import assert from "node:assert/strict";
import { test } from "node:test";
import { chromium, type Page } from "playwright";
import { generateLocators, verifyLocators } from "../src/locator.js";
import type { RawActionableElement } from "../src/types.js";

function raw(overrides: Partial<RawActionableElement>): RawActionableElement {
  return {
    uid: "button_0_Open settings",
    candidateIndex: 0,
    tag: "button",
    role: "button",
    accessibleName: "Open settings",
    identityText: "Open settings",
    text: "Open settings",
    label: null,
    placeholder: null,
    attributes: { "data-testid": "open-settings", id: "openSettings" },
    bbox: { x: 0, y: 0, width: 100, height: 30 },
    visibility: { visible: true, enabled: true, editable: false, receivesEvents: true },
    context: {
      dialog: null,
      form: null,
      section: null,
      row: null,
      landmark: null,
      listitem: null,
    },
    parameterSurface: null,
    evidence: [],
    ...overrides,
  };
}

async function withPage<T>(html: string, callback: (page: Page) => Promise<T>): Promise<T> {
  const browser = await chromium.launch();
  const page = await browser.newPage();
  try {
    await page.setContent(html);
    return await callback(page);
  } finally {
    await browser.close();
  }
}

test("locator generation prioritizes user-facing Playwright locators before CSS fallbacks", () => {
  const candidates = generateLocators("el_test", raw({}));
  assert.equal(candidates[0].strategy, "role");
  assert.equal(candidates[0].framework, "playwright");
  assert.equal(candidates.some((candidate) => candidate.strategy === "testId"), true);
  assert.equal(candidates.at(-1)?.strategy, "css");
});

test("locator generation keeps CSS as fallback for id and name", () => {
  const candidates = generateLocators(
    "el_input",
    raw({
      tag: "input",
      role: "textbox",
      accessibleName: "Query",
      text: null,
      label: "Query",
      placeholder: "Search customers",
      attributes: { id: "queryInput", name: "q" },
    }),
  );
  assert.equal(candidates.some((candidate) => candidate.expression.includes("#queryInput")), true);
  assert.equal(candidates.some((candidate) => candidate.expression.includes("[name=")), true);
});

test("locator candidates carry context-scope evidence for duplicated actions", () => {
  const candidates = generateLocators(
    "el_edit",
    raw({
      uid: "button_4_Edit",
      tag: "button",
      role: "button",
      accessibleName: "Edit",
      text: "Edit",
      attributes: {},
      context: {
        dialog: null,
        form: null,
        section: { kind: "section", name: "Customers", text: "Customers Acme Co Active Edit" },
        row: { kind: "row", name: null, text: "Acme Co Active Edit" },
        landmark: null,
        listitem: null,
      },
    }),
  );
  assert.equal(candidates[0].scopes.some((scope) => scope.kind === "row"), true);
});

test("placeholder-only input locator verifies identity from raw placeholder evidence", async () => {
  await withPage(`<input placeholder="Search customers" />`, async (page) => {
    const rawElement = raw({
      uid: "input_0_Search customers",
      tag: "input",
      role: "textbox",
      accessibleName: "Search customers",
      identityText: "Search customers",
      text: null,
      label: null,
      placeholder: "Search customers",
      attributes: {},
      visibility: { visible: true, enabled: true, editable: true, receivesEvents: true },
    });
    const placeholder = generateLocators("el_placeholder", rawElement).find((candidate) => candidate.strategy === "placeholder");
    assert.ok(placeholder);

    const [verified] = await verifyLocators(page, rawElement, [placeholder]);

    assert.equal(verified.verified, true);
    assert.equal(verified.matchCount, 1);
    assert.equal(verified.identity?.sameAccessibleName, true);
  });
});

test("label-derived input locator verifies identity from raw label evidence", async () => {
  await withPage(`<label for="query">Query</label><input id="query" />`, async (page) => {
    const rawElement = raw({
      uid: "input_0_Query",
      tag: "input",
      role: "textbox",
      accessibleName: "Query",
      identityText: "Query",
      text: null,
      label: "Query",
      placeholder: null,
      attributes: { id: "query" },
      visibility: { visible: true, enabled: true, editable: true, receivesEvents: true },
    });
    const label = generateLocators("el_label", rawElement).find((candidate) => candidate.strategy === "label");
    assert.ok(label);

    const [verified] = await verifyLocators(page, rawElement, [label]);

    assert.equal(verified.verified, true);
    assert.equal(verified.matchCount, 1);
    assert.equal(verified.identity?.sameAccessibleName, true);
  });
});

test("duplicate Edit locators are unverified and omit non-unique identity evidence", async () => {
  await withPage(`<button>Edit</button><button>Edit</button>`, async (page) => {
    const rawElement = raw({
      uid: "button_0_Edit",
      tag: "button",
      role: "button",
      accessibleName: "Edit",
      identityText: "Edit",
      text: "Edit",
      attributes: {},
    });
    const duplicateLocators = generateLocators("el_edit", rawElement).filter((candidate) => ["role", "text"].includes(candidate.strategy));
    assert.equal(duplicateLocators.length, 2);

    const verified = await verifyLocators(page, rawElement, duplicateLocators);

    for (const locator of verified) {
      assert.equal(locator.verified, false);
      assert.equal(locator.matchCount, 2);
      assert.equal(locator.identity, null);
    }
  });
});