/*
 * Copyright (C) 2017 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.
 */
#define LOG_TAG "android.hardware.biometrics.fingerprint@2.3-service.dubai"

#include "BiometricsFingerprint.h"

#include <android-base/logging.h>
#include <fstream>
#include <cmath>
#include <thread>

#include <fcntl.h>
#include <poll.h>
#include <sys/stat.h>

#define NOTIFY_FINGER_UP IMotFodEventType::FINGER_UP
#define NOTIFY_FINGER_DOWN IMotFodEventType::FINGER_DOWN

#define FOD_UI_PATH "/sys/devices/platform/soc/soc:qcom,dsi-display-primary/fod_ui"

namespace android {
namespace hardware {
namespace biometrics {
namespace fingerprint {
namespace V2_3 {
namespace implementation {

static bool readBool(int fd) {
    char c;
    int rc;

    rc = lseek(fd, 0, SEEK_SET);
    if (rc) {
        LOG(ERROR) << "failed to seek fd, err: " << rc;
        return false;
    }

    rc = read(fd, &c, sizeof(char));
    if (rc != 1) {
        LOG(ERROR) << "failed to read bool from fd, err: " << rc;
        return false;
    }

    return c != '0';
}

BiometricsFingerprint::BiometricsFingerprint() {
    biometrics_2_1_service = IBiometricsFingerprint_2_1::getService();
    mMotoFingerprint = IMotoFingerPrint::getService();

    std::thread([this]() {
        int fd = open(FOD_UI_PATH, O_RDONLY);
        if (fd < 0) {
            LOG(ERROR) << "failed to open fd, err: " << fd;
            return;
        }

        struct pollfd fodUiPoll = {
            .fd = fd,
            .events = POLLERR | POLLPRI,
            .revents = 0,
        };

        while (true) {
            int rc = poll(&fodUiPoll, 1, -1);
            if (rc < 0) {
                LOG(ERROR) << "failed to poll fd, err: " << rc;
                continue;
            }
            mMotoFingerprint->sendFodEvent(readBool(fd) ? NOTIFY_FINGER_DOWN : NOTIFY_FINGER_UP , {},
                [](IMotFodEventResult, const hidl_vec<signed char>&) {});
        }
    }).detach();
}

Return<uint64_t> BiometricsFingerprint::setNotify(const sp<IBiometricsFingerprintClientCallback>& clientCallback) {
    return biometrics_2_1_service->setNotify(clientCallback);
}

Return<uint64_t> BiometricsFingerprint::preEnroll() {
    return biometrics_2_1_service->preEnroll();
}

Return<RequestStatus> BiometricsFingerprint::enroll(const hidl_array<uint8_t, 69>& hat, uint32_t gid, uint32_t timeoutSec) {
    return biometrics_2_1_service->enroll(hat, gid, timeoutSec);
}

Return<RequestStatus> BiometricsFingerprint::postEnroll() {
    return biometrics_2_1_service->postEnroll();
}

Return<uint64_t> BiometricsFingerprint::getAuthenticatorId() {
    return biometrics_2_1_service->getAuthenticatorId();
}

Return<RequestStatus> BiometricsFingerprint::cancel() {
    return biometrics_2_1_service->cancel();
}

Return<RequestStatus> BiometricsFingerprint::enumerate() {
    return biometrics_2_1_service->enumerate();
}

Return<RequestStatus> BiometricsFingerprint::remove(uint32_t gid, uint32_t fid) {
    return biometrics_2_1_service->remove(gid, fid);
}

Return<RequestStatus> BiometricsFingerprint::setActiveGroup(uint32_t gid, const hidl_string& storePath) {
    return biometrics_2_1_service->setActiveGroup(gid, storePath);
}

Return<RequestStatus> BiometricsFingerprint::authenticate(uint64_t operationId, uint32_t gid) {
    return biometrics_2_1_service->authenticate(operationId, gid);
}

Return<bool> BiometricsFingerprint::isUdfps(uint32_t) {
    return true;
}

Return<void> BiometricsFingerprint::onFingerDown(uint32_t, uint32_t, float, float) {
    return Void();
}

Return<void> BiometricsFingerprint::onFingerUp() {
    return Void();
}

}  // namespace implementation
}  // namespace V2_3
}  // namespace fingerprint
}  // namespace biometrics
}  // namespace hardware
}  // namespace android