def _foo_impl(ctx):
  out = ctx.actions.declare_file(ctx.label.name)
  ctx.actions.write(
      output = out,
      content = "Hello!\n",
  )
  return [DefaultInfo(files = depset([out]))]

foo_binary = rule(
  implementation = _foo_impl,
)


def _bundle_impl(ctx):
  """
  bundle binary target into a folder which can later be used to make a post to github easily.
  """
  binary_target = ctx.attr.binary
  binary = binary_target[DefaultInfo].files.to_list()[0] # First files are binary
  runfiles_files = binary_target[DefaultInfo].default_runfiles.files.to_list() 

  # Name as output directory 
  out_dir = ctx.actions.declare_directory(ctx.label.name)

  copy_cmd = []
  copy_cmd.append("mkdir -p {}".format(out_dir.path))

  for f in runfiles_files:
    if f.path == binary.path:
      continue

    start = 0
    for directory in f.path.split("/"):
      if directory == binary.short_path.split("/")[0]:
        break
      print("\n\n equals: ", directory, binary.short_path.split("/")[0]);
      start += 1

    # Remove the first folder (output) and last file (actaul files that needed to be copied)
    paths = "/".join(f.path.split("/")[start:-1])
    full_path = "{}/{}".format(out_dir.path, paths)
    copy_cmd.append("mkdir -p {}".format(full_path))
    copy_cmd.append("cp {} {}".format(f.path, full_path))

  copy_cmd.append("cp {} {}".format(binary.path, out_dir.path))

  ctx.actions.run_shell(
    inputs = runfiles_files,
    outputs = [out_dir],
    command = " && ".join(copy_cmd),
    progress_message = "Bundling {}".format(ctx.label.name),
  )

  print("[INFO] See {}".format(out_dir.path))

  return [DefaultInfo(files = depset([out_dir]))]

bundle = rule(
  implementation = _bundle_impl,
  attrs = {
    "binary": attr.label(
      doc = "The cc_binary target to bundle",
      providers = [DefaultInfo],
    ),
  },
)


def _bun_binary_impl(ctx):
    out = ctx.actions.declare_file("bun")
    ctx.actions.run_shell(
      inputs = ctx.files.srcs,
      outputs = [out],
      command = """
        mkdir -p {outdir}
        unzip -j {src} {inner} -d {outdir}
        chmod +x {outdir}/bun
      """.format(
        outdir = out.dirname,
        src = ctx.files.srcs[0].path,
        inner = ctx.attr.src_folder,
        out = out.path,
      ),
    )
    return DefaultInfo(
      files = depset([out]),
      executable = out,
    )

bun_binary = rule(
    implementation = _bun_binary_impl,
    attrs = {
      "srcs": attr.label_list(allow_files=True),
      "src_folder": attr.string(),
    },
    executable = True,
)

def _bun_build_impl(ctx):
  """
  Run bun build on the folder

  This sucks because you need to either copy node module into the root folder where main.ts file
  exists or copy everything outwards. I chose to do it in this way.

  TODO: If possible, maybe create a node_module inside of the main target path and create a symlink
  TODO: Add a specific path for node_modules
  """
  out = ctx.actions.declare_file(ctx.label.name + ".js")
  inputs = [ctx.file.src] + ctx.files.data

  ctx.actions.run_shell(
    inputs = inputs,
    outputs = [out],
    tools = [ctx.executable._bun] + inputs, 
    command = """
      cp -r third_party/bun/** . \
      && cp -r {src_folder}/** .  \
      && export NODE_PATH=./node_modules && {bun_path} build {input_path} --outfile {output_path}
      """.format(
      bun_path = ctx.executable._bun.path,
      src_folder = ctx.attr.src_folder,
      input_path = ctx.file.src.path.split("/")[-1],
      output_path = out.path,
    ),
    progress_message = "Bundling {} with Bun!\n\n".format(ctx.file.src.path),
  )
  
  return [DefaultInfo(files=depset([out]))]

bun_build = rule(
  implementation = _bun_build_impl,
  attrs = {
    "src": attr.label(allow_single_file = [".ts", ".tsx", ".js", ".jsx"]),
    "_bun": attr.label(
        default = Label("//third_party/bun:bun"),
        executable = True,
        cfg = "exec",
    ),
    "data": attr.label_list(allow_files=True),
    "src_folder": attr.string(),
  },
)

def _move_files_into_dir_impl(ctx):
  srcs = ctx.files.srcs
  for src in srcs:
    out = ctx.actions.declare_file(ctx.attr.dest + "/" + src.basename)
    ctx.actions.symlink(
      output = out,
      target_file = src,
    )
  return [DefaultInfo(files = depset([out]))]

move_files_into_dir = rule(
  implementation = _move_files_into_dir_impl,
  attrs = {
    "srcs": attr.label_list(allow_files=True),
    "dest": attr.string(),
  },
)

def _move_to_directory_impl(ctx):
  srcs = ctx.files.data
  res = []
  for src in srcs:
    true = "/".join(src.path.split("/")[2:])
    path = ctx.attr.dest + "/" + true if ctx.attr.dest != "" else true
    out = ctx.actions.declare_file(
      path 
    );
    ctx.actions.symlink(
      output = out,
      target_file = src,
    )
    res.append(out)
  return [DefaultInfo(files = depset(res))]

move_to_directory = rule(
  implementation = _move_to_directory_impl,
  attrs = {
    "data": attr.label_list(allow_files=True),
    "dest": attr.string(),
  },
)