import { afterEach, describe, expect, it, vi } from 'vitest'

describe('ConfigService suggestion tuning migration', () => {
  afterEach(() => {
    vi.doUnmock('electron-store')
    vi.resetModules()
  })

  it('revision 3은 새 delay와 분당 상한만 바꾸고 기존 개인 설정을 보존한다', async () => {
    const savedBindings = {
      'suggestion-accept': [
        { device: 'keyboard' as const, code: 65, ctrl: true, alt: false, shift: false, meta: false }
      ]
    }
    const persisted = {
      suggestionTuningRevision: 3,
      suggestionTriggerDelayMs: 300,
      suggestionMaxRequestsPerMinute: 12,
      suggestionMinPrefixChars: 17,
      suggestionDailyBudget: 777,
      suggestionRequestTimeoutMs: 23000,
      keyBindings: savedBindings
    }

    class TestStore<T extends Record<string, unknown>> {
      store: T

      constructor(options: { defaults: T }) {
        this.store = { ...options.defaults, ...persisted } as T
      }

      get<K extends keyof T>(key: K): T[K] {
        return this.store[key]
      }

      set<K extends keyof T>(key: K, value: T[K]): void {
        this.store[key] = value
      }

      delete(key: string): void {
        delete this.store[key as keyof T]
      }
    }

    vi.doMock('electron-store', () => ({ default: TestStore }))
    const { configGet, initConfigService, resetInMemoryConfig } = await import(
      '../../../src/main/services/ConfigService'
    )
    await initConfigService()

    expect(configGet('suggestionTuningRevision')).toBe(5)
    expect(configGet('suggestionTriggerDelayMs')).toBe(600)
    expect(configGet('suggestionMaxRequestsPerMinute')).toBe(6)
    expect(configGet('suggestionMinPrefixChars')).toBe(17)
    expect(configGet('suggestionDailyBudget')).toBe(777)
    expect(configGet('suggestionRequestTimeoutMs')).toBe(23000)
    // 옛 기본값이 아닌 커스터마이즈(Ctrl+A)는 revision 5 마이그레이션도 건드리지 않는다.
    expect(configGet('keyBindings')['suggestion-accept']).toEqual(savedBindings['suggestion-accept'])

    resetInMemoryConfig()
  })

  function makeTestStore<T extends Record<string, unknown>>(persisted: Partial<T>) {
    return class TestStore {
      store: T

      constructor(options: { defaults: T }) {
        this.store = { ...options.defaults, ...persisted } as T
      }

      get<K extends keyof T>(key: K): T[K] {
        return this.store[key]
      }

      set<K extends keyof T>(key: K, value: T[K]): void {
        this.store[key] = value
      }

      delete(key: string): void {
        delete this.store[key as keyof T]
      }
    }
  }

  it('revision 5: 정확히 옛 기본값(accept=Ctrl+Alt+→, dismiss=Ctrl+Alt+←)이면 새 기본값으로 옮기고 페이지 이동을 그 자리에 채운다', async () => {
    const OLD_ACCEPT = [{ device: 'keyboard' as const, code: 39, ctrl: true, alt: true, shift: false, meta: false }]
    const OLD_NEXT = [{ device: 'keyboard' as const, code: 40, ctrl: true, alt: true, shift: false, meta: false }]
    const OLD_PREV = [{ device: 'keyboard' as const, code: 38, ctrl: true, alt: true, shift: false, meta: false }]
    const OLD_DISMISS = [{ device: 'keyboard' as const, code: 37, ctrl: true, alt: true, shift: false, meta: false }]

    vi.doMock('electron-store', () => ({
      default: makeTestStore({
        suggestionTuningRevision: 4,
        keyBindings: {
          'suggestion-accept': OLD_ACCEPT,
          'suggestion-next': OLD_NEXT,
          'suggestion-prev': OLD_PREV,
          'suggestion-dismiss': OLD_DISMISS
        }
      })
    }))
    const { configGet, initConfigService, resetInMemoryConfig } = await import(
      '../../../src/main/services/ConfigService'
    )
    await initConfigService()

    const bindings = configGet('keyBindings')
    expect(bindings['suggestion-accept']).toEqual([
      { device: 'keyboard', code: 0x0d, ctrl: true, alt: true, shift: false, meta: false }
    ])
    expect(bindings['suggestion-dismiss']).toEqual([
      { device: 'keyboard', code: 0x08, ctrl: true, alt: true, shift: false, meta: false }
    ])
    // 옮기지 않는 액션은 그대로 남는다.
    expect(bindings['suggestion-next']).toEqual(OLD_NEXT)
    expect(bindings['suggestion-prev']).toEqual(OLD_PREV)
    expect(configGet('suggestionTuningRevision')).toBe(5)

    resetInMemoryConfig()
  })

  it('revision 5: 옛 기본값이 아닌 커스터마이즈는 절대 건드리지 않는다', async () => {
    const CUSTOM_ACCEPT = [{ device: 'keyboard' as const, code: 0x41, ctrl: true, alt: false, shift: false, meta: false }]
    const CUSTOM_DISMISS = [{ device: 'keyboard' as const, code: 0x44, ctrl: true, alt: false, shift: false, meta: false }]

    vi.doMock('electron-store', () => ({
      default: makeTestStore({
        suggestionTuningRevision: 4,
        keyBindings: {
          'suggestion-accept': CUSTOM_ACCEPT,
          'suggestion-dismiss': CUSTOM_DISMISS
        }
      })
    }))
    const { configGet, initConfigService, resetInMemoryConfig } = await import(
      '../../../src/main/services/ConfigService'
    )
    await initConfigService()

    const bindings = configGet('keyBindings')
    expect(bindings['suggestion-accept']).toEqual(CUSTOM_ACCEPT)
    expect(bindings['suggestion-dismiss']).toEqual(CUSTOM_DISMISS)

    resetInMemoryConfig()
  })

})