import { describe, it, expect, vi } from 'vitest'
import { ConfigManager } from '@services/config/config-manager'
import type { SettingsData } from '@types/settings.types'

describe('ConfigManager - deep merge utilities', () => {
  it('should deep merge objects, updating only specified fields', async () => {
    const manager = ConfigManager.getInstance()
    await manager.initialize()

    // Setup initial state
    const initial: SettingsData = {
      erp: { url: 'http://old.com', username: 'user1', password: 'pass1', headless: true, ignoreHttpsErrors: true, autoCloseBrowser: true },
      database: { dbType: 'mysql', server: '', mysqlHost: 'localhost', mysqlPort: 3306, database: 'db', username: 'user', password: '' },
      paths: { dataDir: '/data', defaultOutput: 'out.xlsx', validationOutput: 'validation.xlsx' },
      extraction: { batchSize: 100, verbose: true, autoConvert: true, mergeBatches: true, enableDbPersistence: true },
      validation: { dataSource: 'database_full', batchSize: 2000, matchMode: 'substring', enableCrud: false, defaultManager: '' },
      ui: { fontFamily: 'Arial', fontSize: 12, productionIdInputWidth: 20 },
      execution: { dryRun: false }
    }

    // Load initial settings
    await manager.saveAllSettings(initial)

    // Partial update
    const partial = {
      erp: { url: 'http://new.com' }
    }

    const result = await manager.savePartialSettings(partial)

    expect(result.success).toBe(true)

    const current = manager.getAllSettings()

    // Updated field
    expect(current.erp.url).toBe('http://new.com')

    // Preserved fields
    expect(current.erp.username).toBe('user1')
    expect(current.database.dbType).toBe('mysql')
    expect(current.paths.dataDir).toBe('/data')
  })
})