set (SAMPLE_FILES
  JT9+JT65/130610_2343.wav
  JT9/130418_1742.wav
  )

#set_directory_properties (PROPERTIES EXCLUDE_FROM_ALL ON)

set (contents_file_ ${CMAKE_CURRENT_BINARY_DIR}/contents_${WSJTX_VERSION_MAJOR}.${WSJTX_VERSION_MINOR}.json)

function (indent_)
  foreach (temp_ RANGE ${level_})
    file (APPEND ${contents_file_} "  ")
  endforeach ()
endfunction ()

function (end_entry_)
  file (APPEND ${contents_file_} "\n")
  set(first_ 0 PARENT_SCOPE)
  math (EXPR level_ "${level_} - 1")
  indent_ ()
  file (APPEND ${contents_file_} "]\n")
  math (EXPR level_ "${level_} - 2")
  indent_ ()
  file (APPEND ${contents_file_} "}")
  string (FIND "${dirs_}" "${cwd_}" pos_)
  set (level_ ${level_} PARENT_SCOPE)
endfunction ()

file (WRITE ${contents_file_} "[")

set (cwd_)
set (level_ 0)
set (first_ 1)
list (SORT SAMPLE_FILES)
foreach (sample_ IN LISTS SAMPLE_FILES)
  string (REGEX MATCHALL "[^/]*/" dirs_ "${sample_}")
  string (REPLACE "/" "" dirs_ "${dirs_}")
  string (REGEX MATCH "[^/]*$" name_ "${sample_}")
  string (FIND "${dirs_}" "${cwd_}" pos_)
  list (LENGTH cwd_ cwd_count_)
  if (${pos_} EQUAL 0)
    # same root
    while (${cwd_count_} GREATER 0)
      list (REMOVE_AT dirs_ 0)
      math (EXPR cwd_count_ "${cwd_count_} - 1")
    endwhile ()
  else ()
    # reduce cwd_ until matched
    while ((NOT ${pos_} EQUAL 0) AND ${cwd_count_} GREATER 0)
      math (EXPR cwd_count_ "${cwd_count_} - 1")
      list (REMOVE_AT cwd_ ${cwd_count_})
      end_entry_ ()
    endwhile ()
    # back to same root
    while (${cwd_count_} GREATER 0)
      list (REMOVE_AT dirs_ 0)
      math (EXPR cwd_count_ "${cwd_count_} - 1")
    endwhile ()
  endif ()
  list (LENGTH cwd_ cwd_count_)
  list (LENGTH dirs_ path_count_)
  while (${path_count_} GREATER 0)
    list (GET dirs_ 0 dir_)
    list (APPEND cwd_ "${dir_}")
    list (REMOVE_AT dirs_ 0)
    if (${first_})
      file (APPEND ${contents_file_} "\n")
      set (first 0)
    else ()
      file (APPEND ${contents_file_} ",\n")
    endif ()
    indent_ ()
    file (APPEND ${contents_file_} "{\n")
    math (EXPR level_ "${level_} + 1")
    indent_ ()
    file (APPEND ${contents_file_} "\"type\": \"directory\",\n")
    indent_ ()
    file (APPEND ${contents_file_} "\"name\":  \"${dir_}\",\n")
    indent_ ()
    file (APPEND ${contents_file_} "\"entries\": [")
    set (first_ 1)
    math (EXPR level_ "${level_} + 2")
    math (EXPR path_count_ "${path_count_} - 1")
  endwhile ()
  file (COPY ${sample_} DESTINATION web/samples/${cwd_})
  if (${first_})
    file (APPEND ${contents_file_} "\n")
    set (first 0)
  else ()
    file (APPEND ${contents_file_} ",\n")
  endif ()
  indent_ ()
  file (APPEND ${contents_file_} "{\n")
  math (EXPR level_ "${level_} + 1")
  indent_ ()
  file (APPEND ${contents_file_} "\"type\": \"file\",\n")
  indent_ ()
  file (APPEND ${contents_file_} "\"name\": \"${name_}\"\n")
  math (EXPR level_ "${level_} - 1")
  indent_ ()
  file (APPEND ${contents_file_} "}")
  set (first_ 0)
endforeach ()
if (${level_} GREATER 1)
  end_entry_ ()
endif ()

file (APPEND ${contents_file_} "\n]\n")

file (COPY ${contents_file_} DESTINATION web/samples)

find_program (RSYNC_EXECUTABLE rsync)
if (RSYNC_EXECUTABLE)
  add_custom_command (
    OUTPUT upload.timestamp
    COMMAND ${RSYNC_EXECUTABLE} ARGS -avz ${CMAKE_CURRENT_BINARY_DIR}/web/samples ${PROJECT_SAMPLES_UPLOAD_DEST}
    COMMAND ${CMAKE_COMMAND} ARGS touch upload.timestamp
    DEPENDS ${contents_file_} ${SAMPLE_FILES}
    COMMENT "Uploading WSJT-X samples to web server"
    )
  add_custom_target (upload-samples DEPENDS upload.timestamp)
endif ()