import { browserSession } from "../browser/session";
import { register } from "../engine/registry";
import { RuntimeError, type BrowserLike, type BrowserTabInfo, type RunContext } from "../engine/types";

/** 优先使用流程中「打开网页」已建立的浏览器会话（含外部 Edge/Chrome），否则退回内置 */
async function currentSession(ctx: RunContext): Promise<BrowserLike> {
  return ctx.browser ?? (await browserSession());
}

/** 标题匹配：优先按正则解释，非法正则退化为字面包含 */
function titleMatcher(title: string): (tab: BrowserTabInfo) => boolean {
  let pattern: RegExp;
  try {
    pattern = new RegExp(title);
  } catch {
    pattern = new RegExp(title.replace(/[.*+?^${}()|[\]\\]/g, "\\$&"));
  }
  return (tab) => pattern.test(tab.title) || tab.title.includes(title);
}

function cssValue(selector: unknown): string {
  const raw = typeof selector === "object" && selector !== null
    ? String((selector as { value?: string }).value ?? "")
    : String(selector ?? "");
  const text = raw.trim();
  return text.startsWith("css:") ? text.slice(4).trim() : text;
}

function requireUploadPath(args: Record<string, unknown>): string {
  const filePath = String(args.file_path ?? args.filePath ?? args.path ?? "").trim();
  const folder = String(args.folder_path ?? args.folder ?? "").trim();
  const target = filePath || folder;
  if (!target) {
    throw new RuntimeError("validation_error", "上传文件路径为空", { recommendation: "填写要上传的本地文件完整路径" });
  }
  return target;
}

register(["Element_FileUploader", "WebBrowser_Upload", "WebBrowser_UploadDialog"], async (ctx, node, args) => {
  const browser = await currentSession(ctx);
  const selector = cssValue(args.uiSelector ?? "css:input[type=file]") || "input[type=file]";
  const filePath = requireUploadPath(args);
  const nodeId = await browser.uploadFileToInput?.(selector, filePath);
  ctx.log("已设置上传文件：" + filePath, "info", node.id);
  return { uploaded: true, selector, filePath, nodeId };
});

register(["WebBrowser_GetTAB", "WebBrowser_GetTAB_V1", "WebBrowser_GetTAB_V2"], async (ctx, node, args) => {
  const browser = await currentSession(ctx);
  const tabs = (await browser.listTabs?.()) ?? [{ index: 0, targetId: "", title: "", url: await browser.currentUrl(), active: true }];
  const title = String(args.title ?? "").trim();
  const url = String(args.url ?? "").trim();
  const matchType = String(args.match_type ?? "0"); // 0=按标题 1=按网址
  let matched = tabs;
  if (title && (matchType !== "1" || !url)) matched = matched.filter(titleMatcher(title));
  if (url && (matchType === "1" || !title)) matched = matched.filter((tab) => tab.url.includes(url));
  if (matched.length === 0) {
    throw new RuntimeError("tab_not_found", "没有匹配的标签页", {
      detail: JSON.stringify(tabs.map((tab) => ({ title: tab.title, url: tab.url }))),
      recommendation: "用「获取标签页」不加条件查看当前打开的全部页面"
    });
  }
  // 激活第一个匹配的标签页
  const isActive = String(args.isActive ?? args.is_active ?? "0") === "1";
  if (isActive && browser.switchTab) {
    const first = matched[0];
    await browser.switchTab(first.targetId ? { targetId: first.targetId } : { index: first.index });
  }
  ctx.log(`标签页匹配 ${matched.length}/${tabs.length} 个`, "info", node.id);
  return matched;
});

register("WebBrowser_Switch_V1", async (ctx, node, args) => {
  const browser = await currentSession(ctx);
  const tabs = (await browser.listTabs?.()) ?? [{ index: 0, targetId: "", title: "", url: await browser.currentUrl(), active: true }];
  const active = tabs.find((tab) => tab.active) ?? tabs[0];
  ctx.log(
    tabs.length <= 1 ? "运行浏览器为单窗口模式，当前即唯一标签页" : `已定位当前标签页（共 ${tabs.length} 个，可用「获取标签页」+匹配条件切换）`,
    "info",
    node.id
  );
  return { switched: true, index: active?.index ?? 0, url: active?.url ?? "", active: String(args.is_active ?? "1") === "1" };
});

register("WebBrowser_Maximize", async (ctx, node) => {
  const browser = await currentSession(ctx);
  browser.maximize?.();
  return true;
});

register("WebBrowser_Minimize", async (ctx, node) => {
  const browser = await currentSession(ctx);
  browser.minimize?.();
  return true;
});

register("WebBrowser_Stop", async (ctx, node) => {
  const browser = await currentSession(ctx);
  browser.stopLoading?.();
  return true;
});

register(["Element_ElementAarray", "Element_ElementCaptureSimilar"], async (ctx, node, args) => {
  const browser = await currentSession(ctx);
  const selector = args.uiSelector ?? args.selector ?? args.target;
  if (!selector) {
    throw new RuntimeError("validation_error", "元素选择器为空", { nodeId: node.id, componentId: node.componentId, recommendation: "请拾取或填写相似元素" });
  }
  const references = (await browser.getSimilarElements?.(selector, {
    start: Number.isFinite(Number(args.start_index)) ? Math.trunc(Number(args.start_index)) : 1,
    end: Number.isFinite(Number(args.end_index)) ? Math.trunc(Number(args.end_index)) : -1,
    reverse: String(args.reverse ?? "") === "1" || String(args.reverse ?? "") === "true"
  })) ?? [];
  ctx.log("已获取 " + references.length + " 个相似元素（数组）", "info", node.id);
  return references;
});

register("Element_StartAutoClosePopup", async (ctx, node) => {
  const browser = await currentSession(ctx);
  const started = browser.startAutoCloseDialogs?.();
  ctx.log(started ? "弹窗自动关闭已开启" : "弹窗自动关闭已在运行中", "info", node.id);
  return { active: true, started };
});

register("Element_StopAutoClosePopup", async (ctx, node) => {
  const browser = await currentSession(ctx);
  const stopped = browser.stopAutoCloseDialogs?.();
  ctx.log(stopped ? "弹窗自动关闭已停止" : "弹窗自动关闭未在运行", "info", node.id);
  return { active: false, stopped };
});

register(["Element_GetLineBarChartData", "Element_GetPieChartData"], async (ctx, node, args) => {
  const browser = await currentSession(ctx);
  const selector = String((typeof args.uiSelector === "object" && args.uiSelector !== null ? (args.uiSelector as { value?: string }).value : args.uiSelector) ?? "body").replace(/^css:/, "").trim() || "body";
  const script = "(function(){" +
    "if (!window.echarts) return [];" +
    "var sel = " + JSON.stringify(selector) + ";" +
    "var dom = document.querySelector(sel);" +
    "var inst = dom ? window.echarts.getInstanceByDom(dom) : null;" +
    "if (!inst) { var all = document.querySelectorAll('[_echarts_instance_]'); for (var i = 0; i < all.length; i++) { inst = window.echarts.getInstanceByDom(all[i]); if (inst) break; } }" +
    "if (!inst) return [];" +
    "var opt = inst.getOption(); var out = [];" +
    "(opt.series || []).forEach(function(s) { out.push({ name: s.name || '', type: s.type || '', data: s.data || [] }); });" +
    "return out;" +
    "})()";
  const data = await browser.runJs(script);
  ctx.log("已获取图表数据：" + JSON.stringify(data).slice(0, 120), "info", node.id);
  return data;
});