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("the start menu's POKéDEX lists, opens entries and returns", async ({ page }) => {
  const errors: string[] = [];
  page.on("pageerror", (error) => errors.push(error.message));
  await start(page);
  const dex = page.locator("#pokedex-screen");
  await page.keyboard.press("Enter");
  await page.locator("#dialogue-choice").getByRole("option", { name: /^POKéDEX/ }).click();
  await expect(dex).toBeVisible();
  await expect(page.locator("#native-dialogue")).toBeHidden();
  const rows = dex.locator(".pokedex-list li");
  await expect(rows).toHaveCount(7);
  await expect(rows.first()).toHaveText(/CHIKORITA/);
  await expect(rows.first()).toHaveAttribute("aria-current", "true");
  await expect(rows.nth(1)).toHaveText(/-----/);
  await expect(dex.locator(".pokedex-counts")).toContainText("SEEN");
  await expect(dex.locator(".pokedex-pic")).toHaveAttribute("aria-label", "CHIKORITA");
  // Down three rows to CYNDAQUIL, which is owned.
  for (let i = 0; i < 3; i++) await page.keyboard.press("ArrowDown");
  await expect(rows.nth(3)).toHaveAttribute("aria-current", "true");
  await expect(rows.nth(3).locator(".pokedex-ball")).toHaveAttribute("aria-label", "Owned");
  await page.keyboard.press("KeyX");
  await expect(dex).toHaveAttribute("data-screen", "entry");
  await expect(dex.locator(".pokedex-entry-details")).toContainText("FIRE MOUSE");
  await expect(dex.locator(".pokedex-entry-details")).toContainText(`HT  1'08"`);
  await expect(dex.locator(".pokedex-page")).toHaveText("P.1");
  await page.keyboard.press("KeyX");
  await expect(dex.locator(".pokedex-page")).toHaveText("P.2");
  // Up steps back to the previous seen Pokémon, which is not caught.
  await page.keyboard.press("ArrowUp");
  await expect(dex.locator(".pokedex-entry-details")).toContainText("CHIKORITA");
  await expect(dex.locator(".pokedex-entry-details")).toContainText(`HT  ?'??"`);
  await expect(dex.locator(".pokedex-text")).toHaveText("");
  // B returns to the list, then to the start menu.
  await page.keyboard.press("KeyZ");
  await expect(dex).toHaveAttribute("data-screen", "list");
  await page.keyboard.press("KeyZ");
  await expect(dex).toBeHidden();
  await expect(page.locator("#dialogue-choice").getByRole("option", { name: /^POKéDEX/ })).toBeVisible();
  expect(errors).toEqual([]);
});

test("the Pokédex tab shows seen and owned records from the game", async ({ page }) => {
  await start(page);
  await page.locator("#tab-pokedex").click();
  const panel = page.locator("#panel-pokedex");
  await expect(panel.locator("h2")).toHaveText("SEEN 3 · OWN 1");
  const list = panel.locator(".pokedex-tab-list li");
  // PIDGEY is tenth in New mode.
  await expect(list).toHaveCount(10);
  await expect(list.nth(1)).toHaveText(/-----/);
  await panel.getByRole("button", { name: /CYNDAQUIL/ }).click();
  await expect(panel.locator(".pokedex-tab-entry")).toContainText("FIRE MOUSE");
  await expect(panel.locator(".pokedex-tab-entry .pokedex-text")).toHaveCount(2);
  await panel.getByRole("button", { name: /PIDGEY/ }).click();
  await expect(panel.locator(".pokedex-tab-entry")).toContainText("TINY BIRD");
  await expect(panel.locator(".pokedex-tab-entry")).toContainText("Catch this Pokémon");
  await expect(panel.locator(".pokedex-tab-entry .pokedex-text")).toHaveCount(0);
});