import assert from "node:assert/strict";
import { readFileSync } from "node:fs";
import test from "node:test";

import {
  hrefFromLinkTarget,
  interceptAppNavigation,
  isStaleClientBuild,
  navigateAppPath,
  readHealthGitCommit,
  rememberServerBuildCommit,
  resetAppNavigationForTests,
  setAppNavigationHostForTests,
  setClientBuildCommitForTests,
} from "../src/lib/app-navigation.ts";
import {
  peekChartPage,
  peekEphemerisPage,
  peekReportsPage,
  prefetchSecondaryPage,
  refreshChartPage,
  refreshEphemerisPage,
  refreshReportsPage,
  resetSecondaryPageDataForTests,
  writeChartPage,
} from "../src/lib/secondary-page-data.ts";
import { cssDeclarations } from "./css-contract-test-support.ts";

const chartView = readFileSync(new URL("../src/components/chart-page/chart-page-view.tsx", import.meta.url), "utf8");
const ephemerisPage = readFileSync(new URL("../src/components/ephemeris/ephemeris-page.tsx", import.meta.url), "utf8");
const reportsCenter = readFileSync(new URL("../src/components/personal-report/personal-report-center.tsx", import.meta.url), "utf8");
const sidebar = readFileSync(new URL("../src/components/app-sidebar.tsx", import.meta.url), "utf8");
const layout = readFileSync(new URL("../src/app/layout.tsx", import.meta.url), "utf8");
const dockerfile = readFileSync(new URL("../../deploy/railway-web.Dockerfile", import.meta.url), "utf8");
const globalStyles = readFileSync(new URL("../src/app/globals.css", import.meta.url), "utf8");
const chartHook = readFileSync(new URL("../src/hooks/use-chart-page.ts", import.meta.url), "utf8");

function clickEvent(overrides: Partial<{
  button: number;
  metaKey: boolean;
  ctrlKey: boolean;
  shiftKey: boolean;
  altKey: boolean;
  defaultPrevented: boolean;
}> = {}) {
  let defaultPrevented = overrides.defaultPrevented ?? false;
  return {
    button: overrides.button ?? 0,
    metaKey: overrides.metaKey ?? false,
    ctrlKey: overrides.ctrlKey ?? false,
    shiftKey: overrides.shiftKey ?? false,
    altKey: overrides.altKey ?? false,
    get defaultPrevented() {
      return defaultPrevented;
    },
    preventDefault() {
      defaultPrevented = true;
    },
  };
}

test("the three entry pages import the shared SecondaryPageShell", () => {
  for (const source of [chartView, ephemerisPage, reportsCenter]) {
    assert.match(source, /from "@\/components\/secondary-page-shell"/);
    assert.match(source, /<SecondaryPageShell/);
  }
  assert.doesNotMatch(chartView, /<SecondaryHeader title="星盘"/);
  assert.doesNotMatch(ephemerisPage, /<SecondaryHeader/);
  assert.doesNotMatch(reportsCenter, /<SecondaryHeader/);
  assert.doesNotMatch(chartView, /InlineSpinner|正在加载|skeleton/i);
  assert.doesNotMatch(ephemerisPage, /InlineSpinner|正在加载|skeleton/i);
  assert.doesNotMatch(reportsCenter, /正在读取报告|正在加载/);
});

test("the secondary-page body is a stable remaining-viewport cell", () => {
  const page = cssDeclarations(".secondary-page", globalStyles);
  assert.match(page, /display:\s*grid/);
  assert.match(page, /min-height:\s*0/);
  const waitingParent = cssDeclarations(".secondary-page:has(> .secondary-page-waiting)", globalStyles);
  assert.match(waitingParent, /align-content:\s*center/);
  const waiting = cssDeclarations(".secondary-page-waiting", globalStyles);
  assert.match(waiting, /text-align:\s*center/);
  assert.doesNotMatch(waiting, /spinner|skeleton/i);
});

test("a warm chart cache does not go through a null waiting state", async () => {
  resetSecondaryPageDataForTests();
  assert.equal(peekChartPage(), null);
  writeChartPage({
    kind: "view",
    view: { status: "chart_unavailable", billed: false, message: "这一张盘还没拿到。" },
  });
  const warm = peekChartPage();
  assert.equal(warm?.kind, "view");
  assert.notEqual(warm, null);
  const secondMountView = peekChartPage()?.kind === "view" ? peekChartPage() : null;
  assert.equal(secondMountView?.kind, "view");
  assert.match(chartHook, /useState<ChartViewResponse \| null>\(\(\) => viewFromSnapshot\(peekChartPage\(\)\)\)/);
});

test("chart / ephemeris / reports caches share one inflight fetch and keep the last result", async () => {
  resetSecondaryPageDataForTests();
  const originalFetch = globalThis.fetch;
  let chartCalls = 0;
  let ephemerisCalls = 0;
  let reportsCalls = 0;
  globalThis.fetch = (async (input: RequestInfo | URL) => {
    const url = String(input);
    if (url.includes("/api/chart-view")) {
      chartCalls += 1;
      return new Response("{}", { status: 401 });
    }
    if (url.includes("/api/ephemeris")) {
      ephemerisCalls += 1;
      return new Response("{}", { status: 401 });
    }
    if (url.includes("/api/reports")) {
      reportsCalls += 1;
      return new Response("{}", { status: 401 });
    }
    throw new Error(`unexpected fetch ${url}`);
  }) as typeof fetch;
  try {
    prefetchSecondaryPage("/chart");
    prefetchSecondaryPage("/ephemeris");
    prefetchSecondaryPage("/reports");
    const [chart, ephemeris, reports] = await Promise.all([
      refreshChartPage(),
      refreshEphemerisPage(),
      refreshReportsPage(),
    ]);
    assert.equal(chart.kind, "unauthenticated");
    assert.equal(ephemeris.kind, "unauthorized");
    assert.equal(reports.kind, "unauthorized");
    assert.equal(chartCalls, 1);
    assert.equal(ephemerisCalls, 1);
    assert.equal(reportsCalls, 1);
    assert.equal(peekChartPage()?.kind, "unauthenticated");
    assert.equal(peekEphemerisPage()?.kind, "unauthorized");
    assert.equal(peekReportsPage()?.kind, "unauthorized");
  } finally {
    globalThis.fetch = originalFetch;
    resetSecondaryPageDataForTests();
  }
});

test("sidebar prefetches the three entries on pointerenter and pointerdown", () => {
  assert.match(sidebar, /prefetchSecondaryPage\(href\)/);
  assert.match(sidebar, /onPointerEnter=\{\(\) => prefetchSecondaryPage\(href\)\}/);
  assert.match(sidebar, /onPointerDown=\{\(\) => prefetchSecondaryPage\(href\)\}/);
  assert.match(sidebar, /from "@\/lib\/secondary-page-data"/);
});

test("version mismatch navigates with location.assign; a match keeps the client router", () => {
  resetAppNavigationForTests();
  const assigned: string[] = [];
  setAppNavigationHostForTests({ assign: (href) => assigned.push(href) });
  setClientBuildCommitForTests("old-sha");
  rememberServerBuildCommit("new-sha");
  assert.equal(isStaleClientBuild(), true);

  const staleClick = clickEvent();
  interceptAppNavigation(staleClick, "/chart");
  assert.equal(staleClick.defaultPrevented, true);
  assert.deepEqual(assigned, ["/chart"]);

  assigned.length = 0;
  navigateAppPath("/ephemeris", (href) => assigned.push(`client:${href}`));
  assert.deepEqual(assigned, ["/ephemeris"]);

  assigned.length = 0;
  rememberServerBuildCommit("old-sha");
  assert.equal(isStaleClientBuild(), false);
  const freshClick = clickEvent();
  interceptAppNavigation(freshClick, "/reports");
  assert.equal(freshClick.defaultPrevented, false);
  assert.equal(assigned.length, 0);
  navigateAppPath("/reports", (href) => assigned.push(`client:${href}`));
  assert.deepEqual(assigned, ["client:/reports"]);

  assigned.length = 0;
  rememberServerBuildCommit(null);
  interceptAppNavigation(clickEvent(), "/chart");
  assert.equal(assigned.length, 0);
  resetAppNavigationForTests();
});

test("modified clicks and health-shaped payloads stay out of the hard-nav path", () => {
  resetAppNavigationForTests();
  const assigned: string[] = [];
  setAppNavigationHostForTests({ assign: (href) => assigned.push(href) });
  setClientBuildCommitForTests("old-sha");
  rememberServerBuildCommit("new-sha");
  interceptAppNavigation(clickEvent({ metaKey: true }), "/chart");
  interceptAppNavigation(clickEvent({ button: 1 }), "/chart");
  interceptAppNavigation(clickEvent(), "https://example.com");
  assert.equal(assigned.length, 0);
  assert.equal(readHealthGitCommit({ deployment: { gitCommit: "abc" } }), "abc");
  assert.equal(readHealthGitCommit({ status: "ok" }), null);
  assert.equal(hrefFromLinkTarget("/chart"), "/chart");
  assert.equal(hrefFromLinkTarget({ pathname: "/reports", search: "?x=1" }), "/reports?x=1");
  resetAppNavigationForTests();
});

test("the root layout checks health on visibility, not on a timer", () => {
  const guard = readFileSync(new URL("../src/components/stale-build-guard.tsx", import.meta.url), "utf8");
  assert.match(layout, /StaleBuildGuard/);
  assert.match(guard, /visibilitychange/);
  assert.match(guard, /syncBuildCommitFromHealth/);
  assert.doesNotMatch(guard, /setInterval|setTimeout/);
  assert.match(dockerfile, /NEXT_PUBLIC_GIT_COMMIT=\$\{NEXT_DEPLOYMENT_ID\}/);
});