#!/bin/bash

if ! type_output="$(type dirname readlink curl wget jq grep head tail date 2>&1)"; then
    printf 'dirkjan-bot: Some required commands are missing, lookup results:\n%s\n' \
           "$type_output" >&2
    exit 1
fi

dirkjan_url='https://dirkjan.nl'
instance_url='https://botsin.space'
here="$(here="$(readlink -f "${BASH_SOURCE[0]}")" && dirname "$here")" || exit $?

get-dirkjan-img-url() {
    local url="$1"

    curl "$url/" | grep img | grep -Po '(?<=src=")[^"]+"' | head -n 2 | tail -n 1
}

download-dirkjan-img() (
    set -e

    dirkjan_url="$1"
    here="$2"

    strip_url="$(get-dirkjan-img-url "$dirkjan_url")"

    date="$(date +'%H-%M-%S %d-%m-%Y')"

    data_dir="$here/data"
    [[ -d "$data_dir" ]] || mkdir -p "$data_dir"

    outfile="$data_dir/dirkjan $date.png"

    wget "$strip_url" -O "$outfile" >&2

    printf '%s' "$outfile"
)

api-curl() {
    local token="$1"

    shift || return $?

    curl -H 'Authorization: bearer '"$bot_token" "$@"
}

img_file="$(download-dirkjan-img "$dirkjan_url" "$here")"

if [[ -z "$DIRKJAN_BOT_TOKEN" ]]; then
    bot_token="$(cat "$here/bot-token")" || exit $?
else
    bot_token="$DIRKJAN_BOT_TOKEN"
fi

upload_result="$(api-curl "$bot_token" -F file=@"$img_file" "$instance_url/api/v1/media")" || exit $?

media_id="$(jq -r .id <<<"$upload_result")" || exit $?

echo heey
post_text="$(LC_ALL=nl_NL.UTF-8 date +'%A %d %B %Y')" || exit $?
echo ha

format_string='{
"status": "#dirkjan %s\\n\\nStrip door Mark Retera - https://dirkjan.nl\\n\\n#dagelijks #nederlandstalig #strip #daily #dutch #comic",
"media_ids": [ "%s" ],
"visibility": "public"
}'

printf -v json "$format_string" "$post_text" "$media_id"

api-curl "$bot_token" -d "$json" -H 'Content-Type: application/json' "$instance_url/api/v1/statuses"