import type { HandoffProfiles, HandoffSessions } from '../../cc/handoffManifest'
import type { IssueColumn } from '../../gitea/types'
import { LOCAL_STATE_FIELDS } from '../../issues/localState'

export function canStartHandoff(issue: {
  source?: 'gitea' | 'youtrack'
  column: IssueColumn
  handoffAttachmentId?: string
}): boolean {
  return issue.source !== 'youtrack' && issue.column !== 'done' && !issue.handoffAttachmentId
}

export function canAcceptHandoff(issue: {
  source?: 'gitea' | 'youtrack'
  handoffAttachmentId?: string
  assignees?: string[]
}, me: string | undefined): boolean {
  return issue.source !== 'youtrack'
    && !!issue.handoffAttachmentId
    && me !== undefined
    && (issue.assignees ?? []).includes(me)
}

/** 移交前 worktree 必须「干净 + 全部 push」，否则接管方从远端重建会丢工作。 */
export function checkWorktreePushed(input: {
  statusPorcelain: string
  localHead: string
  remoteHead: string
}): { ok: true } | { ok: false, reason: string } {
  if (input.statusPorcelain.trim().length > 0)
    return { ok: false, reason: '工作区有未提交改动，请先提交并 push' }
  if (input.localHead.trim() !== input.remoteHead.trim())
    return { ok: false, reason: '本地分支与远端不一致，请先 push' }
  return { ok: true }
}

export function handoffStartedStateExtra(attachmentId: number, from: string): Record<string, unknown> {
  const extra: Record<string, unknown> = { handoffAttachmentId: String(attachmentId), handoffFrom: from }
  for (const f of LOCAL_STATE_FIELDS)
    extra[f] = ''
  return extra
}

export function handoffStartedUiPatch(attachmentId: number, from: string, to: string): Record<string, unknown> {
  return {
    handoffAttachmentId: String(attachmentId),
    handoffFrom: from,
    assignees: [to],
    sessionId: null,
    implementSessionId: null,
    reviewSessionId: null,
    testSessionId: null,
    worktreePath: null,
    worktreeExists: false,
  }
}

function definedEntries(o: Record<string, any>): Record<string, string> {
  const out: Record<string, string> = {}
  for (const [k, v] of Object.entries(o)) {
    if (v)
      out[k] = v
  }
  return out
}

export function handoffAcceptedStateExtra(local: {
  sessions: HandoffSessions
  profiles: HandoffProfiles
  worktreePath?: string
}): Record<string, unknown> {
  return {
    handoffAttachmentId: '',
    handoffFrom: '',
    ...definedEntries(local.sessions),
    ...definedEntries(local.profiles),
    ...(local.worktreePath ? { worktreePath: local.worktreePath } : {}),
  }
}

export function handoffAcceptedUiPatch(local: {
  sessions: HandoffSessions
  profiles: HandoffProfiles
  worktreePath?: string
  worktreeExists: boolean
}): Record<string, unknown> {
  return {
    handoffAttachmentId: null,
    handoffFrom: null,
    ...definedEntries(local.sessions),
    ...definedEntries(local.profiles),
    ...(local.worktreePath ? { worktreePath: local.worktreePath } : {}),
    worktreeExists: local.worktreeExists,
  }
}