import "./install-test-document";
import assert from "node:assert/strict";
import { readFileSync } from "node:fs";
import test from "node:test";

import { ReportActions } from "../src/components/personal-report/report-actions.tsx";
import { ReportExportDrawer } from "../src/components/personal-report/report-export-drawer.tsx";
import { SynastryReportView } from "../src/components/synastry/synastry-report-view.tsx";
import { buildReportExportBlocks } from "../src/lib/report-export-blocks.ts";
import { createClientLifecycleHarness } from "./react-client-lifecycle-test-support.ts";

const css = readFileSync(new URL("../src/app/globals.css", import.meta.url), "utf8");

type Node = ReturnType<ReturnType<typeof createClientLifecycleHarness>["elements"]>[number];

function splitTop(input: string): string[] {
  const parts: string[] = [];
  let depth = 0;
  let start = 0;
  for (let index = 0; index < input.length; index += 1) {
    const char = input[index];
    if (char === "(") depth += 1;
    else if (char === ")") depth -= 1;
    else if (char === "," && depth === 0) {
      parts.push(input.slice(start, index));
      start = index + 1;
    }
  }
  parts.push(input.slice(start));
  return parts;
}

function matchesCompound(node: Node, compound: string): boolean {
  const isAt = compound.indexOf(":is(");
  let rest = compound;
  if (isAt >= 0) {
    rest = compound.slice(0, isAt);
    const inner = compound.slice(isAt + 4, compound.lastIndexOf(")"));
    if (!splitTop(inner).some((option) => matchesCompound(node, option.trim()))) return false;
  }
  const parts = rest.match(/[a-zA-Z][\w-]*|\.[\w-]+|\[[^\]]+\]/g) ?? [];
  if (parts.length === 0) return isAt >= 0;
  const classes = (node.getAttribute("class") ?? "").split(/\s+/);
  for (const part of parts) {
    if (part.startsWith(".")) {
      if (!classes.includes(part.slice(1))) return false;
    } else if (part.startsWith("[")) {
      const body = part.slice(1, -1);
      const named = /^([\w-]+)(?:="([^"]*)")?$/.exec(body);
      if (!named || !node.hasAttribute(named[1])) return false;
      if (named[2] !== undefined && node.getAttribute(named[1]) !== named[2]) return false;
    } else if (node.tagName.toLowerCase() !== part.toLowerCase()) return false;
  }
  return true;
}

function selectorCompounds(selector: string): string[] {
  const compounds: string[] = [];
  let depth = 0;
  let start = 0;
  const source = selector.trim();
  for (let index = 0; index < source.length; index += 1) {
    const char = source[index];
    if (char === "(") depth += 1;
    else if (char === ")") depth -= 1;
    else if (/\s/.test(char) && depth === 0) {
      if (index > start) compounds.push(source.slice(start, index));
      start = index + 1;
    }
  }
  if (start < source.length) compounds.push(source.slice(start));
  return compounds.filter(Boolean);
}

function matchesSelector(node: Node, selector: string): boolean {
  const compounds = selectorCompounds(selector);
  let cursor: Node | null = node;
  for (let index = compounds.length - 1; index >= 0; index -= 1) {
    const start: Node | null = index === compounds.length - 1 ? cursor : cursor?.parentNode ?? null;
    let found: Node | null = null;
    for (let walk: Node | null = start; walk; walk = index === compounds.length - 1 ? null : walk.parentNode) {
      if (matchesCompound(walk, compounds[index])) {
        found = walk;
        break;
      }
      if (index === compounds.length - 1) break;
    }
    if (!found) return false;
    cursor = found;
  }
  return true;
}

function themeRules() {
  const clean = css.replace(/\/\*[\s\S]*?\*\//g, " ");
  const rules: { selector: string; body: string }[] = [];
  for (const hit of clean.matchAll(/([^{}@]+)\{([^{}]*)\}/g)) {
    const selector = hit[1].trim();
    if (!selector || selector.includes("@")) continue;
    rules.push({ selector, body: hit[2] });
  }
  return rules.filter((rule) => /\[data-active\]|\[aria-selected="true"\]/.test(rule.selector)
    && /--color-action-strong|--color-action\b/.test(rule.body));
}

function hitsTheme(node: Node): boolean {
  return themeRules().some((rule) => splitTop(rule.selector).some((selector) => matchesSelector(node, selector.trim())));
}

function tabsIn(nodes: Node[], owner: Node) {
  return nodes.filter((node) => node.getAttribute("role") === "tab" && owner.contains(node));
}

function pair(nodes: Node[], owner: Node, label: string) {
  const tabs = tabsIn(nodes, owner);
  const selected = tabs.find((node) => node.getAttribute("aria-selected") === "true");
  const unselected = tabs.find((node) => node.getAttribute("aria-selected") === "false");
  assert.ok(selected, `${label} selected`);
  assert.ok(unselected, `${label} unselected`);
  assert.equal(selected.hasAttribute("data-active"), true, `${label} selected mark`);
  assert.equal(unselected.hasAttribute("data-active"), false, `${label} unselected mark`);
  assert.notEqual(
    `${selected.getAttribute("class")}|${selected.getAttribute("aria-selected")}|${selected.hasAttribute("data-active")}`,
    `${unselected.getAttribute("class")}|${unselected.getAttribute("aria-selected")}|${unselected.hasAttribute("data-active")}`,
    `${label} class or attribute`,
  );
  assert.equal(hitsTheme(selected), true, `${label} theme rule`);
  assert.equal(hitsTheme(unselected), false, `${label} unselected theme rule`);
}

test("the three language switches and the export scope card show which one is selected", async () => {
  assert.doesNotMatch(css, /\.report-language-switch button\[aria-pressed/);
  assert.doesNotMatch(css, /\.report-export-segment button\[aria-checked/);
  assert.doesNotMatch(css, /\.synastry-lang button\[aria-pressed/);

  const zh = buildReportExportBlocks({ markdown: "# 报告\n\n## 摘要\n\n甲的月亮在第九宫。\n" });
  const en = buildReportExportBlocks({
    markdown: "# Report\n\n## Summary\n\nThe Moon sits in the ninth house.\n",
    language: "en",
  });
  const harness = createClientLifecycleHarness();
  try {
    await harness.render(
      <>
        <ReportActions markdown="# 报告" englishEdition="ready" language="zh" onLanguageChange={() => {}} />
        <ReportExportDrawer editions={{ zh, en }} englishEdition="ready" onClose={() => {}} />
        <SynastryReportView
          reportId="00000000-0000-4000-8000-000000001445"
          snapshot={{
            names: { a: "甲", b: "乙" },
            sections: [{ id: "bond", title: "关系", text: "一段说明。" }],
            english: { sections: [{ id: "bond", title: "Bond", text: "A note." }] },
          }}
        />
      </>,
    );
    await harness.idle();
    const roots = [harness.container, ...[...harness.document.body.childNodes]];
    const nodes = roots.flatMap((node) => {
      const walk = (current: Node): Node[] => [current, ...current.childNodes.flatMap((child) => walk(child))];
      return walk(node);
    });
    const list = (label: string) => {
      const found = nodes.find((node) => node.getAttribute("role") === "tablist" && node.getAttribute("aria-label") === label);
      assert.ok(found, label);
      return found;
    };
    pair(nodes, list("报告语言"), "报告语言");
    pair(nodes, list("导出语言"), "导出语言");
    pair(nodes, list("导出范围"), "导出范围");
    const synastry = nodes.find((node) => (node.getAttribute("class") ?? "").split(/\s+/).includes("synastry-lang"));
    assert.ok(synastry, "合盘语言");
    pair(nodes, synastry, "合盘语言");
    assert.equal(harness.errors.length, 0, harness.errors.map(String).join("\n"));
  } finally {
    await harness.close();
  }
});