package Common

/*
Bridge.go - 统一桥接模块

将Config.go、Log.go、Output.go、Proxy.go的桥接功能合并到一个文件中，
减少文件数量，提高代码组织性。保持所有原有API的完全兼容性。
*/

import (
	"context"
	"crypto/tls"
	"fmt"
	"io"
	"log"
	"net"
	"sync"
	"time"

	"github.com/fatih/color"
	"github.com/schollz/progressbar/v3"

	"github.com/shadow1ng/fscan/Common/config"
	"github.com/shadow1ng/fscan/Common/logging"
	"github.com/shadow1ng/fscan/Common/output"
	"github.com/shadow1ng/fscan/Common/proxy"
)

// =============================================================================
// 配置桥接 (Config.go 功能)
// =============================================================================

var version = "2.0.2"

// 向后兼容的输出配置变量
var (
	Outputfile   string
	OutputFormat string
	ProgressBar  *progressbar.ProgressBar
	OutputMutex  sync.Mutex
)

// PocInfo POC详细信息结构
type PocInfo = config.PocInfo

func syncOutputConfig() {
	cfg := config.GetGlobalConfig()
	if cfg != nil && cfg.Output != nil {
		Outputfile = cfg.Output.Outputfile
		OutputFormat = cfg.Output.OutputFormat
	}
	ProgressBar = config.GetGlobalProgressBar()
}

// =============================================================================
// 日志桥接 (Log.go 功能)
// =============================================================================

// 全局日志状态和变量
var (
	status       = logging.NewScanStatus()
	Num, End     int64
	StartTime    = time.Now()
	globalLogger *logging.Logger
	loggerOnce   sync.Once
)

// 日志级别常量
const (
	LogLevelAll             = string(logging.LevelAll)
	LogLevelError           = string(logging.LevelError)
	LogLevelBase            = string(logging.LevelBase)
	LogLevelInfo            = string(logging.LevelInfo)
	LogLevelSuccess         = string(logging.LevelSuccess)
	LogLevelDebug           = string(logging.LevelDebug)
	LogLevelInfoSuccess     = string(logging.LevelInfoSuccess)
	LogLevelBaseInfoSuccess = string(logging.LevelBaseInfoSuccess)
)

// 类型别名
type LogEntry = logging.LogEntry
type ScanStatus = logging.ScanStatus
type ProgressDisplay = logging.ProgressDisplay

func getGlobalLogger() *logging.Logger {
	loggerOnce.Do(func() {
		config := &logging.LoggerConfig{
			Level: logging.LevelBaseInfoSuccess, EnableColor: !NoColor, SlowOutput: SlowLogOutput,
			ShowProgress: true, StartTime: StartTime,
			LevelColors: map[logging.LogLevel]color.Attribute{
				logging.LevelError: color.FgBlue, logging.LevelBase: color.FgYellow,
				logging.LevelInfo: color.FgGreen, logging.LevelSuccess: color.FgRed, logging.LevelDebug: color.FgWhite,
			},
		}
		globalLogger = logging.NewLogger(config)
		if ProgressBar != nil {
			globalLogger.SetProgressBar(ProgressBar)
		}
		globalLogger.SetOutputMutex(&OutputMutex)
		status = globalLogger.GetScanStatus()
	})
	return globalLogger
}

// 日志相关函数
func InitLogger()               { log.SetOutput(io.Discard); getGlobalLogger().Initialize() }
func LogDebug(msg string)       { getGlobalLogger().Debug(msg) }
func LogBase(msg string)        { getGlobalLogger().Base(msg) }
func LogInfo(msg string)        { getGlobalLogger().Info(msg) }
func LogSuccess(result string)  { getGlobalLogger().Success(result) }
func LogError(errMsg string)    { getGlobalLogger().Error(errMsg) }
func CheckErrs(err error) error { return logging.CheckErrs(err) }

// =============================================================================
// 输出桥接 (Output.go 功能)
// =============================================================================

// 全局输出管理器
var ResultOutput *OutputManager

type OutputManager struct{ manager *output.Manager }
type ResultType = output.ResultType

const (
	HOST    ResultType = output.TypeHost
	PORT    ResultType = output.TypePort
	SERVICE ResultType = output.TypeService
	VULN    ResultType = output.TypeVuln
)

type ScanResult = output.ScanResult

func createOutputManager(outputPath, outputFormat string) (*OutputManager, error) {
	var format output.OutputFormat
	switch outputFormat {
	case "txt":
		format = output.FormatTXT
	case "json":
		format = output.FormatJSON
	case "csv":
		format = output.FormatCSV
	default:
		return nil, fmt.Errorf(GetText("output_format_invalid", outputFormat))
	}

	config := output.DefaultManagerConfig(outputPath, format)
	manager, err := output.NewManager(config)
	if err != nil {
		return nil, err
	}
	return &OutputManager{manager: manager}, nil
}

// 输出相关函数
func InitOutput() error {
	LogDebug(GetText("output_init_start"))
	switch OutputFormat {
	case "txt", "json", "csv":
	default:
		return fmt.Errorf(GetText("output_format_invalid", OutputFormat))
	}
	if Outputfile == "" {
		return fmt.Errorf(GetText("output_path_empty"))
	}

	manager, err := createOutputManager(Outputfile, OutputFormat)
	if err != nil {
		LogDebug(GetText("output_init_failed", err))
		return fmt.Errorf(GetText("output_init_failed", err))
	}
	ResultOutput = manager
	output.SetGlobalManager(manager.manager)
	LogDebug(GetText("output_init_success"))
	return nil
}

func (om *OutputManager) saveResult(result *ScanResult) error {
	if om.manager == nil {
		return fmt.Errorf(GetText("output_not_init"))
	}
	LogDebug(GetText("output_saving_result", result.Type, result.Target))
	return om.manager.SaveResult(result)
}

func SaveResult(result *ScanResult) error {
	if ResultOutput == nil {
		LogDebug(GetText("output_not_init"))
		return fmt.Errorf(GetText("output_not_init"))
	}
	return ResultOutput.saveResult(result)
}

func CloseOutput() error {
	if ResultOutput == nil {
		return nil
	}
	LogDebug(GetText("output_closing"))
	err := ResultOutput.manager.Close()
	if err != nil {
		return fmt.Errorf(GetText("output_close_failed", err))
	}
	LogDebug(GetText("output_closed"))
	return nil
}

// =============================================================================
// 代理桥接 (Proxy.go 功能)
// =============================================================================

// 代理相关函数
func WrapperTcpWithTimeout(network, address string, timeout time.Duration) (net.Conn, error) {
	ctx, cancel := context.WithTimeout(context.Background(), timeout)
	defer cancel()
	return proxy.DialContextWithProxy(ctx, network, address)
}

func WrapperTcpWithContext(ctx context.Context, network, address string) (net.Conn, error) {
	return proxy.DialContextWithProxy(ctx, network, address)
}

func Socks5Dialer(forward *net.Dialer) (interface{}, error) {
	if err := syncProxyConfig(); err != nil {
		return nil, fmt.Errorf(GetText("socks5_create_failed", err))
	}
	manager := proxy.GetGlobalProxy()
	dialer, err := manager.GetDialer()
	if err != nil {
		return nil, fmt.Errorf(GetText("socks5_create_failed", err))
	}
	return dialer, nil
}

func WrapperTlsWithContext(ctx context.Context, network, address string, tlsConfig *tls.Config) (net.Conn, error) {
	if err := syncProxyConfig(); err != nil {
		LogError(GetText("proxy_config_sync_failed", err.Error()))
	}
	conn, err := proxy.DialTLSContextWithProxy(ctx, network, address, tlsConfig)
	if err != nil {
		LogError(GetText("tls_conn_failed", err.Error()))
		return nil, fmt.Errorf(GetText("tls_conn_failed", err))
	}
	return conn, nil
}

func syncProxyConfig() error {
	var proxyURL string
	if Socks5Proxy != "" {
		proxyURL = Socks5Proxy
	} else if HttpProxy != "" {
		proxyURL = HttpProxy
	}

	if proxy.IsProxyEnabledGlobally() {
		currentAddr := proxy.GetGlobalProxyAddress()
		if (proxyURL == "" && currentAddr == "") ||
			(proxyURL != "" && currentAddr != "" && (Socks5Proxy == currentAddr || HttpProxy == currentAddr)) {
			return nil
		}
	}

	if err := proxy.InitGlobalProxy(proxyURL); err != nil {
		return fmt.Errorf(GetText("proxy_init_failed", err))
	}

	if proxyURL != "" {
		LogBase(GetText("proxy_enabled", proxy.GetGlobalProxyType(), proxy.GetGlobalProxyAddress()))
	} else {
		LogBase(GetText("proxy_disabled"))
	}
	return nil
}

// =============================================================================
// 初始化函数
// =============================================================================

func init() {
	config.SetGlobalVersion(version)
	syncOutputConfig()
}