import type { ReleaseCommit, ReleaseCommitGroup } from './messages'

/** 能勾选的提交：带不兼容迁移的不算 */
export function pickableShas(commits: ReleaseCommit[]): string[] {
  return commits.filter(c => !c.migration?.blocked).map(c => c.sha)
}

export function uniqueAuthors(groups: ReleaseCommitGroup[]): string[] {
  const out: string[] = []
  for (const g of groups) {
    for (const a of g.authors) {
      if (!out.includes(a))
        out.push(a)
    }
  }
  return out
}

export function filterCherryPickGroups(
  groups: ReleaseCommitGroup[],
  query: string,
  authors: ReadonlySet<string>,
): ReleaseCommitGroup[] {
  const q = query.trim().toLowerCase()
  const out: ReleaseCommitGroup[] = []
  for (const g of groups) {
    const commits = g.commits.filter(c => authors.has(c.author))
    if (commits.length === 0)
      continue
    if (!q) {
      out.push({ ...g, authors: uniqueAuthors([{ ...g, commits }]), commits })
      continue
    }
    const head = `#${g.pr ?? ''} ${g.title} ${g.authors.join(' ')}`.toLowerCase()
    if (head.includes(q)) {
      out.push({ ...g, authors: uniqueAuthors([{ ...g, commits }]), commits })
      continue
    }
    const hit = commits.filter(c =>
      `${c.subject} ${c.author} ${c.sha} ${c.date}`.toLowerCase().includes(q),
    )
    if (hit.length > 0)
      out.push({ ...g, authors: uniqueAuthors([{ ...g, commits: hit }]), commits: hit })
  }
  return out
}

export function groupContainingSha(groups: ReleaseCommitGroup[], sha: string | undefined): ReleaseCommitGroup | undefined {
  if (!sha)
    return undefined
  return groups.find(g => g.commits.some(c => c.sha === sha))
}