#!/usr/bin/env bash

# Copyright Materialize, Inc. and contributors. All rights reserved.
#
# Use of this software is governed by the Business Source License
# included in the LICENSE file at the root of this repository.
#
# As of the Change Date specified in that file, in accordance with
# the Business Source License, use of this software will be governed
# by the Apache License, Version 2.0.

set -euo pipefail

if [[ $# -lt 1 ]]
then
    echo "usage: $0 <command>

Generates shell completion for all available tools.

Commands:
    generate    generates and writes shell completion to ../misc/completions
    check       checks whether all shell completion scripts are up-to-date"
    exit 1
fi

cmd=$1 && shift

directory="$(dirname "$0")"

supported_shells=(bash zsh)
python_autocompletions=(scratch)

. misc/shlib/shlib.bash

case "$cmd" in
    generate)
        for name in "${python_autocompletions[@]}"; do
          for shell in "${supported_shells[@]}"; do
            mkdir -p "$directory"/../misc/completions/"$shell"
            "$directory"/pyactivate -m materialize.cli."$name" completion "$shell" > "$directory"/../misc/completions/"$shell"/_"$name"
          done
        done
        ;;
    check)
        shasum=sha1sum
        if ! command_exists "$shasum"; then
            shasum=shasum
        fi

        for name in "${python_autocompletions[@]}"; do
          for shell in "${supported_shells[@]}"; do
            if [ ! -f "$directory/../misc/completions/$shell/_$name" ]; then
              printf "missing shell completion scripts. try running \`bin/gen-completion generate\` and checking in the changes\n"
              exit 1
            fi

            latest=$("$directory"/pyactivate -m materialize.cli."$name" completion "$shell" | "$shasum")
            existing=$("$shasum" < "$directory"/../misc/completions/"$shell"/_"$name")

            if [[ "$latest" != "$existing" ]]; then
              printf "shell completion scripts have uncommitted changes. try running \`bin/gen-completion generate\` and checking in the changes\n"
              exit 1
            fi
          done
        done
        ;;
    *)
        printf "unknown command %q\n" "$cmd"
        exit 1
        ;;
esac