// Changelog desde la API de Gitea (commits del repo).
const GITEA = process.env.GITEA_URL || 'https://git.nightspire.gg'
const REPO = process.env.GITEA_REPO || 'Inna/NightSpire'

export interface Commit {
  sha: string
  shortSha: string
  title: string
  body: string
  author: string
  date: string
  url: string
}

interface GiteaCommit {
  sha: string
  html_url: string
  created?: string
  commit?: { message?: string; author?: { name?: string; date?: string } }
  author?: { login?: string } | null
}

export async function getCommits(page = 1, limit = 10): Promise<{ commits: Commit[]; totalPages: number }> {
  try {
    const res = await fetch(`${GITEA}/api/v1/repos/${REPO}/commits?page=${page}&limit=${limit}`, {
      headers: { Accept: 'application/json' },
      // Cache corto para no golpear Gitea en cada visita.
      next: { revalidate: 300 },
    })
    if (!res.ok) return { commits: [], totalPages: 1 }
    const totalPages = Math.max(1, Number(res.headers.get('x-pagecount') || '1'))
    const data = (await res.json()) as GiteaCommit[]
    const commits = data.map((c) => {
      const msg = c.commit?.message ?? ''
      const lines = msg.split('\n')
      const title = lines[0].trim()
      // Cuerpo sin la primera línea y sin los trailers (Co-Authored-By, etc.).
      const body = lines
        .slice(1)
        .filter((l) => !/^Co-Authored-By:/i.test(l.trim()) && !/Generated with \[?Claude/i.test(l))
        .join('\n')
        .trim()
      return {
        sha: c.sha,
        shortSha: c.sha.slice(0, 7),
        title,
        body,
        author: c.commit?.author?.name || c.author?.login || '',
        date: c.commit?.author?.date || c.created || '',
        url: c.html_url,
      }
    })
    return { commits, totalPages }
  } catch {
    return { commits: [], totalPages: 1 }
  }
}