import { describe, expect, test } from "bun:test";
import { readFileSync } from "node:fs";
import { renderComponent, mountHtml } from "../../test/src/index.ts";
import { uiComponentPath } from "../src/registry.ts";
import { parse } from "../../compiler/src/index.ts";

const source = (name: string) => readFileSync(uiComponentPath(name), "utf8");

describe("account shell UI regressions", () => {
  test("Sidebar supplies navigation to its mobile Drawer without an app slot", async () => {
    const dom = mountHtml(
      await renderComponent(source("Sidebar"), {
        items: [
          { heading: "Account", items: [{ label: "Profile", href: "/profile", value: "profile" }] },
        ],
        active: "profile",
      }),
    );
    const mobileNav = dom.querySelector(".wrn-sidebar__drawer-nav");
    expect(mobileNav?.querySelector('a[href="/profile"]')?.getAttribute("aria-current")).toBe(
      "page",
    );
    expect(dom.querySelector('.wrn-sidebar__rail a[href="/profile"]')).not.toBeNull();
  });

  test("Sidebar embedded in another drawer does not generate a second mobile drawer", async () => {
    const dom = mountHtml(
      await renderComponent(source("Sidebar"), {
        mobile: false,
        items: [{ label: "Profile", href: "/profile" }],
      }),
    );
    expect(dom.querySelector('[data-component="Drawer"]')).toBeNull();
    expect(dom.querySelector(".wrn-sidebar")?.getAttribute("data-mobile")).toBe("false");
  });

  test("Sidebar blocks disabled links at every nesting level", async () => {
    const dom = mountHtml(
      await renderComponent(source("Sidebar"), {
        items: [
          {
            label: "Parent",
            disabled: true,
            href: "/parent",
            items: [
              {
                label: "Child",
                disabled: true,
                href: "/child",
                items: [{ label: "Leaf", disabled: true, href: "/leaf" }],
              },
            ],
          },
        ],
      }),
    );
    for (const href of ["/parent", "/child", "/leaf"]) {
      const link = dom.querySelector(`.wrn-sidebar__rail a[href="${href}"]`)!;
      expect(link.getAttribute("aria-disabled")).toBe("true");
      expect(link.getAttribute("tabindex")).toBe("-1");
      const click = new (dom.window as { MouseEvent: typeof MouseEvent }).MouseEvent("click", {
        bubbles: true,
        cancelable: true,
      });
      link.dispatchEvent(click);
      expect(click.defaultPrevented).toBe(true);
    }
  });

  test("Dropdown keyboard navigation skips disabled links and ArrowUp starts at the last item", async () => {
    const dom = mountHtml(
      await renderComponent(source("Dropdown"), {
        label: "Account",
        items: [
          { label: "Profile", href: "/profile" },
          { label: "Disabled", href: "/disabled", disabled: true },
          { label: "Security", href: "/security" },
        ],
      }),
    );
    const trigger = dom.querySelector(".wrn-dropdown__trigger") as HTMLButtonElement;
    // Execute the component's real JS functions: the lightweight mount runtime
    // intentionally does not interpret nested timer callbacks.
    const functions = parse(source("Dropdown"))
      .functions.join("\n")
      .replace(/\b(client|shared) function/g, "function");
    const handle = new Function(
      "document",
      "window",
      "output",
      `
      let open = false, visible = false, disabled = false;
      ${functions}
      return handleKeydown;
    `,
    )(dom.document, dom.window, {
      open() {},
      close() {},
      toggle({ open }: { open: boolean }) {
        trigger.setAttribute("aria-expanded", String(open));
      },
    });
    const key = (_target: Element, value: string) =>
      handle({
        key: value,
        currentTarget: dom.querySelector(".wrn-dropdown"),
        preventDefault() {},
        stopPropagation() {},
      });
    trigger.focus();
    key(trigger, "ArrowUp");
    await new Promise((resolve) => setTimeout(resolve, 10));
    expect(dom.document.activeElement?.textContent).toContain("Security");
    key(dom.document.activeElement!, "ArrowUp");
    await new Promise((resolve) => setTimeout(resolve, 10));
    expect(dom.document.activeElement?.textContent).toContain("Profile");
    key(dom.document.activeElement!, "Escape");
    expect(dom.document.activeElement).toBe(trigger);
    expect(trigger.getAttribute("aria-expanded")).toBe("false");
  });

  test("Dropdown preserves falsy action values and has an explicit accessible trigger name", async () => {
    const dom = mountHtml(
      await renderComponent(source("Dropdown"), {
        label: "",
        ariaLabel: "Account menu",
        items: [{ label: "Zero", value: 0, action: true }],
      }),
    );
    let value: unknown = undefined;
    dom.querySelector(".wrn-dropdown")!.addEventListener("action", (event) => {
      value = (event as CustomEvent).detail.value;
    });
    const trigger = dom.querySelector(".wrn-dropdown__trigger") as HTMLButtonElement;
    expect(trigger.getAttribute("aria-label")).toBe("Account menu");
    trigger.click();
    (dom.querySelector("[data-dropdown-item]") as HTMLButtonElement).click();
    expect(value).toBe(0);
  });

  test("Dropdown closes when keyboard focus leaves the component", async () => {
    const dom = mountHtml(
      await renderComponent(source("Dropdown"), {
        label: "Menu",
        items: [{ label: "Profile", href: "/profile" }],
      }),
    );
    const trigger = dom.querySelector(".wrn-dropdown__trigger") as HTMLButtonElement;
    trigger.click();
    const outside = dom.document.createElement("button");
    dom.document.body.append(outside);
    trigger.dispatchEvent(
      new (dom.window as { FocusEvent: typeof FocusEvent }).FocusEvent("focusout", {
        bubbles: true,
        relatedTarget: outside,
      }),
    );
    expect(trigger.getAttribute("aria-expanded")).toBe("false");
  });

  test("layout fixes belong to components, not consuming applications", () => {
    expect(source("Sidebar")).toMatch(
      /\.wrn-sidebar__icon\s*\{[^}]*width: 1.05rem;[^}]*height: 1.05rem;/s,
    );
    expect(source("Sidebar")).toContain("margin-inline-start");
    expect(source("Dropdown")).toContain(".wrn-dropdown[data-placement] .wrn-dropdown__panel");
    expect(source("Footer")).toMatch(/\.wrn-footer__copyright-left\s*\{\s*grid-column: 1;/);
    expect(source("Footer")).toMatch(/\.wrn-footer__copyright-right\s*\{\s*grid-column: 3;/);
  });
});