import { test, expect } from "@playwright/test";
import { loginViaAPI } from "./helpers/auth.js";
import { mockSettings, mockAPIError } from "./helpers/mock-api.js";

/**
 * RCA-18: Settings page
 *
 * Covers:
 * - Three tabs: Sync / Security / Appearance
 * - Settings are pre-populated from GET /admin/settings
 * - Changes saved via PATCH /admin/settings
 * - Success toast on save
 * - Password change (security tab)
 * - Theme selection (appearance tab)
 * - Language selection (appearance tab)
 * - API error on save
 */

test.describe("Settings page", () => {
  test.beforeEach(async ({ page, request }) => {
    await loginViaAPI(page, request);
    await mockSettings(page);
  });

  test("displays three tabs: sync, security, appearance", async ({ page }) => {
    await page.goto("/settings");

    await expect(page.getByRole("tab", { name: /sync/i })).toBeVisible();
    await expect(page.getByRole("tab", { name: /security/i })).toBeVisible();
    await expect(page.getByRole("tab", { name: /appearance/i })).toBeVisible();
  });

  // --- Sync tab ---

  test("sync tab: auto-sync toggle reflects saved value", async ({ page }) => {
    await page.goto("/settings");

    await page.getByRole("tab", { name: /sync/i }).click();

    const toggle = page
      .getByRole("switch", { name: /auto.?sync/i })
      .or(page.getByLabel(/auto.?sync/i));
    // Mock returns autoSync: true
    await expect(toggle).toBeChecked();
  });

  test("sync tab: frequency selector shows current value", async ({ page }) => {
    await page.goto("/settings");
    await page.getByRole("tab", { name: /sync/i }).click();

    // Mock returns frequency: "realtime"
    const select = page
      .getByLabel(/frequency/i)
      .or(page.getByRole("combobox").filter({ hasText: /realtime/i }));
    await expect(select).toBeVisible();
  });

  test("sync tab: saving calls PATCH /admin/settings", async ({ page }) => {
    let patchCalled = false;
    await page.route("**/admin/settings", (route) => {
      if (route.request().method() === "PATCH") {
        patchCalled = true;
        return route.fulfill({ status: 200, contentType: "application/json", body: "{}" });
      }
      return route.continue();
    });

    await page.goto("/settings");
    await page.getByRole("tab", { name: /sync/i }).click();

    // Toggle auto-sync off
    const toggle = page
      .getByRole("switch", { name: /auto.?sync/i })
      .or(page.getByLabel(/auto.?sync/i));
    await toggle.click();

    // Some implementations save immediately; others have an explicit Save button
    const saveBtn = page.getByRole("button", { name: /save/i });
    if (await saveBtn.isVisible()) await saveBtn.click();

    expect(patchCalled).toBe(true);
  });

  test("sync tab: success toast appears after save", async ({ page }) => {
    await page.route("**/admin/settings", (route) => {
      if (route.request().method() === "PATCH") {
        return route.fulfill({ status: 200, contentType: "application/json", body: "{}" });
      }
      return route.continue();
    });

    await page.goto("/settings");
    await page.getByRole("tab", { name: /sync/i }).click();

    const toggle = page
      .getByRole("switch", { name: /auto.?sync/i })
      .or(page.getByLabel(/auto.?sync/i));
    await toggle.click();

    const saveBtn = page.getByRole("button", { name: /save/i });
    if (await saveBtn.isVisible()) await saveBtn.click();

    await expect(
      page.getByText(/saved|success|updated/i).first(),
    ).toBeVisible({ timeout: 5000 });
  });

  // --- Security tab ---

  test("security tab: change password requires current + new + confirm", async ({ page }) => {
    await page.goto("/settings");
    await page.getByRole("tab", { name: /security/i }).click();

    await expect(page.getByLabel(/current password/i)).toBeVisible();
    await expect(page.getByLabel(/new password/i)).toBeVisible();
    await expect(page.getByLabel(/confirm.*(new )?password/i)).toBeVisible();
  });

  test("security tab: password change with mismatch shows error", async ({ page }) => {
    await page.goto("/settings");
    await page.getByRole("tab", { name: /security/i }).click();

    await page.getByLabel(/current password/i).fill("oldPass123");
    await page.getByLabel(/new password/i).fill("NewPass456!");
    await page.getByLabel(/confirm.*(new )?password/i).fill("Different789!");

    await page.getByRole("button", { name: /change|save password|update/i }).click();

    await expect(page.getByText(/do not match|mismatch|must match/i)).toBeVisible();
  });

  test("security tab: session timeout field accepts numeric input", async ({ page }) => {
    await page.goto("/settings");
    await page.getByRole("tab", { name: /security/i }).click();

    const timeoutField = page
      .getByLabel(/session timeout/i)
      .or(page.getByRole("spinbutton").filter({ hasText: /timeout/i }));
    if (await timeoutField.isVisible()) {
      await timeoutField.fill("120");
      await expect(timeoutField).toHaveValue("120");
    }
  });

  // --- Appearance tab ---

  test("appearance tab: theme options present (light/dark/system)", async ({ page }) => {
    await page.goto("/settings");
    await page.getByRole("tab", { name: /appearance/i }).click();

    await expect(page.getByText(/light/i)).toBeVisible();
    await expect(page.getByText(/dark/i)).toBeVisible();
    await expect(page.getByText(/system/i)).toBeVisible();
  });

  test("appearance tab: language selector shows Chinese and English options", async ({ page }) => {
    await page.goto("/settings");
    await page.getByRole("tab", { name: /appearance/i }).click();

    await expect(
      page.getByText(/chinese|中文/i).or(page.getByText("zh")),
    ).toBeVisible();
    await expect(
      page.getByText(/english/i).or(page.getByText("en")),
    ).toBeVisible();
  });

  // --- Error states ---

  test("shows error message when settings fail to load", async ({ page }) => {
    await page.unroute("**/admin/settings*");
    await mockAPIError(page, "**/admin/settings*", 500, "Failed to load settings");

    await page.goto("/settings");
    await expect(
      page
        .getByRole("alert")
        .or(page.getByText(/error|failed|could not load/i))
        .first(),
    ).toBeVisible();
  });

  test("shows error toast when save fails", async ({ page }) => {
    await page.route("**/admin/settings", (route) => {
      if (route.request().method() === "PATCH") {
        return route.fulfill({
          status: 500,
          contentType: "application/json",
          body: JSON.stringify({ error: "Server error" }),
        });
      }
      return route.continue();
    });

    await page.goto("/settings");
    await page.getByRole("tab", { name: /sync/i }).click();

    const toggle = page
      .getByRole("switch", { name: /auto.?sync/i })
      .or(page.getByLabel(/auto.?sync/i));
    await toggle.click();

    const saveBtn = page.getByRole("button", { name: /save/i });
    if (await saveBtn.isVisible()) await saveBtn.click();

    await expect(
      page.getByText(/error|failed|could not save/i).first(),
    ).toBeVisible({ timeout: 5000 });
  });
});