#!/usr/bin/env zsh
# prepare photos for sharing them online

setopt LOCAL_OPTIONS ERR_RETURN NO_UNSET PIPE_FAIL

zmodload zsh/zutil
local -a o_quality=(-q 90)
local -a o_size=(-s 1500x1500)
local -a o_format=(-s webp)
local -a o_help=()
zparseopts -D -K -- q:=o_quality s:=o_size f:=o_format h=o_help
if [[ ${#o_help} -ne 0 || ! -v 1 ]]; then
    local ret=$(( ${#o_help} ^ 1 ))
    print -u $(( 1 + ${ret} )) "usage: ${0} [-h]" \
        "[-q QUALITY (=${o_quality[2]})]" \
        "[-s SIZE (=${o_size[2]})]" \
        "[-f FORMAT (=${o_format[2]})]" \
        "<FILE> …"
    return ${ret}
fi
local quality=${o_quality[2]}
local size=${o_size[2]}
local format=${o_format[2]}

mkdir -p photoprep
for file in ${@}; do
    newfile=photoprep/${file##*/}
    newfile=${newfile%.*}.${format}
    magick -quality ${quality} ${file} -auto-orient -strip -resize ${size} ${newfile}
    print -n '.'
done
print