#!/bin/sh

OUTPUT_NAME="tc-video"

_printhelp()
{
    cat <<EOF
Usage: ${1##*/} [FILES]

Create a '$OUTPUT_NAME' script in current folder. The script provides a FFmpeg call
to transcode FILES with some useful options and instructive help.

FILES realpath will be included into the script.

This script is meant to be easily editable to fit the user needs.

EOF
}

if [ $# -eq 0 ] || [ "$1" = "-h" ]; then
    _printhelp "$0"
    exit
fi

if ! command -v realpath >/dev/null; then
    echo "realpath required."
    exit
fi

SCRIPT_PATH="${0%/*}"
SCRIPT_NAME="${0##*/}"
FILELIST=""
if [ -f "$SCRIPT_PATH/.$SCRIPT_NAME.in" ]; then
    cp -i "$SCRIPT_PATH/.$SCRIPT_NAME.in" "$OUTPUT_NAME"
    for i ; do
        REAL="$(realpath "$i")"
        FILELIST="${FILELIST:+$FILELIST -i }'$REAL'"
        sed -i "s|^FILELINES|$REAL\nFILELINES|" "$OUTPUT_NAME"
    done
    sed -i 's|###FILELIST|'"$FILELIST"'|' "$OUTPUT_NAME"
    chmod +x "$OUTPUT_NAME"
else
    echo ".$SCRIPT_NAME.in not found!"
fi