#!/usr/bin/env bash

http_get() {
  local url="$1"
  curl -fsSL -H "User-Agent: AstraDeploy/${DEPLOY_VERSION}" "$url"
}

get_papermc_download_url() {
  local project="$1"
  local version="$2"

  if [[ "$version" == "latest" ]]; then
    version="$(http_get "https://fill.papermc.io/v3/projects/${project}" | jq -r '.versions | if type=="array" then .[-1] else (to_entries | last | .value[0]) end')"
  fi

  local builds_json
  builds_json="$(http_get "https://fill.papermc.io/v3/projects/${project}/versions/${version}/builds")"
  local url
  url="$(printf '%s\n' "$builds_json" | jq -r '.builds | map(select(.channel=="STABLE")) | .[0].downloads."server:default".url // empty')"
  if [[ -z "$url" || "$url" == "null" ]]; then
    fail "$(t no_stable_build "$project" "$version")"
  fi
  echo "$url"
}

get_purpur_download_url() {
  local version="$1"
  local build="${2:-latest}"

  if [[ "$version" == "latest" ]]; then
    version="$(http_get "https://api.purpurmc.org/v2/purpur/" | jq -r '.versions | .[-1]')"
  fi

  if [[ "$build" == "latest" ]]; then
    echo "https://api.purpurmc.org/v2/purpur/${version}/latest/download"
  else
    echo "https://api.purpurmc.org/v2/purpur/${version}/${build}/download"
  fi
}

get_github_release_asset_url() {
  local repo="$1"
  local pattern="$2"
  http_get "https://api.github.com/repos/${repo}/releases/latest" \
    | jq -r --arg pattern "$pattern" '.assets[] | select(.name | test($pattern)) | .browser_download_url' | head -n 1
}

download_as_user() {
  local url="$1"
  local target="$2"

  emit_step "download_start" "$url"
  run_cmd sudo -u "$SERVER_USER" bash -lc "curl -fL \"$url\" -o \"${target}\""
  emit_step "download_completed" "$target"
}

download_as_user_atomic() {
  local url="$1"
  local target="$2"
  local tmp="${target}.tmp.${RANDOM}.$(date +%s)"

  download_as_user "$url" "$tmp"
  run_cmd mv "$tmp" "$target"
  emit_step "download_swap" "$target"
}