# ╭─────╮
# │ log │
# ╰─────╯

# ╭─────┬───────────╮
# │ log │ constants │
# ╰─────┴───────────╯

RWX_LOG_LEVEL_FATAL=0
RWX_LOG_LEVEL_ERROR=1
RWX_LOG_LEVEL_WARN=2
RWX_LOG_LEVEL_INFO=3
RWX_LOG_LEVEL_DEBUG=4
RWX_LOG_LEVEL_TRACE=5

# ╭─────┬───────────╮
# │ log │ variables │
# ╰─────┴───────────╯

rwx_log_level=${RWX_LOG_LEVEL_INFO}

# ╭─────┬─────╮
# │ log │ log │
# ╰─────┴─────╯

rwx_log_debug() {
	if [ "${rwx_log_level}" -ge "${RWX_LOG_LEVEL_DEBUG}" ]; then
		_rwx_log "DEBUG" "${@}"
	fi
}

rwx_log_error() {
	local code="${1}"
	shift
	[ -n "${code}" ] || rwx_log_fatal 1 "No error code"
	if [ "${rwx_log_level}" -ge "${RWX_LOG_LEVEL_ERROR}" ]; then
		_rwx_log "ERROR" "${@}" >&2
		return "${code}"
	fi
}

rwx_log_fatal() {
	local code="${1}"
	shift
	[ -n "${code}" ] || rwx_log_fatal 1 "No error code"
	if [ "${rwx_log_level}" -ge "${RWX_LOG_LEVEL_FATAL}" ]; then
		_rwx_log "FATAL" "${@}" >&2
		exit "${code}"
	fi
}

#= rwx_log
rwx_log_info() {
	if [ "${rwx_log_level}" -ge "${RWX_LOG_LEVEL_INFO}" ]; then
		_rwx_log "" "${@}"
	fi
}

rwx_log_trace() {
	if [ "${rwx_log_level}" -ge "${RWX_LOG_LEVEL_TRACE}" ]; then
		_rwx_log "TRACE" "${@}"
	fi
}

rwx_log_warn() {
	if [ "${rwx_log_level}" -ge "${RWX_LOG_LEVEL_WARN}" ]; then
		_rwx_log " WARN" "${@}"
	fi
}

_rwx_log() {
	local prefix="${1}"
	shift
	[ ${#} -gt 0 ] || set -- ""
	local line
	for line in "${@}"; do
		[ -n "${prefix}" ] &&
			printf "%s" "[${prefix}] "
		echo "${line}"
	done
}