// 清理舊版本成品的功能模組。
// 對應原本 entrypoint.sh 的「取得成品資訊」與「刪除舊版本成品」區段。

import { section, info, success, fail, warn } from './logger.js'
import { isEmptyOrNull } from './validate.js'

/**
 * 依建立時間由新到舊排序,保留最新的 keepCount 筆,回傳其餘待刪除的成品。
 * 純函式,方便單元測試。
 * @param {any[]} releases 成品清單
 * @param {number} keepCount 要保留的筆數
 * @returns {any[]} 需要刪除的成品(較舊者)
 */
export function selectReleasesToDelete(releases, keepCount) {
  const sorted = [...releases].sort(
    (a, b) => new Date(b.created_at) - new Date(a.created_at),
  )
  return sorted.slice(keepCount)
}

/**
 * 讀取成品清單,刪除超出保留數量的舊版本成品。
 * @param {import('./gitea-client.js').GiteaClient} client
 * @param {ReturnType<import('./config.js').loadConfig>} config
 */
export async function cleanupReleases(client, config) {
  section('取得成品資訊')
  info(`GET ${config.releaseApiUrl}`)

  const releases = await client.fetchAllPages(config.releaseApiUrl)
  info(`RELEASE_COUNT=${releases.length}`)
  info(`KEEP_COUNT=${config.keepCount}`)

  if (releases.length <= config.keepCount) {
    success('沒有需要清理的舊版本成品')
    return
  }

  section('刪除舊版本成品')
  const toDelete = selectReleasesToDelete(releases, config.keepCount)

  for (const release of toDelete) {
    const { id, tag_name: tag, name } = release

    if (isEmptyOrNull(id)) {
      warn(`略過沒有 id 的成品: ${tag} (${name})`)
      continue
    }

    const url = `${config.releaseApiUrl}/${id}`
    info(`DELETE ${tag} (${name})`)

    const code = await client.deleteResource(url)
    if (code === 204) {
      success(`成功刪除: ${tag} (${name})`)
    } else {
      fail(`刪除失敗: ${tag} (${name}), HTTP ${code}`)
    }
  }
}