1"; shift ;;
    esac
  done
  if (( all )) && [[ -n $id ]]; then
    fail "pass either a plugin-id or --all, not both"
  fi

  [[ -d $PLUGINS_DIR ]] || fail "no plugins installed"

  local -a targets=()
  if [[ -n $id ]]; then
    valid_plugin_id "$id" || fail "invalid plugin id '$id'"
    [[ -d "$PLUGINS_DIR/$id" ]] || fail "plugin '$id' is not installed"
    [[ -d "$PLUGINS_DIR/$id/.git" ]] || fail "plugin '$id' is not a git checkout, so there is nothing to pull from"
    targets=("$id")
  else
    local dir
    for dir in "$PLUGINS_DIR"/*/; do
      [[ -d $dir/.git ]] || continue
      targets+=("$(basename "$dir")")
    done
    if (( ${#targets[@]} == 0 )); then
      echo "No git-managed plugins installed."
      return 0
    fi
  fi

  local rc=0
  for id in "${targets[@]}"; do
    update_one "$id" || rc=1
  done

  if (( UPDATED_ANY )); then
    omarchy-shell shell rescanPlugins >/dev/null 2>&1 || true
  fi
  return $rc
}

# ---------------------------------------------------------------- remove

plugin_remove() {
  local id=""
  while (( $# > 0 )); do
    case "$1" in
    --yes | -y) ASSUME_YES=1; shift ;;
    -h | --help) usage; return 0 ;;
    -*) fail "unknown remove option: $1" ;;
    *)
      [[ -z $id ]] || fail "unexpected argument: $1"
      id="$1"; shift ;;
    esac
  done

  [[ -d $PLUGINS_DIR ]] || fail "no plugins installed"

  if [[ -z $id ]]; then
    interactive || fail "a plugin-id is required"
    id=$(installed_plugin_ids | gum choose --header="Remove which plugin?") || fail "cancelled"
    [[ -n $id ]] || fail "nothing selected"
  fi
  valid_plugin_id "$id" || fail "invalid plugin id '$id'"

  local target="$PLUGINS_DIR/$id"
  [[ -e $target || -L $target ]] || fail "plugin '$id' is not installed"

  local was_enabled=""
  local shell_plugins
  if shell_plugins=$(omarchy-shell shell listPlugins 2>/dev/null) && [[ -n $shell_plugins ]]; then
    was_enabled=$(jq -r --arg id "$id" '.[] | select(.id == $id) | .enabled' <<<"$shell_plugins" 2>/dev/null) || true
  fi

  if [[ -L $target ]]; then
    confirm "Unlink '$id' (symlink -> $(readlink "$target"))?" || fail "aborted"
  elif [[ -d $target/.git ]]; then
    confirm "Delete '$id'? Its git repo remains upstream." || fail "aborted"
  else
    confirm "Remove '$id'? The folder will be backed up." || fail "aborted"
  fi

  [[ $was_enabled == "true" ]] && omarchy-shell shell setPluginEnabled "$id" false >/dev/null 2>&1 || true

  if [[ -L $target ]]; then
    # A dev symlink is just unlinked; the files it points at are left alone.
    rm -f "$target"
    echo "Unlinked $id."
  elif [[ -d $target/.git ]]; then
    rm -rf "$target"
    echo "Removed $id."
  else
    # A hand-made plugin may be the user's only copy, so keep a backup.
    local base="$PLUGINS_DIR/.${id}.bak.$(date -u +%Y%m%d%H%M%S)"
    local backup="$base" n=1
    while [[ -e $backup ]]; do backup="${base}-${n}"; n=$((n + 1)); done
    mv "$target" "$backup" || fail "failed to move $target to backup"
    echo "Removed $id. Backup at: $backup"
  fi

  omarchy-shell shell rescanPlugins >/dev/null 2>&1 || true

  if [[ $was_enabled == "true" ]]; then
    echo "Plugin was enabled and was unloaded from omarchy-shell."
  fi
}

# ---------------------------------------------------------------- edit

plugin_edit() {
  local id=""
  while (( $# > 0 )); do
    case "$1" in
    -h | --help) usage; return 0 ;;
    -*) fail "unknown edit option: $1" ;;
    *)
      [[ -z $id ]] || fail "unexpected argument: $1"
      id="$1"; shift ;;
    esac
  done

  if [[ -z $id ]]; then
    interactive || fail "a plugin id is required"
    id=$(installed_plugin_ids | gum choose --header="Edit which plugin?") || fail "cancelled"
    [[ -n $id ]] || fail "nothing selected"
  fi
  valid_plugin_id "$id" || fail "invalid plugin id '$id'"
  [[ $id != omarchy.* ]] || fail "$id is built in; clone it first with: omarchy plugin clone $id"

  local dir="$PLUGINS_DIR/$id"
  [[ -f $dir/manifest.json ]] || fail "no user plugin at $dir"

  if interactive; then
    cd "$dir"
    exec "${SHELL:-bash}"
  fi
  printf '%s\n' "$dir"
}

# ---------------------------------------------------------------- bar

bar_command() {
  local command="${1:-list}"
  [[ $# -gt 0 ]] && shift || true

  case "$command" in
  edit | settings)
    (( $# == 0 )) || fail "bar settings does not take arguments"
    exec omarchy-launch-bar-settings
    ;;
  -h | --help | help)
    usage
    ;;
  *)
    exec omarchy-bar "$command" "$@"
    ;;
  esac
}

command="${1:-}"
case "$command" in
list | ls)
  shift
  print_plugins "$@"
  ;;
rescan)
  shift
  rescan_plugins "$@"
  ;;
enable)
  shift
  plugin_enabled true "$@"
  ;;
disable)
  shift
  plugin_enabled false "$@"
  ;;
add | install)
  shift
  plugin_add "$@"
  ;;
update)
  shift
  plugin_update "$@"
  ;;
remove | rm)
  shift
  plugin_remove "$@"
  ;;
edit)
  shift
  plugin_edit "$@"
  ;;
clone)
  shift
  exec omarchy-plugin-clone "$@"
  ;;
validate)
  shift
  exec omarchy-plugin-validate "$@"
  ;;
bar | widget | widgets)
  shift
  bar_command "$@"
  ;;
-h | --help | help | "")
  usage
  ;;
*)
  fail "unknown command: $command"
  ;;
esac