#!/bin/bash
set -euo pipefail

log() {
  printf '%s\n' "$*" >&2
}

fail() {
  log "ERROR: $*"
  exit 1
}

resolve_token() {
  local source_name env_value
  local sources=(
    "inputs.RUNNER_TOKEN:INPUT_RUNNER_TOKEN"
    "secrets.GITEA_TOKEN:GITEA_TOKEN"
    "secrets.RUNNER_TOKEN:RUNNER_TOKEN_SECRET"
  )

  for source in "${sources[@]}"; do
    source_name="${source%%:*}"
    env_value="${source#*:}"
    log "Trying token from ${source_name}"
    if [[ -n "${!env_value:-}" ]]; then
      log "Using token from ${source_name}"
      printf '%s' "${!env_value}"
      return 0
    fi
    log "Token not found in ${source_name}, trying next source"
  done

  return 1
}

resolve_keep_versions() {
  local raw_value="${INPUT_KEEP_VERSIONS:-2}"

  if [[ -z "${raw_value}" ]]; then
    raw_value="2"
  fi

  if [[ ! "${raw_value}" =~ ^[0-9]+$ ]]; then
    fail "Invalid keep_versions: ${raw_value}"
  fi

  printf '%s' "${raw_value}"
}

main() {
  local token keep_versions

  log "Gitea Server Url: ${GITEA_SERVER_URL:-}"
  log "Gitea Repository: ${GITEA_REPOSITORY:-}"

  if ! token="$(resolve_token)"; then
    fail "No Gitea token available, exiting"
  fi

  export RESOLVED_GITEA_TOKEN="$token"
  keep_versions="$(resolve_keep_versions)"
  log "keep_versions=${keep_versions}"
  log "Token source resolved successfully"
  log "Stage 2 complete"
}

main "$@"