import { test, expect, type Page } from "@playwright/test";
import { existsSync } from "node:fs";
import { resolve } from "node:path";

const romPath = resolve(
  process.env.CRYSTAL_ROM_PATH ?? "Pokemon - Crystal Version (UE) (V1.1) [C][!].gbc",
);
test.beforeEach(() => test.skip(!existsSync(romPath), "Requires the local user ROM."));

async function start(page: Page) {
  await page.route("**/src/game/runtime.ts", async (route) => {
    const response = await route.fetch(),
      source = await response.text();
    const needle = "const world = new GameWorld(assets);";
    expect(source).toContain(needle);
    // Fixture worlds stand in for a saved session, so no introduction runs.
    expect(source).toContain("this.world?.beginIntro();");
    await route.fulfill({
      response,
      body: source.replace("this.world?.beginIntro();", "").replace(
        needle,
        `const { pokedexFixtureWorld } = await import('/tests/pokedex-fixture.ts'); const world = pokedexFixtureWorld(assets);`,
      ),
    });
  });
  await page.clock.install({ time: new Date("2026-09-22T12:00:00") });
  await page.goto("/");
  await page.locator("#rom-file").setInputFiles(romPath);
  await expect(page.locator("#status")).toContainText("verified");
  await page.clock.pauseAt(new Date("2026-09-22T12:05:00"));
  await page.locator("#play").click();
}

test("settings rebind a key, scale the text and survive a reload", async ({ page }) => {
  await start(page);
  const dialog = page.locator("#settings-dialog");
  await page.locator("#settings").click();
  await expect(dialog).toBeVisible();
  const startRow = dialog.locator("#key-table tr", { hasText: "START" });
  await expect(startRow).toContainText("Enter");
  // Escape cancels a key change without closing the dialog.
  await startRow.getByRole("button", { name: /Change the key for START/ }).click();
  await expect(startRow).toContainText("Press a key");
  await page.keyboard.press("Escape");
  await expect(dialog).toBeVisible();
  await expect(page.locator("#settings-status")).toHaveText("Key change cancelled.");
  // Space is reserved; Q becomes START.
  await startRow.getByRole("button", { name: /Change the key for START/ }).click();
  await page.keyboard.press("Space");
  await expect(page.locator("#settings-status")).toContainText("keeps its usual role");
  await startRow.getByRole("button", { name: /Change the key for START/ }).click();
  await page.keyboard.press("KeyQ");
  await expect(startRow).toContainText("Q");
  await expect(page.locator("#settings-status")).toHaveText("START is now Q.");
  await dialog.getByLabel("Large", { exact: true }).check();
  await expect(page.locator("html")).toHaveAttribute("style", /--text-scale: 1.25/);
  await page.locator("#close-settings").click();
  await expect(page.locator("#game-screen")).toHaveAttribute("aria-label", /Q is START/);

  // Enter no longer opens the start menu; Q does.
  await page.locator("#play").click();
  await page.locator("#game-screen").focus();
  await page.keyboard.press("Enter");
  await page.clock.runFor(200);
  await expect(page.locator("#dialogue-choice")).toBeHidden();
  await page.keyboard.press("KeyQ");
  await expect(page.locator("#dialogue-choice").getByRole("option", { name: /^POKéDEX/ })).toBeVisible();

  // The choices stay after a reload.
  await page.reload();
  await expect(page.locator("html")).toHaveAttribute("style", /--text-scale: 1.25/);
  await page.locator("#settings").click();
  await expect(page.locator("#key-table tr", { hasText: "START" })).toContainText("Q");
  await page.locator("#reset-keys").click();
  await expect(page.locator("#key-table tr", { hasText: "START" })).toContainText("Enter");
});

test("help lists the current keys", async ({ page }) => {
  await start(page);
  await page.locator("#help").click();
  const keys = page.locator("#help-keys");
  await expect(keys).toContainText("Interact / Continue");
  await expect(keys).toContainText("X (A)");
  await expect(keys).toContainText("Enter (START)");
});