#!/usr/bin/env bash
set -euo pipefail

if [[ $# -ne 3 ]]; then
	echo "Usage: $0 /path/to/server-linux-x86_64 GAME_VERSION GAME_COMMIT" >&2
	exit 2
fi

source_dir="${1%/}"
game_version="$2"
game_commit="${3,,}"
repository_dir="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/.." && pwd)"
destination_dir="${repository_dir}/dist"
licenses_dir="${destination_dir}/licenses"
packaging_commit="$(git -C "${repository_dir}" rev-parse HEAD)"

if ! git -C "${repository_dir}" diff --quiet \
	|| ! git -C "${repository_dir}" diff --cached --quiet; then
	echo "Commit dedicated packaging changes before staging a release." >&2
	exit 1
fi

if [[ ! "${game_version}" =~ ^[A-Za-z0-9][A-Za-z0-9._-]*$ ]]; then
	echo "GAME_VERSION must contain only letters, numbers, dots, underscores, or hyphens." >&2
	exit 2
fi
if [[ ! "${game_commit}" =~ ^[0-9a-f]{40}$ ]]; then
	echo "GAME_COMMIT must be the full 40-character Git commit." >&2
	exit 2
fi
if [[ ! "${packaging_commit}" =~ ^[0-9a-f]{40}$ ]]; then
	echo "Could not resolve the dedicated packaging Git commit." >&2
	exit 2
fi

for filename in NETfishingServer.x86_64 NETfishingServer.pck; do
	if [[ ! -f "${source_dir}/${filename}" ]]; then
		echo "Missing ${source_dir}/${filename}" >&2
		exit 1
	fi
done

install -m 0755 "${source_dir}/NETfishingServer.x86_64" \
	"${destination_dir}/NETfishingServer.x86_64"
install -m 0644 "${source_dir}/NETfishingServer.pck" \
	"${destination_dir}/NETfishingServer.pck"
rm -rf -- "${licenses_dir}"
install -d -m 0755 "${licenses_dir}"
install -m 0644 "${repository_dir}/LICENSE" \
	"${licenses_dir}/GPL-3.0-or-later.txt"
install -m 0644 "${repository_dir}/ASSET-LICENSE.md" \
	"${licenses_dir}/ASSET-LICENSE.md"
install -m 0644 "${repository_dir}/THIRD-PARTY-NOTICES.md" \
	"${licenses_dir}/THIRD-PARTY-NOTICES.md"
install -m 0644 "${repository_dir}/TRADEMARKS.md" \
	"${licenses_dir}/TRADEMARKS.md"
install -m 0644 "${repository_dir}/CREDITS.md" \
	"${licenses_dir}/CREDITS.md"

cd -- "${destination_dir}"
executable_sha256="$(sha256sum NETfishingServer.x86_64 | awk '{print $1}')"
pck_sha256="$(sha256sum NETfishingServer.pck | awk '{print $1}')"

apply_umask="$(umask)"
umask 022
printf '%s\n' \
	"manifest_version=2" \
	"game_version=${game_version}" \
	"game_commit=${game_commit}" \
	"packaging_commit=${packaging_commit}" \
	"export_preset=Linux Dedicated Server" \
	"platform=linux-x86_64" \
	"executable_sha256=${executable_sha256}" \
	"pck_sha256=${pck_sha256}" \
	> BUILD_INFO
cat >SOURCE-CODE.md <<EOF
# Corresponding source

NETfishing dedicated game-server code is licensed under GPL-3.0-or-later.

Source repository: https://forge.makearmy.io/woofmeow/netfishing
Exact game source revision: ${game_commit}

Packaging source:
https://forge.makearmy.io/woofmeow/netfishing-dedicated-server
Exact packaging source revision: ${packaging_commit}
EOF
umask "${apply_umask}"
sha256sum \
	NETfishingServer.x86_64 \
	NETfishingServer.pck \
	BUILD_INFO \
	SOURCE-CODE.md \
	licenses/GPL-3.0-or-later.txt \
	licenses/ASSET-LICENSE.md \
	licenses/THIRD-PARTY-NOTICES.md \
	licenses/TRADEMARKS.md \
	licenses/CREDITS.md \
	> SHA256SUMS
echo "Staged dedicated server build in ${destination_dir}"