# Copyright 2021 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import("//build/info/info.gni")
import("//build/json/validate_json.gni")
import("//build/product.gni")

# Generates a physical device manifest and product bundle metadata JSON files.
#
# The template uses the product and board definitions to populate some values.
#
# Parameters
#
#   devices(required)
#     A list of device names or identifiers this product may be installed on.
#
#   emu_manifest(optional)
#     Emulator manifest
#     See //build/sdk/meta/emu_manifest.json
#
#   flash_manifest(optional)
#     Flash manifest
#     See //build/sdk/meta/flash_manifest-835e8f26.json
#
#   deps (optional)
#   public_deps (optional)
#   testonly (optional)
#   visibility (optional)
#     Standard GN meaning.
template("product_metadata") {
  assert(defined(invoker.devices), "Devices names are required.")

  # All the paths are relative to the generated metadata json.
  amber_files = rebase_path("$root_build_dir/amber-files", target_gen_dir)
  image_base = rebase_path("$root_build_dir", target_gen_dir)

  # This is the most recent schema.
  schema_file = "product_bundle-6320eef1.json"
  schema_target = "//build/sdk/meta/${schema_file}"

  # Schema ID must match the id field in the schema file.
  schema_id = "http://fuchsia.com/schemas/sdk/${schema_file}"

  product_name = "${build_info_product}.${build_info_board}"

  file_contents = {
    schema_id = schema_id
    data = {
      type = "product_bundle"
      name = product_name
      description = product_description
      device_refs = invoker.devices
      metadata = [
        [
          "build_info_board",
          build_info_board,
        ],
        [
          "build_info_product",
          build_info_product,
        ],
        [
          "build_info_version",
          build_info_version,
        ],
        [
          "is_debug",
          is_debug,
        ],
      ]
      packages = [
        {
          format = "files"
          repo_uri = "file:/$amber_files"
        },
      ]
      images = [
        {
          format = "files"
          base_uri = "file:/$image_base"
        },
      ]
      manifests = {
        if (defined(invoker.emu_manifest)) {
          emu = invoker.emu_manifest
        }
        if (defined(invoker.flash_manifest)) {
          flash = invoker.flash_manifest
        }
      }
    }
  }

  file = "$target_gen_dir/product_bundle.json"
  generator_target = "${target_name}_json_generator"
  generated_file(generator_target) {
    visibility = [ ":*" ]
    forward_variables_from(invoker, [ "testonly" ])
    contents = file_contents
    output_conversion = "json"
    outputs = [ file ]
    metadata = {
      images = [
        {
          label = get_label_info(":$target_name", "label_with_toolchain")
          name = "product_bundle"
          path = rebase_path(file, root_build_dir)
          type = "manifest"
        },
      ]
    }
  }

  validator_target = "${target_name}_json_validator"
  validate_json(validator_target) {
    visibility = [ ":*" ]
    forward_variables_from(invoker, [ "testonly" ])
    data = file
    deps = [ ":${generator_target}" ]
    schema = schema_target
    sources = [
      # Included schemata.
      "//build/sdk/meta/common.json",
      "//build/sdk/meta/emu_manifest.json",
      "//build/sdk/meta/flash_manifest-835e8f26.json",
    ]
    allow_comments = true
  }

  # TODO(https://fxbug.dev/82728): Add path validation.

  group(target_name) {
    forward_variables_from(invoker,
                           [
                             "testonly",
                             "visibility",
                           ])
    deps = [
      ":${generator_target}",
      ":${validator_target}",
    ]

    if (defined(invoker.deps)) {
      deps += invoker.deps
    }
  }
}