//
// Copyright 2018 Pixar
//
// Licensed under the Apache License, Version 2.0 (the "Apache License")
// with the following modification; you may not use this file except in
// compliance with the Apache License and the following modification to it:
// Section 6. Trademarks. is deleted and replaced with:
//
// 6. Trademarks. This License does not grant permission to use the trade
//    names, trademarks, service marks, or product names of the Licensor
//    and its affiliates, except as required to comply with Section 4(c) of
//    the License and to reproduce the content of the NOTICE file.
//
// You may obtain a copy of the Apache License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the Apache License with the above modification is
// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the Apache License for the specific
// language governing permissions and limitations under the Apache License.
//
#include "pxr/pxr.h"
#include "pxr/usd/ar/defaultResolverContext.h"

#include "pxr/base/tf/diagnostic.h"
#include "pxr/base/tf/hash.h"
#include "pxr/base/tf/ostreamMethods.h"
#include "pxr/base/tf/pathUtils.h"
#include "pxr/base/tf/stringUtils.h"

#include <boost/functional/hash.hpp>

PXR_NAMESPACE_OPEN_SCOPE

ArDefaultResolverContext::ArDefaultResolverContext(
    const std::vector<std::string>& searchPath)
{
    _searchPath.reserve(searchPath.size());
    for (const std::string& p : searchPath) {
        if (p.empty()) {
            continue;
        }

        const std::string absPath = TfAbsPath(p);
        if (absPath.empty()) {
            TF_WARN(
                "Could not determine absolute path for search path prefix "
                "'%s'", p.c_str());
            continue;
        }

        _searchPath.push_back(absPath);
    }
}

bool
ArDefaultResolverContext::operator<(const ArDefaultResolverContext& rhs) const
{
    return _searchPath < rhs._searchPath;
}

bool 
ArDefaultResolverContext::operator==(const ArDefaultResolverContext& rhs) const
{
    return _searchPath == rhs._searchPath;
}

bool 
ArDefaultResolverContext::operator!=(const ArDefaultResolverContext& rhs) const
{
    return !(*this == rhs);
}

std::string 
ArDefaultResolverContext::GetAsString() const
{
    std::string result = "Search path: ";
    if (_searchPath.empty()) {
        result += "[ ]";
    }
    else {
        result += "[\n    ";
        result += TfStringJoin(_searchPath, "\n    ");
        result += "\n]";
    }
    return result;
}

size_t 
hash_value(const ArDefaultResolverContext& context)
{
    size_t hash = 0;
    for (const std::string& p : context.GetSearchPath()) {
        boost::hash_combine(hash, TfHash()(p));
    }
    return hash;
}

PXR_NAMESPACE_CLOSE_SCOPE