/*
 * Copyright (C) 2018-2021 Intel Corporation
 *
 * SPDX-License-Identifier: MIT
 *
 */

#pragma once

#include "shared/source/execution_environment/execution_environment.h"
#include "shared/source/execution_environment/root_device_environment.h"
#include "shared/source/helpers/constants.h"
#include "shared/source/helpers/hw_helper.h"
#include "shared/source/helpers/string.h"
#include "shared/source/os_interface/linux/drm_neo.h"

#include "opencl/source/platform/platform.h"
#include "opencl/test/unit_test/linux/mock_os_layer.h"

#include "drm/i915_drm.h"
#include "gtest/gtest.h"

#include <cstdio>
#include <fstream>
#include <limits.h>
#include <map>

using namespace NEO;

// Mock DRM class that responds to DRM_IOCTL_I915_GETPARAMs
class DrmMock : public Drm {
  public:
    using Drm::bindAvailable;
    using Drm::cacheInfo;
    using Drm::checkQueueSliceSupport;
    using Drm::classHandles;
    using Drm::contextDebugSupported;
    using Drm::engineInfo;
    using Drm::generateElfUUID;
    using Drm::generateUUID;
    using Drm::getQueueSliceCount;
    using Drm::memoryInfo;
    using Drm::nonPersistentContextsSupported;
    using Drm::preemptionSupported;
    using Drm::query;
    using Drm::requirePerContextVM;
    using Drm::sliceCountChangeSupported;
    using Drm::systemInfo;
    using Drm::translateTopologyInfo;
    using Drm::virtualMemoryIds;

    DrmMock(int fd, RootDeviceEnvironment &rootDeviceEnvironment) : Drm(std::make_unique<HwDeviceIdDrm>(fd, ""), rootDeviceEnvironment) {
        sliceCountChangeSupported = true;

        if (rootDeviceEnvironment.executionEnvironment.isDebuggingEnabled()) {
            setPerContextVMRequired(true);
        }

        if (!isPerContextVMRequired()) {
            createVirtualMemoryAddressSpace(HwHelper::getSubDevicesCount(rootDeviceEnvironment.getHardwareInfo()));
        }
    }
    DrmMock(RootDeviceEnvironment &rootDeviceEnvironment) : DrmMock(mockFd, rootDeviceEnvironment) {}

    int ioctl(unsigned long request, void *arg) override;
    int getErrno() override {
        if (baseErrno) {
            return Drm::getErrno();
        }
        return errnoRetVal;
    }

    void writeConfigFile(const char *name, int deviceID) {
        std::ofstream tempfile(name, std::ios::binary);
        if (tempfile.is_open()) {
            PCIConfig config;
            config.DeviceID = deviceID;
            tempfile.write(reinterpret_cast<char *>(&config), sizeof(config));
            tempfile.close();
        }
    }

    void deleteConfigFile(const char *name) {
        std::ofstream tempfile(name);
        if (tempfile.is_open()) {
            tempfile.close();
            remove(name);
        }
    }

    void setFileDescriptor(int fd) {
        hwDeviceId = std::make_unique<HwDeviceIdDrm>(fd, "");
    }

    void setPciPath(const char *pciPath) {
        hwDeviceId = std::make_unique<HwDeviceIdDrm>(getFileDescriptor(), pciPath);
    }

    void setDeviceID(int deviceId) { this->deviceId = deviceId; }
    void setDeviceRevID(int revisionId) { this->revisionId = revisionId; }
    void setBindAvailable() {
        this->bindAvailable = true;
    }
    void setContextDebugFlag(uint32_t drmContextId) override {
        passedContextDebugId = drmContextId;
        return Drm::setContextDebugFlag(drmContextId);
    }

    bool isDebugAttachAvailable() override {
        if (allowDebugAttachCallBase) {
            return Drm::isDebugAttachAvailable();
        }
        return allowDebugAttach;
    }

    static const int mockFd = 33;

    bool failRetTopology = false;
    bool baseErrno = true;
    int errnoRetVal = 0;
    int storedEUVal = 8;
    int storedSSVal = 2;
    int storedSVal = 1;
    int storedDeviceID = 1;
    int storedDeviceRevID = 1;
    int storedHasPooledEU = 1;
    int storedMinEUinPool = 1;
    int storedPersistentContextsSupport = 1;
    int storedRetVal = 0;
    int storedRetValForGetGttSize = 0;
    int storedRetValForGetSSEU = 0;
    int storedRetValForSetSSEU = 0;
    int storedRetValForDeviceID = 0;
    int storedRetValForEUVal = 0;
    int storedRetValForSSVal = 0;
    int storedRetValForDeviceRevID = 0;
    int storedRetValForPooledEU = 0;
    int storedRetValForMinEUinPool = 0;
    int storedRetValForPersistant = 0;
    int storedPreemptionSupport =
        I915_SCHEDULER_CAP_ENABLED |
        I915_SCHEDULER_CAP_PRIORITY |
        I915_SCHEDULER_CAP_PREEMPTION;
    int storedExecSoftPin = 0;
    int storedRetValForVmId = 1;
    int storedCsTimestampFrequency = 1000;

    bool disableSomeTopology = false;
    bool allowDebugAttach = false;
    bool allowDebugAttachCallBase = false;
    uint32_t passedContextDebugId = std::numeric_limits<uint32_t>::max();

    uint32_t receivedContextCreateFlags = 0;
    uint32_t receivedCreateContextId = 0;
    uint32_t receivedDestroyContextId = 0;
    uint32_t ioctlCallsCount = 0;

    uint32_t receivedContextParamRequestCount = 0;
    drm_i915_gem_context_param receivedContextParamRequest = {};

    //DRM_IOCTL_I915_GEM_EXECBUFFER2
    drm_i915_gem_execbuffer2 execBuffer = {0};
    uint64_t bbFlags;

    //DRM_IOCTL_I915_GEM_CREATE
    __u64 createParamsSize = 0;
    __u32 createParamsHandle = 0;
    //DRM_IOCTL_I915_GEM_SET_TILING
    __u32 setTilingMode = 0;
    __u32 setTilingHandle = 0;
    __u32 setTilingStride = 0;
    //DRM_IOCTL_PRIME_FD_TO_HANDLE
    __u32 outputHandle = 0;
    __s32 inputFd = 0;
    int fdToHandleRetVal = 0;
    //DRM_IOCTL_HANDLE_TO_FD
    __s32 outputFd = 0;
    //DRM_IOCTL_I915_GEM_USERPTR
    __u32 returnHandle = 0;
    __u64 gpuMemSize = 3u * MemoryConstants::gigaByte;
    //DRM_IOCTL_I915_GEM_MMAP
    uint64_t lockedPtr[4];
    //DRM_IOCTL_I915_QUERY
    drm_i915_query_item storedQueryItem = {};

    uint64_t storedGTTSize = 1ull << 47;
    uint64_t storedParamSseu = ULONG_MAX;

    virtual int handleRemainingRequests(unsigned long request, void *arg) { return -1; }
};

class DrmMockNonFailing : public DrmMock {
  public:
    using DrmMock::DrmMock;
    int handleRemainingRequests(unsigned long request, void *arg) override { return 0; }
};

class DrmMockEngine : public DrmMock {
  public:
    uint32_t i915QuerySuccessCount = std::numeric_limits<uint32_t>::max();
    uint32_t queryEngineInfoSuccessCount = std::numeric_limits<uint32_t>::max();

    DrmMockEngine(RootDeviceEnvironment &rootDeviceEnvironment) : DrmMock(rootDeviceEnvironment) {}

    int handleRemainingRequests(unsigned long request, void *arg) override;

    void handleQueryItem(drm_i915_query_item *queryItem);
};

class DrmMockResources : public DrmMock {
  public:
    DrmMockResources(RootDeviceEnvironment &rootDeviceEnvironment) : DrmMock(mockFd, rootDeviceEnvironment) {
        setBindAvailable();
    }

    bool registerResourceClasses() override {
        registerClassesCalled = true;
        return true;
    }

    uint32_t registerResource(ResourceClass classType, const void *data, size_t size) override {
        registeredClass = classType;
        memcpy_s(registeredData, sizeof(registeredData), data, size);
        registeredDataSize = size;
        return registerResourceReturnHandle;
    }

    void unregisterResource(uint32_t handle) override {
        unregisterCalledCount++;
        unregisteredHandle = handle;
    }

    uint32_t registerIsaCookie(uint32_t isaHanlde) override {
        return currentCookie++;
    }

    bool isVmBindAvailable() override {
        return bindAvailable;
    }

    static const uint32_t registerResourceReturnHandle;

    uint32_t unregisteredHandle = 0;
    uint32_t unregisterCalledCount = 0;
    ResourceClass registeredClass = ResourceClass::MaxSize;
    bool registerClassesCalled = false;
    uint64_t registeredData[128];
    size_t registeredDataSize;
    uint32_t currentCookie = 2;
};

extern std::map<unsigned long, const char *> ioctlCodeStringMap;
extern std::map<int, const char *> ioctlParamCodeStringMap;