#!/bin/bash
# dependency: axel, wget, fzf.

blender_downloads_dir="${HOME}/blender"
nc=6 # number of connections

blender-dl-alpha(){
    # download
    ls -l "$blender_downloads_dir/alpha/" > /dev/null 2>&1 || mkdir -p "$blender_downloads_dir/alpha/"
    rm -r "$blender_downloads_dir/alpha/"* > /dev/null 2>&1
    cd "$blender_downloads_dir/alpha/"
    var=$(wget -qO- https://builder.blender.org/download/daily/ | grep -o -G 'blender-[^a-z]*-alpha+main.[0-9a-z]*-linux.x86_64-release.tar.xz' | awk 'NR==1')
    axel -n $nc https://builder.blender.org/download/daily/$var
    # sha256sum check
    axel -n $nc https://builder.blender.org/download/daily/$var.sha256
    echo $(cat $var.sha256) $var > $var.sha256
    sha256sum -c $var.sha256 || echo "sha256sum corrupt!" > log_sha
    # blender extract
    tar -xf "$blender_downloads_dir/alpha/"*.tar.xz -C "$blender_downloads_dir/alpha/"
    # icon
    bl_path="$(find "$blender_downloads_dir/alpha/"* -maxdepth 1 -name 'blender' | head -1)"
    echo $bl_path
    sed -i '/Exec/d' "$bl_path.desktop"
    sed -i '/Icon/d' "$bl_path.desktop"
    sed -i '/Name/d' "$bl_path.desktop"
    echo "Exec=$bl_path" %f >> $bl_path.desktop
    echo "Icon=$bl_path.svg" >> $bl_path.desktop
    echo "Name=blender-dl-alpha" >> $bl_path.desktop
    ls -l ~/.local/share/applications > /dev/null 2>&1 || mkdir -p ~/.local/share/applications
    cp "$bl_path.desktop" ~/.local/share/applications/blender-dl-alpha.desktop
}

blender-dl(){
    # download
    ls -l "$blender_downloads_dir/blender/" > /dev/null 2>&1 || mkdir -p "$blender_downloads_dir/blender/"
    rm -r "$blender_downloads_dir/blender/"* > /dev/null 2>&1
    cd "$blender_downloads_dir/blender/"
    ver=$(wget -qO- https://ftp.halifax.rwth-aachen.de/blender/release/ |  grep -o -G 'Blender[0-9].[0-9]' | tail -1)
    ver2=$(wget -qO- https://ftp.halifax.rwth-aachen.de/blender/release/$ver |  grep -o -G 'blender-[0-9].[0-9].[0-9]-linux-x64.tar.xz' | tail -1)
    axel -n $nc https://ftp.halifax.rwth-aachen.de/blender/release/$ver/$ver2
    # blender extract
    tar -xf "$blender_downloads_dir/blender/"*.tar.xz -C "$blender_downloads_dir/blender"
    # icon
    bl_path="$(find "$blender_downloads_dir/blender/"* -maxdepth 1 -name 'blender' | head -1)"
    echo $bl_path
    sed -i '/Exec/d' "$bl_path.desktop"
    sed -i '/Icon/d' "$bl_path.desktop"
    sed -i '/Name/d' "$bl_path.desktop"
    echo "Exec=$bl_path" %f >> $bl_path.desktop
    echo "Icon=$bl_path.svg" >> $bl_path.desktop
    echo "Name=blender-dl" >> $bl_path.desktop
    ls -l ~/.local/share/applications > /dev/null 2>&1 || mkdir -p ~/.local/share/applications
    cp "$bl_path.desktop" ~/.local/share/applications/blender-dl.desktop
}

run="$(echo -e "blender-dl-alpha\nblender-dl" | fzf )"
$run