import { describe, expect, it } from 'vitest'
import { findTerminalByTabLabel, focusedTerminal, FocusedTerminalTracker } from './terminalTabs'

const t371 = { name: 'issue-371-测试' }
const t257 = { name: 'issue-257-实施 (feature/billing)' }
const t37 = { name: 'issue-37-测试' }
const terminals = [t37, t371, t257]

describe('findTerminalByTabLabel', () => {
  it('精确匹配优先', () => {
    expect(findTerminalByTabLabel(terminals, 'issue-371-测试')).toBe(t371)
  })

  it('tab label 被 OSC title 追加后缀时按前缀匹配', () => {
    expect(findTerminalByTabLabel(terminals, 'issue-371-测试 (main)')).toBe(t371)
  })

  it('terminal name 带后缀而 label 是原名时也能匹配', () => {
    expect(findTerminalByTabLabel(terminals, 'issue-257-实施')).toBe(t257)
  })

  it('issue-37 不会误配 issue-371', () => {
    expect(findTerminalByTabLabel(terminals, 'issue-37-测试')).toBe(t37)
  })

  it('找不到返回 undefined', () => {
    expect(findTerminalByTabLabel(terminals, 'Project Dashboard')).toBeUndefined()
  })
})

describe('focusedTerminal', () => {
  const isTerminal = (input: unknown): boolean => input === 'terminal'

  it('活动 tab 是终端 → 解析出对应终端', () => {
    expect(focusedTerminal({ label: 'issue-371-测试', input: 'terminal' }, isTerminal, terminals)).toBe(t371)
  })

  it('活动 tab 不是终端（看板 webview）→ undefined', () => {
    expect(focusedTerminal({ label: 'Superpowers Kanban', input: 'webview' }, isTerminal, terminals)).toBeUndefined()
  })

  it('没有活动 tab → undefined', () => {
    expect(focusedTerminal(undefined, isTerminal, terminals)).toBeUndefined()
  })
})

describe('focusedTerminalTracker', () => {
  it('只开一个终端 tab：点回看板再点回该 tab 要再次触发', () => {
    const tracker = new FocusedTerminalTracker<{ name: string }>()
    expect(tracker.sync(t371)).toBe(t371)
    expect(tracker.sync(undefined)).toBeUndefined()
    expect(tracker.sync(t371)).toBe(t371)
  })

  it('同一终端重复上报（label 改写）不触发', () => {
    const tracker = new FocusedTerminalTracker<{ name: string }>()
    expect(tracker.sync(t371)).toBe(t371)
    expect(tracker.sync(t371)).toBeUndefined()
    expect(tracker.sync(t371)).toBeUndefined()
  })

  it('在终端之间切换触发新终端', () => {
    const tracker = new FocusedTerminalTracker<{ name: string }>()
    expect(tracker.sync(t371)).toBe(t371)
    expect(tracker.sync(t257)).toBe(t257)
    expect(tracker.sync(t371)).toBe(t371)
  })

  it('焦点离开终端不触发', () => {
    const tracker = new FocusedTerminalTracker<{ name: string }>()
    tracker.sync(t371)
    expect(tracker.sync(undefined)).toBeUndefined()
  })
})