// Copyright 2019 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.

package build

import (
	"path/filepath"

	"go.fuchsia.dev/fuchsia/tools/lib/jsonutil"
)

const (
	imageManifestName = "images.json"
)

// Modules is a convenience interface for accessing the various build API
// modules associated with a build.
//
// For information about each build API module, see the corresponding
// `build_api_module` target in //BUILD.gn.
type Modules struct {
	buildDir           string
	apis               []string
	archives           []Archive
	args               Args
	binaries           []Binary
	checkoutArtifacts  []CheckoutArtifact
	generatedSources   []string
	images             []Image
	packageManifests   []string
	platforms          []DimensionSet
	prebuiltBinarySets []PrebuiltBinarySet
	sdkArchives        []SDKArchive
	testSpecs          []TestSpec
	testDurations      []TestDuration
	tools              Tools
	zbiTests           []ZBITest
}

// NewModules returns a Modules associated with a given build directory.
func NewModules(buildDir string) (*Modules, error) {
	m := &Modules{buildDir: buildDir}

	manifests := map[string]interface{}{
		"api.json":                        &m.apis,
		"archives.json":                   &m.archives,
		"args.json":                       &m.args,
		"binaries.json":                   &m.binaries,
		"checkout_artifacts.json":         &m.checkoutArtifacts,
		"generated_sources.json":          &m.generatedSources,
		imageManifestName:                 &m.images,
		"all_package_manifest_paths.json": &m.packageManifests,
		"platforms.json":                  &m.platforms,
		"prebuilt_binaries.json":          &m.prebuiltBinarySets,
		"sdk_archives.json":               &m.sdkArchives,
		"tests.json":                      &m.testSpecs,
		"test_durations.json":             &m.testDurations,
		"tool_paths.json":                 &m.tools,
		"zbi_tests.json":                  &m.zbiTests,
	}
	for manifest, dest := range manifests {
		path := filepath.Join(buildDir, manifest)
		if err := jsonutil.ReadFromFile(path, dest); err != nil {
			return nil, err
		}
	}
	return m, nil
}

// BuildDir returns the fuchsia build directory root.
func (m Modules) BuildDir() string {
	return m.buildDir
}

// ImageManifest returns the path to the images manifest.
func (m Modules) ImageManifest() string {
	return filepath.Join(m.BuildDir(), imageManifestName)
}

// APIs returns the build API module of available build API modules.
func (m Modules) APIs() []string {
	return m.apis
}

func (m Modules) Archives() []Archive {
	return m.archives
}

func (m Modules) Args() Args {
	return m.args
}

func (m Modules) Binaries() []Binary {
	return m.binaries
}

func (m Modules) CheckoutArtifacts() []CheckoutArtifact {
	return m.checkoutArtifacts
}

func (m Modules) GeneratedSources() []string {
	return m.generatedSources
}

func (m Modules) Images() []Image {
	return m.images
}

func (m Modules) PackageManifests() []string {
	return m.packageManifests
}

// Platforms returns the build API module of available platforms to test on.
func (m Modules) Platforms() []DimensionSet {
	return m.platforms
}

// PrebuiltBinarySets returns the build API module of prebuilt packages
// registered in the build.
func (m Modules) PrebuiltBinarySets() []PrebuiltBinarySet {
	return m.prebuiltBinarySets
}

func (m Modules) SDKArchives() []SDKArchive {
	return m.sdkArchives
}

func (m Modules) TestDurations() []TestDuration {
	return m.testDurations
}

func (m Modules) TestSpecs() []TestSpec {
	return m.testSpecs
}

func (m Modules) Tools() Tools {
	return m.tools
}

func (m Modules) ZBITests() []ZBITest {
	return m.zbiTests
}