/*
 * Copyright 2021 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 <gtest/gtest.h>
#include <string.h>

#include <cstdint>
#include <map>
#include <memory>
#include <string>

#include "common/message_loop_thread.h"
#include "common/strings.h"
#include "stack/gatt/gatt_int.h"
#include "stack/include/gatt_api.h"
#include "test/common/mock_functions.h"
#include "types/bluetooth/uuid.h"
#include "types/raw_address.h"

class StackGattTest : public ::testing::Test {};

namespace {

// Actual size of structure without compiler padding
size_t actual_sizeof_tGATT_REG() {
  return sizeof(bluetooth::Uuid) + sizeof(tGATT_CBACK) + sizeof(tGATT_IF) +
         sizeof(bool) + sizeof(uint8_t) + sizeof(bool);
}

void tGATT_DISC_RES_CB(uint16_t conn_id, tGATT_DISC_TYPE disc_type,
                       tGATT_DISC_RES* p_data) {}
void tGATT_DISC_CMPL_CB(uint16_t conn_id, tGATT_DISC_TYPE disc_type,
                        tGATT_STATUS status) {}
void tGATT_CMPL_CBACK(uint16_t conn_id, tGATTC_OPTYPE op, tGATT_STATUS status,
                      tGATT_CL_COMPLETE* p_data) {}
void tGATT_CONN_CBACK(tGATT_IF gatt_if, const RawAddress& bda, uint16_t conn_id,
                      bool connected, tGATT_DISCONN_REASON reason,
                      tBT_TRANSPORT transport) {}
void tGATT_REQ_CBACK(uint16_t conn_id, uint32_t trans_id, tGATTS_REQ_TYPE type,
                     tGATTS_DATA* p_data) {}
void tGATT_CONGESTION_CBACK(uint16_t conn_id, bool congested) {}
void tGATT_ENC_CMPL_CB(tGATT_IF gatt_if, const RawAddress& bda) {}
void tGATT_PHY_UPDATE_CB(tGATT_IF gatt_if, uint16_t conn_id, uint8_t tx_phy,
                         uint8_t rx_phy, tGATT_STATUS status) {}
void tGATT_CONN_UPDATE_CB(tGATT_IF gatt_if, uint16_t conn_id, uint16_t interval,
                          uint16_t latency, uint16_t timeout,
                          tGATT_STATUS status) {}

tGATT_CBACK gatt_callbacks = {
    .p_conn_cb = tGATT_CONN_CBACK,
    .p_cmpl_cb = tGATT_CMPL_CBACK,
    .p_disc_res_cb = tGATT_DISC_RES_CB,
    .p_disc_cmpl_cb = tGATT_DISC_CMPL_CB,
    .p_req_cb = tGATT_REQ_CBACK,
    .p_enc_cmpl_cb = tGATT_ENC_CMPL_CB,
    .p_congestion_cb = tGATT_CONGESTION_CBACK,
    .p_phy_update_cb = tGATT_PHY_UPDATE_CB,
    .p_conn_update_cb = tGATT_CONN_UPDATE_CB,
};

}  // namespace

TEST_F(StackGattTest, lifecycle_tGATT_REG) {
  {
    std::unique_ptr<tGATT_REG> reg0 = std::make_unique<tGATT_REG>();
    std::unique_ptr<tGATT_REG> reg1 = std::make_unique<tGATT_REG>();
    memset(reg0.get(), 0xff, sizeof(tGATT_REG));
    memset(reg1.get(), 0xff, sizeof(tGATT_REG));
    ASSERT_EQ(0, memcmp(reg0.get(), reg1.get(), sizeof(tGATT_REG)));

    memset(reg0.get(), 0x0, sizeof(tGATT_REG));
    memset(reg1.get(), 0x0, sizeof(tGATT_REG));
    ASSERT_EQ(0, memcmp(reg0.get(), reg1.get(), sizeof(tGATT_REG)));
  }

  {
    std::unique_ptr<tGATT_REG> reg0 = std::make_unique<tGATT_REG>();
    memset(reg0.get(), 0xff, sizeof(tGATT_REG));

    tGATT_REG reg1;
    memset(&reg1, 0xff, sizeof(tGATT_REG));

    // Clear the structures
    memset(reg0.get(), 0, sizeof(tGATT_REG));
    // Restore the complex structure after memset
    memset(&reg1.name, 0, sizeof(std::string));
    reg1 = {};
    ASSERT_EQ(0, memcmp(reg0.get(), &reg1, actual_sizeof_tGATT_REG()));
  }

  {
    tGATT_REG* reg0 = new tGATT_REG();
    tGATT_REG* reg1 = new tGATT_REG();
    memset(reg0, 0, sizeof(tGATT_REG));
    *reg1 = {};
    reg0->in_use = true;
    ASSERT_NE(0, memcmp(reg0, reg1, sizeof(tGATT_REG)));
    delete reg1;
    delete reg0;
  }
}

TEST_F(StackGattTest, gatt_init_free) {
  gatt_init();
  gatt_free();
}

TEST_F(StackGattTest, GATT_Register_Deregister) {
  gatt_init();

  // Gatt db profile always takes the first slot
  tGATT_IF apps[GATT_MAX_APPS - 1];

  for (int i = 0; i < GATT_MAX_APPS - 1; i++) {
    std::string name = bluetooth::common::StringFormat("name%02d", i);
    apps[i] = GATT_Register(bluetooth::Uuid::GetRandom(), name, &gatt_callbacks,
                            false);
  }

  for (int i = 0; i < GATT_MAX_APPS - 1; i++) {
    GATT_Deregister(apps[i]);
  }

  gatt_free();
}

TEST_F(StackGattTest, gatt_status_text) {
  std::vector<std::pair<tGATT_STATUS, std::string>> statuses = {
      std::make_pair(GATT_SUCCESS, "GATT_SUCCESS"),  // Also GATT_ENCRYPED_MITM
      std::make_pair(GATT_INVALID_HANDLE, "GATT_INVALID_HANDLE"),
      std::make_pair(GATT_READ_NOT_PERMIT, "GATT_READ_NOT_PERMIT"),
      std::make_pair(GATT_WRITE_NOT_PERMIT, "GATT_WRITE_NOT_PERMIT"),
      std::make_pair(GATT_INVALID_PDU, "GATT_INVALID_PDU"),
      std::make_pair(GATT_INSUF_AUTHENTICATION, "GATT_INSUF_AUTHENTICATION"),
      std::make_pair(GATT_REQ_NOT_SUPPORTED, "GATT_REQ_NOT_SUPPORTED"),
      std::make_pair(GATT_INVALID_OFFSET, "GATT_INVALID_OFFSET"),
      std::make_pair(GATT_INSUF_AUTHORIZATION, "GATT_INSUF_AUTHORIZATION"),
      std::make_pair(GATT_PREPARE_Q_FULL, "GATT_PREPARE_Q_FULL"),
      std::make_pair(GATT_NOT_FOUND, "GATT_NOT_FOUND"),
      std::make_pair(GATT_NOT_LONG, "GATT_NOT_LONG"),
      std::make_pair(GATT_INSUF_KEY_SIZE, "GATT_INSUF_KEY_SIZE"),
      std::make_pair(GATT_INVALID_ATTR_LEN, "GATT_INVALID_ATTR_LEN"),
      std::make_pair(GATT_ERR_UNLIKELY, "GATT_ERR_UNLIKELY"),
      std::make_pair(GATT_INSUF_ENCRYPTION, "GATT_INSUF_ENCRYPTION"),
      std::make_pair(GATT_UNSUPPORT_GRP_TYPE, "GATT_UNSUPPORT_GRP_TYPE"),
      std::make_pair(GATT_INSUF_RESOURCE, "GATT_INSUF_RESOURCE"),
      std::make_pair(GATT_DATABASE_OUT_OF_SYNC, "GATT_DATABASE_OUT_OF_SYNC"),
      std::make_pair(GATT_VALUE_NOT_ALLOWED, "GATT_VALUE_NOT_ALLOWED"),
      std::make_pair(GATT_ILLEGAL_PARAMETER, "GATT_ILLEGAL_PARAMETER"),
      std::make_pair(GATT_TOO_SHORT, "GATT_TOO_SHORT"),
      std::make_pair(GATT_NO_RESOURCES, "GATT_NO_RESOURCES"),
      std::make_pair(GATT_INTERNAL_ERROR, "GATT_INTERNAL_ERROR"),
      std::make_pair(GATT_WRONG_STATE, "GATT_WRONG_STATE"),
      std::make_pair(GATT_DB_FULL, "GATT_DB_FULL"),
      std::make_pair(GATT_BUSY, "GATT_BUSY"),
      std::make_pair(GATT_ERROR, "GATT_ERROR"),
      std::make_pair(GATT_CMD_STARTED, "GATT_CMD_STARTED"),
      std::make_pair(GATT_PENDING, "GATT_PENDING"),
      std::make_pair(GATT_AUTH_FAIL, "GATT_AUTH_FAIL"),
      std::make_pair(GATT_MORE, "GATT_MORE"),
      std::make_pair(GATT_INVALID_CFG, "GATT_INVALID_CFG"),
      std::make_pair(GATT_SERVICE_STARTED, "GATT_SERVICE_STARTED"),
      std::make_pair(GATT_ENCRYPED_NO_MITM, "GATT_ENCRYPED_NO_MITM"),
      std::make_pair(GATT_NOT_ENCRYPTED, "GATT_NOT_ENCRYPTED"),
      std::make_pair(GATT_CONGESTED, "GATT_CONGESTED"),
      std::make_pair(GATT_DUP_REG, "GATT_DUP_REG"),
      std::make_pair(GATT_ALREADY_OPEN, "GATT_ALREADY_OPEN"),
      std::make_pair(GATT_CANCEL, "GATT_CANCEL"),
      std::make_pair(GATT_CCC_CFG_ERR, "GATT_CCC_CFG_ERR"),
      std::make_pair(GATT_PRC_IN_PROGRESS, "GATT_PRC_IN_PROGRESS"),
      std::make_pair(GATT_OUT_OF_RANGE, "GATT_OUT_OF_RANGE"),
  };
  for (const auto& status : statuses) {
    ASSERT_STREQ(status.second.c_str(), gatt_status_text(status.first).c_str());
  }
  // Typical max value is already classified so use arbitrary unused one.
  auto unknown = base::StringPrintf("UNKNOWN[%hhu]", 0xfc);
  ASSERT_STREQ(unknown.c_str(),
               gatt_status_text(static_cast<tGATT_STATUS>(0xfc)).c_str());
}