#!/bin/sh
# XXX: This should be removed when elixir's releases get custom command support

detect_flavour() {
	arch="$(uname -m)"
	if [ "$arch" = "x86_64" ]; then
		arch="amd64"
	elif [ "$arch" = "armv7l" ]; then
		arch="arm"
	elif [ "$arch" = "aarch64" ]; then
		arch="arm64"
	else
		echo "Unsupported arch: $arch" >&2
		exit 1
	fi

	if getconf GNU_LIBC_VERSION >/dev/null; then
		libc_postfix=""
	elif [ "$(ldd 2>&1 | head -c 9)" = "musl libc" ]; then
		libc_postfix="-musl"
	elif [ "$(find /lib/libc.musl* | wc -l)" ]; then
		libc_postfix="-musl"
	else
		echo "Unsupported libc" >&2
		exit 1
	fi

	echo "$arch$libc_postfix"
}

detect_branch() {
	version="$(cut -d' ' -f2 <"$RELEASE_ROOT"/releases/start_erl.data)"
	# Expected format: major.minor.patch_version(-number_of_commits_ahead_of_tag-gcommit_hash).branch
	branch="$(echo "$version" | cut -d'.' -f 4)"
	if [ "$branch" = "develop" ]; then
		echo "develop"
	elif [ "$branch" = "" ]; then
		echo "master"
	else
	  # Note: branch name in version is of SemVer format and may only contain [0-9a-zA-Z-] symbols —
	  #   if supporting releases for more branches, need to ensure they contain only these symbols.
		echo "Releases are built only for master and develop branches" >&2
		exit 1
	fi
}
update() {
	set -e
	RELEASE_ROOT=$(dirname "$SCRIPTPATH")
	uri="${PLEROMA_CTL_URI:-https://git.pleroma.social}"
	project_id="${PLEROMA_CTL_PROJECT_ID:-2}"
	project_branch="$(detect_branch)"
	flavour="${PLEROMA_CTL_FLAVOUR:-$(detect_flavour)}"
	echo "Detected flavour: $flavour"
	tmp="${PLEROMA_CTL_TMP_DIR:-/tmp}"
	artifact="$tmp/pleroma.zip"
	full_uri="${uri}/api/v4/projects/${project_id}/jobs/artifacts/${project_branch}/download?job=${flavour}"
	echo "Downloading the artifact from ${full_uri} to ${artifact}"
	curl "$full_uri" -o "${artifact}"
	echo "Unpacking ${artifact} to ${tmp}"
	unzip -q "$artifact" -d "$tmp"
	echo "Copying files over to $RELEASE_ROOT"
	if [ "$1" != "--no-rm" ]; then
		rm -r "${RELEASE_ROOT:-?}"/*
	fi
	cp -rf "$tmp/release"/* "$RELEASE_ROOT"
	echo "Removing temporary files"
	rm -r "$tmp/release"
	rm "$artifact"
	echo "Done! Please refer to the changelog/release notes for changes and update instructions"
	set +e
}

if [ -z "$1" ] || [ "$1" = "help" ]; then
	# TODO: Just list the commands on `pleroma_ctl help` and output help for the individual command on `pleroma_ctl help $COMMAND`
	echo "Usage: $(basename "$0") COMMAND [ARGS]

    The known commands are:

        create
	  Create database schema (needs to be executed only once)

        migrate
	  Execute database migrations (needs to be done after updates)

        rollback [VERSION]
	  Rollback database migrations (needs to be done before downgrading)

	update [OPTIONS]
	  Update the instance using the latest CI artifact for the current branch.

	  The only supported option is --no-rm, when set the script won't delete the whole directory, but
	  just force copy over files from the new release. This wastes more space, but may be useful if
	  some files are stored inside of the release directories (although you really shouldn't store them
	  there), or if you want to be able to quickly revert a broken update.

	  The script will try to detect your architecture and ABI and set a flavour automatically,
	  but if it is wrong, you can overwrite it by setting PLEROMA_CTL_FLAVOUR to the desired flavour.

	  By default the artifact will be downloaded from https://git.pleroma.social for pleroma/pleroma (project id: 2)
	  to /tmp/, you can overwrite these settings by setting PLEROMA_CTL_URI, PLEROMA_CTL_PROJECT_ID and PLEROMA_CTL_TMP_DIR
	  respectively.


    and any mix tasks under Pleroma namespace, for example \`mix pleroma.user COMMAND\` is
    equivalent to \`$(basename "$0") user COMMAND\`

    By default pleroma_ctl will try calling into a running instance to execute non migration-related commands,
    if for some reason this is undesired, set PLEROMA_CTL_RPC_DISABLED environment variable
"
else
	SCRIPT=$(readlink -f "$0")
	SCRIPTPATH=$(dirname "$SCRIPT")

	if [ "$1" = "update" ]; then
		update "$2"
	elif [ "$1" = "migrate" ] || [ "$1" = "rollback" ] || [ "$1" = "create" ] || [ "$1 $2" = "instance gen" ] || [ -n "$PLEROMA_CTL_RPC_DISABLED" ]; then
		"$SCRIPTPATH"/pleroma eval 'Pleroma.ReleaseTasks.run("'"$*"'")'
	else
		"$SCRIPTPATH"/pleroma rpc 'Pleroma.ReleaseTasks.run("'"$*"'")'
	fi
fi
