/**
 * E2E — Individual PO export (PDF + XLSX).
 * Verifies export buttons are present and the export endpoints respond correctly.
 */
import { test, expect, type Page } from "@playwright/test";
import { fillFirstLineItem, fillPoHeader } from "./helpers/login";

const TECH = { email: "tech@pelagia.local", password: "tech1234" };
const MGR  = { email: "manager@pelagia.local", password: "manager1234" };

async function login(page: Page, creds: typeof TECH) {
  await page.goto("/login");
  await page.getByLabel(/email/i).fill(creds.email);
  await page.getByLabel(/password/i).fill(creds.password);
  await page.getByRole("button", { name: /sign in/i }).click();
  await expect(page).not.toHaveURL(/\/login/, { timeout: 20_000 });
}

async function createDraftPo(page: Page, title: string): Promise<string> {
  await page.goto("/po/new");
  await fillPoHeader(page, title);
  await fillFirstLineItem(page, {
    name: "Test item for export",
    quantity: "1",
    unitPrice: "100",
  });
  await page.getByRole("button", { name: /save as draft/i }).click();
  await expect(page).toHaveURL(/\/po\//);
  return page.url();
}

// ── Export buttons visible ────────────────────────────────────────────────────

test("Export PDF button is visible on PO detail page", async ({ page }) => {
  await login(page, TECH);
  await createDraftPo(page, `E2E_EXPORT_BTN_${Date.now()}`);

  await expect(page.getByRole("link", { name: /export pdf/i })).toBeVisible();
});

test("Export XLSX button is visible on PO detail page", async ({ page }) => {
  await login(page, TECH);
  await createDraftPo(page, `E2E_EXPORT_XLSX_BTN_${Date.now()}`);

  await expect(page.getByRole("link", { name: /export xlsx/i })).toBeVisible();
});

// ── Export endpoints respond ──────────────────────────────────────────────────

test("PDF export endpoint returns HTML content", async ({ page }) => {
  await login(page, TECH);
  const poUrl = await createDraftPo(page, `E2E_PDF_EP_${Date.now()}`);
  // Extract PO id from URL: /po/{id}
  const poId = poUrl.split("/po/")[1].replace(/\/$/, "");

  const response = await page.request.get(`/api/po/${poId}/export?format=pdf`);
  expect(response.status()).toBe(200);
  expect(response.headers()["content-type"]).toContain("text/html");
  const body = await response.text();
  expect(body).toContain("PURCHASE ORDER");
  expect(body).toContain("PELAGIA MARINE SERVICES");
});

test("XLSX export endpoint returns a binary spreadsheet", async ({ page }) => {
  await login(page, TECH);
  const poUrl = await createDraftPo(page, `E2E_XLSX_EP_${Date.now()}`);
  const poId = poUrl.split("/po/")[1].replace(/\/$/, "");

  const response = await page.request.get(`/api/po/${poId}/export?format=xlsx`);
  expect(response.status()).toBe(200);
  expect(response.headers()["content-type"]).toContain("spreadsheetml");
  expect(response.headers()["content-disposition"]).toMatch(/\.xlsx/);
});

test("export endpoint returns 401 for unauthenticated requests", async ({ page }) => {
  // Don't log in — use a fresh context
  const response = await page.request.get("/api/po/nonexistent-id/export?format=pdf");
  expect([401, 404]).toContain(response.status());
});

// ── PDF content matches PO data ───────────────────────────────────────────────

test("PDF export contains PO number, company header and T&C section", async ({ page }) => {
  await login(page, TECH);
  const poUrl = await createDraftPo(page, `E2E_PDF_CONTENT_${Date.now()}`);
  const poId = poUrl.split("/po/")[1].replace(/\/$/, "");

  const response = await page.request.get(`/api/po/${poId}/export?format=pdf`);
  const body = await response.text();

  expect(body).toContain("PELAGIA MARINE SERVICES");
  expect(body).toContain("PURCHASE ORDER");
  expect(body).toContain("INSTRUCTIONS TO VENDORS");
  // GST table headers
  expect(body).toContain("Taxable Cost");
  expect(body).toContain("GST%");
  expect(body).toContain("GRAND TOTAL");
  // Signature block
  expect(body).toContain("Authorized Signatory");
});

test("PDF export shows the fixed T&C line 1", async ({ page }) => {
  await login(page, TECH);
  const poUrl = await createDraftPo(page, `E2E_PDF_TC_${Date.now()}`);
  const poId = poUrl.split("/po/")[1].replace(/\/$/, "");

  const response = await page.request.get(`/api/po/${poId}/export?format=pdf`);
  const body = await response.text();
  expect(body).toMatch(/please quote this purchase order/i);
});

// ── Manager can also export ───────────────────────────────────────────────────

test("manager can see and use the Export PDF button on any PO detail", async ({ page }) => {
  await login(page, MGR);
  await page.goto("/approvals");
  // Click first PO in the queue if available
  const firstPoLink = page.locator("a[href^='/po/']").first();
  if (await firstPoLink.count() > 0) {
    await firstPoLink.click();
    await expect(page.getByRole("link", { name: /export pdf/i })).toBeVisible();
  }
});