import { stringify, split, merge, getPagesFolder } from './websiteDataSerialization'
import { expect, it, describe } from '@jest/globals'
import { WebsiteData, EMPTY_WEBSITE } from '../../types'
import { WEBSITE_DATA_FILE, WEBSITE_PAGES_FOLDER } from '../../constants'

describe('websiteDataSerialization', () => {
  describe('stringify', () => {
    it('should format JSON with sorted keys', () => {
      const data = { z: 1, a: 2, m: { z: 3, a: 4 } }
      const result = stringify(data)
      expect(result).toBe(`{
  "a": 2,
  "m": {
    "a": 4,
    "z": 3
  },
  "z": 1
}`)
    })
  })

  describe('split', () => {
    it('should split website data into separate files', () => {
      const websiteData: WebsiteData = {
        ...EMPTY_WEBSITE,
        pages: [
          { id: 'page1', getName: () => 'Home' } as any,
          { id: 'page2', getName: () => 'About' } as any
        ]
      }

      const files = split(websiteData)

      expect(files).toHaveLength(3)
      expect(files[0].path).toBe('pages/home-page1.json')
      expect(files[1].path).toBe('pages/about-page2.json')
      expect(files[2].path).toBe(WEBSITE_DATA_FILE)

      const mainFile = JSON.parse(files[2].content)
      expect(mainFile.pages[0].isFile).toBe(true)
    })
  })

  describe('merge', () => {
    it('should handle legacy format', async () => {
      const legacyContent = `{
        "settings": {},
        "pages": [{ "id": "page1" }]
      }`

      const pageLoader = async () => { throw new Error('Should not be called') }
      const result = await merge(legacyContent, pageLoader)

      expect(result.pages).toHaveLength(1)
      expect(result.pages[0].id).toBe('page1')
    })
  })

  describe('getPagesFolder', () => {
    it('should return default folder when pagesFolder is not set', () => {
      const websiteData = { ...EMPTY_WEBSITE }
      const result = getPagesFolder(websiteData)
      expect(result).toBe(WEBSITE_PAGES_FOLDER)
    })

    it('should return custom folder when pagesFolder is set', () => {
      const websiteData = { ...EMPTY_WEBSITE, pagesFolder: 'custom-pages' }
      const result = getPagesFolder(websiteData)
      expect(result).toBe('custom-pages')
    })
  })

  describe('split with custom pages folder', () => {
    it('should use custom pages folder in file paths', () => {
      const websiteData = {
        ...EMPTY_WEBSITE,
        pagesFolder: 'custom-pages',
        pages: [{
          id: 'page1',
          getName: () => 'Home'
        } as any]
      }

      const files = split(websiteData)
      const pageFile = files.find(f => f.path.includes('page1'))

      expect(pageFile).toBeDefined()
      expect(pageFile!.path).toMatch(/^custom-pages\/.*\.json$/)
    })
  })
})