/*
 * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 *       copyright notice, this list of conditions and the following
 *       disclaimer in the documentation and/or other materials provided
 *       with the distribution.
 *     * Neither the name of The Linux Foundation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#define LOG_TAG "android.hardware.health@2.1-service.qti"

#include <android-base/logging.h>
#include <health/utils.h>
#include <health2impl/Health.h>
#include <log/log.h>

using ::android::hardware::health::InitHealthdConfig;
using ::android::hardware::health::V2_1::IHealth;
using namespace std::literals;

namespace {
void qti_healthd_board_init(struct healthd_config *)
{
    int fd;
    unsigned char retries = 75;
    int ret = 0;
    unsigned char buf;

retry:
    if (!retries) {
        ALOGE("Cannot open battery/capacity, fd=%d\n", fd);
        return;
    }

    fd = open("/sys/class/power_supply/battery/capacity", 0440);
    if (fd >= 0) {
        ALOGI("opened battery/capacity after %d retries\n", 75 - retries);
        while (retries) {
            ret = read(fd, &buf, 1);
            if(ret >= 0) {
                ALOGI("Read Batt Capacity after %d retries ret : %d\n", 75 - retries, ret);
                close(fd);
                return;
            }

            retries--;
            usleep(100000);
        }

        ALOGE("Failed to read Battery Capacity ret=%d\n", ret);
        close(fd);
        return;
    }

    retries--;
    usleep(100000);
    goto retry;
}
} //anonymous namespace

namespace android {
namespace hardware {
namespace health {
namespace V2_1 {
namespace implementation {

class HealthImpl : public Health {
 public:
  HealthImpl(std::unique_ptr<healthd_config>&& config)
    : Health(std::move(config)) {}
};

}  // namespace implementation
}  // namespace V2_1
}  // namespace health
}  // namespace hardware
}  // namespace android


extern "C" IHealth* HIDL_FETCH_IHealth(const char* instance) {
    using ::android::hardware::health::V2_1::implementation::HealthImpl;
    if (instance != "default"sv) {
        return nullptr;
    }
    auto config = std::make_unique<healthd_config>();
    InitHealthdConfig(config.get());
    qti_healthd_board_init(config.get());

    return new HealthImpl(std::move(config));
}