/**
 * AD-2.5-T1 — typography regression lock (RFC-WS-PRIMEVUE-PLAN-2-5).
 *
 * Reads the font-config sources directly (file-content inspection) rather
 * than relying on getComputedStyle in jsdom — jsdom does not cascade
 * from imported stylesheets, so a runtime check would always pass.
 *
 * Two files are inspected:
 *  1. apps/app/src/assets/styles/tailwind.css — Tailwind v4 @theme
 *     --font-sans token + the cascade-level html/body font-family +
 *     --crewli-font-family CSS variable.
 *  2. apps/app/src/@core/scss/template/libs/vuetify/_variables.scss —
 *     the vendored Vuexy SCSS variable $font-family-custom that feeds
 *     Vuetify's $body-font-family on legacy surfaces.
 *
 * If either file is moved, update the path constants below.
 */

import { existsSync, readFileSync, readdirSync } from 'node:fs'
import { resolve } from 'node:path'
import { describe, expect, it } from 'vitest'

const TAILWIND_CSS_PATH = resolve(
  __dirname,
  '../../../src/assets/styles/tailwind.css',
)

const VUEXY_VARIABLES_PATH = resolve(
  __dirname,
  '../../../src/@core/scss/template/libs/vuetify/_variables.scss',
)

const PLUGINS_DIR = resolve(__dirname, '../../../src/plugins')

const tailwindCss = readFileSync(TAILWIND_CSS_PATH, 'utf-8')
const vuexyVariables = readFileSync(VUEXY_VARIABLES_PATH, 'utf-8')

/**
 * All TypeScript plugin files under `apps/app/src/plugins/`, flat-only (the
 * `registerPlugins` glob also picks up `plugins/*\/index.ts`, but those
 * sub-plugins are folder-namespaced and unlikely to load fonts — flat
 * coverage matches where webfontloader.ts lived and where any future
 * font-loading regression would most likely surface).
 */
const pluginFiles: Array<{ path: string; content: string }> = existsSync(PLUGINS_DIR)
  ? readdirSync(PLUGINS_DIR)
    .filter(f => f.endsWith('.ts'))
    .map(f => ({ path: f, content: readFileSync(resolve(PLUGINS_DIR, f), 'utf-8') }))
  : []

/**
 * Pulls every `font-family: …;` or `--<name>font<name>: …;` declaration
 * from a CSS source. Skips `var(...)` indirections — those are pointers
 * to other declarations that are themselves asserted directly.
 */
function fontDeclarations(css: string): string[] {
  // `[^;]+` already accepts leading whitespace; explicit `\s*` between
  // the colon and the value would overlap with it and trip
  // regexp/no-super-linear-backtracking. We `.trim()` later.
  const matches = css.match(/(?:font-family|--[\w-]*font[\w-]*):([^;]+);/gi)

  return (matches ?? []).filter(decl => !/\bvar\(/.test(decl))
}

function firstFamily(decl: string): string {
  return decl
    .split(':')[1]
    .split(',')[0]
    .trim()
    .replace(/['"]/g, '')
}

describe('Typography regression lock (AD-2.5-T1)', () => {
  it('tailwind.css declares Inter as the first font in every direct stack', () => {
    const decls = fontDeclarations(tailwindCss)

    expect(decls.length).toBeGreaterThan(0)

    for (const decl of decls)
      expect(firstFamily(decl).toLowerCase()).toBe('inter')
  })

  it('Vuexy $font-family-custom declares Inter as the first family', () => {
    // SCSS variable shape — `$font-family-custom: "Inter", …;` (spans
    // two lines in the source; the regex eats the value up to the `;`).
    const match = vuexyVariables.match(

      // Same backtracking-avoidance as fontDeclarations above: drop \s*.
      /\$font-family-custom:([^;]+);/i,
    )

    expect(match).not.toBeNull()

    const family = match![1]
      .split(',')[0]
      .trim()
      .replace(/['"]/g, '')

    expect(family.toLowerCase()).toBe('inter')
  })

  it('no Public Sans reference survives in either font-config file', () => {
    expect(tailwindCss).not.toMatch(/Public Sans/i)
    expect(tailwindCss).not.toMatch(/public-sans/i)
    expect(vuexyVariables).not.toMatch(/Public Sans/i)
    expect(vuexyVariables).not.toMatch(/public-sans/i)
  })
})

/**
 * AD-2.5-T1 completion (P2-followup): the JS font-loading path.
 *
 * P2 inspected CSS only and missed `src/plugins/webfontloader.ts`, which
 * loaded Public Sans from the Google Fonts CDN via WebFont.load(). This
 * block locks the JS path so the same drift cannot recur: no plugin may
 * load fonts via webfontloader, the Google Fonts CDN, or reference
 * Public Sans by any spelling.
 */
describe('Typography regression lock — JS font-loading path (AD-2.5-T1 completion)', () => {
  it('no plugin loads fonts via webfontloader / Google Fonts CDN / Public Sans', () => {
    for (const { path, content } of pluginFiles) {
      expect(content, `${path} references webfontloader`).not.toMatch(/webfontloader/i)
      expect(content, `${path} calls WebFont.load`).not.toMatch(/WebFont\.load/)
      expect(content, `${path} references Public Sans`).not.toMatch(/Public.?Sans/i)
      expect(content, `${path} references fonts.googleapis.com`).not.toMatch(/fonts\.googleapis\.com/)
    }
  })

  it('webfontloader.ts plugin no longer exists', () => {
    expect(existsSync(resolve(PLUGINS_DIR, 'webfontloader.ts'))).toBe(false)
  })
})