/* -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
 *   Copyright 2020-2021 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 "analytics_link_get_all.hxx"

#include "core/management/analytics_link_azure_blob_external_json.hxx"
#include "core/management/analytics_link_couchbase_remote_json.hxx"
#include "core/management/analytics_link_s3_external_json.hxx"
#include "core/utils/json.hxx"
#include "core/utils/url_codec.hxx"
#include "error_utils.hxx"

namespace couchbase::core::operations::management
{
std::error_code
analytics_link_get_all_request::encode_to(encoded_request_type& encoded, http_context& /* context */) const
{
    std::map<std::string, std::string> values{};

    encoded.headers["content-type"] = "application/x-www-form-urlencoded";
    encoded.headers["accept"] = "application/json";
    encoded.method = "GET";
    if (!link_type.empty()) {
        values["type"] = link_type;
    }
    if (std::count(dataverse_name.begin(), dataverse_name.end(), '/') == 0) {
        if (!dataverse_name.empty()) {
            values["dataverse"] = dataverse_name;
            if (!link_name.empty()) {
                values["name"] = link_name;
            }
        }
        encoded.path = "/analytics/link";
    } else {
        if (link_name.empty()) {
            encoded.path = fmt::format("/analytics/link/{}", utils::string_codec::v2::path_escape(dataverse_name));
        } else {
            encoded.path = fmt::format("/analytics/link/{}/{}", utils::string_codec::v2::path_escape(dataverse_name), link_name);
        }
    }
    if (!values.empty()) {
        encoded.path.append(fmt::format("?{}", utils::string_codec::v2::form_encode(values)));
    }
    return {};
}

analytics_link_get_all_response
analytics_link_get_all_request::make_response(error_context::http&& ctx, const encoded_response_type& encoded) const
{
    analytics_link_get_all_response response{ std::move(ctx) };
    if (!response.ctx.ec) {
        if (encoded.body.data().empty() && response.ctx.http_status == 200) {
            return response;
        }
        tao::json::value payload{};
        try {
            payload = utils::json::parse(encoded.body.data());
        } catch (const tao::pegtl::parse_error&) {
            auto colon = encoded.body.data().find(':');
            if (colon == std::string::npos) {
                response.ctx.ec = errc::common::parsing_failure;
                return response;
            }
            auto code = static_cast<std::uint32_t>(std::stoul(encoded.body.data()));
            auto msg = encoded.body.data().substr(colon + 1);
            response.errors.emplace_back(analytics_link_get_all_response::problem{ code, msg });
        }
        if (payload.is_object()) {
            response.status = payload.optional<std::string>("status").value_or("unknown");
            if (response.status != "success") {
                if (auto* errors = payload.find("errors"); errors != nullptr && errors->is_array()) {
                    for (const auto& error : errors->get_array()) {
                        analytics_link_get_all_response::problem err{
                            error.at("code").as<std::uint32_t>(),
                            error.at("msg").get_string(),
                        };
                        response.errors.emplace_back(err);
                    }
                }
            }
        } else if (payload.is_array()) {
            for (const auto& link : payload.get_array()) {
                if (const std::string& type_ = link.at("type").get_string(); type_ == "couchbase") {
                    response.couchbase.emplace_back(link.as<couchbase::core::management::analytics::couchbase_remote_link>());
                } else if (type_ == "s3") {
                    response.s3.emplace_back(link.as<couchbase::core::management::analytics::s3_external_link>());
                } else if (type_ == "azureblob") {
                    response.azure_blob.emplace_back(link.as<couchbase::core::management::analytics::azure_blob_external_link>());
                }
            }
        }
        bool link_not_found = false;
        bool dataverse_does_not_exist = false;
        for (const auto& err : response.errors) {
            switch (err.code) {
                case 24006: /* Link [string] does not exist */
                    link_not_found = true;
                    break;
                case 24034: /* Cannot find dataverse with name [string] */
                    dataverse_does_not_exist = true;
                    break;
            }
        }
        if (dataverse_does_not_exist) {
            response.ctx.ec = errc::analytics::dataverse_not_found;
        } else if (link_not_found) {
            response.ctx.ec = errc::analytics::link_not_found;
        } else if (response.ctx.http_status != 200) {
            response.ctx.ec = extract_common_error_code(encoded.status_code, encoded.body.data());
        }
    }
    return response;
}
} // namespace couchbase::core::operations::management
