#
# sets output_port
#  if target_filename is found then that drive is used
#  else if target_drive is found then that drive is used
#
from __future__ import print_function

target_filename = "FIRMWARE.CUR"
target_drive = "REARM"

import os
import getpass
import platform

current_OS = platform.system()
Import("env")

def print_error(e):
    print('\nUnable to find destination disk (' + e + ')\n' \
          'Please select it in platformio.ini using the upload_port keyword ' \
          '(https://docs.platformio.org/en/latest/projectconf/section_env_upload.html) ' \
          'or copy the firmware (.pio/build/' + env.get('PIOENV') + '/firmware.bin) manually to the appropriate disk\n')

try:
    if current_OS == 'Windows':
        #
        # platformio.ini will accept this for a Windows upload port designation: 'upload_port = L:'
        #   Windows - doesn't care about the disk's name, only cares about the drive letter
        #

        #
        # get all drives on this computer
        #
        import subprocess
        # typical result (string): 'Drives: C:\ D:\ E:\ F:\ G:\ H:\ I:\ J:\ K:\ L:\ M:\ Y:\ Z:\'
        driveStr = str(subprocess.check_output("fsutil fsinfo drives"))
        # typical result (string): 'C:\ D:\ E:\ F:\ G:\ H:\ I:\ J:\ K:\ L:\ M:\ Y:\ Z:\'
        # driveStr = driveStr.strip().lstrip('Drives: ') <- Doesn't work in other Languages as English. In German is "Drives:" = "Laufwerke:"
        FirstFound = driveStr.find(':',0,-1)         # Find the first ":" and
        driveStr = driveStr[FirstFound + 1 : -1]     # truncate to the rest
        # typical result (array of stings): ['C:\\', 'D:\\', 'E:\\', 'F:\\',
        # 'G:\\', 'H:\\', 'I:\\', 'J:\\', 'K:\\', 'L:\\', 'M:\\', 'Y:\\', 'Z:\\']
        drives = driveStr.split()

        upload_disk = 'Disk not found'
        target_file_found = False
        target_drive_found = False
        for drive in drives:
            final_drive_name = drive.strip().rstrip('\\')   # typical result (string): 'C:'
            try:
                volume_info = str(subprocess.check_output('cmd /C dir ' + final_drive_name, stderr=subprocess.STDOUT))
            except Exception as e:
                continue
            else:
                if target_drive in volume_info and target_file_found == False:  # set upload if not found target file yet
                    target_drive_found = True
                    upload_disk = final_drive_name
                if target_filename in volume_info:
                    if target_file_found == False:
                        upload_disk = final_drive_name
                    target_file_found = True

        #
        # set upload_port to drive if found
        #

        if target_file_found == True or target_drive_found == True:
            env.Replace(
                UPLOAD_PORT=upload_disk
            )
            print('upload disk: ', upload_disk)
        else:
            print_error('Autodetect Error')

    elif current_OS == 'Linux':
        #
        # platformio.ini will accept this for a Linux upload port designation: 'upload_port = /media/media_name/drive'
        #
        upload_disk = 'Disk not found'
        target_file_found = False
        target_drive_found = False
        drives = os.listdir(os.path.join(os.sep, 'media', getpass.getuser()))
        if target_drive in drives:  # If target drive is found, use it.
            target_drive_found = True
            upload_disk = os.path.join(os.sep, 'media', getpass.getuser(), target_drive) + os.sep
        else:
            for drive in drives:
                try:
                    files = os.listdir(os.path.join(os.sep, 'media', getpass.getuser(), drive))
                except:
                    continue
                else:
                    if target_filename in files:
                        upload_disk = os.path.join(os.sep, 'media', getpass.getuser(), drive) + os.sep
                        target_file_found = True
                        break
        #
        # set upload_port to drive if found
        #

        if target_file_found or target_drive_found:
            env.Replace(
                UPLOAD_FLAGS="-P$UPLOAD_PORT",
                UPLOAD_PORT=upload_disk
            )
            print('upload disk: ', upload_disk)
        else:
            print_error('Autodetect Error')

    elif current_OS == 'Darwin':  # MAC
        #
        # platformio.ini will accept this for a OSX upload port designation: 'upload_port = /media/media_name/drive'
        #
        upload_disk = 'Disk not found'
        drives = os.listdir('/Volumes')  # human readable names
        target_file_found = False
        target_drive_found = False
        if target_drive in drives and target_file_found == False:  # set upload if not found target file yet
            target_drive_found = True
            upload_disk = '/Volumes/' + target_drive + '/'
        for drive in drives:
            try:
                filenames = os.listdir('/Volumes/' + drive + '/')   # will get an error if the drive is protected
            except:
                continue
            else:
                if target_filename in filenames:
                    if target_file_found == False:
                        upload_disk = '/Volumes/' + drive + '/'
                    target_file_found = True
        #
        # set upload_port to drive if found
        #

        if target_file_found == True or target_drive_found == True:
            env.Replace(
                UPLOAD_PORT=upload_disk
            )
            print('\nupload disk: ', upload_disk, '\n')
        else:
            print_error('Autodetect Error')

except Exception as e:
    print_error(str(e))