/*
 * Copyright (C) 2016 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 <stdint.h>
#include <inttypes.h>
#include <chre.h>

#define APP_LABEL "CHRE App 1: "

/* chre.h does not define printf format attribute for chreLog() */
void chreLog(enum chreLogLevel level, const char *str, ...) __attribute__ ((__format__ (__printf__, 2, 3)));

#define EVT_LOCAL_SETUP CHRE_EVENT_FIRST_USER_VALUE

struct MyTimer {
    uint32_t timerId;
};

struct ExtMsg
{
    uint8_t msg;
    uint32_t val;
} __attribute__((packed));

static const uint64_t kOneSecond = UINT64_C(1000000000); // in nanoseconds

static uint32_t mMyTid;
static uint64_t mMyAppId;
static int mCnt;
static struct MyTimer mTimer;

// Default implementation for message free
static void nanoappFreeMessage(void *msg, size_t size)
{
    chreHeapFree(msg);
}

bool nanoappStart(void)
{
    mMyAppId = chreGetAppId();
    mMyTid = chreGetInstanceId();
    mCnt = 3;
    chreSendEvent(EVT_LOCAL_SETUP, NULL, NULL, mMyTid);
    chreLog(CHRE_LOG_INFO, APP_LABEL "init");
    return true;
}

void nanoappEnd(void)
{
    chreLog(CHRE_LOG_INFO, APP_LABEL "terminating");
}

class A {
    int *p;
public:
    A(int _x) {
        p = new int[1];
        if (p != nullptr)
            *p = _x;
        chreLog(CHRE_LOG_INFO, APP_LABEL "A::A(int): *p=%d", p != nullptr ? *p : 0);
    }
    ~A() {
        chreLog(CHRE_LOG_INFO, APP_LABEL "A::~A(): *p=%d", p != nullptr ? *p : 0);
        delete p;
        p = nullptr;
    }
};

static A global_with_ctor_dtor(1);  // test the behavior of global static constructors/destructors

void nanoappHandleEvent(uint32_t srcTid, uint16_t evtType, const void* evtData)
{
    static A local_static_with_ctor_dtor(2); // test the behavior of local static constructors/destructors

    switch (evtType) {
    case  EVT_LOCAL_SETUP:
        mTimer.timerId = chreTimerSet(kOneSecond, &mTimer, false);
        chreLog(CHRE_LOG_INFO, APP_LABEL "started with tid %04" PRIX32
                               " timerid %" PRIu32
                               "\n", mMyTid, mTimer.timerId);
        break;
    case CHRE_EVENT_TIMER:
    {
        const struct MyTimer *t = (const struct MyTimer *)evtData;
        auto extMsg = new ExtMsg;

        chreLog(CHRE_LOG_INFO, APP_LABEL "received timer %" PRIu32
                               " (TIME: %" PRIu64
                               ") cnt: %d\n", t->timerId, chreGetTime(), mCnt);
        extMsg->msg = 0x01;
        extMsg->val = mCnt;
        chreSendMessageToHost(extMsg, sizeof(*extMsg), 0, nanoappFreeMessage);
        if (mCnt-- <= 0)
            chreTimerCancel(t->timerId);
        break;
    }
    case CHRE_EVENT_MESSAGE_FROM_HOST:
    {
        const struct chreMessageFromHostData *msg = (const struct chreMessageFromHostData *)evtData;
        const uint8_t *data = (const uint8_t *)msg->message;
        const size_t size = msg->messageSize;
        chreLog(CHRE_LOG_INFO, APP_LABEL "message=%p; code=%d; size=%zu",
                data, (data && size) ? data[0] : 0, size);
        break;
    }
    }
}