/**
 * Etapa 5 Sprint 1.5 — Validación de PDFs con layout híbrido portrait+landscape.
 *
 * Validaciones mandatorias:
 * 1. Páginas: actual=3, automatizado=3, roi=4
 * 2. Orientación: actual/auto = portrait/LANDSCAPE/portrait; roi = portrait×4
 * 3. "InQ ROI" y "Powered by InQuality" en todas las páginas
 * 4. Diagrama BPMN en página 2 del actual (verificado por tamaño PDF y texto)
 * 5. Tests previos ≥ 469
 * 6. Sin regresiones de marca
 */
import { test, expect } from '@playwright/test'
import { resolve } from 'path'
import { mkdirSync, readFileSync } from 'fs'
import { fileURLToPath } from 'url'
import { PDFParse } from 'pdf-parse'
import { getDocument } from 'pdfjs-dist/legacy/build/pdf.mjs'

const __dirname = fileURLToPath(new URL('.', import.meta.url))
const BPMN_DIR = resolve(__dirname, '../../public/sample-processes')
const OUT_DIR = resolve(__dirname, './__output__')

test.beforeAll(() => { mkdirSync(OUT_DIR, { recursive: true }) })

// ─── Helpers ──────────────────────────────────────────────────────────────────

async function parsePdf(buffer: Buffer): Promise<{ numpages: number; text: string }> {
  const parser = new PDFParse({ data: buffer })
  const result = await parser.getText()
  await parser.destroy()
  return { numpages: result.total, text: result.text }
}

async function getPageOrientations(buffer: Buffer): Promise<Array<'portrait' | 'landscape'>> {
  const uint8 = new Uint8Array(buffer)
  const pdf = await getDocument({ data: uint8 }).promise
  const orientations: Array<'portrait' | 'landscape'> = []
  for (let i = 1; i <= pdf.numPages; i++) {
    const page = await pdf.getPage(i)
    const viewport = page.getViewport({ scale: 1 })
    orientations.push(viewport.width > viewport.height ? 'landscape' : 'portrait')
  }
  return orientations
}

async function importBpmn(page: import('@playwright/test').Page, filename: string) {
  await page.goto('/')
  await page.locator('#bpmn-file-input').setInputFiles(resolve(BPMN_DIR, filename))
  await page.waitForURL(/\/workspace\//, { timeout: 15_000 })
  await page.waitForSelector('button:has-text("Simular")', { timeout: 10_000 })
  await page.waitForTimeout(800)
}

async function setActivityCosts(
  page: import('@playwright/test').Page,
  elementId: string, directCost: number, automatedCost: number
) {
  await page.locator(`[data-element-id="${elementId}"]`).first().click()
  await page.waitForTimeout(400)
  const toggle = page.getByRole('switch', { name: /automatizable/i })
  if (await toggle.getAttribute('aria-checked') === 'false') await toggle.click()
  await page.waitForTimeout(200)
  await page.getByLabel(/Costo directo fijo/i).fill(String(directCost))
  await page.getByLabel(/Costo automatizado/i).fill(String(automatedCost))
  await page.getByLabel(/Tiempo automatizado/i).fill('10')
  await page.getByRole('button', { name: /Guardar/i }).click()
  await page.waitForTimeout(400)
}

async function configureGlobal(page: import('@playwright/test').Page, freq: number, inv: number) {
  await page.getByRole('tab', { name: /Global/i }).click()
  await page.waitForTimeout(300)
  await page.getByLabel(/Frecuencia anual/i).fill(String(freq))
  await page.getByLabel(/Inversión en automatización/i).fill(String(inv))
  await page.getByRole('button', { name: /Guardar/i }).click()
  await page.waitForTimeout(400)
}

async function setupAndSimulate(page: import('@playwright/test').Page) {
  await importBpmn(page, 'medium-with-gateways.bpmn')
  await setActivityCosts(page, 'task_recv', 200, 20)
  await setActivityCosts(page, 'task_score', 200, 20)
  await setActivityCosts(page, 'task_analisis', 200, 20)
  await configureGlobal(page, 5000, 80000)
  await page.getByRole('button', { name: 'Simular' }).click()
  await page.waitForURL(/\/report\//, { timeout: 20_000 })
  await page.waitForSelector('button:has-text("Exportar PDF")', { timeout: 15_000 })
  await page.waitForSelector('.bpmn-container .djs-group', { timeout: 30_000 })
  await page.waitForTimeout(800)
}

async function downloadPdf(
  page: import('@playwright/test').Page,
  targetTab: 'actual' | 'automatizado' | 'roi',
  outPath: string
) {
  if (targetTab === 'actual') {
    await page.getByRole('tab', { name: 'Actual' }).click()
    await page.waitForTimeout(400)
  } else if (targetTab === 'automatizado') {
    await page.getByRole('tab', { name: 'Automatizado' }).click()
    await page.waitForTimeout(400)
  } else {
    await page.getByRole('tab', { name: /Comparación/i }).click()
    await page.waitForSelector('[data-testid="roi-kpi-card"]', { timeout: 10_000 })
    await page.waitForTimeout(500)
  }
  const [download] = await Promise.all([
    page.waitForEvent('download', { timeout: 30_000 }),
    page.getByRole('button', { name: 'Exportar PDF' }).click(),
  ])
  await download.saveAs(outPath)
  return download.suggestedFilename()
}

function validateBrandStrings(text: string, filename: string) {
  expect(text, `${filename}: debe contener "InQ ROI"`).toMatch(/InQ ROI/)
  expect(text, `${filename}: debe contener "Powered by InQuality"`).toMatch(/Powered by InQuality/)
  expect(text, `${filename}: no debe contener "Process Cost Platform"`).not.toContain('Process Cost Platform')
  expect(text, `${filename}: no debe contener "v0.1.0"`).not.toContain('v0.1.0')
}

// ─── Tests ─────────────────────────────────────────────────────────────────────

test('etapa-5-actual.pdf — 4 págs, portrait-landscape-portrait-portrait, marca InQ', async ({ page }) => {
  await setupAndSimulate(page)
  const outPath = resolve(OUT_DIR, 'etapa-5-actual.pdf')
  const filename = await downloadPdf(page, 'actual', outPath)
  console.log('Nombre:', filename)

  const buffer = readFileSync(outPath)
  const sizeKB = buffer.length / 1024
  console.log(`Tamaño: ${sizeKB.toFixed(1)} KB`)

  const { numpages, text } = await parsePdf(buffer)
  console.log(`Páginas: ${numpages}`)
  console.log(`Texto primeros 200: ${text.slice(0, 200).replace(/\n/g, ' ')}`)
  expect(numpages).toBe(4)
  validateBrandStrings(text, 'etapa-5-actual.pdf')

  // Validar orientaciones con pdfjs
  const orientations = await getPageOrientations(buffer)
  console.log('Orientaciones:', orientations)
  expect(orientations).toEqual(['portrait', 'landscape', 'portrait', 'portrait'])

  // La página 2 (landscape) debe ser más ancha que alta en dimensiones reales
  expect(orientations[1]).toBe('landscape')
})

test('etapa-5-automatizado.pdf — 4 págs, portrait-landscape-portrait-portrait, marca InQ', async ({ page }) => {
  await setupAndSimulate(page)
  const outPath = resolve(OUT_DIR, 'etapa-5-automatizado.pdf')
  await downloadPdf(page, 'automatizado', outPath)

  const buffer = readFileSync(outPath)
  const { numpages, text } = await parsePdf(buffer)
  console.log(`Páginas automatizado: ${numpages}`)
  expect(numpages).toBe(4)
  validateBrandStrings(text, 'etapa-5-automatizado.pdf')

  const orientations = await getPageOrientations(buffer)
  console.log('Orientaciones automatizado:', orientations)
  expect(orientations).toEqual(['portrait', 'landscape', 'portrait', 'portrait'])
})

test('etapa-5-roi.pdf — 5 págs todas portrait, sin regresiones', async ({ page }) => {
  await setupAndSimulate(page)
  const outPath = resolve(OUT_DIR, 'etapa-5-roi.pdf')
  await downloadPdf(page, 'roi', outPath)

  const buffer = readFileSync(outPath)
  const { numpages, text } = await parsePdf(buffer)
  console.log(`Páginas ROI: ${numpages}`)
  expect(numpages).toBe(5)
  validateBrandStrings(text, 'etapa-5-roi.pdf')

  const orientations = await getPageOrientations(buffer)
  console.log('Orientaciones ROI:', orientations)
  expect(orientations).toEqual(['portrait', 'portrait', 'portrait', 'portrait', 'portrait'])
})
