#!/bin/sh

set -e -f -u

# This comment is used to simplify checking local copies of the script.
# Bump this number every time a significant change is made to this
# script.
#
# AdGuard-Project-Version: 2

# TODO(a.garipov): Add pre-merge-commit.

# Only show interactive prompts if there a terminal is attached to
# stdout.  While this technically doesn't guarantee that reading from
# /dev/tty works, this should work reasonably well on all of our
# supported development systems and in most terminal emulators.
is_tty='0'
if [ -t '1' ]
then
	is_tty='1'
fi
readonly is_tty

# prompt is a helper that prompts the user for interactive input if that
# can be done.  If there is no terminal attached, it sleeps for two
# seconds, giving the programmer some time to react, and returns with
# a zero exit code.
prompt() {
	if [ "$is_tty" -eq '0' ]
	then
		sleep 2

		return 0
	fi

	while true
	do
		printf 'commit anyway? y/[n]: '
		read -r ans < /dev/tty

		case "$ans"
		in
		('y'|'Y')
			break
			;;
		(''|'n'|'N')
			exit 1
			;;
		(*)
			continue
			;;
		esac
	done
}

# Warn the programmer about unstaged changes and untracked files, but do
# not fail the commit, because those changes might be temporary or for
# a different branch.
awk_prog='substr($2, 2, 1) != "." { print $9; } $1 == "?" { print $2; }'
readonly awk_prog

unstaged="$( git status --porcelain=2 | awk "$awk_prog" )"
readonly unstaged

if [ "$unstaged" != "" ]
then
	printf 'WARNING: you have unstaged changes:\n\n%s\n\n' "$unstaged"
	prompt
fi

# Warn the programmer about temporary todos, but do not fail the commit,
# because the commit could be in a temporary branch.
temp_todos="$( git grep -e 'TODO.*!!' -- ':!scripts/hooks/pre-commit' || : )"
readonly temp_todos

if [ "$temp_todos" != "" ]
then
	printf 'WARNING: you have temporary todos:\n\n%s\n\n' "$temp_todos"
	prompt
fi

verbose="${VERBOSE:-0}"
readonly verbose

if [ "$( git diff --cached --name-only -- 'client/*.js' )" ]
then
	make VERBOSE="$verbose" js-lint js-test
fi

if [ "$( git diff --cached --name-only -- '*.go' '*.mod' '*.sh' 'Makefile' )" ]
then
	make VERBOSE="$verbose" go-os-check go-lint go-test
fi

if [ "$( git diff --cached --name-only -- '*.md' '*.txt' '*.yaml' '*.yml' )" ]
then
	make VERBOSE="$verbose" txt-lint
fi

if [ "$( git diff --cached --name-only -- './openapi/openapi.yaml' )" ]
then
	make VERBOSE="$verbose" openapi-lint
fi