#!/bin/bash
##===----------------------------------------------------------------------===##
##
## This source file is part of the RediStack open source project
##
## Copyright (c) 2023 RediStack project authors
## Licensed under Apache License v2.0
##
## See LICENSE.txt for license information
## See CONTRIBUTORS.txt for the list of RediStack project authors
##
## SPDX-License-Identifier: Apache-2.0
##
##===----------------------------------------------------------------------===##

set -eu

here="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

function genWithContextParameter() {
    how_many=$1

    if [[ $how_many -ne 1 ]] ; then
        echo ""
    fi

    echo "    @inlinable"
    echo -n "    mutating func encodeRESPArray<T0: RESP3BlobStringEncodable"
    for ((n = 1; n<how_many; n +=1)); do
        echo -n ", T$((n)): RESP3BlobStringEncodable"
    done

    echo -n ">(_ t0: T0"
    for ((n = 1; n<how_many; n +=1)); do
        echo -n ", _ t$((n)): T$((n))"
    done
    echo ") {"

  printf "        self.buffer.writeBytes(\"*%s\\r\\n\".utf8)\n" "$how_many"

    for ((n = 0; n<how_many; n +=1)); do
        echo "        t$((n)).encodeRedisBlobString(into: &self.buffer)"
    done
    echo "    }"
}

grep -q "ByteBuffer" "${BASH_SOURCE[0]}" || {
    echo >&2 "ERROR: ${BASH_SOURCE[0]}: file or directory not found (this should be this script)"
    exit 1
}

{
cat <<"EOF"
//===----------------------------------------------------------------------===//
//
// This source file is part of the RediStack open source project
//
// Copyright (c) 2023 Apple Inc. and the RediStack project authors
// Licensed under Apache License v2.0
//
// See LICENSE.txt for license information
// See CONTRIBUTORS.txt for the list of RediStack project authors
//
// SPDX-License-Identifier: Apache-2.0
//
//===----------------------------------------------------------------------===//
//
// NOTE: THIS FILE IS AUTO-GENERATED BY scripts/generate_rediscommandencoder_multi_encode.sh
EOF
echo

echo "#if swift(<5.9)"
echo "extension RedisCommandEncoder {"

# note:
# - widening the inverval below (eg. going from {1..15} to {1..25}) is Semver minor
# - narrowing the interval below is SemVer _MAJOR_!
for n in {1..7}; do
    genWithContextParameter "$n"
done
echo "}"
echo "#endif"
} > "$here/../Sources/RediStack/RedisCommandEncoder-multi-encode.swift"