#!/bin/sh
set -u

. aux/utils.sh
. tests/lib.sh

export XDG_DATA_HOME="$PWD/tests/test-profiles"

assert_usage() {
	if ! grep -Fq 'Usage' "$1"; then
		echo 'Expected to find "Usage" text, it was missing:' >&2
		cat "$ERR" >&2
		exit 1
	fi
}

test_unsupported_long_flags() {
	testing 'unsupported long flags'
	OUT="$(mktemp)"
	ERR="$(mktemp)"
	./remembering --unknown-long-flag 1>"$OUT" 2>"$ERR"
	STATUS=$?
	assert_status 2
	assert_usage "$ERR"
	test_ok
}

test_missing_required_flags() {
	testing 'missing required flags'
	OUT="$(mktemp)"
	ERR="$(mktemp)"
	./remembering -a something -b else 1>"$OUT" 2>"$ERR"
	STATUS=$?
	assert_status 2
	assert_usage "$ERR"
	test_ok
}

test_single_required_flag() {
	testing 'single required flag'
	OUT="$(mktemp)"
	ERR="$(mktemp)"
	./remembering -p valid-test-profile 1>"$OUT" 2>"$ERR"
	STATUS=$?
	assert_status 2
	assert_usage "$ERR"

	OUT="$(mktemp)"
	ERR="$(mktemp)"
	./remembering -c 'head -n' 1>"$OUT" 2>"$ERR"
	STATUS=$?
	assert_status 2
	assert_usage "$ERR"
	test_ok
}

test_flags_without_required_argument() {
	testing 'flags without required argument'
	OUT="$(mktemp)"
	ERR="$(mktemp)"
	./remembering -pc 1>"$OUT" 2>"$ERR"
	STATUS=$?
	assert_status 2
	assert_usage "$ERR"

	OUT="$(mktemp)"
	ERR="$(mktemp)"
	./remembering -cp 1>"$OUT" 2>"$ERR"
	STATUS=$?
	assert_status 2
	assert_usage "$ERR"

	OUT="$(mktemp)"
	ERR="$(mktemp)"
	./remembering -p -c 1>"$OUT" 2>"$ERR"
	STATUS=$?
	assert_status 2
	assert_usage "$ERR"
	test_ok
}

test_valid_options() {
	testing 'valid options'
	OUT="$(mktemp)"
	ERR="$(mktemp)"
	printf 'a\nb\nc\n' | \
		./remembering \
			-p "always-unique-$(uuid)" \
			-c 'head -n1' \
			1>"$OUT" 2>"$ERR"
	STATUS=$?
	assert_status 0
	assert_empty_stderr
	assert_stdout 'a'
	test_ok
}

test_help_flags() {
	testing 'help flags'

	OUT="$(mktemp)"
	ERR="$(mktemp)"
	./remembering -h 1>"$OUT" 2>"$ERR"
	STATUS=$?
	assert_status 0
	assert_empty_stderr
	assert_usage "$OUT"

	OUT="$(mktemp)"
	ERR="$(mktemp)"
	./remembering --help 1>"$OUT" 2>"$ERR"
	STATUS=$?
	assert_status 0
	assert_empty_stderr
	assert_usage "$OUT"

	test_ok
}

test_version_flags() {
	testing 'version flags'
	REGEX='^remembering-[0-9\.]+ [0-9-]+'

	OUT="$(mktemp)"
	ERR="$(mktemp)"
	./remembering -V 1>"$OUT" 2>"$ERR"
	STATUS=$?
	assert_status 0
	assert_empty_stderr
	assert_grep_stream "\$OUT" "$OUT" "$REGEX"

	OUT="$(mktemp)"
	ERR="$(mktemp)"
	./remembering --version 1>"$OUT" 2>"$ERR"
	STATUS=$?
	assert_status 0
	assert_empty_stderr
	assert_grep_stream "\$OUT" "$OUT" "$REGEX"

	test_ok
}

test_environment_variables_and_precedence() {
	testing 'environment variables and precedence'

	OUT="$(mktemp)"
	ERR="$(mktemp)"
	PROFILE='environment-variables-xdg'
	XDG="$PWD/tests/test-profiles/xdg-test-$(uuid)"
	printf 'a\n' | \
		XDG_DATA_HOME="$XDG" ./remembering \
			-p "$PROFILE" \
			-c 'head -n1' \
			1>"$OUT" 2>"$ERR"
	STATUS=$?
	assert_status 0
	assert_empty_stderr
	assert_stdout 'a'
	assert_stream "\$XDG PROFILE" "$XDG/$PROFILE" '1:a'

	OUT="$(mktemp)"
	ERR="$(mktemp)"
	PROFILE='environment-variables-home'
	HHOME="$PWD/tests/test-profiles/home-test-$(uuid)"
	printf 'b\n' | \
		HOME="$HHOME" XDG_DATA_HOME='' ./remembering \
			-p "$PROFILE" \
			-c 'head -n1' \
			1>"$OUT" 2>"$ERR"
	STATUS=$?
	assert_status 0
	assert_empty_stderr
	assert_stdout 'b'
	assert_stream "\$HHOME PROFILE" "$HHOME/.local/share/remembering/$PROFILE" '1:b'

	OUT="$(mktemp)"
	ERR="$(mktemp)"
	PROFILE='xdg-supersedes-home'
	HHOME="$PWD/tests/test-profiles/home-wins-over-xdg-test-$(uuid)"
	XDG="$PWD/tests/test-profiles/xdg-wins-over-home-test-$(uuid)"
	printf 'c\n' | \
		HOME="$HHOME" XDG_DATA_HOME="$XDG" ./remembering \
			-p "$PROFILE" \
			-c 'head -n1' \
			1>"$OUT" 2>"$ERR"
	STATUS=$?
	assert_status 0
	assert_empty_stderr
	assert_stdout 'c'
	assert_stream "\$XDG and \$HOME PROFILE" "$XDG/$PROFILE" '1:c'

	if [ -e "$HHOME/.local/share/remembering/$PROFILE" ]; then
		printf "\nERR: The file in \$HHOME/.local should't exist\n" >&2
		exit 1
	fi

	test_ok
}

test_unsupported_long_flags
test_missing_required_flags
test_missing_required_flags
test_single_required_flag
test_flags_without_required_argument
test_valid_options
test_help_flags
test_version_flags
test_environment_variables_and_precedence