/* -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
 *   Copyright 2020-Present Couchbase, Inc.
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */

#include <couchbase/error_codes.hxx>
#include <couchbase/subdoc/mutate_in_macro.hxx>

#include <cstdint>
#include <string>

namespace couchbase::subdoc
{
auto
to_mutate_in_macro(std::string_view input) -> std::optional<couchbase::subdoc::mutate_in_macro>
{
    if (input == "\"${Mutation.CAS}\"") {
        return couchbase::subdoc::mutate_in_macro::cas;
    }
    if (input == "\"${Mutation.seqno}\"") {
        return couchbase::subdoc::mutate_in_macro::sequence_number;
    }
    if (input == "\"${Mutation.value_crc32c}\"") {
        return couchbase::subdoc::mutate_in_macro::value_crc32c;
    }
    return {};
}

auto
to_binary(couchbase::subdoc::mutate_in_macro value) -> std::vector<std::byte>
{
    // echo -n '"${Mutation.CAS}"' | ruby -e 'puts ARGF.read.chars.map{|c| format("std::byte{0x%02x}", c.ord)}.join(", ")'
    static std::vector cas_bytes{
        std::byte{ 0x22 }, std::byte{ 0x24 }, std::byte{ 0x7b }, std::byte{ 0x4d }, std::byte{ 0x75 }, std::byte{ 0x74 },
        std::byte{ 0x61 }, std::byte{ 0x74 }, std::byte{ 0x69 }, std::byte{ 0x6f }, std::byte{ 0x6e }, std::byte{ 0x2e },
        std::byte{ 0x43 }, std::byte{ 0x41 }, std::byte{ 0x53 }, std::byte{ 0x7d }, std::byte{ 0x22 },
    };

    // echo -n '"${Mutation.seqno}"' | ruby -e 'puts ARGF.read.chars.map{|c| format("std::byte{0x%02x}", c.ord)}.join(", ")'
    static std::vector seqno_bytes{
        std::byte{ 0x22 }, std::byte{ 0x24 }, std::byte{ 0x7b }, std::byte{ 0x4d }, std::byte{ 0x75 }, std::byte{ 0x74 }, std::byte{ 0x61 },
        std::byte{ 0x74 }, std::byte{ 0x69 }, std::byte{ 0x6f }, std::byte{ 0x6e }, std::byte{ 0x2e }, std::byte{ 0x73 }, std::byte{ 0x65 },
        std::byte{ 0x71 }, std::byte{ 0x6e }, std::byte{ 0x6f }, std::byte{ 0x7d }, std::byte{ 0x22 },
    };

    // echo -n '"${Mutation.value_crc32c}"' | ruby -e 'puts ARGF.read.chars.map{|c| format("std::byte{0x%02x}", c.ord)}.join(", ")'
    static std::vector crc32_bytes{
        std::byte{ 0x22 }, std::byte{ 0x24 }, std::byte{ 0x7b }, std::byte{ 0x4d }, std::byte{ 0x75 }, std::byte{ 0x74 }, std::byte{ 0x61 },
        std::byte{ 0x74 }, std::byte{ 0x69 }, std::byte{ 0x6f }, std::byte{ 0x6e }, std::byte{ 0x2e }, std::byte{ 0x76 }, std::byte{ 0x61 },
        std::byte{ 0x6c }, std::byte{ 0x75 }, std::byte{ 0x65 }, std::byte{ 0x5f }, std::byte{ 0x63 }, std::byte{ 0x72 }, std::byte{ 0x63 },
        std::byte{ 0x33 }, std::byte{ 0x32 }, std::byte{ 0x63 }, std::byte{ 0x7d }, std::byte{ 0x22 },
    };

    switch (value) {
        case couchbase::subdoc::mutate_in_macro::cas:
            return cas_bytes;
        case couchbase::subdoc::mutate_in_macro::sequence_number:
            return seqno_bytes;
        case couchbase::subdoc::mutate_in_macro::value_crc32c:
            return crc32_bytes;
    }
    throw std::system_error(errc::common::invalid_argument,
                            "Unexpected mutate_in macro: " + std::to_string(static_cast<std::uint32_t>(value)));
}
} // namespace couchbase::subdoc