import("//third_party/protobuf/proto_library.gni")
import("//v8/gni/v8.gni")
import("//v8/snapshot_toolchain.gni")

executable("deno") {
  sources = [
    "main.cc",
  ]
  deps = [
    ":libdeno",
    ":msg_proto",
    "//third_party/protobuf:protoc_lib",
  ]
  public_configs = [ ":public_v8_base_config" ]
}

executable("mock_runtime_test") {
  testonly = true
  sources = [
    "file_util_test.cc",
    "from_snapshot.cc",
    "mock_runtime_test.cc",
  ]
  deps = [
    ":create_snapshot_mock_runtime",
    ":deno_nosnapshot",
    "//testing/gtest:gtest",
  ]
  include_dirs = [ target_gen_dir ]
  defines = [ "DENO_MOCK_RUNTIME" ]
}

static_library("libdeno") {
  complete_static_lib = true
  sources = [
    "from_snapshot.cc",
  ]
  deps = [
    ":create_snapshot_deno",
    ":deno_nosnapshot",
  ]
}

source_set("deno_nosnapshot") {
  sources = [
    "deno.cc",
    "deno_internal.h",
    "file_util.cc",
    "file_util.h",
    "include/deno.h",
  ]
  deps = [
    "v8:v8",
    "v8:v8_libbase",
    "v8:v8_libplatform",
    "v8:v8_libsampler",
  ]
  public_configs = [
    "v8:libplatform_config",
    ":public_v8_base_config",
  ]
}

# This allows us to v8/src/base/ libraries.
config("public_v8_base_config") {
  include_dirs = [
    "v8",
    "$target_gen_dir/v8",
  ]
}

executable("snapshot_creator") {
  sources = [
    "snapshot_creator.cc",
  ]
  deps = [
    ":deno_nosnapshot",
  ]
}

proto_library("msg_proto") {
  sources = [
    "msg.proto",
  ]
  generate_python = false
}

template("run_node") {
  action(target_name) {
    forward_variables_from(invoker, "*")
    script = "js/run_node.py"
  }
}

run_node("bundle") {
  out_dir = "$target_gen_dir/bundle/"
  sources = [
    "js/main.ts",
    "js/msg.pb.d.ts",
    "js/msg.pb.js",
    "js/package.json",  # The `browserslist` field controls Babel behavior.
  ]
  outputs = [
    out_dir + "main.js",
  ]
  deps = [
    ":protobufjs",
    ":run_tsc",
  ]
  args = [
    "./node_modules/parcel-bundler/bin/cli.js",
    "build",
    "--no-minify",
    "--out-dir",
    rebase_path(out_dir, root_build_dir),
    rebase_path("js/main.ts", root_build_dir),
  ]
}

# Due to bugs in Parcel we must run TSC independently in order to catch errors.
# https://github.com/parcel-bundler/parcel/issues/954
run_node("run_tsc") {
  main = "js/main.ts"
  tsconfig = "js/tsconfig.json"
  out_dir = "$target_gen_dir/tsc_dist/"
  sources = [
    "js/msg.pb.d.ts",
    "js/msg.pb.js",
    main,
    tsconfig,
  ]
  outputs = [
    out_dir + "/main.js",
  ]
  deps = [
    ":protobufjs",
  ]
  args = [
    "./node_modules/typescript/bin/tsc",
    "--project",
    rebase_path(tsconfig, root_build_dir),
    "--outDir",
    rebase_path(out_dir, root_build_dir),
  ]
}

# Generates protobufjs code.
# TODO(ry) Ideally protobufjs output files should be written into
# target_gen_dir, but its difficult to get this working in a way that the
# bundler can resolve their location. (The bundler does not support NODE_PATH?)
# Therefore this hack: write the generated msg.pb.js and msg.pb.d.ts outputs
# into the js/ folder, and we check them into the repo. Hopefully this hack can
# be removed at some point. If msg.proto is changed, commit changes to the
# generated JS files. The stamp file is just to make gn work.
action("protobufjs") {
  script = "js/pbjs_hack.py"
  sources = [
    "msg.proto",
  ]
  outputs = [
    "$target_gen_dir/pbjs_hack.stamp",
  ]
  args = [
    rebase_path(sources[0], root_build_dir),
    rebase_path(outputs[0], root_build_dir),
  ]
}

# Template to generate different V8 snapshots based on different runtime flags.
# Can be invoked with run_mksnapshot(<name>). The target will resolve to
# run_mksnapshot_<name>. If <name> is "default", no file suffixes will be used.
# Otherwise files are suffixed, e.g. embedded_<name>.cc and
# snapshot_blob_<name>.bin.
#
# The template exposes the variables:
#   args: additional flags for mksnapshots
#   embedded_suffix: a camel case suffix for method names in the embedded
#       snapshot.
template("create_snapshot") {
  name = target_name
  suffix = "_$name"
  action("create_snapshot_" + name) {
    forward_variables_from(invoker,
                           [
                             "testonly",
                             "deps",
                           ])
    visibility = [ ":*" ]  # Only targets in this file can depend on this.
    deps += [ ":snapshot_creator" ]
    script = "v8/tools/run.py"
    data = []
    exe = rebase_path(get_label_info(":snapshot_creator", "root_out_dir") +
                      "/snapshot_creator")
    natives_in_bin = "$root_out_dir/natives_blob.bin"
    snapshot_in_bin = "$root_out_dir/snapshot_blob.bin"
    natives_out_cc = "$target_gen_dir/natives${suffix}.cc"
    snapshot_out_cc = "$target_gen_dir/snapshot${suffix}.cc"
    sources = [
      invoker.js,
    ]
    outputs = [
      natives_out_cc,
      snapshot_out_cc,
    ]
    args = [
      exe,
      rebase_path(invoker.js, root_build_dir),
      rebase_path(natives_in_bin, root_build_dir),
      rebase_path(snapshot_in_bin, root_build_dir),
      rebase_path(natives_out_cc, root_build_dir),
      rebase_path(snapshot_out_cc, root_build_dir),
    ]

    # To debug snapshotting problems:
    #  args += ["--trace-serializer"]
    data = [
      invoker.js,
    ]
  }
}

# Generates $target_gen_dir/snapshot_deno.cc
create_snapshot("deno") {
  js = "$target_gen_dir/bundle/main.js"
  deps = [
    ":bundle",
  ]
}

# Generates $target_gen_dir/snapshot_mock_runtime.cc
create_snapshot("mock_runtime") {
  testonly = true
  js = "js/mock_runtime.js"
  deps = []
}