/**
 * Copyright (c) 2025 Huawei Technologies Co., Ltd.
 * This program is free software, you can redistribute it and/or modify it under the terms and conditions of
 * CANN Open Software License Agreement Version 2.0 (the "License").
 * Please refer to the License for details. You may not use this file except in compliance with the License.
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED,
 * INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE.
 * See LICENSE in the root of the software repository for the full text of the License.
 */

#include "aclnn_gt_scalar.h"
#include "greater.h"
#include "aclnn_kernels/cast.h"
#include "aclnn_kernels/contiguous.h"
#include "aclnn/aclnn_base.h"
#include "opdev/common_types.h"
#include "opdev/data_type_utils.h"
#include "opdev/shape_utils.h"
#include "opdev/format_utils.h"
#include "opdev/op_dfx.h"
#include "opdev/op_executor.h"
#include "opdev/op_log.h"
#include "opdev/tensor_view_utils.h"
#include "opdev/platform.h"
#include "aclnn_kernels/common/op_error_check.h"
#include "op_api/aclnn_check.h"

using namespace op;
#ifdef __cplusplus
extern "C" {
#endif

// 根据API定义，需要列出所能支持的所有dtype
static const std::initializer_list<op::DataType> DTYPE_SUPPORT_910_LIST = {
    op::DataType::DT_FLOAT,  op::DataType::DT_INT32,  op::DataType::DT_INT64,  op::DataType::DT_FLOAT16,
    op::DataType::DT_INT16,  op::DataType::DT_INT8,   op::DataType::DT_UINT8,  op::DataType::DT_DOUBLE,
    op::DataType::DT_UINT64, op::DataType::DT_UINT16, op::DataType::DT_UINT32, op::DataType::DT_BOOL};

static const std::initializer_list<op::DataType> DTYPE_SUPPORT_910B_LIST = {
    op::DataType::DT_FLOAT,  op::DataType::DT_INT32,  op::DataType::DT_INT64,  op::DataType::DT_FLOAT16,
    op::DataType::DT_INT16,  op::DataType::DT_INT8,   op::DataType::DT_UINT8,  op::DataType::DT_DOUBLE,
    op::DataType::DT_UINT64, op::DataType::DT_UINT16, op::DataType::DT_UINT32, op::DataType::DT_BOOL,
    op::DataType::DT_BF16};

static const std::initializer_list<op::DataType> OUT_DTYPE_SUPPORT_910_LIST = {
    op::DataType::DT_FLOAT,     op::DataType::DT_INT32,     op::DataType::DT_INT64,  op::DataType::DT_FLOAT16,
    op::DataType::DT_INT16,     op::DataType::DT_INT8,      op::DataType::DT_UINT8,  op::DataType::DT_DOUBLE,
    op::DataType::DT_UINT64,    op::DataType::DT_UINT16,    op::DataType::DT_UINT32, op::DataType::DT_BOOL,
    op::DataType::DT_COMPLEX64, op::DataType::DT_COMPLEX128};

static const std::initializer_list<op::DataType> OUT_DTYPE_SUPPORT_910B_LIST = {
    op::DataType::DT_FLOAT,     op::DataType::DT_INT32,      op::DataType::DT_INT64,  op::DataType::DT_FLOAT16,
    op::DataType::DT_INT16,     op::DataType::DT_INT8,       op::DataType::DT_UINT8,  op::DataType::DT_DOUBLE,
    op::DataType::DT_UINT64,    op::DataType::DT_UINT16,     op::DataType::DT_UINT32, op::DataType::DT_BOOL,
    op::DataType::DT_COMPLEX64, op::DataType::DT_COMPLEX128, op::DataType::DT_BF16};

static const size_t DIM_BOUND = 8;

static inline double GetCastedDouble(const aclTensor* self, const aclScalar* other)
{
    double castedRes = 0;
    switch (self->GetDataType()) {
        case DataType::DT_FLOAT:
            castedRes = static_cast<double>(other->ToFloat());
            break;
        case DataType::DT_FLOAT16:
            castedRes = static_cast<double>(other->ToFp16());
            break;
        case DataType::DT_BF16:
            castedRes = static_cast<double>(other->ToBf16());
            break;
        default:
            castedRes = other->ToDouble();
            break;
    }
    return castedRes;
}

static inline bool IsDoubleEqual(double a, double b)
{
    if (std::abs(a - b) <= std::numeric_limits<float>::epsilon()) {
        return true;
    }
    return false;
}

static bool CheckNotNull(const aclTensor* self, const aclScalar* other, const aclTensor* out)
{
    OP_CHECK_NULL(self, return false);
    OP_CHECK_NULL(other, return false);
    OP_CHECK_NULL(out, return false);
    return true;
}

static bool CheckDtypeValid(const aclTensor* self, const aclScalar* other, const aclTensor* out)
{
    auto npuArch = op::GetCurrentPlatformInfo().GetCurNpuArch();
    bool is910bSocVersion = (npuArch == NpuArch::DAV_2201 || IsRegBase(npuArch));
    const std::initializer_list<op::DataType> DTYPE_SUPPORT_LIST =
        is910bSocVersion ? DTYPE_SUPPORT_910B_LIST : DTYPE_SUPPORT_910_LIST;
    const std::initializer_list<op::DataType> OUT_DTYPE_SUPPORT_LIST =
        is910bSocVersion ? OUT_DTYPE_SUPPORT_910B_LIST : OUT_DTYPE_SUPPORT_910_LIST;
    // 检查数据类型是否在支持列表内
    OP_CHECK_DTYPE_NOT_SUPPORT(self, DTYPE_SUPPORT_LIST, return false);
    OP_CHECK_DTYPE_NOT_SUPPORT(other, DTYPE_SUPPORT_LIST, return false);
    OP_CHECK_DTYPE_NOT_SUPPORT(out, OUT_DTYPE_SUPPORT_LIST, return false);
    return true;
}

static op::DataType InnerTypeToComplexType(const op::DataType input)
{
    switch (input) {
        case op::DataType::DT_BF16:
            // BFloat16 has range equivalent to Float,
            // so we map it to ComplexFloat.
            return op::DataType::DT_COMPLEX64;
        case op::DataType::DT_FLOAT16:
            return op::DataType::DT_COMPLEX32;
        case op::DataType::DT_FLOAT:
            return op::DataType::DT_COMPLEX64;
        case op::DataType::DT_DOUBLE:
            return op::DataType::DT_COMPLEX128;
        case op::DataType::DT_COMPLEX32:
            return op::DataType::DT_COMPLEX32;
        case op::DataType::DT_COMPLEX64:
            return op::DataType::DT_COMPLEX64;
        case op::DataType::DT_COMPLEX128:
            return op::DataType::DT_COMPLEX128;
        default:
            OP_LOGE(ACLNN_ERR_PARAM_INVALID, "Unknown Complex ScalarType for [%s]", ToString(input).GetString());
            return op::DataType::DT_UNDEFINED;
    }
}

static op::DataType CombineCategoriesWithComplex(const op::DataType higher, const op::DataType lower)
{
    if (IsComplexType(higher)) {
        return higher;
    } else if (IsComplexType(lower)) {
        // preserve value type of higher if it is floating type.
        if (IsFloatingType(higher)) {
            return InnerTypeToComplexType(higher);
        }
        // in case of integral input
        // lower complex takes precedence.
        return lower;
    } else if (IsFloatingType(higher)) {
        return higher;
    }
    if (higher == op::DataType::DT_BOOL || IsFloatingType(lower)) {
        return op::PromoteType(higher, lower);
    }
    if (higher != op::DataType::DT_UNDEFINED) {
        return higher;
    }
    return lower;
}

static op::DataType GetScalarDefaultDtype(const op::DataType input)
{
    if (IsComplexType(input)) {
        return op::DataType::DT_COMPLEX64;
    } else if (IsFloatingType(input)) {
        return op::DataType::DT_FLOAT;
    }
    return input;
}

static bool CheckPromoteType(const aclTensor* self, const aclScalar* other, const aclTensor* out, DataType& promoteType)
{
    // 类型提升判断，将提升后的数据类型返回
    auto npuArch = op::GetCurrentPlatformInfo().GetCurNpuArch();
    if (IsRegBase(npuArch)) {
        auto scalarDefaultDtype = GetScalarDefaultDtype(other->GetDataType());
        promoteType = CombineCategoriesWithComplex(self->GetDataType(), scalarDefaultDtype);
        if (promoteType == DataType::DT_BOOL) {
            promoteType = DataType::DT_INT8;
        }
        // 检查self的数据类型是否合规
        OP_CHECK_RESULT_DTYPE_CAST_FAILED(self->GetDataType(), promoteType, return false);
        // 检查other的数据类型是否合规
        OP_CHECK_RESULT_DTYPE_CAST_FAILED(other->GetDataType(), promoteType, return false);
    } else {
        promoteType = PromoteType(self->GetDataType(), other->GetDataType());
        // 如果有经过评审可以进行的转换，在这里添加并修改promoteType的值
        if (promoteType == DataType::DT_BOOL) {
            promoteType = DataType::DT_INT8;
        }
        if (other->GetDataType() == DataType::DT_DOUBLE && IsFloatingType(self->GetDataType())) {
            double afterCast = GetCastedDouble(self, other);
            promoteType = IsDoubleEqual(afterCast, other->ToDouble()) ? self->GetDataType() : promoteType;
        }
    }

    if (promoteType == DataType::DT_UNDEFINED) {
        OP_LOGE(
            ACLNN_ERR_PARAM_INVALID, "Self dtype %s and other dtype %s can not promote dtype.",
            ToString(self->GetDataType()).GetString(), ToString(other->GetDataType()).GetString());
        return false;
    }

    // 检查计算结果的数据类型能否转换为输出的数据类型
    OP_CHECK_RESULT_DTYPE_CAST_FAILED(DataType::DT_BOOL, out->GetDataType(), return false);
    return true;
}

static bool CheckShape(const aclTensor* self, const aclTensor* out)
{
    OP_CHECK_MAX_DIM(self, DIM_BOUND, return false);
    OP_CHECK_MAX_DIM(out, DIM_BOUND, return false);
    OP_CHECK_SHAPE_NOT_EQUAL(out, self, return false);
    return true;
}

static aclnnStatus CheckParams(
    const aclTensor* self, const aclScalar* other, const aclTensor* out, DataType& promoteType)
{
    // 1. 检查参数是否为空指针
    CHECK_RET(CheckNotNull(self, other, out), ACLNN_ERR_PARAM_NULLPTR);

    // 2. 检查输入的数据类型是否在API支持的数据类型范围之内，需要根据api定义校验
    CHECK_RET(CheckDtypeValid(self, other, out), ACLNN_ERR_PARAM_INVALID);

    // 3. 检查self和other的数据类型能否提升
    CHECK_RET(CheckPromoteType(self, other, out, promoteType), ACLNN_ERR_PARAM_INVALID);

    // 4. 检查shape是否满足约束
    CHECK_RET(CheckShape(self, out), ACLNN_ERR_PARAM_INVALID);

    return ACLNN_SUCCESS;
}

aclnnStatus aclnnGtScalarCommon(
    const aclTensor* self, const aclScalar* other, aclTensor* out, uint64_t* workspaceSize, aclOpExecutor** executor)
{
    // 固定写法，创建OpExecutor
    auto uniqueExecutor = CREATE_EXECUTOR();
    CHECK_RET(uniqueExecutor.get() != nullptr, ACLNN_ERR_INNER_CREATE_EXECUTOR);

    // 固定写法，参数检查
    DataType promoteType;
    auto ret = CheckParams(self, other, out, promoteType);
    CHECK_RET(ret == ACLNN_SUCCESS, ret);

    // 空Tensor处理
    if (self->IsEmpty()) {
        *workspaceSize = 0;
        uniqueExecutor.ReleaseTo(executor);
        return ACLNN_SUCCESS;
    }

    const aclTensor* selfProcessed = nullptr;
    if (self->GetDataType() == promoteType && l0op::IsGreaterSupportNonContiguous(self)) {
        selfProcessed = uniqueExecutor.get()->CreateView(
            self, self->GetViewShape(), self->GetStorageShape(), self->GetViewStrides(), self->GetViewOffset());
    } else {
        // self如果非连续，需要转连续
        auto selfContiguous = l0op::Contiguous(self, uniqueExecutor.get());
        CHECK_RET(selfContiguous != nullptr, ACLNN_ERR_INNER_NULLPTR);

        // 将输入self的数据类型转换成推导后的数据类型
        selfProcessed = l0op::Cast(selfContiguous, promoteType, uniqueExecutor.get());
    }

    CHECK_RET(selfProcessed != nullptr, ACLNN_ERR_INNER_NULLPTR);

    // 将other转换为tensor，并且数据类型转换为推导后的数据类型
    auto otherTensor = uniqueExecutor.get()->ConvertToTensor(other, promoteType);
    CHECK_RET(otherTensor != nullptr, ACLNN_ERR_INNER_NULLPTR);

    // 调用l0算子GreaterEqual进行计算
    auto GreaterEqualResult = l0op::Greater(selfProcessed, otherTensor, uniqueExecutor.get());
    CHECK_RET(GreaterEqualResult != nullptr, ACLNN_ERR_INNER_NULLPTR);

    // 将输入self的数据类型转换成推导后的数据类型
    auto GEResultCasted = l0op::Cast(GreaterEqualResult, out->GetDataType(), uniqueExecutor.get());
    CHECK_RET(GEResultCasted != nullptr, ACLNN_ERR_INNER_NULLPTR);

    // 如果出参out是非连续Tensor，需要把计算完的连续Tensor转非连续
    auto viewCopyResult = l0op::ViewCopy(GEResultCasted, out, uniqueExecutor.get());
    CHECK_RET(viewCopyResult != nullptr, ACLNN_ERR_INNER_NULLPTR);

    // 固定写法，获取计算过程中需要使用的workspace大小
    *workspaceSize = uniqueExecutor->GetWorkspaceSize();
    uniqueExecutor.ReleaseTo(executor);
    return ACLNN_SUCCESS;
}

aclnnStatus aclnnGtScalarGetWorkspaceSize(
    const aclTensor* self, const aclScalar* other, aclTensor* out, uint64_t* workspaceSize, aclOpExecutor** executor)
{
    L2_DFX_PHASE_1(aclnnGtScalar, DFX_IN(self, other), DFX_OUT(out));
    return aclnnGtScalarCommon(self, other, out, workspaceSize, executor);
}

aclnnStatus aclnnGtScalar(void* workspace, uint64_t workspaceSize, aclOpExecutor* executor, aclrtStream stream)
{
    L2_DFX_PHASE_2(aclnnGtScalar);
    // 固定写法，调用框架能力，完成计算
    return CommonOpExecutorRun(workspace, workspaceSize, executor, stream);
}

aclnnStatus aclnnInplaceGtScalarGetWorkspaceSize(
    aclTensor* selfRef, const aclScalar* other, uint64_t* workspaceSize, aclOpExecutor** executor)
{
    L2_DFX_PHASE_1(aclnnInplaceGtScalar, DFX_IN(selfRef, other), DFX_OUT(selfRef));
    return aclnnGtScalarCommon(selfRef, other, selfRef, workspaceSize, executor);
}

aclnnStatus aclnnInplaceGtScalar(void* workspace, uint64_t workspaceSize, aclOpExecutor* executor, aclrtStream stream)
{
    L2_DFX_PHASE_2(aclnnInplaceGtScalar);
    // 固定写法，调用框架能力，完成计算
    return CommonOpExecutorRun(workspace, workspaceSize, executor, stream);
}

#ifdef __cplusplus
}
#endif