import { describe, it, expect } from 'vitest'
import { migrateSettingsKeys, RENAMED_SETTINGS_KEYS } from '../src/main/settingsMigration'
import { DEFAULT_SETTINGS } from '@shared/ipc'

describe('migrateSettingsKeys (CC1)', () => {
  it('moves every legacy key to its new name', () => {
    const legacy = {
      customCommandEnabled: true,
      downloadArchive: true,
      clipboardWatch: false,
      sidebarCollapsed: true,
      hardwareAcceleration: true,
      videoDir: 'D:\\Media\\Video',
      audioDir: 'D:\\Media\\Audio'
    }
    const out = migrateSettingsKeys(legacy)
    expect(out).toEqual({
      enableCustomCommands: true,
      useDownloadArchive: true,
      watchClipboard: false,
      isSidebarCollapsed: true,
      useHardwareAcceleration: true,
      videoFolder: 'D:\\Media\\Video',
      audioFolder: 'D:\\Media\\Audio'
    })
  })

  it('a value already present under the new name wins', () => {
    const out = migrateSettingsKeys({ videoDir: 'old', videoFolder: 'new' })
    expect(out).toEqual({ videoFolder: 'new' })
  })

  it('passes non-renamed keys through untouched and does not mutate the input', () => {
    const input = { theme: 'dark', maxConcurrent: 3, videoDir: 'X' }
    const out = migrateSettingsKeys(input)
    expect(out.theme).toBe('dark')
    expect(out.maxConcurrent).toBe(3)
    expect(input.videoDir).toBe('X') // input untouched
    expect('videoDir' in out).toBe(false)
  })

  it('restores a full pre-rename backup fixture into the current Settings shape', () => {
    // A settings object exactly as an older AeroFetch would have exported it:
    // current defaults, but with every renamed key under its OLD name.
    const legacyBackup: Record<string, unknown> = { ...DEFAULT_SETTINGS }
    for (const [oldKey, newKey] of RENAMED_SETTINGS_KEYS) {
      legacyBackup[oldKey] = legacyBackup[newKey]
      delete legacyBackup[newKey]
    }
    legacyBackup.customCommandEnabled = true
    legacyBackup.videoDir = 'E:\\Downloads'

    const out = migrateSettingsKeys(legacyBackup)
    // Every current key present, no legacy key left behind.
    for (const [oldKey, newKey] of RENAMED_SETTINGS_KEYS) {
      expect(oldKey in out).toBe(false)
      expect(newKey in out).toBe(true)
    }
    expect(out.enableCustomCommands).toBe(true)
    expect(out.videoFolder).toBe('E:\\Downloads')
    expect(Object.keys(out).sort()).toEqual(Object.keys(DEFAULT_SETTINGS).sort())
  })

  it('every new name follows the boolean/folder naming convention', () => {
    for (const [, newKey] of RENAMED_SETTINGS_KEYS) {
      expect(newKey).toMatch(/^(is|has|should|use|enable|watch)[A-Z]|Folder$/)
    }
  })
})