#!/bin/sh

testfilespath="$1"

# determine sequences for formatted output
red=$(tput setaf 1)
green=$(tput setaf 2)
yellow=$(tput setaf 3)
blue=$(tput setaf 4)
bold=$(tput bold)
normal=$(tput sgr0)

inform() {
    echo "${bold}==> ${blue}INFO:${normal} ${bold}${1}${normal}"
}

success() {
    echo "${bold}==> ${green}SUCCESS:${normal} ${bold}${1}${normal}"
}

fail() {
    echo "${bold}==> ${red}FAILURE:${normal} ${bold}${1}${normal}"
}

skipping() {
    echo 'archive/files already exist -> skipping download'
}

download() {
    title="$1" url="$2" filename="$3" destdir="$4"

    inform "Downloading \"$title\" ..."
    if [[ ! -d $destdir ]]; then
        # actual download
        pushd '/tmp'
        if [[ ! -f $filename ]]; then
            wget --output-document="$filename" "$url"
            if [[ $? != 0 ]]; then
                fail "unable to download: \"$url\""
                return
            fi
        else
            skipping
        fi
        popd
        
        # extraction
        mkdir "$destdir"
        pushd "$destdir"
        case "$filename" in
            *.zip)    unzip "/tmp/$filename";;
            *)      fail "unable to extract archive: format \"${filename#*.}\" not supported"
                    return;;
        esac
        if [[ $? != 0 ]]; then
            fail "unable to extract \"/tmp/$filename\""
            return
        fi
        popd
    else
        skipping
    fi 
}

# enter testfiles directory
if [[ -d $testfilespath ]]; then
    cd "$testfilespath"
else
    fail "specified testfiles directory does not exist"
    exit -1
fi

download \
    'Matroska Test Suite - Wave 1' \
    'http://downloads.sourceforge.net/project/matroska/test_files/matroska_test_w1_1.zip?r=&ts=1454982254&use_mirror=netix' \
    'matroska_test_w1_1.zip' \
    'matroska_wave1'