// Action routes — click/type/scroll/eval/wait/navigate + cookie management / 操作路由，点击/输入/滚动/执行/等待/导航 + Cookie 管理
import type { IncomingMessage, ServerResponse } from 'node:http';
import { BrowserManager } from '../browser-manager.js';
import { safeStringify } from '@visionl/core';

type RouteHandler = (req: IncomingMessage, res: ServerResponse) => boolean;

function readBody(req: IncomingMessage): Promise<string> {
  return new Promise((resolve) => {
    let body = '';
    req.on('data', (chunk) => { body += chunk; });
    req.on('end', () => resolve(body));
  });
}

export function actionRoutes(bm: BrowserManager): RouteHandler {
  return (req, res) => {
    const url = new URL(req.url || '/', 'http://localhost');
    const path = url.pathname;
    const segments = path.split('/').filter(Boolean);
    res.setHeader('Content-Type', 'application/json');

    // Only handle /pages/:id/* routes / 只处理 /pages/:id/* 路由
    if (segments[0] !== 'pages' || segments.length < 3) {
      return false;
    }

    const id = segments[1];
    const action = segments[2];

    const entry = bm.getPage(id);
    if (!entry) {
      res.writeHead(404);
      res.end(safeStringify({ ok: false, error: { code: 'PAGE_NOT_FOUND', message: `Page "${id}" not found` } }));
      return true;
    }

    // ========== POST actions / POST 操作 ==========

    // POST /pages/:id/click — click on a selector / 点击选择器
    if (req.method === 'POST' && action === 'click' && segments.length === 3) {
      readBody(req).then(async (body) => {
        try {
          const { selector } = JSON.parse(body);
          await entry.page.click(selector);
          res.writeHead(200);
          res.end(safeStringify({ ok: true, data: { success: true } }));
        } catch (err: any) {
          res.writeHead(500);
          res.end(safeStringify({ ok: false, error: { code: err.code || 'INTERNAL', message: err.message } }));
        }
      });
      return true;
    }

    // POST /pages/:id/type — fill text into a selector / 向选择器输入文本
    if (req.method === 'POST' && action === 'type' && segments.length === 3) {
      readBody(req).then(async (body) => {
        try {
          const { selector, text } = JSON.parse(body);
          await entry.page.fill(selector, text);
          res.writeHead(200);
          res.end(safeStringify({ ok: true, data: { success: true } }));
        } catch (err: any) {
          res.writeHead(500);
          res.end(safeStringify({ ok: false, error: { code: err.code || 'INTERNAL', message: err.message } }));
        }
      });
      return true;
    }

    // POST /pages/:id/scroll — scroll page by deltaY or to bottom / 滚动页面向下或到底部
    if (req.method === 'POST' && action === 'scroll' && segments.length === 3) {
      readBody(req).then(async (body) => {
        try {
          const { deltaY, toBottom } = JSON.parse(body);
          await entry.page.evaluate(({ deltaY: dy, toBottom: bottom }) => {
            if (bottom) {
              window.scrollTo(0, document.body.scrollHeight);
            } else {
              window.scrollBy(0, dy || 0);
            }
          }, { deltaY: deltaY || 0, toBottom });
          res.writeHead(200);
          res.end(safeStringify({ ok: true, data: { success: true } }));
        } catch (err: any) {
          res.writeHead(500);
          res.end(safeStringify({ ok: false, error: { code: err.code || 'INTERNAL', message: err.message } }));
        }
      });
      return true;
    }

    // POST /pages/:id/eval — evaluate JavaScript in page context / 在页面中执行 JavaScript
    if (req.method === 'POST' && action === 'eval' && segments.length === 3) {
      readBody(req).then(async (body) => {
        try {
          const { code } = JSON.parse(body);
          const result = await entry.page.evaluate(code);
          res.writeHead(200);
          res.end(safeStringify({ ok: true, data: { result } }));
        } catch (err: any) {
          res.writeHead(500);
          res.end(safeStringify({ ok: false, error: { code: err.code || 'INTERNAL', message: err.message } }));
        }
      });
      return true;
    }

    // POST /pages/:id/wait — wait for selector or timeout / 等待选择器出现或超时
    if (req.method === 'POST' && action === 'wait' && segments.length === 3) {
      readBody(req).then(async (body) => {
        try {
          const { selector, timeout } = JSON.parse(body);
          if (selector) {
            await entry.page.waitForSelector(selector, { timeout: timeout || 30000 });
          } else {
            await entry.page.waitForTimeout(timeout || 1000);
          }
          res.writeHead(200);
          res.end(safeStringify({ ok: true, data: { success: true } }));
        } catch (err: any) {
          res.writeHead(500);
          res.end(safeStringify({ ok: false, error: { code: err.code || 'INTERNAL', message: err.message } }));
        }
      });
      return true;
    }

    // POST /pages/:id/navigate — navigate page to a new URL / 导航到新 URL
    if (req.method === 'POST' && action === 'navigate' && segments.length === 3) {
      readBody(req).then(async (body) => {
        try {
          const { url: pageUrl } = JSON.parse(body);
          await entry.page.goto(pageUrl, { waitUntil: 'domcontentloaded' });
          const title = await entry.page.title();
          res.writeHead(200);
          res.end(safeStringify({ ok: true, data: { url: pageUrl, title } }));
        } catch (err: any) {
          res.writeHead(500);
          res.end(safeStringify({ ok: false, error: { code: err.code || 'INTERNAL', message: err.message } }));
        }
      });
      return true;
    }

    // ========== Cookie management / Cookie 管理 ==========

    // GET /pages/:id/cookies — get all cookies for the page context / 获取页面上下文的所有 cookie
    if (req.method === 'GET' && action === 'cookies' && segments.length === 3) {
      entry.context.cookies().then((cookies) => {
        res.writeHead(200);
        res.end(safeStringify({ ok: true, data: { cookies } }));
      }).catch((err: any) => {
        res.writeHead(500);
        res.end(safeStringify({ ok: false, error: { code: err.code || 'INTERNAL', message: err.message } }));
      });
      return true;
    }

    // POST /pages/:id/cookies — add a cookie to the page context / 向页面上下文添加 cookie
    if (req.method === 'POST' && action === 'cookies' && segments.length === 3) {
      readBody(req).then(async (body) => {
        try {
          const { name, value, domain, path: cookiePath, httpOnly, secure, sameSite } = JSON.parse(body);
          const cookie: any = { name, value };
          if (domain !== undefined) cookie.domain = domain;
          if (cookiePath !== undefined) cookie.path = cookiePath;
          if (httpOnly !== undefined) cookie.httpOnly = httpOnly;
          if (secure !== undefined) cookie.secure = secure;
          if (sameSite !== undefined) cookie.sameSite = sameSite;
          await entry.context.addCookies([cookie]);
          res.writeHead(200);
          res.end(safeStringify({ ok: true, data: { success: true } }));
        } catch (err: any) {
          res.writeHead(500);
          res.end(safeStringify({ ok: false, error: { code: err.code || 'INTERNAL', message: err.message } }));
        }
      });
      return true;
    }

    // DELETE /pages/:id/cookies/:name — delete a specific cookie by name / 按名称删除特定 cookie
    if (req.method === 'DELETE' && action === 'cookies' && segments.length === 4) {
      const cookieName = segments[3];
      Promise.resolve().then(async () => {
        try {
          const existingCookies = await entry.context.cookies();
          const filtered = existingCookies.filter((c) => c.name !== cookieName);
          await entry.context.clearCookies();
          if (filtered.length > 0) {
            await entry.context.addCookies(filtered);
          }
          res.writeHead(200);
          res.end(safeStringify({ ok: true, data: { success: true } }));
        } catch (err: any) {
          res.writeHead(500);
          res.end(safeStringify({ ok: false, error: { code: err.code || 'INTERNAL', message: err.message } }));
        }
      });
      return true;
    }

    return false;
  };
}