import { type ModelSlug, type ProviderKind } from "@t3tools/contracts";
import { page } from "vitest/browser";
import { afterEach, describe, expect, it, vi } from "vitest";
import { render } from "vitest-browser-react";

import { ProviderModelPicker } from "./ProviderModelPicker";

const MODEL_OPTIONS_BY_PROVIDER = {
  claudeAgent: [
    { slug: "claude-opus-4-6", name: "Claude Opus 4.6" },
    { slug: "claude-sonnet-4-6", name: "Claude Sonnet 4.6" },
    { slug: "claude-haiku-4-5", name: "Claude Haiku 4.5" },
  ],
  codex: [
    { slug: "gpt-5-codex", name: "GPT-5 Codex" },
    { slug: "gpt-5.3-codex", name: "GPT-5.3 Codex" },
  ],
} as const satisfies Record<ProviderKind, ReadonlyArray<{ slug: ModelSlug; name: string }>>;

async function mountPicker(props: {
  provider: ProviderKind;
  model: ModelSlug;
  lockedProvider: ProviderKind | null;
  triggerVariant?: "ghost" | "outline";
}) {
  const host = document.createElement("div");
  document.body.append(host);
  const onProviderModelChange = vi.fn();
  const screen = await render(
    <ProviderModelPicker
      provider={props.provider}
      model={props.model}
      lockedProvider={props.lockedProvider}
      modelOptionsByProvider={MODEL_OPTIONS_BY_PROVIDER}
      triggerVariant={props.triggerVariant}
      onProviderModelChange={onProviderModelChange}
    />,
    { container: host },
  );

  return {
    onProviderModelChange,
    cleanup: async () => {
      await screen.unmount();
      host.remove();
    },
  };
}

describe("ProviderModelPicker", () => {
  afterEach(() => {
    document.body.innerHTML = "";
  });

  it("shows provider submenus when provider switching is allowed", async () => {
    const mounted = await mountPicker({
      provider: "claudeAgent",
      model: "claude-opus-4-6",
      lockedProvider: null,
    });

    try {
      await page.getByRole("button").click();

      await vi.waitFor(() => {
        const text = document.body.textContent ?? "";
        expect(text).toContain("Codex");
        expect(text).toContain("Claude");
        expect(text).not.toContain("Claude Sonnet 4.6");
      });
    } finally {
      await mounted.cleanup();
    }
  });

  it("opens provider submenus with a visible gap from the parent menu", async () => {
    const mounted = await mountPicker({
      provider: "claudeAgent",
      model: "claude-opus-4-6",
      lockedProvider: null,
    });

    try {
      await page.getByRole("button").click();
      const providerTrigger = page.getByRole("menuitem", { name: "Codex" });
      await providerTrigger.hover();

      await vi.waitFor(() => {
        expect(document.body.textContent ?? "").toContain("GPT-5 Codex");
      });

      const providerTriggerElement = Array.from(
        document.querySelectorAll<HTMLElement>('[role="menuitem"]'),
      ).find((element) => element.textContent?.includes("Codex"));
      if (!providerTriggerElement) {
        throw new Error("Expected the Codex provider trigger to be mounted.");
      }

      const providerTriggerRect = providerTriggerElement.getBoundingClientRect();
      const modelElement = Array.from(
        document.querySelectorAll<HTMLElement>('[role="menuitemradio"]'),
      ).find((element) => element.textContent?.includes("GPT-5 Codex"));
      if (!modelElement) {
        throw new Error("Expected the submenu model option to be mounted.");
      }

      const submenuPopup = modelElement.closest('[data-slot="menu-sub-content"]');
      if (!(submenuPopup instanceof HTMLElement)) {
        throw new Error("Expected submenu popup to be mounted.");
      }

      const submenuRect = submenuPopup.getBoundingClientRect();

      expect(submenuRect.left).toBeGreaterThanOrEqual(providerTriggerRect.right);
      expect(submenuRect.left - providerTriggerRect.right).toBeGreaterThanOrEqual(2);
    } finally {
      await mounted.cleanup();
    }
  });

  it("shows models directly when the provider is locked mid-thread", async () => {
    const mounted = await mountPicker({
      provider: "claudeAgent",
      model: "claude-opus-4-6",
      lockedProvider: "claudeAgent",
    });

    try {
      await page.getByRole("button").click();

      await vi.waitFor(() => {
        const text = document.body.textContent ?? "";
        expect(text).toContain("Claude Sonnet 4.6");
        expect(text).toContain("Claude Haiku 4.5");
        expect(text).not.toContain("Codex");
      });
    } finally {
      await mounted.cleanup();
    }
  });

  it("dispatches the canonical slug when a model is selected", async () => {
    const mounted = await mountPicker({
      provider: "claudeAgent",
      model: "claude-opus-4-6",
      lockedProvider: "claudeAgent",
    });

    try {
      await page.getByRole("button").click();
      await page.getByRole("menuitemradio", { name: "Claude Sonnet 4.6" }).click();

      expect(mounted.onProviderModelChange).toHaveBeenCalledWith(
        "claudeAgent",
        "claude-sonnet-4-6",
      );
    } finally {
      await mounted.cleanup();
    }
  });

  it("accepts outline trigger styling", async () => {
    const mounted = await mountPicker({
      provider: "codex",
      model: "gpt-5-codex",
      lockedProvider: null,
      triggerVariant: "outline",
    });

    try {
      const button = document.querySelector("button");
      if (!(button instanceof HTMLButtonElement)) {
        throw new Error("Expected picker trigger button to be rendered.");
      }
      expect(button.className).toContain("border-input");
      expect(button.className).toContain("bg-popover");
    } finally {
      await mounted.cleanup();
    }
  });
});