#! /bin/zsh
#
# this file:
#   http://user.it.uu.se/~embe8573/conf/.zsh/mpv
#   https://dataswamp.org/~incal/conf/.zsh/mpv
#
# mpv conf:
#   https://dataswamp.org/~incal/conf/mpv/mpv.conf
#
# mpv keys:
#   https://dataswamp.org/~incal/conf/mpv/input.conf
#
# send keys:
#  https://dataswamp.org/~incal/scripts/mpv-fetch-key

play-two-random () {
    local -a vids
    vids=("${(@f)$(ls *.(flv|mkv|mp4|webm))}")

    local num_vids=${#vids}

    local v1i
    local v2i
    until [[ $v1i != $v2i ]]; do
        v1i=$(( $RANDOM % $num_vids + 1 ))
        v2i=$(( $RANDOM % $num_vids + 1 ))
    done

    local v1=$vids[$v1i]
    local v2=$vids[$v2i]

    play-two-width $v1 $v2
    echo $v1
    echo $v2
}

play-two-width () {
    local one=$1
    local two=$2

    local v2w=$(video-width $two)

    mpv                       \
        $one                  \
        --external-file=$two  \
        --loop                \
        --no-resume-playback  \
        --lavfi-complex="[vid1] scale=${v2w}:-1 [vid1s]; [vid1s] [vid2] vstack [vo]"
}
alias play-two=play-two-width
alias play-two-w=play-two-width

play-two-height () {
    local one=$1
    local two=$2

    local v2w=$(video-width $two)

    mpv                       \
        $one                  \
        --external-file=$two  \
        --loop                \
        --no-resume-playback  \
        --lavfi-complex="[vid1] scale=${v2w}:-1 [vid1s]; [vid1s] [vid2] hstack [vo]"
}
alias play-two-h=play-two-height

play-slow-and-silent () {
    local -a fs
    fs=($@)

    local -a opts
    opts=(
        --ao=null
        --no-resume-playback
        --shuffle
        --speed=0.78
         )

    [[ $fs ]] && mpv $opts $fs || mpv $opts **/*.(flv|mkv|mp4|webm)
}
alias pls=play-slow-and-silent

play-sound () {
    mpv --vo=null $@
}

pl () {
    local -a fs
    fs=($@)

    if (( ${+DISPLAY} )); then # [1]
        mpv $fs
    else
        play-sound $fs
    fi
}

play-local () {
    local -a opts
    opts=($@)
    mpv \
        --no-resume-playback  \
        --shuffle             \
        --volume=30           \
        $opts                 *.(flv|mkv|mp4|webm)
}
alias pll=play-local

play-local-recursively () {
    local -a opts
    opts=($@)
    mpv \
        --no-resume-playback  \
        --shuffle             \
        --volume=30           \
        $opts                 **/*.(flv|mkv|mp4|webm)
}
alias pllr=play-local-recursively

# [1] zsh <  5.3: (( ${+DISPLAY} ))
#     zsh >= 5.3: [[ -v VAR ]]
#          POSIX: [ -n "${VAR+1}" ]
#     <https://stackoverflow.com/a/42655305>
#
#     $ zsh --version
#     Debian 10/buster: 5.7
#          OpenBSD 6.7: 5.8
#          OpenBSD 6.6: 5.7
#           SunOS 5.10: 4.3