import type { Issue, IssueColumn } from '../gitea/types'

const COLUMNS: readonly IssueColumn[] = ['todo', 'in-progress', 'review', 'done']

/** 非空字符串才算有值：状态里写空串表示把字段清掉。 */
const STRING_FIELDS = [
  'sessionId',
  'implementSessionId',
  'reviewSessionId',
  'testSessionId',
  'prototypeSessionId',
  'profilePath',
  'brainstormProfilePath',
  'testProfilePath',
  'prototypeProfilePath',
  'pr',
  'prMergedAt',
  'branch',
  'worktreePath',
  'color',
  'handoffBundleKey',
  'handoffFrom',
  'handoffRequestFrom',
  'handoffRequestError',
] as const

const BOOLEAN_FIELDS = ['prMerged', 'autoReview', 'reviewPassed'] as const

/** 状态里能直接放到卡片上的字段；读不出合法值的字段不出现。 */
export type IssueStateFields = Partial<Pick<Issue, CardStateField>>

type CardStateField = 'column' | 'specFile' | 'planFile' | 'prototypeFile' | 'prDiffFile' | 'implementStatus' | typeof STRING_FIELDS[number] | typeof BOOLEAN_FIELDS[number]

/**
 * 过滤 specFile / planFile 里的垃圾值：真实路径必须含 `/` 且以 `.md` 结尾。
 *
 * `...`、`…` 是 cc 在头脑风暴阶段往工单正文里写的占位说明，旧版 webhook 曾把它们当路径存进状态，读出时在这里清掉。
 */
export function isValidSpxFilePath(v: unknown): v is string {
  return typeof v === 'string'
    && v.length > 0
    && v.includes('/')
    && v.endsWith('.md')
    && v !== '...'
    && v !== '…'
}

/** prototypeFile 指向 Figma 插件的 manifest.json，规则同 [isValidSpxFilePath]，只是后缀换成 `.json`。 */
function isValidPrototypeFilePath(v: unknown): v is string {
  return typeof v === 'string'
    && v.length > 0
    && v.includes('/')
    && v.endsWith('.json')
    && v !== '...'
    && v !== '…'
}

function isValidPrDiffFilePath(v: unknown): v is string {
  return typeof v === 'string' && /^docs\/pr-diff\/\S+\.md$/.test(v)
}

function isIssueColumn(v: unknown): v is IssueColumn {
  return typeof v === 'string' && (COLUMNS as readonly string[]).includes(v)
}

/** 把一份工单状态翻成卡片字段，只留合法的值，代码托管仓库和 YouTrack 的卡片都按它读。 */
export function issueStateFields(state: Record<string, unknown>): IssueStateFields {
  const out: Record<string, unknown> = {}
  if (isIssueColumn(state.column))
    out.column = state.column
  for (const field of STRING_FIELDS) {
    const v = state[field]
    if (typeof v === 'string' && v.length > 0)
      out[field] = v
  }
  for (const field of BOOLEAN_FIELDS) {
    if (typeof state[field] === 'boolean')
      out[field] = state[field]
  }
  if (isValidSpxFilePath(state.specFile))
    out.specFile = state.specFile
  if (isValidSpxFilePath(state.planFile))
    out.planFile = state.planFile
  if (isValidPrototypeFilePath(state.prototypeFile))
    out.prototypeFile = state.prototypeFile
  if (isValidPrDiffFilePath(state.prDiffFile))
    out.prDiffFile = state.prDiffFile
  if (state.implementStatus === 'running' || state.implementStatus === 'done' || state.implementStatus === 'failed')
    out.implementStatus = state.implementStatus
  return out as IssueStateFields
}