/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2015-2022 Advanced Micro Devices, Inc. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#ifndef MIGRAPHX_GUARD_MIGRAPHLIB_TARGET_HPP
#define MIGRAPHX_GUARD_MIGRAPHLIB_TARGET_HPP

#include <cassert>
#include <string>
#include <functional>
#include <memory>
#include <type_traits>
#include <utility>
#include <vector>
#include <migraphx/context.hpp>
#include <migraphx/pass.hpp>
#include <migraphx/config.hpp>
#include <migraphx/compile_options.hpp>
#include <migraphx/argument.hpp>
#include <migraphx/rank.hpp>
#include <migraphx/support_metric.hpp>
#include <migraphx/instruction_ref.hpp>

namespace migraphx {
inline namespace MIGRAPHX_INLINE_NS {

#ifdef DOXYGEN

/// An interface for a compilation target
struct target
{
    /// A unique name used to identify the target
    std::string name() const;
    /**
     * @brief The transformation pass to be run during compilation.
     *
     * @param ctx This is the target-dependent context that is created by `get_context`
     * @param options Compiling options passed in by the user
     * @return The passes to be ran
     */
    std::vector<pass> get_passes(context& ctx, const compile_options& options) const;
    /**
     * @brief Construct a context for the target.
     * @return The context to be used during compilation and execution.
     */
    context get_context() const;
    /**
     * @brief Check how well an instruction is supported on a target with the given metric
     * @param ins Instruction to check if it's supported
     * @param metric Used to define how the return value should be interpreted
     * @return The value based on the chosen metric. Negative numbers mean unsupported
     */
    float is_supported(T&, instruction_ref ins, support_metric m) const;
    /**
     * @brief copy an argument to the current target.
     *
     * @param arg Input argument to be copied to the target
     * @return Argument in the target.
     */
    argument copy_to(const argument& arg) const;
    /**
     * @brief copy an argument from the current target.
     *
     * @param arg Input argument to be copied from the target
     * @return Argument in the host.
     */
    argument copy_from(const argument& arg) const;
    /**
     * @brief Allocate an argument based on the input shape
     *
     * @param s Shape of the argument to be allocated in the target
     * @return Allocated argument in the target.
     */
    argument allocate(const shape& s) const;
};

#else

template <class T>
argument target_allocate(T& x, const shape&)
{
    std::string name = x.name();
    MIGRAPHX_THROW("Not computable: " + name);
}

template <class T>
argument copy_to_target(T&, const argument& arg)
{
    return arg;
}

template <class T>
argument copy_from_target(T&, const argument& arg)
{
    return arg;
}

template <class T>
float target_is_supported(T&, instruction_ref, support_metric)
{
    return 0;
}

<%
interface('target',
     virtual('name', returns='std::string', const=True),
     virtual('get_passes', ctx='context&', options='const compile_options&', returns='std::vector<pass>', const=True),
     virtual('get_context', returns='context', const=True),
     virtual('is_supported', returns='float', ins='instruction_ref', m='support_metric', const=True, default='target_is_supported'),
     virtual('copy_to',
             returns = 'argument',
             input   = 'const argument&',
             const   = True,
             default = 'copy_to_target'),
     virtual('copy_from',
             returns = 'argument',
             input   = 'const argument&',
             const   = True,
             default = 'copy_from_target'),
    virtual('allocate', s='const shape&', returns='argument', const=True,
             default = 'target_allocate')
)
%>

#endif

} // namespace MIGRAPHX_INLINE_NS
} // namespace migraphx

#endif
