#!/bin/bash
# Says which channels a nightly run makes, under which version, and where
# each one is published. It decides; the workflow fetches what it needs to
# know and passes it in, so every case can be tried without a runner.
#
#   nightly-plan <date> <run_number> <run_attempt> <event> <release_tag> [published_stable]
#
#   date              today, as YYYY.MM.DD
#   event             what started the run: schedule, workflow_dispatch
#   release_tag       omacom/omarchy's latest release, such as v4.0.4
#   published_stable  the version stable/latest.json names now, if any
#
# Prints a JSON list of {channel, version, release}; release is the path
# under the site.
#
# An edge version is the date and the run number. A stable version is the
# release's own, and on a scheduled run a release already published is left
# out: it is done once. Two builds are never the same bytes and a published
# file is never replaced, so no path is used twice: a stable image has the run
# number in its path, and a run started again adds its attempt to the number.
set -euo pipefail
[[ $# -eq 5 || $# -eq 6 ]] || { sed -n '2,12p' "$0" >&2; exit 2; }
date=$1 run=$2 attempt=$3 event=$4 tag=$5 published=${6:-}
fail() { echo "nightly-plan: $*" >&2; exit 1; }

[[ $date =~ ^[0-9]{4}\.[0-9]{2}\.[0-9]{2}$ ]] || fail "'$date' is not a date like 2026.10.09"
[[ $run =~ ^[1-9][0-9]*$ ]] || fail "'$run' is not a run number"
[[ $attempt =~ ^[1-9][0-9]*$ ]] || fail "'$attempt' is not a run attempt"
stable=${tag#v}
[[ $stable =~ ^[0-9]+(\.[0-9]+)+$ ]] || fail "the latest release is '$tag', not a version"

build=$run
[[ $attempt == 1 ]] || build+=.$attempt

channels=$(jq -cn --arg v "$date.$build" '[{channel: "edge", version: $v, release: "edge/\($v)"}]')
if [[ $event == schedule && $published == "$stable" ]]; then
  echo "nightly-plan: stable $stable is already published" >&2
else
  channels=$(jq -c --arg v "$stable" --arg build "$build" \
    '. + [{channel: "stable", version: $v, release: "stable/\($v)/\($build)"}]' <<<"$channels")
fi
echo "$channels"