#!/bin/sh

_echo() {
    printf %s\\n "$*"
}

fatal() {
    _echo "$*" >&2
    exit 1
}

main() {
    if [ -z "${DVTM_CMD_FIFO}" ]; then
        fatal "No DVTM_CMD_FIFO variable detected in the environment"
    fi

    readonly PATH_DIR_TMP=$(mktemp -d)
    readonly PATH_FIFO_IN="${PATH_DIR_TMP}/in"
    readonly PATH_FIFO_OUT="${PATH_DIR_TMP}/out"
    readonly PATH_FIFO_RET="${PATH_DIR_TMP}/ret"

    if [ -z "${PATH_DIR_TMP}" ]; then
        fatal "Unable to create a temporary directory"
    fi

    args=""
    for i in "$@"; do
        if [ -z "${args}" ]; then
            args="\\'${i}\\'"
        else
            args="${args} \\'${i}\\'"
        fi
    done

    mkfifo "${PATH_FIFO_IN}" "${PATH_FIFO_OUT}"

    _echo \
        "create 'fzy ${args} < \\'${PATH_FIFO_IN}\\' > \\'${PATH_FIFO_OUT}\\' 2>&1; echo $? > \\'${PATH_FIFO_RET}\\''" \
        > "${DVTM_CMD_FIFO}"
    cat <&0 > "${PATH_FIFO_IN}" &
    cat < "${PATH_FIFO_OUT}"

    readonly CODE_RET=$(head -n 1 "${PATH_FIFO_RET}")

    rm -rf "${PATH_DIR_TMP}"

    exit "${CODE_RET}"
}

main "$@"