// MIT License
//
// Copyright (c) 2023 ROCm Developer Tools
//
// 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.

#include <rocprofiler/context.h>
#include <rocprofiler/fwd.h>
#include <rocprofiler/rocprofiler.h>

#include "lib/rocprofiler/context/context.hpp"
#include "lib/rocprofiler/context/domain.hpp"
#include "lib/rocprofiler/hsa/hsa.hpp"
#include "lib/rocprofiler/registration.hpp"

#include <atomic>
#include <vector>

namespace
{
constexpr auto rocprofiler_context_none = ROCPROFILER_CONTEXT_NONE;
}

extern "C" {
rocprofiler_status_t
rocprofiler_create_context(rocprofiler_context_id_t* context_id)
{
    // always set to none first
    *context_id = rocprofiler_context_none;

    if(rocprofiler::registration::get_init_status() > -1)
        return ROCPROFILER_STATUS_ERROR_CONFIGURATION_LOCKED;

    auto cfg_id = rocprofiler::context::allocate_context();
    if(!cfg_id) return ROCPROFILER_STATUS_ERROR_CONTEXT_ERROR;
    *context_id = *cfg_id;
    return ROCPROFILER_STATUS_SUCCESS;
}

rocprofiler_status_t
rocprofiler_start_context(rocprofiler_context_id_t context_id)
{
    if(context_id.handle == rocprofiler_context_none.handle)
        return ROCPROFILER_STATUS_ERROR_CONTEXT_NOT_FOUND;

    // if currently finalizing or finalized, don't allow starting a context
    if(rocprofiler::registration::get_fini_status() != 0)
        return ROCPROFILER_STATUS_ERROR_CONFIGURATION_LOCKED;

    return rocprofiler::context::start_context(context_id);
}

rocprofiler_status_t
rocprofiler_stop_context(rocprofiler_context_id_t context_id)
{
    if(context_id.handle == rocprofiler_context_none.handle)
        return ROCPROFILER_STATUS_ERROR_CONTEXT_NOT_FOUND;

    return rocprofiler::context::stop_context(context_id);
}

rocprofiler_status_t
rocprofiler_context_is_active(rocprofiler_context_id_t context_id, int* status)
{
    *status = 0;

    if(context_id.handle == rocprofiler_context_none.handle)
        return ROCPROFILER_STATUS_ERROR_CONTEXT_NOT_FOUND;

    auto ctxs = std::vector<const rocprofiler::context::context*>{};
    for(const auto* itr : rocprofiler::context::get_active_contexts(ctxs))
    {
        if(itr && itr->context_idx == context_id.handle)
        {
            *status = 1;
            return ROCPROFILER_STATUS_SUCCESS;
        }
    }
    return ROCPROFILER_STATUS_ERROR_CONTEXT_NOT_FOUND;
}

rocprofiler_status_t
rocprofiler_context_is_valid(rocprofiler_context_id_t context_id, int* status)
{
    *status = 0;

    if(context_id.handle == rocprofiler_context_none.handle)
        return ROCPROFILER_STATUS_ERROR_CONTEXT_NOT_FOUND;

    for(const auto& itr : rocprofiler::context::get_registered_contexts())
    {
        if(itr && itr->context_idx == context_id.handle)
        {
            auto _ret = rocprofiler::context::validate_context(itr.get());
            *status   = (_ret == ROCPROFILER_STATUS_SUCCESS) ? 1 : 0;
            return _ret;
        }
    }
    return ROCPROFILER_STATUS_ERROR_CONTEXT_NOT_FOUND;
}
}