#!/usr/bin/env bash

set -eo pipefail

NOSTR_RELAYER=${NOSTR_RELAYER:-nostcat}
FUZZER=${FUZZER:-fzf}

if ! command -v $NOSTR_RELAYER >&2 >/dev/null; then
	printf "error: nostr relayer '%s' not found, set \$NOSTR_RELAYER or install '%s'\n" $NOSTR_RELAYER $NOSTR_RELAYER
	exit 1
fi

if ! command -v $FUZZER >&2 >/dev/null; then
	printf "error: fuzzer '%s' not found, set \$FUZZER or install '%s'\n" $FUZZER $FUZZER
	exit 1
fi

if ! command -v jq >&2 >/dev/null; then
	printf "error: jq is required. please install. \n"
	exit 1
fi

if ! command -v fzf >&2 >/dev/null; then
	printf "error: fzf is required. please install. \n"
	exit 1
fi

usage() {
	printf "usage: git-show-nostr <-t tag OR id> [OPTIONS...]\n"
	printf "\n"
	printf "   -O         output patches to a local file.\n"
	printf "   -o name    output patches to a local file with a specific filename.\n"
	printf "   -l limit   Max number of results to return. defaults to 20.\n"
	printf "   -t tag     Query a nostr tag.\n"
	printf "   -r relay   nostr relay to query. Uses 'git config nostr.relays' option by default\n"
	exit 0
}

if [ "$1" == "--help" ]; then
	usage
	exit 1
fi

limit=20
while getopts "Oo:t:r:l:" o; do
case "$o" in
	O)
		writeout=1
		;;
	o)
		writeout=1
		fname=$OPTARG
		;;
	r)
		relay=$OPTARG
		;;
	t)
		tag=$OPTARG
		;;
	l)
		limit=$OPTARG
		;;
	*)
		usage
		;;
esac
done
shift $((OPTIND-1))

if [ -z $relay ]; then
	relay="$(git config nostr.relays)"
fi

if [ -z $relay ]; then
	usage
	exit 0
fi

target=$tag
query=""
if [ -z $tag ]; then
	target=$id
	query=$(printf '"ids":["%s"],' $id)
else
	query=$(printf '"#t":["%s"],' $tag)
fi

fullquery=$(printf '["REQ","git-show-nostr",{"kinds":[19691228],%s"limit": %d}]\n' "$query" $limit)

if [ -z $fname ]; then
	target=${target:-all}
	outname="nostr-patches-$target.json"
else
	outname=$fname
fi

if [ -z $writeout ]; then
	outname=$(mktemp)
fi

echo "$fullquery" | $NOSTR_RELAYER $relay | jq -c '.[2]' > "$outname"

if [ ! -z $writeout ]; then
	printf "saved results to %s\n" "$outname" >&2
fi

pager="$(git config core.pager)"
if [ ! -t 1 ]; then
	pager=cat
fi

ev_count=$(wc -l < "$outname")
if [ $ev_count = 1 ]; then
	jq -r .content "$outname" | $pager
	exit 1
fi

dateformatter=""
if ! command -v datefmt >&2 >/dev/null; then
	printf "install https://jb55.com/datefmt if you want nice relative timestamp formatting\n" >&2
	dateformatter=cat
else
	dateformatter="datefmt --relative"
fi

evid=$(jq -r '
def tag(name): .tags[] | select(.[0] == name) | .[1];

. | [(.created_at | tostring), (.|tag("t")), (.|tag("subject")), (.|tag("author")), .pubkey[0:20], "id:\(.id)"] | @tsv' "$outname" |
sort -rn |
$dateformatter |
column -t -s $'\t' |
$FUZZER |
sed -E -n 's,.*id:(.*)$,\1,p'
)

jq -r 'select(.id == "'$evid'") | .content' "$outname" | $pager

if [ -z $writeout ]; then
	rm -f "$outname"
fi