// Copyright 2021 Google Inc. All rights reserved.
//
// 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.

package java

import (
	"fmt"
	"reflect"
	"regexp"
	"strings"
	"testing"

	"android/soong/android"

	"github.com/google/blueprint/proptools"
)

func TestDroidstubs(t *testing.T) {
	ctx, _ := testJavaWithFS(t, `
		droiddoc_exported_dir {
			name: "droiddoc-templates-sdk",
			path: ".",
		}

		droidstubs {
			name: "bar-stubs",
			srcs: ["bar-doc/a.java"],
			api_levels_annotations_dirs: ["droiddoc-templates-sdk"],
			api_levels_annotations_enabled: true,
		}

		droidstubs {
			name: "bar-stubs-other",
			srcs: ["bar-doc/a.java"],
			high_mem: true,
			api_levels_annotations_dirs: ["droiddoc-templates-sdk"],
			api_levels_annotations_enabled: true,
			api_levels_jar_filename: "android.other.jar",
		}

		droidstubs {
			name: "stubs-applying-api-versions",
			srcs: ["bar-doc/a.java"],
			api_levels_module: "bar-stubs-other",
		}
		`,
		map[string][]byte{
			"bar-doc/a.java": nil,
		})
	testcases := []struct {
		moduleName          string
		expectedJarFilename string
		generate_xml        bool
		high_mem            bool
	}{
		{
			moduleName:          "bar-stubs",
			generate_xml:        true,
			expectedJarFilename: "android.jar",
			high_mem:            false,
		},
		{
			moduleName:          "bar-stubs-other",
			generate_xml:        true,
			expectedJarFilename: "android.other.jar",
			high_mem:            true,
		},
		{
			moduleName:   "stubs-applying-api-versions",
			generate_xml: false,
		},
	}
	for _, c := range testcases {
		m := ctx.ModuleForTests(c.moduleName, "android_common")
		manifest := m.Output("metalava.sbox.textproto")
		sboxProto := android.RuleBuilderSboxProtoForTests(t, manifest)
		cmdline := String(sboxProto.Commands[0].Command)
		android.AssertStringContainsEquals(t, "api-versions generation flag", cmdline, "--generate-api-levels", c.generate_xml)
		if c.expectedJarFilename != "" {
			expected := "--android-jar-pattern ./%/public/" + c.expectedJarFilename
			if !strings.Contains(cmdline, expected) {
				t.Errorf("For %q, expected metalava argument %q, but was not found %q", c.moduleName, expected, cmdline)
			}
		}

		metalava := m.Rule("metalava")
		rp := metalava.RuleParams
		if actual := rp.Pool != nil && strings.Contains(rp.Pool.String(), "highmem"); actual != c.high_mem {
			t.Errorf("Expected %q high_mem to be %v, was %v", c.moduleName, c.high_mem, actual)
		}
	}
}

// runs a test for droidstubs with a customizable sdkType argument and returns
// the list of jar patterns that is passed as `--android-jar-pattern`
func getAndroidJarPatternsForDroidstubs(t *testing.T, sdkType string) []string {
	ctx, _ := testJavaWithFS(t, fmt.Sprintf(`
		droiddoc_exported_dir {
			name: "some-exported-dir",
			path: "somedir",
		}

		droiddoc_exported_dir {
			name: "some-other-exported-dir",
			path: "someotherdir",
		}

		droidstubs {
			name: "foo-stubs",
			srcs: ["foo-doc/a.java"],
			api_levels_annotations_dirs: [
				"some-exported-dir",
				"some-other-exported-dir",
			],
			api_levels_annotations_enabled: true,
			api_levels_sdk_type: "%s",
		}
		`, sdkType),
		map[string][]byte{
			"foo-doc/a.java": nil,
		})

	m := ctx.ModuleForTests("foo-stubs", "android_common")
	manifest := m.Output("metalava.sbox.textproto")
	cmd := String(android.RuleBuilderSboxProtoForTests(t, manifest).Commands[0].Command)
	r := regexp.MustCompile(`--android-jar-pattern [^ ]+/android.jar`)
	return r.FindAllString(cmd, -1)
}

func TestPublicDroidstubs(t *testing.T) {
	patterns := getAndroidJarPatternsForDroidstubs(t, "public")

	android.AssertArrayString(t, "order of patterns", []string{
		"--android-jar-pattern somedir/%/public/android.jar",
		"--android-jar-pattern someotherdir/%/public/android.jar",
	}, patterns)
}

func TestSystemDroidstubs(t *testing.T) {
	patterns := getAndroidJarPatternsForDroidstubs(t, "system")

	android.AssertArrayString(t, "order of patterns", []string{
		"--android-jar-pattern somedir/%/system/android.jar",
		"--android-jar-pattern someotherdir/%/system/android.jar",
		"--android-jar-pattern somedir/%/public/android.jar",
		"--android-jar-pattern someotherdir/%/public/android.jar",
	}, patterns)
}

func TestModuleLibDroidstubs(t *testing.T) {
	patterns := getAndroidJarPatternsForDroidstubs(t, "module-lib")

	android.AssertArrayString(t, "order of patterns", []string{
		"--android-jar-pattern somedir/%/module-lib/android.jar",
		"--android-jar-pattern someotherdir/%/module-lib/android.jar",
		"--android-jar-pattern somedir/%/system/android.jar",
		"--android-jar-pattern someotherdir/%/system/android.jar",
		"--android-jar-pattern somedir/%/public/android.jar",
		"--android-jar-pattern someotherdir/%/public/android.jar",
	}, patterns)
}

func TestSystemServerDroidstubs(t *testing.T) {
	patterns := getAndroidJarPatternsForDroidstubs(t, "system-server")

	android.AssertArrayString(t, "order of patterns", []string{
		"--android-jar-pattern somedir/%/system-server/android.jar",
		"--android-jar-pattern someotherdir/%/system-server/android.jar",
		"--android-jar-pattern somedir/%/module-lib/android.jar",
		"--android-jar-pattern someotherdir/%/module-lib/android.jar",
		"--android-jar-pattern somedir/%/system/android.jar",
		"--android-jar-pattern someotherdir/%/system/android.jar",
		"--android-jar-pattern somedir/%/public/android.jar",
		"--android-jar-pattern someotherdir/%/public/android.jar",
	}, patterns)
}

func TestDroidstubsSandbox(t *testing.T) {
	ctx, _ := testJavaWithFS(t, `
		genrule {
			name: "foo",
			out: ["foo.txt"],
			cmd: "touch $(out)",
		}

		droidstubs {
			name: "bar-stubs",
			srcs: ["bar-doc/a.java"],

			args: "--reference $(location :foo)",
			arg_files: [":foo"],
		}
		`,
		map[string][]byte{
			"bar-doc/a.java": nil,
		})

	m := ctx.ModuleForTests("bar-stubs", "android_common")
	metalava := m.Rule("metalava")
	if g, w := metalava.Inputs.Strings(), []string{"bar-doc/a.java"}; !reflect.DeepEqual(w, g) {
		t.Errorf("Expected inputs %q, got %q", w, g)
	}

	manifest := android.RuleBuilderSboxProtoForTests(t, m.Output("metalava.sbox.textproto"))
	if g, w := manifest.Commands[0].GetCommand(), "reference __SBOX_SANDBOX_DIR__/out/.intermediates/foo/gen/foo.txt"; !strings.Contains(g, w) {
		t.Errorf("Expected command to contain %q, got %q", w, g)
	}
}

func TestDroidstubsWithSystemModules(t *testing.T) {
	ctx, _ := testJava(t, `
		droidstubs {
		    name: "stubs-source-system-modules",
		    srcs: [
		        "bar-doc/a.java",
		    ],
				sdk_version: "none",
				system_modules: "source-system-modules",
		}

		java_library {
				name: "source-jar",
		    srcs: [
		        "a.java",
		    ],
		}

		java_system_modules {
				name: "source-system-modules",
				libs: ["source-jar"],
		}

		droidstubs {
		    name: "stubs-prebuilt-system-modules",
		    srcs: [
		        "bar-doc/a.java",
		    ],
				sdk_version: "none",
				system_modules: "prebuilt-system-modules",
		}

		java_import {
				name: "prebuilt-jar",
				jars: ["a.jar"],
		}

		java_system_modules_import {
				name: "prebuilt-system-modules",
				libs: ["prebuilt-jar"],
		}
		`)

	checkSystemModulesUseByDroidstubs(t, ctx, "stubs-source-system-modules", "source-jar.jar")

	checkSystemModulesUseByDroidstubs(t, ctx, "stubs-prebuilt-system-modules", "prebuilt-jar.jar")
}

func checkSystemModulesUseByDroidstubs(t *testing.T, ctx *android.TestContext, moduleName string, systemJar string) {
	metalavaRule := ctx.ModuleForTests(moduleName, "android_common").Rule("metalava")
	var systemJars []string
	for _, i := range metalavaRule.Implicits {
		systemJars = append(systemJars, i.Base())
	}
	if len(systemJars) < 1 || systemJars[0] != systemJar {
		t.Errorf("inputs of %q must be []string{%q}, but was %#v.", moduleName, systemJar, systemJars)
	}
}

func TestDroidstubsWithSdkExtensions(t *testing.T) {
	ctx, _ := testJavaWithFS(t, `
		droiddoc_exported_dir {
			name: "sdk-dir",
			path: "sdk",
		}

		droidstubs {
			name: "baz-stubs",
			api_levels_annotations_dirs: ["sdk-dir"],
			api_levels_annotations_enabled: true,
			extensions_info_file: ":info-file",
		}

		filegroup {
			name: "info-file",
			srcs: ["sdk/extensions/info.txt"],
		}
		`,
		map[string][]byte{
			"sdk/extensions/1/public/some-mainline-module-stubs.jar": nil,
			"sdk/extensions/info.txt":                                nil,
		})
	m := ctx.ModuleForTests("baz-stubs", "android_common")
	manifest := m.Output("metalava.sbox.textproto")
	cmdline := String(android.RuleBuilderSboxProtoForTests(t, manifest).Commands[0].Command)
	android.AssertStringDoesContain(t, "sdk-extensions-root present", cmdline, "--sdk-extensions-root sdk/extensions")
	android.AssertStringDoesContain(t, "sdk-extensions-info present", cmdline, "--sdk-extensions-info sdk/extensions/info.txt")
}

func TestApiSurfaceFromDroidStubsName(t *testing.T) {
	testCases := []struct {
		desc               string
		name               string
		expectedApiSurface string
	}{
		{
			desc:               "Default is publicapi",
			name:               "mydroidstubs",
			expectedApiSurface: "publicapi",
		},
		{
			desc:               "name contains system substring",
			name:               "mydroidstubs.system.suffix",
			expectedApiSurface: "systemapi",
		},
		{
			desc:               "name contains system_server substring",
			name:               "mydroidstubs.system_server.suffix",
			expectedApiSurface: "system-serverapi",
		},
		{
			desc:               "name contains module_lib substring",
			name:               "mydroidstubs.module_lib.suffix",
			expectedApiSurface: "module-libapi",
		},
		{
			desc:               "name contains test substring",
			name:               "mydroidstubs.test.suffix",
			expectedApiSurface: "testapi",
		},
		{
			desc:               "name contains intra.core substring",
			name:               "mydroidstubs.intra.core.suffix",
			expectedApiSurface: "intracoreapi",
		},
	}
	for _, tc := range testCases {
		android.AssertStringEquals(t, tc.desc, tc.expectedApiSurface, bazelApiSurfaceName(tc.name))
	}
}

func TestDroidStubsApiContributionGeneration(t *testing.T) {
	ctx, _ := testJavaWithFS(t, `
		droidstubs {
			name: "foo",
			srcs: ["A/a.java"],
			api_surface: "public",
			check_api: {
				current: {
					api_file: "A/current.txt",
					removed_api_file: "A/removed.txt",
				}
			}
		}
		`,
		map[string][]byte{
			"A/a.java":      nil,
			"A/current.txt": nil,
			"A/removed.txt": nil,
		},
	)

	ctx.ModuleForTests("foo.api.contribution", "")
}

func TestGeneratedApiContributionVisibilityTest(t *testing.T) {
	library_bp := `
		java_api_library {
			name: "bar",
			api_surface: "public",
			api_contributions: ["foo.api.contribution"],
		}
	`
	ctx, _ := testJavaWithFS(t, `
			droidstubs {
				name: "foo",
				srcs: ["A/a.java"],
				api_surface: "public",
				check_api: {
					current: {
						api_file: "A/current.txt",
						removed_api_file: "A/removed.txt",
					}
				},
				visibility: ["//a", "//b"],
			}
		`,
		map[string][]byte{
			"a/a.java":      nil,
			"a/current.txt": nil,
			"a/removed.txt": nil,
			"b/Android.bp":  []byte(library_bp),
		},
	)

	ctx.ModuleForTests("bar", "android_common")
}

func TestDroidstubsHideFlaggedApi(t *testing.T) {
	result := android.GroupFixturePreparers(
		prepareForJavaTest,
		android.FixtureModifyProductVariables(func(variables android.FixtureProductVariables) {
			variables.NextReleaseHideFlaggedApi = proptools.BoolPtr(true)
			variables.Release_expose_flagged_api = proptools.BoolPtr(false)
		}),
		android.FixtureMergeMockFs(map[string][]byte{
			"a/A.java":      nil,
			"a/current.txt": nil,
			"a/removed.txt": nil,
		}),
	).RunTestWithBp(t, `
	droidstubs {
		name: "foo",
		srcs: ["a/A.java"],
		api_surface: "public",
		check_api: {
			current: {
				api_file: "a/current.txt",
				removed_api_file: "a/removed.txt",
			}
		},
	}
	`)

	m := result.ModuleForTests("foo", "android_common")
	manifest := m.Output("metalava.sbox.textproto")
	cmdline := String(android.RuleBuilderSboxProtoForTests(t, manifest).Commands[0].Command)
	android.AssertStringDoesContain(t, "flagged api hide command not included", cmdline, "--hide-annotation android.annotation.FlaggedApi")
}