# Copyright (C) 2018 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import("../gn/perfetto.gni")
import("../gn/wasm.gni")
import("../protos/perfetto/trace_processor/proto_files.gni")

# Prevent that this file is accidentally included in embedder builds.
assert(enable_perfetto_ui)

ui_dir = "$root_build_dir/ui"
chrome_extension_dir = "$root_build_dir/chrome_extension"
ui_gen_dir = "$target_out_dir/gen"
nodejs_root = "../buildtools/nodejs"
nodejs_bin = rebase_path("$nodejs_root/bin", root_build_dir)

# +----------------------------------------------------------------------------+
# | The outer "ui" target to just ninja -C out/xxx ui                          |
# +----------------------------------------------------------------------------+

group("ui") {
  deps = [
    ":chrome_extension_assets_dist",
    ":chrome_extension_bundle_dist",
    ":dist",
    ":gen_dist_file_map",
    ":service_worker_bundle_dist",
    ":test_scripts",

    # IMPORTANT: Only add deps here if they are NOT part of the production UI
    # (e.g., tests, extensions, ...). Any UI dep should go in the
    # |ui_dist_targets| list below. The only exception is the service worker
    # target, that depends on that list.
  ]
}

# The list of targets that produces dist/ files for the UI. This list is used
# also by the gen_dist_file_map to generate the map of hashes of all UI files,
# which is turn used by the service worker code for the offline caching.
ui_dist_targets = [
  ":assets_dist",
  ":catapult_dist",
  ":controller_bundle_dist",
  ":engine_bundle_dist",
  ":frontend_bundle_dist",
  ":index_dist",
  ":scss",
  ":typefaces_dist",
  ":wasm_dist",
]

# Buils the ui, but not service worker, tests and extensions.
group("dist") {
  deps = ui_dist_targets
}

# A minimal page to profile the WASM engine without the all UI.
group("query") {
  deps = [
    ":query_bundle_dist",
    ":query_dist",
    ":ui",
  ]
}

# +----------------------------------------------------------------------------+
# | Template used to run node binaries using the hermetic node toolchain.      |
# +----------------------------------------------------------------------------+
template("node_bin") {
  action(target_name) {
    forward_variables_from(invoker,
                           [
                             "inputs",
                             "outputs",
                             "depfile",
                           ])
    deps = [ ":node_modules" ]
    if (defined(invoker.deps)) {
      deps += invoker.deps
    }
    script = "../gn/standalone/build_tool_wrapper.py"
    _node_cmd = invoker.node_cmd
    args = []
    if (defined(invoker.suppress_stdout) && invoker.suppress_stdout) {
      args += [ "--suppress_stdout" ]
    }
    if (defined(invoker.suppress_stderr) && invoker.suppress_stderr) {
      args += [ "--suppress_stderr" ]
    }
    args += [
              "--path=$nodejs_bin",
              "node",
              rebase_path("node_modules/.bin/$_node_cmd", root_build_dir),
            ] + invoker.args
  }
}

# +----------------------------------------------------------------------------+
# | Template for "sorcery" the source map resolver.                            |
# +----------------------------------------------------------------------------+
template("sorcery") {
  node_bin(target_name) {
    assert(defined(invoker.input))
    assert(defined(invoker.output))
    forward_variables_from(invoker, [ "deps" ])
    inputs = [ invoker.input ]
    outputs = [
      invoker.output,
      invoker.output + ".map",
    ]
    node_cmd = "sorcery"
    args = [
      "-i",
      rebase_path(invoker.input, root_build_dir),
      "-o",
      rebase_path(invoker.output, root_build_dir),
    ]
  }
}

# +----------------------------------------------------------------------------+
# | Template for bundling js                                                   |
# +----------------------------------------------------------------------------+
template("bundle") {
  node_bin(target_name) {
    assert(defined(invoker.input))
    assert(defined(invoker.output))
    forward_variables_from(invoker, [ "deps" ])
    inputs = [
      invoker.input,
      "rollup.config.js",
    ]
    outputs = [
      invoker.output,
      invoker.output + ".map",
    ]
    node_cmd = "rollup"
    args = [
      "-c",
      rebase_path("rollup.config.js", root_build_dir),
      rebase_path(invoker.input, root_build_dir),
      "-o",
      rebase_path(invoker.output, root_build_dir),
      "-f",
      "iife",
      "-m",
      "--silent",
    ]
  }
}

# +----------------------------------------------------------------------------+
# | Bundles all *.js files together resolving CommonJS require() deps.         |
# +----------------------------------------------------------------------------+

# Bundle together all js sources into a bundle.js file, that will ultimately be
# included by the .html files.

bundle("frontend_bundle") {
  deps = [ ":transpile_all_ts" ]
  input = "$target_out_dir/frontend/index.js"
  output = "$target_out_dir/frontend_bundle.js"
}

bundle("chrome_extension_bundle") {
  deps = [ ":transpile_all_ts" ]
  input = "$target_out_dir/chrome_extension/index.js"
  output = "$target_out_dir/chrome_extension_bundle.js"
}

bundle("controller_bundle") {
  deps = [ ":transpile_all_ts" ]
  input = "$target_out_dir/controller/index.js"
  output = "$target_out_dir/controller_bundle.js"
}

bundle("engine_bundle") {
  deps = [ ":transpile_all_ts" ]
  input = "$target_out_dir/engine/index.js"
  output = "$target_out_dir/engine_bundle.js"
}

bundle("service_worker_bundle") {
  deps = [ ":transpile_service_worker_ts" ]
  input = "$target_out_dir/service_worker/service_worker.js"
  output = "$target_out_dir/service_worker.js"
}

bundle("query_bundle") {
  deps = [ ":transpile_all_ts" ]
  input = "$target_out_dir/query/index.js"
  output = "$target_out_dir/query_bundle.js"
}

# +----------------------------------------------------------------------------+
# | Protobuf: gen rules to create .js and .d.ts files from protos.             |
# +----------------------------------------------------------------------------+
node_bin("protos_to_js") {
  inputs = []
  foreach(proto, trace_processor_protos) {
    inputs += [ "../protos/perfetto/trace_processor/$proto.proto" ]
  }
  inputs += [
    "../protos/perfetto/config/perfetto_config.proto",
    "../protos/perfetto/ipc/consumer_port.proto",
    "../protos/perfetto/ipc/wire_protocol.proto",
  ]
  outputs = [ "$ui_gen_dir/protos.js" ]
  node_cmd = "pbjs"
  args = [
           "-t",
           "static-module",
           "-w",
           "commonjs",
           "-p",
           rebase_path("..", root_build_dir),
           "-o",
           rebase_path(outputs[0], root_build_dir),
         ] + rebase_path(inputs, root_build_dir)
}

# Protobuf.js requires to first generate .js files from the .proto and then
# create .ts definitions for them.
node_bin("protos_to_ts") {
  deps = [ ":protos_to_js" ]
  inputs = [ "$ui_gen_dir/protos.js" ]
  outputs = [ "$ui_gen_dir/protos.d.ts" ]
  node_cmd = "pbts"
  args = [
    "-p",
    rebase_path("..", root_build_dir),
    "-o",
    rebase_path(outputs[0], root_build_dir),
    rebase_path(inputs[0], root_build_dir),
  ]
}

# +----------------------------------------------------------------------------+
# | TypeScript: transpiles all *.ts into .js                                   |
# +----------------------------------------------------------------------------+

# Builds all .ts sources in the repo under |src|.
node_bin("transpile_all_ts") {
  deps = [
    ":dist_symlink",
    ":protos_to_ts",
    ":wasm_gen",
  ]
  inputs = [ "tsconfig.json" ]
  outputs = [
    "$target_out_dir/frontend/index.js",
    "$target_out_dir/engine/index.js",
    "$target_out_dir/controller/index.js",
    "$target_out_dir/query/index.js",
    "$target_out_dir/chrome_extension/index.js",
  ]

  depfile = root_out_dir + "/tsc.d"
  exec_script("../gn/standalone/glob.py",
              [
                "--root=" + rebase_path(".", root_build_dir),
                "--filter=*.ts",
                "--exclude=node_modules",
                "--exclude=dist",
                "--exclude=service_worker",
                "--deps=obj/ui/frontend/index.js",
                "--output=" + rebase_path(depfile),
              ],
              "")

  node_cmd = "tsc"
  args = [
    "--project",
    rebase_path(".", root_build_dir),
    "--outDir",
    rebase_path(target_out_dir, root_build_dir),
  ]
}

node_bin("transpile_service_worker_ts") {
  deps = [
    ":dist_symlink",
    ":gen_dist_file_map",
  ]
  inputs = [
    "tsconfig.json",
    "src/service_worker/service_worker.ts",
  ]
  outputs = [ "$target_out_dir/service_worker/service_worker.js" ]

  node_cmd = "tsc"
  args = [
    "--project",
    rebase_path("src/service_worker", root_build_dir),
    "--outDir",
    rebase_path(target_out_dir, root_build_dir),
  ]
}

# +----------------------------------------------------------------------------+
# | Build css.                                                                 |
# +----------------------------------------------------------------------------+

scss_root = "src/assets/perfetto.scss"
scss_srcs = [
  "src/assets/typefaces.scss",
  "src/assets/sidebar.scss",
  "src/assets/topbar.scss",
  "src/assets/record.scss",
  "src/assets/common.scss",
  "src/assets/modal.scss",
  "src/assets/details.scss",
]

# Build css.
node_bin("scss") {
  deps = [ ":dist_symlink" ]
  inputs = [ scss_root ] + scss_srcs
  outputs = [ "$ui_dir/perfetto.css" ]

  node_cmd = "node-sass"
  args = [
    "--quiet",
    rebase_path(scss_root, root_build_dir),
    rebase_path(outputs[0], root_build_dir),
  ]
}

# +----------------------------------------------------------------------------+
# | Copy rules: create the final output directory.                             |
# +----------------------------------------------------------------------------+
copy("index_dist") {
  sources = [ "index.html" ]
  outputs = [ "$ui_dir/index.html" ]
}

copy("typefaces_dist") {
  sources = [
    "../buildtools/typefaces/MaterialIcons.woff2",
    "../buildtools/typefaces/Raleway-Regular.woff2",
    "../buildtools/typefaces/Raleway-Thin.woff2",
    "../buildtools/typefaces/RobotoCondensed-Light.woff2",
    "../buildtools/typefaces/RobotoCondensed-Regular.woff2",
    "../buildtools/typefaces/RobotoMono-Regular.woff2",
  ]

  outputs = [ "$ui_dir/assets/{{source_file_part}}" ]
}

copy("query_dist") {
  sources = [ "query.html" ]
  outputs = [ "$ui_dir/query.html" ]
}

copy("assets_dist") {
  sources = [
              "src/assets/heap_profiler.png",
              "src/assets/logo-3d.png",
              "src/assets/logo.png",
              "src/assets/rec_atrace.png",
              "src/assets/rec_battery_counters.png",
              "src/assets/rec_board_voltage.png",
              "src/assets/rec_cpu_coarse.png",
              "src/assets/rec_cpu_fine.png",
              "src/assets/rec_cpu_freq.png",
              "src/assets/rec_cpu_voltage.png",
              "src/assets/rec_cpu_wakeup.png",
              "src/assets/rec_ftrace.png",
              "src/assets/rec_lmk.png",
              "src/assets/rec_logcat.png",
              "src/assets/rec_long_trace.png",
              "src/assets/rec_mem_hifreq.png",
              "src/assets/rec_meminfo.png",
              "src/assets/rec_one_shot.png",
              "src/assets/rec_ps_stats.png",
              "src/assets/rec_ring_buf.png",
              "src/assets/rec_vmstat.png",
            ] + [ scss_root ] + scss_srcs
  outputs = [ "$ui_dir/assets/{{source_file_part}}" ]
}
copy("chrome_extension_assets_dist") {
  sources = [
    "src/assets/logo-128.png",
    "src/assets/logo.png",
    "src/chrome_extension/manifest.json",
  ]
  outputs = [ "$chrome_extension_dir/{{source_file_part}}" ]
}

sorcery("frontend_bundle_dist") {
  deps = [ ":frontend_bundle" ]
  input = "$target_out_dir/frontend_bundle.js"
  output = "$ui_dir/frontend_bundle.js"
}

sorcery("chrome_extension_bundle_dist") {
  deps = [ ":chrome_extension_bundle" ]
  input = "$target_out_dir/chrome_extension_bundle.js"
  output = "$chrome_extension_dir/chrome_extension_bundle.js"
}

sorcery("controller_bundle_dist") {
  deps = [ ":controller_bundle" ]
  input = "$target_out_dir/controller_bundle.js"
  output = "$ui_dir/controller_bundle.js"
}

sorcery("engine_bundle_dist") {
  deps = [ ":engine_bundle" ]
  input = "$target_out_dir/engine_bundle.js"
  output = "$ui_dir/engine_bundle.js"
}

sorcery("service_worker_bundle_dist") {
  deps = [ ":service_worker_bundle" ]
  input = "$target_out_dir/service_worker.js"
  output = "$ui_dir/service_worker.js"
}

sorcery("query_bundle_dist") {
  deps = [ ":query_bundle" ]
  input = "$target_out_dir/query_bundle.js"
  output = "$ui_dir/query_bundle.js"
}

copy("wasm_dist") {
  deps = [
    "//src/trace_processor:trace_processor.wasm($wasm_toolchain)",
    "//tools/trace_to_text:trace_to_text.wasm($wasm_toolchain)",
  ]
  sources = [
    "$root_build_dir/wasm/trace_processor.wasm",
    "$root_build_dir/wasm/trace_to_text.wasm",
  ]
  outputs = [ "$ui_dir/{{source_file_part}}" ]
}

copy("wasm_gen") {
  deps = [
    ":dist_symlink",

    # trace_processor
    "//src/trace_processor:trace_processor.d.ts($wasm_toolchain)",
    "//src/trace_processor:trace_processor.js($wasm_toolchain)",
    "//src/trace_processor:trace_processor.wasm($wasm_toolchain)",

    # trace_to_text
    "//tools/trace_to_text:trace_to_text.d.ts($wasm_toolchain)",
    "//tools/trace_to_text:trace_to_text.js($wasm_toolchain)",
    "//tools/trace_to_text:trace_to_text.wasm($wasm_toolchain)",
  ]
  sources = [
    # trace_processor
    "$root_build_dir/wasm/trace_processor.d.ts",
    "$root_build_dir/wasm/trace_processor.js",
    "$root_build_dir/wasm/trace_processor.wasm",

    # trace_to_text
    "$root_build_dir/wasm/trace_to_text.d.ts",
    "$root_build_dir/wasm/trace_to_text.js",
    "$root_build_dir/wasm/trace_to_text.wasm",
  ]
  if (is_debug) {
    sources += [
      "$root_build_dir/wasm/trace_processor.wasm.map",
      "$root_build_dir/wasm/trace_to_text.wasm.map",
    ]
  }
  outputs = [ "$ui_gen_dir/{{source_file_part}}" ]
}

# Copy over the vulcanized legacy trace viewer.
copy("catapult_dist") {
  sources = [
    "../buildtools/catapult_trace_viewer/catapult_trace_viewer.html",
    "../buildtools/catapult_trace_viewer/catapult_trace_viewer.js",
  ]
  outputs = [ "$ui_dir/assets/{{source_file_part}}" ]
}

# +----------------------------------------------------------------------------+
# | Node JS: Creates a symlink in the out directory to node_modules.           |
# +----------------------------------------------------------------------------+

action("check_node_exists") {
  script = "../gn/standalone/check_buildtool_exists.py"
  args = [
    nodejs_bin,
    "--touch",
    rebase_path("$target_out_dir/node_exists", ""),
  ]
  inputs = []
  outputs = [ "$target_out_dir/node_exists" ]
}

# Creates a symlink from out/xxx/ui/node_modules -> ../../../ui/node_modules.
# This allows to run rollup and other node tools from the out/xxx directory.
action("node_modules_symlink") {
  deps = [ ":check_node_exists" ]

  script = "../gn/standalone/build_tool_wrapper.py"
  stamp_file = "$target_out_dir/.$target_name.stamp"
  args = [
    "--stamp",
    rebase_path(stamp_file, root_build_dir),
    "/bin/ln",
    "-fns",
    rebase_path("node_modules", target_out_dir),
    rebase_path("$target_out_dir/node_modules", root_build_dir),
  ]
  outputs = [ stamp_file ]
}

group("node_modules") {
  deps = [ ":node_modules_symlink" ]
}

# Creates a symlink from //ui/dist -> ../../out/xxx/ui. Used only for
# autocompletion in IDEs. The problem this is solving is that in tsconfig.json
# we can't possibly know the path to ../../out/xxx for outDir. Instead, we set
# outDir to "./dist" and create a symlink on the first build.
action("dist_symlink") {
  script = "../gn/standalone/build_tool_wrapper.py"
  stamp_file = "$target_out_dir/.$target_name.stamp"
  args = [
    "--stamp",
    rebase_path(stamp_file, root_build_dir),
    "/bin/ln",
    "-fns",
    rebase_path(target_out_dir, "."),
    rebase_path("dist", root_build_dir),
  ]
  inputs = [ "$root_build_dir" ]
  outputs = [ stamp_file ]
}

group("test_scripts") {
  deps = [
    ":copy_tests_script",
    ":copy_unittests_script",
  ]
}

copy("copy_unittests_script") {
  sources = [ "config/ui_unittests_template" ]
  outputs = [ "$root_build_dir/ui_unittests" ]
}

copy("copy_tests_script") {
  sources = [ "config/ui_tests_template" ]
  outputs = [ "$root_build_dir/ui_tests" ]
}

# This target generates an map containing all the UI subresources and their
# hashes. This is used by the service worker code for offline caching.
# This taarget needs to be kept at the end of the BUILD.gn file, because of the
# get_target_outputs() call (fails otherwise due to GN's evaluation order).
action("gen_dist_file_map") {
  out_file_path = "$ui_gen_dir/dist_file_map.ts"

  dist_files = []
  foreach(target, ui_dist_targets) {
    foreach(dist_file, get_target_outputs(target)) {
      dist_files += [ rebase_path(dist_file, root_build_dir) ]
    }
  }
  deps = [ ":dist" ]
  script = "../gn/standalone/write_ui_dist_file_map.py"
  inputs = []
  outputs = [ out_file_path ]
  args = [
           "--out",
           rebase_path(out_file_path, root_build_dir),
           "--strip",
           rebase_path(ui_dir, root_build_dir),
         ] + dist_files
}