#!/usr/bin/env bash
# Create (or replace) a Gitea release and upload assets, using the Gitea API.
#
# Required env:
#   GITEA_API    e.g., https://git.scient.ing/api/v1/repos/<owner>/<repo>
#   GITEA_TOKEN  a token with contents:write
#   TAG          the release tag
#   ASSETS       space-separated list of files to attach
# Optional env:
#   RELEASE_NAME      (default: $TAG)
#   BODY              (default: empty)
#   PRERELEASE        true|false (default: false)
#   REPLACE           true|false (default: false) delete an existing release+tag first
#   TARGET_COMMITISH  (default: empty; Gitea uses the default branch)
#   JQ                jq command (default: jq); set to e.g. "pixi exec --spec jq -- jq"
#   DRY_RUN           set to anything to print actions instead of calling the API

set -euo pipefail

: "${GITEA_API:?}"; : "${GITEA_TOKEN:?}"; : "${TAG:?}"; : "${ASSETS:?}"
: "${JQ:=jq}"
name="${RELEASE_NAME:-$TAG}"
body="${BODY:-}"
prerelease="${PRERELEASE:-false}"
replace="${REPLACE:-false}"
target="${TARGET_COMMITISH:-}"
auth="Authorization: token ${GITEA_TOKEN}"
dry="${DRY_RUN:-}"

say() { echo "[gitea-release] $*"; }

if [ "$replace" = "true" ]; then
  say "replacing any existing '$TAG' release and tag"
  if [ -n "$dry" ]; then
    say "DRY_RUN GET/DELETE ${GITEA_API}/releases/tags/${TAG} and DELETE tag ${TAG}"
  else
    existing=$(curl -fsSL -H "$auth" "${GITEA_API}/releases/tags/${TAG}" 2>/dev/null || true)
    if [ -n "$existing" ]; then
      id=$(printf '%s' "$existing" | $JQ -r '.id // empty')
      [ -n "$id" ] && curl -fsSL -X DELETE -H "$auth" "${GITEA_API}/releases/${id}"
    fi
    curl -fsSL -X DELETE -H "$auth" "${GITEA_API}/tags/${TAG}" 2>/dev/null || true
  fi
fi

payload=$($JQ -n \
  --arg tag "$TAG" --arg name "$name" --arg body "$body" \
  --argjson pre "$prerelease" --arg target "$target" \
  '{tag_name:$tag, name:$name, body:$body, draft:false, prerelease:$pre}
   + (if $target == "" then {} else {target_commitish:$target} end)')

say "creating release '$TAG' (prerelease=$prerelease)"
if [ -n "$dry" ]; then
  say "DRY_RUN POST ${GITEA_API}/releases"
  printf '%s\n' "$payload"
  rid="<release-id>"
else
  rid=$(curl -fsSL -X POST -H "$auth" -H "Content-Type: application/json" \
    "${GITEA_API}/releases" -d "$payload" | $JQ -r '.id')
fi

for f in $ASSETS; do
  n=$(basename "$f")
  say "uploading $n"
  if [ -n "$dry" ]; then
    say "DRY_RUN POST ${GITEA_API}/releases/${rid}/assets?name=${n}  (@${f})"
  else
    curl -fsSL -X POST -H "$auth" -F "attachment=@${f}" \
      "${GITEA_API}/releases/${rid}/assets?name=${n}"
  fi
done

say "done"