import { config } from '../config.js'
import {
  listDocuments,
  getDocument,
  createDocument,
  Query,
  ID,
} from './appwriteAdmin.js'

const WSID_START = 100000

function formatToday() {
  const d = new Date()
  const y = d.getFullYear()
  const m = String(d.getMonth() + 1).padStart(2, '0')
  const day = String(d.getDate()).padStart(2, '0')
  return `${y}${m}${day}`
}

function formatTimeNow() {
  const d = new Date()
  return `${String(d.getHours()).padStart(2, '0')}${String(d.getMinutes()).padStart(2, '0')}`
}

async function generateNextWsid() {
  const docs = await listDocuments(config.collections.worksheets, [
    Query.orderDesc('wsid'),
    Query.limit(1),
  ])
  const highest = docs[0]?.wsid ? parseInt(docs[0].wsid, 10) : WSID_START - 1
  return String(Math.max(WSID_START, highest + 1))
}

async function gitWorksheetExists(woid, commitSha) {
  if (!commitSha) return false
  const docs = await listDocuments(config.collections.worksheets, [
    Query.equal('woid', woid),
    Query.limit(100),
  ])
  const marker = `Commit: ${commitSha.slice(0, 7)}`
  return docs.some((doc) => doc.details?.includes(marker) || doc.details?.includes(commitSha))
}

function formatCommitLines(commits, repoFullName) {
  if (!Array.isArray(commits) || commits.length === 0) {
    return '- (keine Commit-Details im Webhook)'
  }

  return commits
    .map((commit) => {
      const sha = (commit.id || commit.sha || '').slice(0, 7)
      const message = (commit.message || '').split('\n')[0]
      const author = commit.author?.name || commit.committer?.name || 'Unbekannt'
      const url = commit.url || `${config.gitea.baseUrl}/${repoFullName}/commit/${commit.id || commit.sha}`
      return `- [${sha}](${url}): ${message} (${author})`
    })
    .join('\n')
}

export async function createGitPushWorksheet({
  ticketId,
  repoFullName,
  branch,
  commits = [],
  pusher,
  commitSha,
}) {
  if (!ticketId) return null

  let workorder
  try {
    workorder = await getDocument(config.collections.workorders, ticketId)
  } catch {
    console.warn('[gitWorksheet] Workorder nicht gefunden:', ticketId)
    return null
  }

  const woid = workorder.woid
  if (!woid) return null

  if (await gitWorksheetExists(woid, commitSha)) {
    return { skipped: true, reason: 'duplicate_commit' }
  }

  const wsid = await generateNextWsid()
  const pusherName = pusher?.full_name || pusher?.username || pusher?.login || 'Gitea'
  const latestCommit = commits[commits.length - 1] || commits[0]
  const details = [
    `Git Push auf \`${repoFullName}\` (Branch: ${branch})`,
    `Commit: ${commitSha?.slice(0, 7) || latestCommit?.id?.slice(0, 7) || '?'}`,
    '',
    formatCommitLines(commits, repoFullName),
  ].join('\n')

  const today = formatToday()
  const worksheet = await createDocument(
    config.collections.worksheets,
    {
      wsid,
      woid: String(woid),
      workorderId: ticketId,
      employeeId: 'gitea',
      employeeName: pusherName,
      employeeShort: 'GIT',
      serviceType: 'GIT',
      oldStatus: workorder.status || '',
      newStatus: workorder.status || '',
      oldResponseLevel: workorder.response || '',
      newResponseLevel: workorder.response || '',
      totalTime: 0,
      startDate: today,
      startTime: formatTimeNow(),
      endDate: today,
      endTime: formatTimeNow(),
      details,
      isComment: true,
      createdAt: new Date().toISOString(),
    },
    ID.unique()
  )

  return { created: true, wsid, worksheetId: worksheet.$id }
}