/**
 * End-to-End Tests for Convert Tool
 *
 * All backend API calls are mocked via page.route() — no real backend required.
 * The Vite dev server must be running (handled by playwright.config.ts webServer).
 */

import { test, expect, type Page } from '@playwright/test';
import path from 'path';

const FIXTURES_DIR = path.join(__dirname, '../test-fixtures');
const SAMPLE_PDF = path.join(FIXTURES_DIR, 'sample.pdf');

// ---------------------------------------------------------------------------
// Endpoint availability map — all conversion endpoints enabled
// ---------------------------------------------------------------------------
const MOCK_ENDPOINTS_AVAILABILITY = Object.fromEntries(
  [
    'pdf-to-img', 'img-to-pdf', 'pdf-to-word', 'file-to-pdf', 'pdf-to-text',
    'pdf-to-html', 'pdf-to-xml', 'pdf-to-csv', 'pdf-to-xlsx', 'pdf-to-pdfa',
    'pdf-to-pdfx', 'pdf-to-presentation', 'pdf-to-markdown', 'pdf-to-cbz',
    'pdf-to-cbr', 'pdf-to-epub', 'html-to-pdf', 'svg-to-pdf', 'markdown-to-pdf',
    'eml-to-pdf', 'cbz-to-pdf', 'cbr-to-pdf',
  ].map((k) => [k, { enabled: true }])
);

// ---------------------------------------------------------------------------
// Helper: mock all standard app APIs needed to load the main UI
// ---------------------------------------------------------------------------
async function mockAppApis(page: Page) {
  // Backend probe — must return UP so Landing shows app in anonymous mode
  await page.route('**/api/v1/info/status', (route) =>
    route.fulfill({ json: { status: 'UP' } })
  );

  // App config — enableLogin:false puts the app in anonymous mode
  await page.route('**/api/v1/config/app-config', (route) =>
    route.fulfill({
      json: { enableLogin: false, languages: ['en-GB'], defaultLocale: 'en-GB' },
    })
  );

  // Auth — fallback if anything calls auth/me
  await page.route('**/api/v1/auth/me', (route) =>
    route.fulfill({
      json: { id: 1, username: 'testuser', email: 'test@example.com', roles: ['ROLE_USER'] },
    })
  );

  // Endpoint availability — queried by ConvertSettings
  await page.route('**/api/v1/config/endpoints-availability', (route) =>
    route.fulfill({ json: MOCK_ENDPOINTS_AVAILABILITY })
  );

  // Single-endpoint check — queried by Convert.tsx for the execute button
  await page.route('**/api/v1/config/endpoint-enabled*', (route) =>
    route.fulfill({ json: true })
  );

  // Group-enabled check
  await page.route('**/api/v1/config/group-enabled*', (route) =>
    route.fulfill({ json: true })
  );

  // Footer info — non-critical
  await page.route('**/api/v1/ui-data/footer-info', (route) =>
    route.fulfill({ json: {} })
  );

  // Proprietary endpoints — silence proxy errors in the Vite dev server
  await page.route('**/api/v1/proprietary/**', (route) =>
    route.fulfill({ json: {} })
  );
}

// ---------------------------------------------------------------------------
// Helper: upload a file through the Files modal
// Uses the HiddenFileInput (data-testid="file-input") which has the correct
// onChange handler. Waits for the modal to auto-close after upload.
// ---------------------------------------------------------------------------
async function uploadFile(page: Page, filePath: string) {
  await page.getByTestId('files-button').click();
  await page.waitForSelector('.mantine-Modal-overlay', { state: 'visible', timeout: 5000 });
  await page.locator('[data-testid="file-input"]').setInputFiles(filePath);
  // Modal auto-closes after file is selected
  await page.waitForSelector('.mantine-Modal-overlay', { state: 'hidden', timeout: 10000 });
}

// ---------------------------------------------------------------------------
// Helper: navigate to the Convert tool panel
// Tools use data-tour="tool-button-{key}" anchors in the ToolPanel.
// After clicking, the URL changes to /convert and the settings appear.
// ---------------------------------------------------------------------------
async function navigateToConvert(page: Page) {
  await page.locator('[data-tour="tool-button-convert"]').click();
  await page.waitForSelector('[data-testid="convert-from-dropdown"]', { timeout: 5000 });
}

// ---------------------------------------------------------------------------
// Helper: select the TO format in the convert dropdown
// The FROM format is auto-detected from the uploaded file (e.g. PDF → "Document (PDF)").
// Opening the TO dropdown renders format-option-{value} buttons in a portal.
// ---------------------------------------------------------------------------
async function selectToFormat(page: Page, toValue: string) {
  await page.getByTestId('convert-to-dropdown').click();
  await page.getByTestId(`format-option-${toValue}`).click();
}

// ---------------------------------------------------------------------------
// Tests
// ---------------------------------------------------------------------------
test.describe('Convert Tool', () => {
  test.beforeEach(async ({ page }) => {
    await mockAppApis(page);
    await page.goto('/?bypassOnboarding=true');
    await page.waitForSelector('[data-testid="files-button"]', { timeout: 10000 });
  });

  test('convert button is disabled before a TO format is selected', async ({ page }) => {
    await uploadFile(page, SAMPLE_PDF);
    await navigateToConvert(page);

    // FROM is auto-detected as PDF; TO not selected → button visible but disabled
    const convertBtn = page.getByTestId('convert-button');
    await expect(convertBtn).toBeVisible({ timeout: 3000 });
    await expect(convertBtn).toBeDisabled();
  });

  test('successful PDF to PNG conversion shows download option', async ({ page }) => {
    // Minimal valid PNG header (8 bytes signature + padding)
    const fakePng = Buffer.from([
      0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a,
      ...Array(504).fill(0),
    ]);

    await page.route('**/api/v1/convert/pdf/img', (route) =>
      route.fulfill({
        status: 200,
        contentType: 'image/png',
        headers: { 'Content-Disposition': 'attachment; filename="sample.png"' },
        body: fakePng,
      })
    );

    await uploadFile(page, SAMPLE_PDF);
    await navigateToConvert(page);
    await selectToFormat(page, 'png');
    await page.getByTestId('convert-button').click();

    await expect(page.getByTestId('download-result-button')).toBeVisible({ timeout: 10000 });
  });

  test('conversion API error shows error notification', async ({ page }) => {
    await page.route('**/api/v1/convert/pdf/img', (route) =>
      route.fulfill({
        status: 500,
        contentType: 'text/plain',
        body: 'Internal server error: conversion failed',
      })
    );

    await uploadFile(page, SAMPLE_PDF);
    await navigateToConvert(page);
    await selectToFormat(page, 'png');
    await page.getByTestId('convert-button').click();

    // Mantine Notification renders as role="alert"
    await expect(page.getByRole('alert').first()).toBeVisible({ timeout: 5000 });
  });

  test('convert button becomes enabled after selecting a valid TO format', async ({ page }) => {
    await uploadFile(page, SAMPLE_PDF);
    await navigateToConvert(page);

    // Before selecting TO format — button visible but disabled
    const convertBtn = page.getByTestId('convert-button');
    await expect(convertBtn).toBeVisible({ timeout: 3000 });
    await expect(convertBtn).toBeDisabled();

    // After selecting PNG as TO format — button enabled
    await selectToFormat(page, 'png');
    await expect(convertBtn).toBeEnabled({ timeout: 3000 });
  });
});