/*
 * Copyright (C) 2019 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.
 */

#include <EngineConfig.h>
#include <ParameterManagerWrapper.h>

#include <gtest/gtest.h>

#include <unistd.h>
#include <string>
#include "utility/ValidateXml.h"

#include <system/audio_config.h>

static const std::string config = "audio_policy_engine_configuration.xml";
static const std::string schema =
        std::string(XSD_DIR) + "/audio_policy_engine_configuration_V1_0.xsd";

static const std::string configurableSchemas =
        std::string(XSD_DIR) + "/audio_policy_engine_configurable_configuration_V1_0.xsd";
static const std::string configurableConfig =
        "parameter-framework/ParameterFrameworkConfigurationPolicy.xml";

/**
 * @brief TEST to ensure the audio policy engine configuration file is validating schemas.
 * Note: this configuration file is not mandatory, an hardcoded fallback is provided, so
 * it does not fail if not found.
 */
TEST(ValidateConfiguration, audioPolicyEngineConfiguration) {
    RecordProperty("description",
                   "Verify that the audio policy engine configuration file "
                   "is valid according to the schemas");
    EXPECT_VALID_XML_MULTIPLE_LOCATIONS(config.c_str(), android::audio_get_configuration_paths(),
                                        schema.c_str());
}

/**
 * @brief deviceUsesConfigurableEngine checks if the configuration file for
 * the engine presents on the device AND
 * for the configurable engine (aka Parameter-Framework top configuration file) presents.
 */
static bool deviceUsesConfigurableEngine() {
    return android::hardware::audio::common::test::utility::validateXmlMultipleLocations<true>(
                   "", "", "", config.c_str(), android::audio_get_configuration_paths(),
                   schema.c_str()) &&
           android::hardware::audio::common::test::utility::validateXmlMultipleLocations<true>(
                   "", "", "", configurableConfig.c_str(), android::audio_get_configuration_paths(),
                   configurableSchemas.c_str());
}

TEST(ValidateConfiguration, audioPolicyEngineConfigurable) {
    if (!deviceUsesConfigurableEngine()) {
        GTEST_SKIP() << "Device using legacy engine without parameter-framework, n-op.";
    }
    RecordProperty("description",
                   "Verify that the audio policy engine PFW configuration files "
                   "are valid according to the schemas");

    auto testAudioPolicyEnginePfw = [&](bool validateSchema, const std::string& schemasUri) {
        auto result = android::engineConfig::parse();

        ASSERT_NE(nullptr, result.parsedConfig)
                << "failed to parse audio policy engine configuration";

        ASSERT_EQ(result.nbSkippedElement, 0) << "skipped %zu elements " << result.nbSkippedElement;

        std::unique_ptr<android::audio_policy::ParameterManagerWrapper> policyParameterMgr(
                new android::audio_policy::ParameterManagerWrapper(validateSchema, schemasUri));
        ASSERT_NE(nullptr, policyParameterMgr) << "failed to create Audio Policy Engine PFW";

        // Load the criterion types and criteria
        for (auto& criterion : result.parsedConfig->criteria) {
            android::engineConfig::CriterionType criterionType;
            for (auto& configCriterionType : result.parsedConfig->criterionTypes) {
                if (configCriterionType.name == criterion.typeName) {
                    criterionType = configCriterionType;
                    break;
                }
            }
            ASSERT_FALSE(criterionType.name.empty())
                    << "Invalid criterion type for " << criterion.name.c_str();
            policyParameterMgr->addCriterion(criterion.name, criterionType.isInclusive,
                                             criterionType.valuePairs,
                                             criterion.defaultLiteralValue);
        }
        ASSERT_EQ(0, result.nbSkippedElement) << "failed to parse Audio Policy Engine PFW criteria";

        // If the PFW cannot validate, it will not start
        std::string error;
        auto status = policyParameterMgr->start(error);
        ASSERT_EQ(status, android::NO_ERROR)
                << "failed to " << (validateSchema ? "validate" : "start")
                << " Audio Policy Engine PFW: " << error;

        ASSERT_TRUE(policyParameterMgr->isStarted());
    };

    // First round for sanity to ensure we can launch the Audio Policy Engine PFW without
    // schema validation successfully, otherwise it is not forth going on running validation...
    testAudioPolicyEnginePfw(false, {});

    // If second round fails, it means parameter-framework cannot validate schema
    testAudioPolicyEnginePfw(true, {XSD_PFW_DIR});
}