#!/bin/bash
# Copyright 2019 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

#### CATEGORY=Run, inspect and debug
### run fuchsia devtools

## usage: fx fdt [VERSION]
##   VERSION   Download (if necessary) and run a specific version of
##             Fuchsia devtools. If not specified, the current version
##             in //prebuilt will be used.
##             VERSION is either a CIPD hash or "latest".

source "$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"/lib/vars.sh || exit $?
set -e

PREBUILT_DIR="$FUCHSIA_DIR/prebuilt/gui_tools"
DOWNLOAD_DIR="$FUCHSIA_DIR/prebuilt/gui_tools/download"

# This is an old directory that was used for downloading CIPD files that we
# don't want to use anymore. This script attempts to delete this directory if it
# exists to cleanup old usage. This can be removed eventually.
OLD_DOWNLOAD_DIR="$FUCHSIA_DIR/prebuilt/gui_tools/test_fuchsia_devtools"

if [[ $HOST_PLATFORM == "mac-x64" ]]; then
  BINARY="Fuchsia DevTools.app"
  ZIP="fuchsia_devtools/macos/macos.zip"
  DOWNLOAD_ZIP="$DOWNLOAD_DIR/$ZIP"
  DOWNLOAD_UNZIP_DIR="$DOWNLOAD_DIR/fuchsia_devtools/macos-extracted"
  DOWNLOAD="$DOWNLOAD_UNZIP_DIR/$BINARY"
  PREBUILT_ZIP="$PREBUILT_DIR/$ZIP"
  PREBUILT_UNZIP_DIR="$PREBUILT_DIR/fuchsia_devtools/macos-extracted"
  PREBUILT="$PREBUILT_UNZIP_DIR/$BINARY"
else
  # The _OLD values are to support a temporary transition where we are changing
  # the name of the binary from system_monitor to fuchsia_devtools. Once that
  # change is complete these will be removed.
  BINARY_OLD="system_monitor/linux/system_monitor"
  PREBUILT_OLD="$PREBUILT_DIR/$BINARY_OLD"
  DOWNLOAD_OLD="$DOWNLOAD_DIR/$BINARY_OLD"

  BINARY="system_monitor/linux/fuchsia_devtools"
  PREBUILT="$PREBUILT_DIR/$BINARY"
  DOWNLOAD="$DOWNLOAD_DIR/$BINARY"
fi

# Use prebuilt version if no arguments are passed.
if [[ $# == 0 ]]; then
  if [[ $HOST_PLATFORM == "mac-x64" ]]; then
    # On the mac if we have a prebuilt zip then we are good to go.
    if [[ -e "$PREBUILT_ZIP" ]]; then
      rm -rf "${PREBUILT_UNZIP_DIR}"
      if ! unzip -qq "${PREBUILT_ZIP}" -d "${PREBUILT_UNZIP_DIR}-temp"; then
        rm -rf "${PREBUILT_UNZIP_DIR}-temp"
        echo "Prebuilt archive failed to extract."
        exit 1
      fi
      mv "${PREBUILT_UNZIP_DIR}-temp" "${PREBUILT_UNZIP_DIR}"
      open "$PREBUILT"
      exit 0
    fi
  else
    # else we are on linux
    # If the new prebuilt binary exists, run it.
    if [[ -x "$PREBUILT" ]]; then
      # Maybe add ` > /dev/null 2>&1 &` in the future.
      exec "$PREBUILT"
    # If the old prebuilt binary exists, run it.
    elif [[ $HOST_PLATFORM == "linux-x64" ]] && [[ -x "$PREBUILT_OLD" ]]; then
      # Maybe add ` > /dev/null 2>&1 &` in the future.
      exec "$PREBUILT_OLD"
    fi
  fi
  # We are on mac and don't have a zip file or we are linux and are missing
  # a binary with either the old or new name. This should only happen if the
  # jiri fetch for the prebuilt is not configured properly or has not run.
  cat << end
To use fdt, JIRI should download it. Please run the following commands:
 jiri init -fetch-optional=fuchsia_devtools && jiri fetch-packages --local-manifest=true
end
  exit 1;
fi

# If a specific version of FDT is requested, it can be downloaded directly.
# Check that the fuchsia_devtools are downloaded and then run it.
# If the version is already downloaded, it will not be re-downloaded.

# Using "latest" or a CIPD hash.
version="$1"
shift

# Clean up the old location for downloading CIPD packages if it exists.
if [[ -d "$OLD_DOWNLOAD_DIR" ]]; then
  rm -rf "$OLD_DOWNLOAD_DIR"
fi

if ! echo 'fuchsia_internal/gui_tools/fuchsia_devtools/${platform}' "$version" | cipd ensure -ensure-file - -root "$DOWNLOAD_DIR"; then
  echo "Failed to download $version."
  exit 1
fi

if [[ $HOST_PLATFORM == "mac-x64" ]]; then
  rm -rf "${DOWNLOAD_UNZIP_DIR}"
  if ! unzip -qq "${DOWNLOAD_ZIP}" -d "${DOWNLOAD_UNZIP_DIR}-temp"; then
    rm -rf "${DOWNLOAD_UNZIP_DIR}-temp"
    echo "Downloaded archive for $version failed to extract."
    exit 1
  fi
  mv "${DOWNLOAD_UNZIP_DIR}-temp" "${DOWNLOAD_UNZIP_DIR}"
  open "$DOWNLOAD"
else
  # In the future, we should add the following to eliminate the terminal spam:
  #   > /dev/null 2>&1 &
  # For the near term, using this for debug output is important.
  if [[ -x "$DOWNLOAD" ]]; then
    "$DOWNLOAD" "$@"
  elif [[ -x "$DOWNLOAD_OLD" ]]; then
    "$DOWNLOAD_OLD" "$@"
  else
    echo "Failed to find Fuchsia DevTools binary."
    exit 1
  fi
fi