import { describe, expect, it } from 'vitest'
import { DEFAULT_BASE, readBase, runtime } from '../../src/app/runtime'

function docWith(content: string | null): Document {
  const doc = document.implementation.createHTMLDocument('test')
  if (content !== null) {
    const meta = doc.createElement('meta')
    meta.setAttribute('name', 'summer-admin-base')
    meta.setAttribute('content', content)
    doc.head.appendChild(meta)
  }
  return doc
}

describe('runtime base', () => {
  it('derives the router base and the API base from the served meta', () => {
    expect(runtime.base).toBe('/admin-test')
    expect(runtime.api).toBe('/admin-test/api/v1')
  })

  it('reads a custom prefix and trims trailing slashes and whitespace', () => {
    expect(readBase(docWith('/acp'))).toBe('/acp')
    expect(readBase(docWith(' /acp/panel// '))).toBe('/acp/panel')
  })

  it.each([
    ['a missing meta', null],
    ['an empty value', ''],
    ['the unreplaced build token', '__SUMMER_ADMIN_BASE__'],
    ['a relative path', 'backend'],
    ['an absolute URL', 'https://evil.example/backend'],
    ['the root alone', '/'],
    ['slashes only', '///'],
  ])('falls back to the default for %s', (_label, content) => {
    expect(readBase(docWith(content))).toBe(DEFAULT_BASE)
  })

  it('uses /backend as the default', () => {
    expect(DEFAULT_BASE).toBe('/backend')
  })
})