// Copyright 2020 The Matrix.org Foundation C.I.C.
//
// 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.

package tables

import (
	"context"
	"database/sql"
	"encoding/json"

	"github.com/matrix-org/dendrite/keyserver/api"
)

type OneTimeKeys interface {
	SelectOneTimeKeys(ctx context.Context, userID, deviceID string, keyIDsWithAlgorithms []string) (map[string]json.RawMessage, error)
	CountOneTimeKeys(ctx context.Context, userID, deviceID string) (*api.OneTimeKeysCount, error)
	InsertOneTimeKeys(ctx context.Context, keys api.OneTimeKeys) (*api.OneTimeKeysCount, error)
	// SelectAndDeleteOneTimeKey selects a single one time key matching the user/device/algorithm specified and returns the algo:key_id => JSON.
	// Returns an empty map if the key does not exist.
	SelectAndDeleteOneTimeKey(ctx context.Context, txn *sql.Tx, userID, deviceID, algorithm string) (map[string]json.RawMessage, error)
}

type DeviceKeys interface {
	SelectDeviceKeysJSON(ctx context.Context, keys []api.DeviceMessage) error
	InsertDeviceKeys(ctx context.Context, txn *sql.Tx, keys []api.DeviceMessage) error
	SelectMaxStreamIDForUser(ctx context.Context, txn *sql.Tx, userID string) (streamID int32, err error)
	CountStreamIDsForUser(ctx context.Context, userID string, streamIDs []int64) (int, error)
	SelectBatchDeviceKeys(ctx context.Context, userID string, deviceIDs []string) ([]api.DeviceMessage, error)
}

type KeyChanges interface {
	InsertKeyChange(ctx context.Context, partition int32, offset int64, userID string) error
	// SelectKeyChanges returns the set (de-duplicated) of users who have changed their keys between the two offsets.
	// Results are exclusive of fromOffset and inclusive of toOffset. A toOffset of sarama.OffsetNewest means no upper offset.
	SelectKeyChanges(ctx context.Context, partition int32, fromOffset, toOffset int64) (userIDs []string, latestOffset int64, err error)
}