package http

import (
	"fmt"
	"os"
	"path/filepath"
	"runtime"
	"strings"
	"sync"

	"apigo.cc/gojs"
	"apigo.cc/gojs/goja"
	"github.com/go-rod/rod"
	"github.com/go-rod/rod/lib/launcher"
	"github.com/go-rod/rod/lib/launcher/flags"
	"github.com/ssgo/u"
	"github.com/ysmood/fetchup"
)

type Chrome struct {
	id         string
	chromeURL  string
	chromePath string
	launcher   *launcher.Launcher
	browser    *rod.Browser
}

var chromes = map[string]*Chrome{}
var chromesLock sync.Mutex

func (ch *Chrome) Close(vm *goja.Runtime) {
	// logger := gojs.GetLogger(vm)
	if ch.browser != nil {
		// ver, _ := ch.browser.Version()
		// logger.Info("关闭Chrome浏览器", "id", ch.id, "browser", ver.Product, "userAgent", ver.UserAgent, "chromeURL", ch.chromeURL, "chromePath", ch.chromePath)
		ch.browser.Close()
		ch.browser = nil
	}
	if ch.launcher != nil {
		ch.launcher.Cleanup()
		ch.launcher = nil
	}

	chromesLock.Lock()
	delete(chromes, ch.id)
	chromesLock.Unlock()
}

func CloseAllChrome(vm *goja.Runtime) {
	n := len(chromes)
	if n > 0 {
		for _, ch := range chromes {
			ch.Close(vm)
		}
		logger := gojs.GetLogger(vm)
		logger.Info("关闭所有未主动关闭的Chrome浏览器", "count", n)
	}
}

type ChromeInfo struct {
	ProtocolVersion string
	Product         string
	Revision        string
	UserAgent       string
	JsVersion       string
	ChromeURL       string
	ChromePath      string
}

type ChromeOption struct {
	ChromeURL            string
	ChromePath           string
	ChromeDownloadMirror string
	ChromeDownloadPath   string
	ChromeOption         []string
	ShowWindow           bool
	HttpProxy            string
	UserAgent            string
}

func (ch *Chrome) Info(showWindow *bool, vm *goja.Runtime) (ChromeInfo, error) {
	ver, err := ch.browser.Version()
	if err != nil {
		return ChromeInfo{
			ChromeURL:  ch.chromeURL,
			ChromePath: ch.chromePath,
		}, err
	}
	return ChromeInfo{
		ProtocolVersion: ver.ProtocolVersion,
		Product:         ver.Product,
		Revision:        ver.Revision,
		UserAgent:       ver.UserAgent,
		JsVersion:       ver.JsVersion,
		ChromeURL:       ch.chromeURL,
		ChromePath:      ch.chromePath,
	}, nil
}

var hostConf = map[string]struct {
	urlPrefix string
	zipName   string
}{
	"darwin_amd64":  {"Mac", "chrome-mac.zip"},
	"darwin_arm64":  {"Mac_Arm", "chrome-mac.zip"},
	"linux_amd64":   {"Linux_x64", "chrome-linux.zip"},
	"windows_386":   {"Win", "chrome-win.zip"},
	"windows_amd64": {"Win_x64", "chrome-win.zip"},
}[runtime.GOOS+"_"+runtime.GOARCH]

func StartChrome(opt *ChromeOption, vm *goja.Runtime) (*Chrome, error) {
	if opt == nil {
		opt = &ChromeOption{}
	}
	if opt.ChromeURL == "" {
		opt.ChromeURL = conf.ChromeURL
	}
	if opt.ChromePath == "" {
		opt.ChromePath = conf.ChromePath
	}
	if opt.ChromeDownloadMirror == "" {
		opt.ChromeDownloadMirror = conf.ChromeDownloadMirror
	}
	if opt.ChromeDownloadPath == "" {
		opt.ChromeDownloadPath = conf.ChromeDownloadPath
	}
	if opt.HttpProxy == "" {
		opt.HttpProxy = conf.HttpProxy
	}
	if opt.UserAgent == "" {
		opt.UserAgent = conf.UserAgent
	}
	if opt.ChromeOption == nil {
		opt.ChromeOption = conf.ChromeOption
	}
	// logger := gojs.GetLogger(vm)
	ch := &Chrome{}
	ch.id = u.UniqueId()
	ch.browser = rod.New()
	ch.chromeURL = opt.ChromeURL
	if opt.ChromeURL == "" {
		// 使用本地Chrome
		ch.launcher = launcher.New()
		if opt.ChromePath != "" {
			ch.launcher.Bin(opt.ChromePath)
			ch.chromePath = opt.ChromePath
		} else if path, has := launcher.LookPath(); has {
			ch.launcher.Bin(path)
			ch.chromePath = path
		} else {
			// 自动下载Chrome
			lb := launcher.NewBrowser()

			// 默认优先级：淘宝(NPM) -> Playwright -> Google
			lb.Hosts = []launcher.Host{launcher.HostNPM, launcher.HostPlaywright, launcher.HostGoogle}

			if opt.ChromeDownloadMirror != "" {
				// 定义私有镜像 Host 函数
				var customHost launcher.Host = func(rev int) string {
					// 构造逻辑完全对齐 rod 官方：Prefix/OS_Arch/Revision/ZipName
					return fmt.Sprintf("%s/%s/%d/%s",
						strings.TrimSuffix(opt.ChromeDownloadMirror, "/"), // 去掉末尾的斜杠，防止拼接出双斜杠
						hostConf.urlPrefix,
						rev,
						hostConf.zipName,
					)
				}
				// 将自定义镜像插入到最前面
				lb.Hosts = append([]launcher.Host{customHost}, lb.Hosts...)
			}

			var path string
			var err error

			// --- 核心修改区：只有指定了路径才走手动逻辑 ---
			if opt.ChromeDownloadPath != "" {
				rev := lb.Revision

				// 构造存放目录和最终二进制路径
				destDir := filepath.Join(opt.ChromeDownloadPath, fmt.Sprintf("chromium-%d", rev))
				var binPath string
				switch runtime.GOOS {
				case "darwin": // macOS
					binPath = filepath.Join(destDir, "Chromium.app/Contents/MacOS/Chromium")
				case "windows": // Windows
					binPath = filepath.Join(destDir, "chrome.exe")
				default: // linux
					binPath = filepath.Join(destDir, "chrome")
				}

				// --- 检查本地是否存在 (实现跳过下载) ---
				if _, err = os.Stat(binPath); err == nil {
					path = binPath
				} else {
					// --- 手动触发 fetchup 下载流程 ---
					urls := []string{}
					for _, host := range lb.Hosts {
						urls = append(urls, host(rev))
					}

					// 使用你发现的 fetchup 逻辑，直接下载到指定的 destDir
					fu := fetchup.New(destDir, urls...)
					// 如果你设置了代理，也可以传给 fu.HttpClient
					err = fu.Fetch()
					if err == nil {
						// 自动处理解压后的目录层级缩减
						_ = fetchup.StripFirstDir(destDir)
						path = binPath
						// 修正 Linux 权限
						if runtime.GOOS != "windows" {
							_ = os.Chmod(path, 0755)
						}
					}
				}
			} else {
				// 如果没有指定自定义路径，直接走 Rod 默认逻辑（会走 ENV 和默认缓存）
				path, err = lb.Get()
			}

			if err != nil {
				ch.Close(vm)
				return nil, gojs.Err(fmt.Errorf("自动下载浏览器失败: %w", err))
			}

			ch.launcher.Bin(path)
			ch.chromePath = path
		}

		// 基础防御参数
		ch.launcher.
			Set("disable-dev-shm-usage").
			Set("single-process"). // 保留你原有的逻辑
			Set("disable-blink-features", "AutomationControlled").
			Set("no-sandbox").
			Set("disable-infobars").
			Delete("enable-automation") // 彻底删除自动化控制标志

		// --- 动态 Headless 逻辑 ---
		if opt.ShowWindow {
			ch.launcher.Headless(false)
		} else {
			// 使用新版无头模式，不要调用 .Headless(true)
			ch.launcher.Set("headless", "new")
		}

		// --- 动态 User-Agent 优化 ---
		if opt.UserAgent != "" {
			ch.launcher.Set("user-agent", opt.UserAgent)
		} else {
			// 建议版本号保持在 130+，目前 146 有点过于领先（当前稳定版大约在 134 左右）
			const chromeVersion = "134.0.0.0"
			switch runtime.GOOS {
			case "darwin": // macOS
				ch.launcher.Set("user-agent", fmt.Sprintf("Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/%s Safari/537.36", chromeVersion))
			case "linux":
				// 建议 Linux 下还是用 Linux 的 UA，减少被识别为“伪装者”的风险
				ch.launcher.Set("user-agent", fmt.Sprintf("Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/%s Safari/537.36", chromeVersion))
			default: // windows
				ch.launcher.Set("user-agent", fmt.Sprintf("Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/%s Safari/537.36", chromeVersion))
			}
		}

		if opt.HttpProxy != "" {
			ch.launcher.Proxy(opt.HttpProxy)
		}

		// 操作系统特定兼容
		switch runtime.GOOS {
		case "linux":
			ch.launcher.Set("disable-setuid-sandbox")
		case "windows":
			ch.launcher.Set("disable-features=RendererCodeIntegrity")
		}

		if opt.ChromeOption != nil {
			for _, opt := range opt.ChromeOption {
				a := u.SplitTrimN(opt, "=", 2)
				if len(a) == 2 {
					ch.launcher.Set(flags.Flag(a[0]), a[1])
				} else {
					ch.launcher.Set(flags.Flag(opt))
				}
			}
		}
		if localChromeURL, err := ch.launcher.Launch(); err != nil {
			ch.Close(vm)
			return nil, gojs.Err(err)
		} else {
			ch.chromeURL = localChromeURL
			if ch.chromePath == "" {
				ch.chromePath = ch.launcher.Get(flags.Bin)
			}
		}
	}

	ch.browser.ControlURL(ch.chromeURL)
	if err := ch.browser.Connect(); err != nil {
		return nil, gojs.Err(err)
	}
	// ver, _ := ch.browser.Version()
	// logger.Info("启动Chrome浏览器", "id", ch.id, "browser", ver.Product, "userAgent", ver.UserAgent, "chromeURL", ch.chromeURL, "chromePath", ch.chromePath)

	chromesLock.Lock()
	chromes[ch.id] = ch
	chromesLock.Unlock()
	return ch, nil
}