/**
 * apes:* tab registration tests (Phase 1/1b → C7: 5 tabs). The fork registers
 * its information-layer tabs (tasks / agents / apps / messages / profile)
 * through the same BetterSidebarService the upstream builtins use (dogfood).
 * `apesTasks` is back (C7 reversal of C6): the native DSH session tree focuses
 * ONE lineage, while this panel is a flat, whole-workspace list with a running
 * badge and an idle filter — the overlap is complementary.
 *
 * The spec pins: the registration contract (id / single / order / component /
 * icon), the two Phase-2 increments (running-count + subagent-count `badge`
 * functions, and the C4 `visible` pause on the sessions-list feed), the
 * `showInactive` plugin-toggle channel, the PURE row helpers, and the isolated
 * i18n contract (zh / ja / en parity + active-locale resolution).
 *
 * Runs in the node vitest environment like builtins.spec.ts — no DOM, no
 * real DSH host (a live cordis scratch mount is covered by the mount e2e).
 */
import { describe, expect, it } from 'vitest'
// Browser globals before the client graph loads (mirror of builtins.spec.ts).
import './browser-globals.ts'

import type { Context } from '../src/context-types.ts'
import type { SidebarSessionList, SidebarSessionSummary } from '../src/context-types.ts'
import { createBetterSidebarService } from '../src/client/service.ts'
import type { SessionScope, SidebarState, TabComponentProps } from '../src/client/service.ts'
import { createSidebarStore } from '../src/client/state.ts'
import { registerApesTabs } from '../src/client/apes/index.ts'
import { apesZh, apesEn, apesJa, attachApesLocale, t, type ApesCopyKey } from '../src/client/apes/locales.ts'
import {
  NOOP_SUBSCRIBE,
  TASKS_SHOW_INACTIVE_KEY,
  TASKS_TAB_ID,
  apesTabs,
  feedSubscribe,
  runningSessionCount,
  subagentCount,
  tasksRows,
  tasksShowInactive,
} from '../src/client/apes/tabs.tsx'

const APES_TAB_IDS = ['apesAgents', 'apesApps', 'apesMessages', 'apesProfile', 'apesTasks']

function setup(): {
  service: ReturnType<typeof createBetterSidebarService>
  store: ReturnType<typeof createSidebarStore>
  dispose: () => void
} {
  const store = createSidebarStore()
  const service = createBetterSidebarService(store)
  const dispose = registerApesTabs({} as Context, service)
  return { service, store, dispose }
}

/** A durable session row fixture. */
function row(id: string, over: Partial<SidebarSessionSummary> = {}): SidebarSessionSummary {
  return { id, displayTitle: id, ...over }
}

/** A session-list snapshot fixture. */
function snap(current: string | undefined, rows: readonly SidebarSessionSummary[]): SidebarSessionList {
  return { current, byId: Object.fromEntries(rows.map(r => [r.id, r])) }
}

/** A minimal ctx carrying only the sessions-list feed the apes views read. */
function fakeCtx(list: SidebarSessionList, onSubscribe?: () => void): Context {
  return {
    sessions: {
      list: {
        getSnapshot: () => list,
        subscribe: () => {
          onSubscribe?.()
          return () => {}
        },
      },
    },
  } as unknown as Context
}

/** Invoke a descriptor's badge with a fixture snapshot. */
function badgeOf(id: string, list: SidebarSessionList, sessionId = 'main'): string | number | null | undefined {
  const descriptor = apesTabs.find(d => d.id === id)
  expect(descriptor, `${id} descriptor`).toBeDefined()
  return descriptor?.badge?.(
    fakeCtx(list),
    { sessionId } as SessionScope,
    {} as SidebarState,
  )
}

describe('apes:* tab registrations', () => {
  it('registers the 5 apes tabs with the apes: namespace', () => {
    const { service, dispose } = setup()
    try {
      expect(service.getTabs().map(t => t.id).sort()).toEqual(APES_TAB_IDS)
    } finally {
      dispose()
    }
  })

  it('every apes tab is single-instance, visible, and component-carrying', () => {
    const { service, dispose } = setup()
    try {
      for (const id of APES_TAB_IDS) {
        const tab = service.getTab(id)
        expect(tab, `${id} registered`).toBeDefined()
        expect(tab?.single, `${id} single`).toBe(true)
        expect(tab?.hidden, `${id} hidden`).not.toBe(true)
        expect(tab?.component, `${id} component`).toBeDefined()
        expect(tab?.icon, `${id} icon`).toBeDefined()
        expect(typeof tab?.title === 'function' ? tab.title() : tab?.title, `${id} title`).toBeTruthy()
      }
    } finally {
      dispose()
    }
  })

  it('apes tabs sort after the upstream builtins (order 40+) in reading order', () => {
    const { service, dispose } = setup()
    try {
      const orders = {
        tasks: service.getTab(TASKS_TAB_ID)?.order,
        agents: service.getTab('apesAgents')?.order,
        apps: service.getTab('apesApps')?.order,
        messages: service.getTab('apesMessages')?.order,
        profile: service.getTab('apesProfile')?.order,
      }
      // C8: order 40-50 places apes tabs immediately after the native builtins
      // (10-35), not in a far-away 900+ band — visual unity in the tab strip.
      for (const [id, order] of Object.entries(orders)) {
        expect(order, `${id} order`).toBeGreaterThanOrEqual(40)
      }
      // Strictly ordered: tasks < agents < apps < messages < profile.
      expect(orders.tasks!).toBeLessThan(orders.agents!)
      expect(orders.agents!).toBeLessThan(orders.apps!)
      expect(orders.apps!).toBeLessThan(orders.messages!)
      expect(orders.messages!).toBeLessThan(orders.profile!)
    } finally {
      dispose()
    }
  })

  it('the disposer unregisters all apes tabs (HMR-safe)', () => {
    const store = createSidebarStore()
    const service = createBetterSidebarService(store)
    const dispose = registerApesTabs({} as Context, service)
    expect(service.getTabs()).toHaveLength(5)
    dispose()
    expect(service.getTabs()).toHaveLength(0)
  })
})

describe('apesTasks plugin toggles', () => {
  it('declares the showInactive switch under the tasks descriptor', () => {
    const descriptor = apesTabs.find(d => d.id === TASKS_TAB_ID)
    const toggles = descriptor?.settings?.pluginToggles ?? []
    expect(toggles).toHaveLength(1)
    const toggle = toggles[0]
    expect(toggle?.key).toBe(TASKS_SHOW_INACTIVE_KEY)
    expect(toggle?.key).toBe('showInactive')
    expect(toggle?.type).toBe('switch')
    expect(typeof toggle?.title === 'function' ? toggle.title() : toggle?.title).toBeTruthy()
  })

  it('defaults to showing every session when no pref is stored', () => {
    const store = { getPrefs: () => ({}) } as unknown as TabComponentProps['store']
    expect(tasksShowInactive(store)).toBe(true)
  })

  it('reads the boolean from pluginSettings[apesTasks]', () => {
    const store = {
      getPrefs: () => ({ pluginSettings: { [TASKS_TAB_ID]: { [TASKS_SHOW_INACTIVE_KEY]: false } } }),
    } as unknown as TabComponentProps['store']
    expect(tasksShowInactive(store)).toBe(false)
  })

  it('ignores non-boolean values and failing stores (fail soft)', () => {
    const odd = {
      getPrefs: () => ({ pluginSettings: { [TASKS_TAB_ID]: { [TASKS_SHOW_INACTIVE_KEY]: 'nope' } } }),
    } as unknown as TabComponentProps['store']
    expect(tasksShowInactive(odd)).toBe(true)
    const broken = { getPrefs: () => { throw new Error('no prefs') } } as unknown as TabComponentProps['store']
    expect(tasksShowInactive(broken)).toBe(true)
  })
})

describe('apesTasks row selection (PURE)', () => {
  it('ranks current first, then running, then idle', () => {
    const list = snap('idle-b', [
      row('idle-a'),
      row('run-2', { running: true }),
      row('idle-b'),
      row('run-1', { running: true }),
    ])
    expect(tasksRows(list, true).map(r => r.id)).toEqual(['idle-b', 'run-1', 'run-2', 'idle-a'])
  })

  it('hides idle sessions when showInactive is false', () => {
    const list = snap('main', [row('main'), row('work', { running: true }), row('sleeping')])
    // C-2 fidelity: v2.0.0 filters on `running` alone, so an idle *current*
    // session is dropped too — the toggle means "idle sessions disappear",
    // not "always keep the one I am looking at".
    expect(tasksRows(list, false).map(r => r.id)).toEqual(['work'])
    expect(tasksRows(list, true).map(r => r.id)).toEqual(['main', 'work', 'sleeping'])
  })

  it('never lists side-chat threads (they are not topology)', () => {
    const list = snap('main', [row('main'), row('side', { origin: 'subagent', displayTitle: 'Side: main' })])
    expect(tasksRows(list, true).map(r => r.id)).toEqual(['main'])
  })

  it('counts running sessions for the badge', () => {
    const list = snap('main', [
      row('main', { running: true }),
      row('child', { running: true, origin: 'subagent', parentId: 'main' }),
      row('idle'),
      row('side', { origin: 'subagent', displayTitle: 'Side: main' }),
    ])
    expect(runningSessionCount(list)).toBe(2)
  })
})

describe('apesAgents badge + topology count', () => {
  it('counts the subagents of the current session tree only', () => {
    const list = snap('main', [
      row('main'),
      row('c1', { origin: 'subagent', parentId: 'main' }),
      row('c2', { origin: 'subagent', parentId: 'c1' }),
      row('other'),
      row('o1', { origin: 'subagent', parentId: 'other' }),
    ])
    expect(subagentCount(list, 'main')).toBe(2)
    expect(subagentCount(list, 'c1')).toBe(2)
    expect(subagentCount(list, 'other')).toBe(1)
    expect(subagentCount(list, 'unknown')).toBe(0)
  })

  it('excludes side-chat threads from the count', () => {
    const list = snap('main', [
      row('main'),
      row('side', { origin: 'subagent', parentId: 'main', displayTitle: 'Side: main' }),
      row('c1', { origin: 'subagent', parentId: 'main' }),
    ])
    expect(subagentCount(list, 'main')).toBe(1)
  })
})

describe('apes badge contract', () => {
  it('badges the tasks tab with the running count, null when idle', () => {
    expect(badgeOf(TASKS_TAB_ID, snap('main', [row('a', { running: true }), row('b')]))).toBe(1)
    expect(badgeOf(TASKS_TAB_ID, snap('main', [row('a'), row('b')]))).toBeNull()
  })

  it('badges the agents tab with the subagent count, null when childless', () => {
    expect(badgeOf('apesAgents', snap('main', [row('main'), row('c1', { origin: 'subagent', parentId: 'main' })]), 'main')).toBe(1)
    expect(badgeOf('apesAgents', snap('main', [row('main')]), 'main')).toBeNull()
  })

  it('never badges the placeholder/static tabs', () => {
    for (const id of ['apesApps', 'apesMessages', 'apesProfile']) {
      expect(apesTabs.find(d => d.id === id)?.badge, `${id} badge`).toBeUndefined()
    }
  })
})

describe('apes C4 visible pause', () => {
  it('does not touch the sessions feed while the tab is hidden', () => {
    let subscribed = 0
    const ctx = fakeCtx(snap('main', [row('main')]), () => { subscribed += 1 })
    feedSubscribe(ctx, false)
    expect(subscribed).toBe(0)
    const stop = feedSubscribe(ctx, true) (() => {})
    expect(subscribed).toBe(1)
    expect(typeof stop).toBe('function')
    stop()
  })

  it('exposes a stable no-op subscription', () => {
    const stop = NOOP_SUBSCRIBE()
    expect(typeof stop).toBe('function')
    expect(() => stop()).not.toThrow()
  })
})

describe('apes i18n contract', () => {
  it('every apesZh key has an en entry (no missing translations)', () => {
    const zhKeys = Object.keys(apesZh) as ApesCopyKey[]
    for (const key of zhKeys) {
      expect(apesEn[key], `en entry for ${key}`).toBeDefined()
      expect(typeof apesEn[key]).toBe('string')
      expect((apesEn[key] ?? '').length).toBeGreaterThan(0)
    }
  })

  it('every apesZh key has a ja entry (AGENTS §5)', () => {
    const zhKeys = Object.keys(apesZh) as ApesCopyKey[]
    for (const key of zhKeys) {
      expect(apesJa[key], `ja entry for ${key}`).toBeDefined()
      expect(typeof apesJa[key]).toBe('string')
      expect((apesJa[key] ?? '').length).toBeGreaterThan(0)
    }
  })

  it('resolves zh when the DSH preference is zh', () => {
    attachApesLocale({ getSnapshot: () => ({ active: 'zh-CN' }) })
    expect(t('apesAgentsTitle')).toBe('智能体')
    expect(t('apesAppsTitle')).toBe('应用')
    expect(t('apesProfileTitle')).toBe('画像')
  })

  it('resolves the new tasks/messages titles in zh', () => {
    attachApesLocale({ getSnapshot: () => ({ active: 'zh' }) })
    expect(t('apesTasksTitle')).toBe('任务')
    expect(t('apesMessagesTitle')).toBe('消息')
  })

  it('resolves en when the DSH preference is en', () => {
    attachApesLocale({ getSnapshot: () => ({ active: 'en' }) })
    expect(t('apesAgentsTitle')).toBe('Agents')
    expect(t('apesAppsTitle')).toBe('Apps')
    expect(t('apesProfileTitle')).toBe('Profile')
    expect(t('apesTasksTitle')).toBe('Tasks')
  })

  it('resolves ja when the DSH preference is ja', () => {
    attachApesLocale({ getSnapshot: () => ({ active: 'ja-JP' }) })
    expect(t('apesAgentsTitle')).toBe('エージェント')
    expect(t('apesTasksTitle')).toBe('タスク')
    expect(t('apesMessagesTitle')).toBe('メッセージ')
  })

  it('falls back to zh when no locale service is attached', () => {
    attachApesLocale(undefined)
    expect(t('apesAgentsTitle')).toBe('智能体')
  })
})