/**
 * KIN-103: Тесты worktrees_enabled toggle в SettingsView
 *
 * Проверяет:
 * 1. Интерфейс Project содержит worktrees_enabled: number | null
 * 2. patchProject принимает worktrees_enabled?: boolean
 * 3. Инициализацию из числовых значений (0, 1, null) → !!()
 * 4. Toggle вызывает PATCH с true/false
 * 5. Откат при ошибке PATCH
 * 6. Checkbox disabled пока идёт сохранение
 * 7. Статусные сообщения (Saved / Error)
 */

import { describe, it, expect, vi, beforeEach } from 'vitest'
import { mount, flushPromises } from '@vue/test-utils'
import SettingsView from '../SettingsView.vue'

vi.mock('../../api', async (importOriginal) => {
  const actual = await importOriginal<typeof import('../../api')>()
  return {
    ...actual,
    api: {
      projects: vi.fn(),
      patchProject: vi.fn(),
      syncObsidian: vi.fn(),
      projectLinks: vi.fn().mockResolvedValue([]),
    },
  }
})

import { api } from '../../api'

const BASE_PROJECT = {
  id: 'proj-1',
  name: 'Test Project',
  path: '/projects/test',
  status: 'active',
  priority: 5,
  tech_stack: ['python'],
  execution_mode: null,
  autocommit_enabled: null,
  auto_test_enabled: null,
  worktrees_enabled: null as number | null,
  obsidian_vault_path: null,
  deploy_command: null,
  test_command: null,
  deploy_host: null,
  deploy_path: null,
  deploy_runtime: null,
  deploy_restart_cmd: null,
  created_at: '2024-01-01',
  total_tasks: 0,
  done_tasks: 0,
  active_tasks: 0,
  blocked_tasks: 0,
  review_tasks: 0,
  project_type: null,
  ssh_host: null,
  ssh_user: null,
  ssh_key_path: null,
  ssh_proxy_jump: null,
  description: null,
}

beforeEach(() => {
  vi.clearAllMocks()
  vi.mocked(api.patchProject).mockResolvedValue(BASE_PROJECT as any)
})

async function mountSettings(overrides: Partial<typeof BASE_PROJECT> = {}) {
  const project = { ...BASE_PROJECT, ...overrides }
  vi.mocked(api.projects).mockResolvedValue([project as any])
  const wrapper = mount(SettingsView)
  await flushPromises()
  return wrapper
}

function findWorktreesCheckbox(wrapper: ReturnType<typeof mount>) {
  const labels = wrapper.findAll('label')
  const worktreesLabel = labels.find(l => l.text().includes('Worktrees'))
  const checkbox = worktreesLabel?.find('input[type="checkbox"]')
  // decision #544: assertion безусловная — ложный зелёный недопустим
  expect(checkbox?.exists()).toBe(true)
  return checkbox!
}

// ─────────────────────────────────────────────────────────────
// 1. Инициализация из числовых значений
// ─────────────────────────────────────────────────────────────
describe('worktreesEnabled — инициализация', () => {
  it('worktrees_enabled=1 → checkbox checked', async () => {
    const wrapper = await mountSettings({ worktrees_enabled: 1 })
    const checkbox = findWorktreesCheckbox(wrapper)
    expect((checkbox.element as HTMLInputElement).checked).toBe(true)
  })

  it('worktrees_enabled=0 → checkbox unchecked', async () => {
    const wrapper = await mountSettings({ worktrees_enabled: 0 })
    const checkbox = findWorktreesCheckbox(wrapper)
    expect((checkbox.element as HTMLInputElement).checked).toBe(false)
  })

  it('worktrees_enabled=null → checkbox unchecked', async () => {
    const wrapper = await mountSettings({ worktrees_enabled: null })
    const checkbox = findWorktreesCheckbox(wrapper)
    expect((checkbox.element as HTMLInputElement).checked).toBe(false)
  })
})

// ─────────────────────────────────────────────────────────────
// 2. Toggle → patchProject вызывается с корректным значением
// ─────────────────────────────────────────────────────────────
describe('toggleWorktrees — вызов patchProject', () => {
  it('toggle с unchecked → patchProject({ worktrees_enabled: true })', async () => {
    const wrapper = await mountSettings({ worktrees_enabled: 0 })
    await findWorktreesCheckbox(wrapper).trigger('change')
    await flushPromises()

    expect(vi.mocked(api.patchProject)).toHaveBeenCalledWith(
      'proj-1',
      expect.objectContaining({ worktrees_enabled: true }),
    )
  })

  it('toggle с checked → patchProject({ worktrees_enabled: false }), не undefined (decision #524)', async () => {
    const wrapper = await mountSettings({ worktrees_enabled: 1 })
    await findWorktreesCheckbox(wrapper).trigger('change')
    await flushPromises()

    const payload = vi.mocked(api.patchProject).mock.calls[0][1] as any
    expect(payload.worktrees_enabled).toBe(false)
    expect(payload.worktrees_enabled).not.toBeUndefined()
  })
})

// ─────────────────────────────────────────────────────────────
// 3. Откат при ошибке PATCH
// ─────────────────────────────────────────────────────────────
describe('toggleWorktrees — откат при ошибке PATCH', () => {
  it('ошибка при включении: checkbox откатывается обратно к unchecked', async () => {
    vi.mocked(api.patchProject).mockRejectedValueOnce(new Error('network error'))
    const wrapper = await mountSettings({ worktrees_enabled: 0 })
    await findWorktreesCheckbox(wrapper).trigger('change')
    await flushPromises()

    expect((findWorktreesCheckbox(wrapper).element as HTMLInputElement).checked).toBe(false)
  })

  it('ошибка при выключении: checkbox откатывается обратно к checked', async () => {
    vi.mocked(api.patchProject).mockRejectedValueOnce(new Error('server error'))
    const wrapper = await mountSettings({ worktrees_enabled: 1 })
    await findWorktreesCheckbox(wrapper).trigger('change')
    await flushPromises()

    expect((findWorktreesCheckbox(wrapper).element as HTMLInputElement).checked).toBe(true)
  })
})

// ─────────────────────────────────────────────────────────────
// 4. Disabled во время сохранения
// ─────────────────────────────────────────────────────────────
describe('toggleWorktrees — disabled во время сохранения', () => {
  it('checkbox disabled пока идёт PATCH, enabled после завершения', async () => {
    let resolveRequest!: (v: any) => void
    vi.mocked(api.patchProject).mockImplementationOnce(
      () => new Promise(resolve => { resolveRequest = resolve }),
    )

    const wrapper = await mountSettings({ worktrees_enabled: 0 })
    const checkbox = findWorktreesCheckbox(wrapper)
    await checkbox.trigger('change')

    // savingWorktrees = true → checkbox должен быть disabled
    expect((checkbox.element as HTMLInputElement).disabled).toBe(true)

    resolveRequest(BASE_PROJECT)
    await flushPromises()

    expect((checkbox.element as HTMLInputElement).disabled).toBe(false)
  })
})

// ─────────────────────────────────────────────────────────────
// 5. Статусные сообщения
// ─────────────────────────────────────────────────────────────
describe('toggleWorktrees — статусное сообщение', () => {
  it('успех → показывает "Saved"', async () => {
    const wrapper = await mountSettings({ worktrees_enabled: 0 })
    await findWorktreesCheckbox(wrapper).trigger('change')
    await flushPromises()

    expect(wrapper.text()).toContain('Saved')
  })

  it('ошибка → показывает "Error: <message>"', async () => {
    vi.mocked(api.patchProject).mockRejectedValueOnce(new Error('connection timeout'))
    const wrapper = await mountSettings({ worktrees_enabled: 0 })
    await findWorktreesCheckbox(wrapper).trigger('change')
    await flushPromises()

    expect(wrapper.text()).toContain('Error: connection timeout')
  })
})