import { register } from "@rpa/core";
import { RuntimeError } from "@rpa/core";
import { browserSession, externalBrowserSession } from "../browser/session";
import type { BrowserLike, RunContext } from "@rpa/core";

async function session(ctx: RunContext): Promise<BrowserLike> {
  if (!ctx.browser) ctx.browser = await browserSession();
  return ctx.browser;
}

function isTruthyFlag(value: unknown): boolean {
  const text = String(value ?? "").trim().toLowerCase();
  return text === "1" || text === "true" || text === "yes";
}

/**
 * 「打开网页」浏览器选择：
 * - type 填 chrome / edge → 拉起本机对应浏览器（带独立 profile + 调试端口）并接管
 * - isRemote 填 1/true → 直连 ipAddress:port 上已监听调试端口的实例（不拉起进程）
 * - type 缺省或其他值 → 内置运行浏览器（现状行为，兜底）
 */
async function resolveSession(ctx: RunContext, args: Record<string, unknown>): Promise<{ browser: BrowserLike; label: string }> {
  if (ctx.browser) return { browser: ctx.browser, label: "" };
  const type = String(args.type ?? "").trim().toLowerCase();
  const isRemote = isTruthyFlag(args.isRemote);
  if (isRemote) {
    const host = String(args.ipAddress ?? "127.0.0.1");
    const port = Number(args.port ?? 9222);
    const browser = await externalBrowserSession({ mode: "remote", host, port });
    ctx.browser = browser;
    return { browser, label: browser.label };
  }
  if (type === "chrome" || type === "edge") {
    const extraArgs = String(args.arguments ?? "")
      .split(/\s+/)
      .map((item) => item.trim())
      .filter(Boolean);
    const browser = await externalBrowserSession({
      mode: "launch",
      browserType: type === "edge" ? "edge" : "chrome",
      port: Number(args.port ?? 9222) || 9222,
      extraArgs
    });
    ctx.browser = browser;
    return { browser, label: browser.label };
  }
  return { browser: await session(ctx), label: "内置运行浏览器" };
}

register(["WebBrowser_CreateV3", "WebBrowser_CreateV2", "WebBrowser_Create", "WebBrowser_CreateBackground"], async (ctx, node, args) => {
  const { browser, label } = await resolveSession(ctx, args);
  const url = String(args.url ?? "");
  if (url && String(args.openNewTab ?? "0") === "1" && browser.openNewTab) {
    const tab = await browser.openNewTab(url);
    ctx.log(`已使用${label}在新标签页打开 ${tab.url}`, "info", node.id);
    return { url: tab.url, title: tab.title };
  }
  if (url) {
    const result = await browser.navigate(url);
    ctx.log(`已使用${label}打开 ${result.url}`, "info", node.id);
    return result;
  }
  return { url: await browser.currentUrl(), title: "" };
});

function selectorOf(args: Record<string, unknown>): unknown {
  const selector = args.uiSelector ?? args.selector ?? args.target ?? args.uiWindowSelector;
  if (selector === undefined || selector === null || selector === "") {
    throw new RuntimeError("validation_error", "元素选择器为空", {
      recommendation: "填写 css:#id、text:提交、aria:button=提交 或使用拾取器"
    });
  }
  return selector;
}

register(["WebBrowser_GoUrl", "WebBrowser_Navigate"], async (ctx, node, args) => {
  const browser = await session(ctx);
  const url = String(args.url ?? "");
  if (!url) {
    throw new RuntimeError("validation_error", "跳转地址为空", {
      nodeId: node.id,
      componentId: node.componentId,
      recommendation: "填写要访问的 URL"
    });
  }
  const result = await browser.navigate(url);
  ctx.log(`已跳转 ${result.url}`, "info", node.id);
  return result;
});

register("WebBrowser_Switch", async (ctx, node, args) => {
  const browser = await session(ctx);
  const title = String(args.title ?? "").trim();
  const url = String(args.url ?? "").trim();
  if (browser.switchTab && (title || url)) {
    const tab = await browser.switchTab({ title: title || undefined, url: url || undefined });
    ctx.log(`已切换到标签页：${tab.title || tab.url}`, "info", node.id);
    return { switched: true, targetId: tab.targetId, title: tab.title, url: tab.url };
  }
  ctx.log("网页切换已由统一运行浏览器接管", "info", node.id);
  return true;
});

register("WebBrowser_Close", async (ctx) => {
  if (ctx.browser) await ctx.browser.close();
  ctx.browser = undefined;
  return true;
});

register(["Element_Click_V6", "Element_Click_V3", "Element_Click"], async (ctx, node, args) => {
  const browser = await session(ctx);
  const result = await browser.click(selectorOf(args));
  ctx.log(`已点击 ${(result as { selector?: string }).selector || ""}`, "info", node.id);
  return result;
});

register(["Element_SetValue_V6", "Element_SetValue_V4", "Element_SetValue"], async (ctx, node, args) => {
  const browser = await session(ctx);
  const text = String(args.text ?? args.value ?? "");
  const result = await browser.type(selectorOf(args), text, true);
  ctx.log(`已输入 ${text.length > 40 ? `${text.slice(0, 40)}…` : text}`, "info", node.id);
  if (String(args.isEnter ?? "0") === "1" || String(args.isEnter) === "true") {
    await browser.runJs("document.activeElement && document.activeElement.blur()");
  }
  return result;
});

register(["Element_GetText_V5", "Element_GetText"], async (ctx, node, args) => {
  const browser = await session(ctx);
  const attrType = String(args.attr_type ?? "");
  const attrName = String(args.attr_name ?? "");
  const attribute = attrType && attrType !== "default" ? attrName || attrType : undefined;
  const text = await browser.getText(selectorOf(args), attribute);
  ctx.log(`读取到 ${text.length > 60 ? `${text.slice(0, 60)}…` : text}`, "info", node.id);
  return text;
});

register(["Element_Exists", "Element_ElementExists"], async (ctx, node, args) => {
  const browser = await session(ctx);
  const exists = await browser.exists(selectorOf(args));
  ctx.log(exists ? "元素存在" : "元素不存在", "info", node.id);
  return exists;
});

register(["Element_SelectOperation_v1", "Element_SelectOperation"], async (ctx, node, args) => {
  const browser = await session(ctx);
  const value = String(args.itemsToSelect ?? args.choose ?? args.value ?? "");
  const result = await browser.select(selectorOf(args), value);
  ctx.log(`已选择 ${value}`, "info", node.id);
  return result;
});

register([
  "WebBrowser_RunJs", "WebBrowser_RunJsInIeByTitle", "WebBrowser_RunJsInIeBySelector",
  "WebBrowser_RunJsInIeBySelector_v1", "WebBrowser_RunJsInIeBySelector_v2", "WebBrowser_RunJsInIeBySelector_v3",
  "WebBrowser_RunJsInIeBySelectorGround"
], async (ctx, node, args) => {
  const browser = await session(ctx);
  const script = String(args.jsCode ?? args.script ?? args.code ?? "");
  if (!script) throw new RuntimeError("validation_error", "JS 代码为空", { nodeId: node.id, componentId: node.componentId });
  return browser.runJs(script);
});

register(["WebBrowser_SaveAs", "WebBrowser_SaveAs_V1"], async (ctx, node, args) => {
  const browser = await session(ctx);
  const folder = String(args.path ?? "");
  if (!folder) throw new RuntimeError("validation_error", "下载保存目录为空", { nodeId: node.id, componentId: node.componentId });
  const file = await browser.download(selectorOf(args), folder, String(args.filename ?? ""), Number(args.timeout ?? 10000));
  ctx.log(`文件已下载 ${file}`, "info", node.id);
  return file;
});

register("WebBrowser_Screenshot", async (ctx, node, args) => {
  const browser = await session(ctx);
  const target = String(args.file_path ?? args.image_path ?? `${ctx.evidenceDir}/${node.id}.png`);
  const file = await browser.screenshot(target);
  ctx.log(`截图已保存 ${file}`, "info", node.id);
  return file;
});

// Image_Screenshot 统一在 vision.ts 实现（屏幕/文件来源 + 区域裁剪），此处不再重复注册