/*
 * Copyright 2022-present MongoDB, 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.
 */

#ifndef MC_FLE2_FIND_RANGE_PAYLOAD_PRIVATE_H
#define MC_FLE2_FIND_RANGE_PAYLOAD_PRIVATE_H

#include "mongocrypt-buffer-private.h"
#include "mongocrypt-private.h"
#include "mongocrypt.h"

#include "mc-array-private.h"
#include "mc-fle2-range-operator-private.h"

/** FLE2FindRangePayloadEdgesInfo represents the token information for a range
 * find query. It is encoded inside an FLE2FindRangePayload. See
 * https://github.com/mongodb/mongo/blob/master/src/mongo/crypto/fle_field_schema.idl
 * for the representation in the MongoDB server.
 */
typedef struct {
    mc_array_t edgeFindTokenSetArray;           // g
    _mongocrypt_buffer_t serverEncryptionToken; // e
    int64_t maxContentionFactor;                // cm
} mc_FLE2FindRangePayloadEdgesInfo_t;

/**
 * FLE2FindRangePayload represents an FLE2 payload of a range indexed field to
 * query. It is created client side.
 *
 * FLE2FindRangePayload has the following data layout:
 *
 * struct {
 *   uint8_t fle_blob_subtype = 10;
 *   uint8_t bson[];
 * } FLE2FindRangePayload;
 *
 * bson is a BSON document of this form:
 * g: array<EdgeFindTokenSet> // Array of Edges
 * e: <binary> // ServerDataEncryptionLevel1Token
 * cm: <int64> // Queryable Encryption max contentionFactor
 */
typedef struct {
    struct {
        mc_FLE2FindRangePayloadEdgesInfo_t value;
        bool set;
    } payload;

    // payloadId Id of payload - must be paired with another payload.
    int32_t payloadId;
    // firstOperator represents the first query operator for which this payload
    // was generated.
    mc_FLE2RangeOperator_t firstOperator;
    // secondOperator represents the second query operator for which this payload
    // was generated. Only populated for two-sided ranges. It is 0 if unset.
    mc_FLE2RangeOperator_t secondOperator;
} mc_FLE2FindRangePayload_t;

/**
 * EdgeFindTokenSet is the following BSON document:
 * d: <binary> // EDCDerivedFromDataTokenAndContentionFactor
 * s: <binary> // ESCDerivedFromDataTokenAndContentionFactor
 * c: <binary> // ECCDerivedFromDataTokenAndContentionFactor
 *
 * Instances of mc_EdgeFindTokenSet_t are expected to be owned by
 * mc_FLE2FindRangePayload_t and are freed in
 * mc_FLE2FindRangePayload_cleanup.
 */
typedef struct {
    _mongocrypt_buffer_t edcDerivedToken; // d
    _mongocrypt_buffer_t escDerivedToken; // s
    _mongocrypt_buffer_t eccDerivedToken; // c
} mc_EdgeFindTokenSet_t;

void mc_FLE2FindRangePayload_init(mc_FLE2FindRangePayload_t *payload);

bool mc_FLE2FindRangePayload_serialize(const mc_FLE2FindRangePayload_t *payload, bson_t *out);

void mc_FLE2FindRangePayload_cleanup(mc_FLE2FindRangePayload_t *payload);

#endif /* MC_FLE2_FIND_RANGE_PAYLOAD_PRIVATE_H */