import { expect, test, type Page } from "@playwright/test";
import type { AutomationRun } from "../src/api/types";

const apiErrorBody = JSON.stringify({
  error: { code: "TEST_UNAVAILABLE", message: "Injected test failure", correlation_id: "test-correlation" },
});

async function loginAsManager(page: Page) {
  await page.goto("/login");
  await page.getByRole("button", { name: "Verken als Operationsmanager" }).click();
  await expect(page).toHaveURL(/\/dashboard$/);
}

async function failFirstManifestRequest(page: Page) {
  let requestCount = 0;
  await page.route("**/api/v1/demo/manifest", async (route) => {
    requestCount += 1;
    if (requestCount === 1) {
      await route.fulfill({ status: 503, contentType: "application/json", body: apiErrorBody });
      return;
    }
    await route.continue();
  });
}

test("session validation does not wait for a stalled system-status request", async ({ page }) => {
  let releaseStatus = () => undefined;
  const statusGate = new Promise<void>((resolve) => {
    releaseStatus = resolve;
  });
  let sessionRequested = false;

  await page.route("**/api/v1/system/status", async (route) => {
    await statusGate;
    await route.fulfill({ status: 503, contentType: "application/json", body: apiErrorBody });
  });
  await page.route("**/api/v1/auth/session", async (route) => {
    sessionRequested = true;
    await route.fulfill({ status: 401, contentType: "application/json", body: apiErrorBody });
  });

  try {
    await page.goto("/login");
    await expect(page.getByRole("button", { name: "Verken als Operationsmanager" })).toBeEnabled({
      timeout: 2_000,
    });
    expect(sessionRequested).toBe(true);
  } finally {
    releaseStatus();
  }
});

test("guided demo stays gated while its manifest loads, then exposes an explicit retry", async ({ page }) => {
  let releaseManifest = () => undefined;
  const manifestGate = new Promise<void>((resolve) => {
    releaseManifest = resolve;
  });
  let markManifestRequested = () => undefined;
  const manifestRequested = new Promise<void>((resolve) => {
    markManifestRequested = resolve;
  });
  let manifestAttempts = 0;

  await page.route("**/api/v1/demo/manifest", async (route) => {
    manifestAttempts += 1;
    if (manifestAttempts === 1) {
      markManifestRequested();
      await manifestGate;
      await route.fulfill({ status: 503, contentType: "application/json", body: apiErrorBody });
      return;
    }
    await route.continue();
  });

  try {
    await page.goto("/login");
    await manifestRequested;
    const guidedDemo = page.getByRole("button", { name: "Start begeleide demo" });
    await expect(guidedDemo).toBeDisabled();
    await expect(page.getByText("Begeleide demo voorbereiden…")).toBeVisible();

    releaseManifest();
    await expect(page.getByText("De begeleide demo-informatie kon niet geladen worden.")).toBeVisible();
    await expect(guidedDemo).toBeDisabled();
    await page.getByRole("button", { name: "Demo-informatie opnieuw laden" }).click();

    await expect(guidedDemo).toBeEnabled();
    expect(manifestAttempts).toBeGreaterThanOrEqual(2);
  } finally {
    releaseManifest();
  }
});

test("guided demo does not continue until the manifest reports it ready", async ({ page }) => {
  let returnNotReady = true;
  await page.route("**/api/v1/demo/manifest", async (route) => {
    if (!returnNotReady) {
      await route.continue();
      return;
    }
    const response = await route.fetch();
    const manifest = await response.json() as Record<string, unknown>;
    await route.fulfill({ response, json: { ...manifest, guide_available: false } });
  });

  await page.goto("/login");
  const guidedDemo = page.getByRole("button", { name: "Start begeleide demo" });
  await expect(guidedDemo).toBeDisabled();
  await expect(page.getByText("De begeleide demo is momenteel niet klaar om te starten.")).toBeVisible();
  await guidedDemo.evaluate((button) => {
    button.removeAttribute("disabled");
    (button as HTMLButtonElement).click();
  });
  await expect(page).toHaveURL(/\/login$/);

  returnNotReady = false;
  await page.getByRole("button", { name: "Demo-informatie opnieuw laden" }).click();
  await expect(guidedDemo).toBeEnabled();
});

test("blocked sessionStorage cannot break login or logout", async ({ page }) => {
  await page.addInitScript(() => {
    Object.defineProperties(Storage.prototype, {
      setItem: {
        configurable: true,
        value: () => {
          throw new DOMException("Storage is blocked", "SecurityError");
        },
      },
      removeItem: {
        configurable: true,
        value: () => {
          throw new DOMException("Storage is blocked", "SecurityError");
        },
      },
    });
  });

  await loginAsManager(page);
  await expect(page.getByText("Amelie De Ridder").first()).toBeVisible();

  await page.locator(".operator-menu > summary").click();
  await page.getByRole("button", { name: "Wissel van rol" }).click();
  await expect(page).toHaveURL(/\/login$/);
});

test("scenario manifest failure is visible and retryable", async ({ page }) => {
  await failFirstManifestRequest(page);
  await loginAsManager(page);

  await page.locator('a[href="/scenarios"]').first().click();
  await expect(page).toHaveURL(/\/scenarios$/);
  await expect(page.getByText("De demonstratiescenario's konden niet geladen worden.")).toBeVisible();

  await page.getByRole("button", { name: "Opnieuw proberen" }).click();
  await expect(page.locator(".scenario-card")).toHaveCount(5);
});

test("engineering manifest failure is visible and retryable", async ({ page }) => {
  await failFirstManifestRequest(page);
  await loginAsManager(page);

  await page.locator('a[href="/about"]').first().click();
  await expect(page).toHaveURL(/\/about$/);
  await expect(page.getByText("De demo-informatie kon niet geladen worden.")).toBeVisible();

  await page.getByRole("button", { name: "Opnieuw proberen" }).click();
  await expect(page.getByRole("heading", { name: "Controle, betrouwbaarheid en uitlegbaarheid" })).toBeVisible();
});

test("the latest automation filter wins when an older response completes last", async ({ page }) => {
  test.setTimeout(45_000);
  let releaseOldResponse = () => undefined;
  const oldResponseGate = new Promise<void>((resolve) => {
    releaseOldResponse = resolve;
  });
  let markOldRequestStarted = () => undefined;
  const oldRequestStarted = new Promise<void>((resolve) => {
    markOldRequestStarted = resolve;
  });
  let markOldResponseAttempted = () => undefined;
  const oldResponseAttempted = new Promise<void>((resolve) => {
    markOldResponseAttempted = resolve;
  });

  const run = (status: "failed" | "pending", aggregateRef: string): AutomationRun => ({
    event_id: status === "failed"
      ? "11111111-1111-4111-8111-111111111111"
      : "22222222-2222-4222-8222-222222222222",
    event_type: "vehicle.returned.v1",
    aggregate_ref: aggregateRef,
    status,
    attempts: status === "failed" ? 2 : 0,
    last_error: null,
    last_error_code: null,
    is_demo_scenario: false,
    occurred_at: "2026-08-23T10:00:00Z",
  });

  await page.route(/\/api\/v1\/workflows(?:\?.*)?$/, async (route) => {
    const requestedStatus = new URL(route.request().url()).searchParams.get("status");
    if (requestedStatus === "failed") {
      markOldRequestStarted();
      await oldResponseGate;
      try {
        await route.fulfill({
          status: 200,
          contentType: "application/json",
          body: JSON.stringify([run("failed", "BK-RACE-OLD")]),
        });
      } catch {
        // Chromium cancels the superseded fetch. The delayed route can therefore be
        // closed before Playwright gets to fulfil it; either outcome proves the same
        // contract as long as it cannot overwrite the newer response.
      } finally {
        markOldResponseAttempted();
      }
      return;
    }
    if (requestedStatus === "pending") {
      await route.fulfill({
        status: 200,
        contentType: "application/json",
        body: JSON.stringify([run("pending", "BK-RACE-NEW")]),
      });
      return;
    }
    await route.continue();
  });

  try {
    await loginAsManager(page);
    await page.goto("/automation");
    await expect(page.getByRole("heading", { name: "Automatiseringsopdrachten" })).toBeVisible();

    const statusFilter = page.getByRole("combobox", { name: "Status", exact: true });
    await statusFilter.selectOption("failed");
    await oldRequestStarted;
    await statusFilter.selectOption("pending");

    await expect(page.getByText("BK-RACE-NEW", { exact: true })).toBeVisible();
    releaseOldResponse();
    await oldResponseAttempted;

    await expect(page.getByText("BK-RACE-NEW", { exact: true })).toBeVisible();
    await expect(page.getByText("BK-RACE-OLD", { exact: true })).toHaveCount(0);
  } finally {
    releaseOldResponse();
  }
});