#!/usr/bin/env bash
set -Eeuo pipefail

: "${GITEA_API_URL:?GITEA_API_URL is required}"
: "${GITEA_REPOSITORY:?GITEA_REPOSITORY is required}"
: "${GITEA_TOKEN:?GITEA_TOKEN is required}"
: "${RELEASE_TAG:?RELEASE_TAG is required}"
: "${RELEASE_NOTES:?RELEASE_NOTES is required}"

if [[ ! "$RELEASE_TAG" =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
  printf 'captioneer: release tag must match vMAJOR.MINOR.BUG, got %q\n' "$RELEASE_TAG" >&2
  exit 1
fi
if (( $# == 0 )); then
  printf 'captioneer: at least one release asset is required\n' >&2
  exit 1
fi

for asset in "$@"; do
  [[ -f "$asset" ]] || { printf 'captioneer: release asset not found: %s\n' "$asset" >&2; exit 1; }
done

api_base="${GITEA_API_URL%/}/repos/$GITEA_REPOSITORY"
authorization="Authorization: token $GITEA_TOKEN"
release_response="$(mktemp)"
trap 'rm -f -- "$release_response"' EXIT

status="$(curl --silent --show-error --output "$release_response" --write-out '%{http_code}' \
  --header "$authorization" \
  "$api_base/releases/tags/$RELEASE_TAG")"

release_payload="$(jq -n \
  --arg tag "$RELEASE_TAG" \
  --arg name "Captioneer $RELEASE_TAG" \
  --rawfile body "$RELEASE_NOTES" \
  '{tag_name: $tag, name: $name, body: $body, draft: false, prerelease: false}')"

case "$status" in
  200)
    release_id="$(jq -er '.id' "$release_response")"
    curl --fail-with-body --silent --show-error \
      --request PATCH \
      --header "$authorization" \
      --header 'Content-Type: application/json' \
      --data "$release_payload" \
      "$api_base/releases/$release_id" > "$release_response"
    ;;
  404)
    curl --fail-with-body --silent --show-error \
      --request POST \
      --header "$authorization" \
      --header 'Content-Type: application/json' \
      --data "$release_payload" \
      "$api_base/releases" > "$release_response"
    release_id="$(jq -er '.id' "$release_response")"
    ;;
  *)
    printf 'captioneer: Gitea release lookup failed with HTTP %s\n' "$status" >&2
    cat "$release_response" >&2
    exit 1
    ;;
esac

for asset in "$@"; do
  asset_name="$(basename -- "$asset")"
  while IFS= read -r attachment_id; do
    [[ -n "$attachment_id" ]] || continue
    curl --fail-with-body --silent --show-error \
      --request DELETE \
      --header "$authorization" \
      "$api_base/releases/$release_id/assets/$attachment_id" >/dev/null
  done < <(jq -r --arg name "$asset_name" '.assets[]? | select(.name == $name) | .id' "$release_response")

  curl --fail-with-body --silent --show-error \
    --request POST \
    --header "$authorization" \
    --form "attachment=@$asset" \
    "$api_base/releases/$release_id/assets?name=$asset_name" >/dev/null
  printf 'Uploaded %s\n' "$asset_name"
done