#!/usr/bin/env bash

if which tput >/dev/null 2>&1; then
    ncolors=$(tput colors)
fi
if [ -t 1 ] && [ -n "$ncolors" ] && [ "$ncolors" -ge 8 ]; then
    RED="$(tput setaf 1)"
    GREEN="$(tput setaf 2)"
    YELLOW="$(tput setaf 3)"
    BLUE="$(tput setaf 4)"
    MAGENTA="$(tput setaf 5)"
    CYAN="$(tput setaf 6)"
    BOLD="$(tput bold)"
    NORMAL="$(tput sgr0)"
else
    RED=""
    GREEN=""
    YELLOW=""
    BLUE=""
    MAGENTA=""
    CYAN=""
    BOLD=""
    NORMAL=""
fi

filename=$(basename -- "$1")
output_name="$2"

if [[ $filename == "" || $output_name == "" ]]; then
    printf "${BOLD}${RED}Usage: create a text file that lists the input video paths on separate lines using the format: file '/path/to/video'. Then call:\n\n$0 <list name> <output name>${NORMAL}\n"
    exit 1
fi

output="${output_name}.mp4"

printf "\n${YELLOW}${BOLD}Joining contents of '$filename'| output: $output${NORMAL}\n"

ffmpeg -f concat -safe 0 -i "$filename" -c copy "$output"

printf "\n${GREEN}${BOLD}Finished joining${NORMAL}\n\n"