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

root_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
artifact_dir="${ARTIFACT_DIR:-$root_dir/artifacts}"
GITEA_SERVER_URL="${GITEA_SERVER_URL:?GITEA_SERVER_URL is required}"
GITEA_REPOSITORY="${GITEA_REPOSITORY:?GITEA_REPOSITORY is required}"
GITEA_RELEASE_TAG="${GITEA_RELEASE_TAG:?GITEA_RELEASE_TAG is required}"
GITEA_TOKEN="${GITEA_TOKEN:?GITEA_TOKEN is required}"

[[ "$GITEA_REPOSITORY" =~ ^[A-Za-z0-9._-]+/[A-Za-z0-9._-]+$ ]] || {
  echo "Invalid GITEA_REPOSITORY: $GITEA_REPOSITORY" >&2
  exit 1
}

owner="${GITEA_REPOSITORY%%/*}"
repository="${GITEA_REPOSITORY#*/}"
api="${GITEA_SERVER_URL%/}/api/v1/repos/$owner/$repository"
metadata="$(mktemp)"
response="$(mktemp)"
existing_names="$(mktemp)"
trap 'rm -f "$metadata" "$response" "$existing_names"' EXIT

auth_header="Authorization: token $GITEA_TOKEN"
status="$(curl --silent --show-error --output "$metadata" --write-out '%{http_code}' \
  --header "$auth_header" "$api/releases/tags/$GITEA_RELEASE_TAG")"
[[ "$status" == 200 ]] || {
  echo "Unable to find release $GITEA_RELEASE_TAG (HTTP $status)" >&2
  cat "$metadata" >&2
  exit 1
}

release_id="$(python3 -c 'import json,sys; print(json.load(sys.stdin)["id"])' < "$metadata")"
python3 -c 'import json,sys; [print(a["name"]) for a in json.load(sys.stdin).get("assets", [])]' \
  < "$metadata" > "$existing_names"

shopt -s nullglob
assets=("$artifact_dir"/*.deb "$artifact_dir"/*.apk)
checksums=("$artifact_dir"/SHA256SUMS*)
assets+=("${checksums[@]}")
((${#assets[@]} > 0)) || {
  echo "No release assets found in $artifact_dir" >&2
  exit 1
}

for asset in "${assets[@]}"; do
  name="$(basename "$asset")"
  if grep -Fxq -- "$name" "$existing_names"; then
    echo "Release asset already exists; keeping it: $name"
    continue
  fi
  encoded_name="$(python3 -c 'import sys,urllib.parse; print(urllib.parse.quote(sys.argv[1], safe=""))' "$name")"
  echo "Uploading release asset: $name"
  status="$(curl --silent --show-error --output "$response" --write-out '%{http_code}' \
    --request POST --header "$auth_header" --form "attachment=@$asset" \
    "$api/releases/$release_id/assets?name=$encoded_name")"
  [[ "$status" == 201 ]] || {
    echo "Gitea returned HTTP $status while uploading $name" >&2
    cat "$response" >&2
    exit 1
  }
  : > "$response"
done