// Copyright 2019 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 (
	"path/filepath"
	"reflect"
	"strings"
	"testing"

	"github.com/google/blueprint/proptools"

	"android/soong/android"
	"android/soong/java/config"
)

func TestClasspath(t *testing.T) {
	var classpathTestcases = []struct {
		name       string
		unbundled  bool
		pdk        bool
		moduleType string
		host       android.OsClass
		properties string

		// for java 8
		bootclasspath  []string
		java8classpath []string

		// for java 9
		system         string
		java9classpath []string

		forces8 bool // if set, javac will always be called with java 8 arguments

		aidl string
	}{
		{
			name:           "default",
			bootclasspath:  config.DefaultBootclasspathLibraries,
			system:         config.DefaultSystemModules,
			java8classpath: config.DefaultLibraries,
			java9classpath: config.DefaultLibraries,
			aidl:           "-Iframework/aidl",
		},
		{
			name:           `sdk_version:"core_platform"`,
			properties:     `sdk_version:"core_platform"`,
			bootclasspath:  config.DefaultBootclasspathLibraries,
			system:         config.DefaultSystemModules,
			java8classpath: []string{},
			aidl:           "",
		},
		{
			name:           "blank sdk version",
			properties:     `sdk_version: "",`,
			bootclasspath:  config.DefaultBootclasspathLibraries,
			system:         config.DefaultSystemModules,
			java8classpath: config.DefaultLibraries,
			java9classpath: config.DefaultLibraries,
			aidl:           "-Iframework/aidl",
		},
		{

			name:           "sdk v29",
			properties:     `sdk_version: "29",`,
			bootclasspath:  []string{`""`},
			forces8:        true,
			java8classpath: []string{"prebuilts/sdk/29/public/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
			aidl:           "-pprebuilts/sdk/29/public/framework.aidl",
		},
		{

			name:           "current",
			properties:     `sdk_version: "current",`,
			bootclasspath:  []string{"android_stubs_current", "core-lambda-stubs"},
			system:         "core-current-stubs-system-modules",
			java9classpath: []string{"android_stubs_current"},
			aidl:           "-p" + buildDir + "/framework.aidl",
		},
		{

			name:           "system_current",
			properties:     `sdk_version: "system_current",`,
			bootclasspath:  []string{"android_system_stubs_current", "core-lambda-stubs"},
			system:         "core-current-stubs-system-modules",
			java9classpath: []string{"android_system_stubs_current"},
			aidl:           "-p" + buildDir + "/framework.aidl",
		},
		{

			name:           "system_29",
			properties:     `sdk_version: "system_29",`,
			bootclasspath:  []string{`""`},
			forces8:        true,
			java8classpath: []string{"prebuilts/sdk/29/system/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
			aidl:           "-pprebuilts/sdk/29/public/framework.aidl",
		},
		{

			name:           "test_current",
			properties:     `sdk_version: "test_current",`,
			bootclasspath:  []string{"android_test_stubs_current", "core-lambda-stubs"},
			system:         "core-current-stubs-system-modules",
			java9classpath: []string{"android_test_stubs_current"},
			aidl:           "-p" + buildDir + "/framework.aidl",
		},
		{

			name:           "core_current",
			properties:     `sdk_version: "core_current",`,
			bootclasspath:  []string{"core.current.stubs", "core-lambda-stubs"},
			system:         "core-current-stubs-system-modules",
			java9classpath: []string{"core.current.stubs"},
		},
		{

			name:           "nostdlib",
			properties:     `sdk_version: "none", system_modules: "none"`,
			system:         "none",
			bootclasspath:  []string{`""`},
			java8classpath: []string{},
		},
		{

			name:           "nostdlib system_modules",
			properties:     `sdk_version: "none", system_modules: "core-platform-api-stubs-system-modules"`,
			system:         "core-platform-api-stubs-system-modules",
			bootclasspath:  []string{"core-platform-api-stubs-system-modules-lib"},
			java8classpath: []string{},
		},
		{

			name:           "host default",
			moduleType:     "java_library_host",
			properties:     ``,
			host:           android.Host,
			bootclasspath:  []string{"jdk8/jre/lib/jce.jar", "jdk8/jre/lib/rt.jar"},
			java8classpath: []string{},
		},
		{

			name:           "host supported default",
			host:           android.Host,
			properties:     `host_supported: true,`,
			java8classpath: []string{},
			bootclasspath:  []string{"jdk8/jre/lib/jce.jar", "jdk8/jre/lib/rt.jar"},
		},
		{
			name:           "host supported nostdlib",
			host:           android.Host,
			properties:     `host_supported: true, sdk_version: "none", system_modules: "none"`,
			java8classpath: []string{},
		},
		{

			name:           "unbundled sdk v29",
			unbundled:      true,
			properties:     `sdk_version: "29",`,
			bootclasspath:  []string{`""`},
			forces8:        true,
			java8classpath: []string{"prebuilts/sdk/29/public/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
			aidl:           "-pprebuilts/sdk/29/public/framework.aidl",
		},
		{

			name:           "unbundled current",
			unbundled:      true,
			properties:     `sdk_version: "current",`,
			bootclasspath:  []string{`""`},
			forces8:        true,
			java8classpath: []string{"prebuilts/sdk/current/public/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
			aidl:           "-pprebuilts/sdk/current/public/framework.aidl",
		},

		{
			name:           "pdk default",
			pdk:            true,
			bootclasspath:  []string{`""`},
			forces8:        true,
			java8classpath: []string{"prebuilts/sdk/29/public/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
			aidl:           "-pprebuilts/sdk/29/public/framework.aidl",
		},
		{
			name:           "pdk current",
			pdk:            true,
			properties:     `sdk_version: "current",`,
			bootclasspath:  []string{`""`},
			forces8:        true,
			java8classpath: []string{"prebuilts/sdk/29/public/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
			aidl:           "-pprebuilts/sdk/29/public/framework.aidl",
		},
		{
			name:           "pdk 29",
			pdk:            true,
			properties:     `sdk_version: "29",`,
			bootclasspath:  []string{`""`},
			forces8:        true,
			java8classpath: []string{"prebuilts/sdk/29/public/android.jar", "prebuilts/sdk/tools/core-lambda-stubs.jar"},
			aidl:           "-pprebuilts/sdk/29/public/framework.aidl",
		},
	}

	for _, testcase := range classpathTestcases {
		t.Run(testcase.name, func(t *testing.T) {
			moduleType := "java_library"
			if testcase.moduleType != "" {
				moduleType = testcase.moduleType
			}

			props := `
				name: "foo",
				srcs: ["a.java"],
				target: {
					android: {
						srcs: ["bar-doc/IFoo.aidl"],
					},
				},
				`
			bp := moduleType + " {" + props + testcase.properties + `
			}`
			bpJava8 := moduleType + " {" + props + `java_version: "1.8",
				` + testcase.properties + `
			}`

			variant := "android_common"
			if testcase.host == android.Host {
				variant = android.BuildOs.String() + "_common"
			}

			convertModulesToPaths := func(cp []string) []string {
				ret := make([]string, len(cp))
				for i, e := range cp {
					ret[i] = moduleToPath(e)
				}
				return ret
			}

			bootclasspath := convertModulesToPaths(testcase.bootclasspath)
			java8classpath := convertModulesToPaths(testcase.java8classpath)
			java9classpath := convertModulesToPaths(testcase.java9classpath)

			bc := ""
			var bcDeps []string
			if len(bootclasspath) > 0 {
				bc = "-bootclasspath " + strings.Join(bootclasspath, ":")
				if bootclasspath[0] != `""` {
					bcDeps = bootclasspath
				}
			}

			j8c := ""
			if len(java8classpath) > 0 {
				j8c = "-classpath " + strings.Join(java8classpath, ":")
			}

			j9c := ""
			if len(java9classpath) > 0 {
				j9c = "-classpath " + strings.Join(java9classpath, ":")
			}

			system := ""
			var systemDeps []string
			if testcase.system == "none" {
				system = "--system=none"
			} else if testcase.system != "" {
				system = "--system=" + filepath.Join(buildDir, ".intermediates", testcase.system, "android_common", "system")
				// The module-relative parts of these paths are hardcoded in system_modules.go:
				systemDeps = []string{
					filepath.Join(buildDir, ".intermediates", testcase.system, "android_common", "system", "lib", "modules"),
					filepath.Join(buildDir, ".intermediates", testcase.system, "android_common", "system", "lib", "jrt-fs.jar"),
					filepath.Join(buildDir, ".intermediates", testcase.system, "android_common", "system", "release"),
				}
			}

			checkClasspath := func(t *testing.T, ctx *android.TestContext, isJava8 bool) {
				foo := ctx.ModuleForTests("foo", variant)
				javac := foo.Rule("javac")
				var deps []string

				aidl := foo.MaybeRule("aidl")
				if aidl.Rule != nil {
					deps = append(deps, aidl.Output.String())
				}

				got := javac.Args["bootClasspath"]
				expected := ""
				if isJava8 || testcase.forces8 {
					expected = bc
					deps = append(deps, bcDeps...)
				} else {
					expected = system
					deps = append(deps, systemDeps...)
				}
				if got != expected {
					t.Errorf("bootclasspath expected %q != got %q", expected, got)
				}

				if isJava8 || testcase.forces8 {
					expected = j8c
					deps = append(deps, java8classpath...)
				} else {
					expected = j9c
					deps = append(deps, java9classpath...)
				}
				got = javac.Args["classpath"]
				if got != expected {
					t.Errorf("classpath expected %q != got %q", expected, got)
				}

				if !reflect.DeepEqual(javac.Implicits.Strings(), deps) {
					t.Errorf("implicits expected %q != got %q", deps, javac.Implicits.Strings())
				}
			}

			// Test with legacy javac -source 1.8 -target 1.8
			t.Run("Java language level 8", func(t *testing.T) {
				config := testConfig(nil, bpJava8, nil)
				if testcase.unbundled {
					config.TestProductVariables.Unbundled_build = proptools.BoolPtr(true)
				}
				if testcase.pdk {
					config.TestProductVariables.Pdk = proptools.BoolPtr(true)
				}
				ctx := testContext()
				run(t, ctx, config)

				checkClasspath(t, ctx, true /* isJava8 */)

				if testcase.host != android.Host {
					aidl := ctx.ModuleForTests("foo", variant).Rule("aidl")

					if g, w := aidl.RuleParams.Command, testcase.aidl+" -I."; !strings.Contains(g, w) {
						t.Errorf("want aidl command to contain %q, got %q", w, g)
					}
				}
			})

			// Test with default javac -source 9 -target 9
			t.Run("Java language level 9", func(t *testing.T) {
				config := testConfig(nil, bp, nil)
				if testcase.unbundled {
					config.TestProductVariables.Unbundled_build = proptools.BoolPtr(true)
				}
				if testcase.pdk {
					config.TestProductVariables.Pdk = proptools.BoolPtr(true)
				}
				ctx := testContext()
				run(t, ctx, config)

				checkClasspath(t, ctx, false /* isJava8 */)

				if testcase.host != android.Host {
					aidl := ctx.ModuleForTests("foo", variant).Rule("aidl")

					if g, w := aidl.RuleParams.Command, testcase.aidl+" -I."; !strings.Contains(g, w) {
						t.Errorf("want aidl command to contain %q, got %q", w, g)
					}
				}
			})

			// Test again with PLATFORM_VERSION_CODENAME=REL, javac -source 8 -target 8
			t.Run("REL + Java language level 8", func(t *testing.T) {
				config := testConfig(nil, bpJava8, nil)
				config.TestProductVariables.Platform_sdk_codename = proptools.StringPtr("REL")
				config.TestProductVariables.Platform_sdk_final = proptools.BoolPtr(true)

				if testcase.unbundled {
					config.TestProductVariables.Unbundled_build = proptools.BoolPtr(true)
				}
				if testcase.pdk {
					config.TestProductVariables.Pdk = proptools.BoolPtr(true)
				}
				ctx := testContext()
				run(t, ctx, config)

				checkClasspath(t, ctx, true /* isJava8 */)
			})

			// Test again with PLATFORM_VERSION_CODENAME=REL, javac -source 9 -target 9
			t.Run("REL + Java language level 9", func(t *testing.T) {
				config := testConfig(nil, bp, nil)
				config.TestProductVariables.Platform_sdk_codename = proptools.StringPtr("REL")
				config.TestProductVariables.Platform_sdk_final = proptools.BoolPtr(true)

				if testcase.unbundled {
					config.TestProductVariables.Unbundled_build = proptools.BoolPtr(true)
				}
				if testcase.pdk {
					config.TestProductVariables.Pdk = proptools.BoolPtr(true)
				}
				ctx := testContext()
				run(t, ctx, config)

				checkClasspath(t, ctx, false /* isJava8 */)
			})
		})
	}
}