package neo4j

import (
	"context"
	"fmt"
	"strings"

	"github.com/shadow1ng/fscan/common"
	"github.com/shadow1ng/fscan/common/i18n"
	"github.com/shadow1ng/fscan/plugins/base"
)

// Neo4jPlugin Neo4j插件实现
type Neo4jPlugin struct {
	*base.ServicePlugin
	exploiter *Neo4jExploiter
}

// NewNeo4jPlugin 创建Neo4j插件
func NewNeo4jPlugin() *Neo4jPlugin {
	// 插件元数据
	metadata := &base.PluginMetadata{
		Name:        "neo4j",
		Version:     "2.0.0",
		Author:      "fscan-team",
		Description: "Neo4j图数据库扫描和利用插件",
		Category:    "service",
		Ports:       []int{7474, 7687}, // Neo4j HTTP端口和Bolt端口
		Protocols:   []string{"tcp", "bolt"},
		Tags:        []string{"neo4j", "graph-database", "database", "weak-password", "unauthorized"},
	}
	
	// 创建连接器和服务插件
	connector := NewNeo4jConnector()
	servicePlugin := base.NewServicePlugin(metadata, connector)
	
	// 创建Neo4j插件
	plugin := &Neo4jPlugin{
		ServicePlugin: servicePlugin,
		exploiter:     NewNeo4jExploiter(),
	}
	
	// 设置能力
	plugin.SetCapabilities([]base.Capability{
		base.CapWeakPassword,
		base.CapUnauthorized,
		base.CapDataExtraction,
	})
	
	return plugin
}

// Scan 重写扫描方法，进行Neo4j服务扫描
func (p *Neo4jPlugin) Scan(ctx context.Context, info *common.HostInfo) (*base.ScanResult, error) {
	// 如果禁用了暴力破解，只进行服务识别
	if common.DisableBrute {
		return p.performServiceIdentification(ctx, info)
	}
	
	target := fmt.Sprintf("%s:%s", info.Host, info.Ports)
	
	// 先检查未授权访问
	unauthCred := &base.Credential{Username: "", Password: ""}
	result, err := p.ScanCredential(ctx, info, unauthCred)
	if err == nil && result.Success {
		// 未授权访问成功
		common.LogSuccess(i18n.GetText("neo4j_unauth_access", target))
		
		return &base.ScanResult{
			Success:     true,
			Service:     "Neo4j",
			Credentials: []*base.Credential{unauthCred},
			Banner:      result.Banner,
			Extra: map[string]interface{}{
				"service":      "Neo4j",
				"port":         info.Ports,
				"unauthorized": true,
				"access_type":  "no_authentication",
			},
		}, nil
	}
	
	// 检查默认凭据
	defaultCred := &base.Credential{Username: "neo4j", Password: "neo4j"}
	result, err = p.ScanCredential(ctx, info, defaultCred)
	if err == nil && result.Success {
		// 默认凭据成功
		common.LogSuccess(i18n.GetText("neo4j_default_creds", target, defaultCred.Username, defaultCred.Password))
		
		return &base.ScanResult{
			Success:     true,
			Service:     "Neo4j",
			Credentials: []*base.Credential{defaultCred},
			Banner:      result.Banner,
			Extra: map[string]interface{}{
				"service":  "Neo4j",
				"port":     info.Ports,
				"username": defaultCred.Username,
				"password": defaultCred.Password,
				"type":     "default-credentials",
			},
		}, nil
	}
	
	// 生成凭据进行暴力破解
	credentials := p.generateCredentials()
	
	// 遍历凭据进行测试
	for _, cred := range credentials {
		result, err := p.ScanCredential(ctx, info, cred)
		if err == nil && result.Success {
			// 认证成功
			common.LogSuccess(i18n.GetText("neo4j_auth_success", target, cred.Username, cred.Password))
			
			return &base.ScanResult{
				Success:     true,
				Service:     "Neo4j",
				Credentials: []*base.Credential{cred},
				Banner:      result.Banner,
				Extra: map[string]interface{}{
					"service":  "Neo4j",
					"port":     info.Ports,
					"username": cred.Username,
					"password": cred.Password,
					"type":     "weak-password",
				},
			}, nil
		}
	}
	
	// 所有凭据都失败，但可能识别到了Neo4j服务
	return p.performServiceIdentification(ctx, info)
}

// generateCredentials 生成Neo4j凭据
func (p *Neo4jPlugin) generateCredentials() []*base.Credential {
	var credentials []*base.Credential
	
	// 获取Neo4j用户名字典
	usernames := common.Userdict["neo4j"]
	if len(usernames) == 0 {
		usernames = []string{"neo4j", "admin", "administrator", "root"}
	}
	
	// 获取密码字典
	passwords := common.Passwords
	if len(passwords) == 0 {
		passwords = []string{"", "neo4j", "admin", "password", "123456", "root"}
	}
	
	// 生成用户名密码组合
	for _, username := range usernames {
		for _, password := range passwords {
			// 替换密码中的用户名占位符
			actualPassword := strings.Replace(password, "{user}", username, -1)
			
			credentials = append(credentials, &base.Credential{
				Username: username,
				Password: actualPassword,
			})
		}
	}
	
	return credentials
}

// Exploit 使用exploiter执行利用
func (p *Neo4jPlugin) Exploit(ctx context.Context, info *common.HostInfo, creds *base.Credential) (*base.ExploitResult, error) {
	return p.exploiter.Exploit(ctx, info, creds)
}

// GetExploitMethods 获取利用方法
func (p *Neo4jPlugin) GetExploitMethods() []base.ExploitMethod {
	return p.exploiter.GetExploitMethods()
}

// IsExploitSupported 检查利用支持
func (p *Neo4jPlugin) IsExploitSupported(method base.ExploitType) bool {
	return p.exploiter.IsExploitSupported(method)
}

// performServiceIdentification 执行Neo4j服务识别（-nobr模式）
func (p *Neo4jPlugin) performServiceIdentification(ctx context.Context, info *common.HostInfo) (*base.ScanResult, error) {
	target := fmt.Sprintf("%s:%s", info.Host, info.Ports)
	
	// 尝试识别Neo4j服务
	connector := NewNeo4jConnector()
	conn, err := connector.Connect(ctx, info)
	
	if err == nil && conn != nil {
		if neo4jConn, ok := conn.(*Neo4jConnection); ok {
			// 记录服务识别成功
			common.LogSuccess(i18n.GetText("neo4j_service_identified", target, neo4jConn.info))
			
			connector.Close(conn)
			return &base.ScanResult{
				Success: true,
				Service: "Neo4j",
				Banner:  neo4jConn.info,
				Extra: map[string]interface{}{
					"service": "Neo4j",
					"port":    info.Ports,
					"info":    neo4jConn.info,
				},
			}, nil
		}
	}
	
	// 如果无法识别为Neo4j，返回失败
	return &base.ScanResult{
		Success: false,
		Error:   fmt.Errorf("无法识别为Neo4j服务"),
	}, nil
}

// =============================================================================
// 插件注册
// =============================================================================

// RegisterNeo4jPlugin 注册Neo4j插件
func RegisterNeo4jPlugin() {
	factory := base.NewSimplePluginFactory(
		&base.PluginMetadata{
			Name:        "neo4j",
			Version:     "2.0.0",
			Author:      "fscan-team",
			Description: "Neo4j图数据库扫描和利用插件",
			Category:    "service",
			Ports:       []int{7474, 7687}, // Neo4j HTTP端口和Bolt端口
			Protocols:   []string{"tcp", "bolt"},
			Tags:        []string{"neo4j", "graph-database", "database", "weak-password", "unauthorized"},
		},
		func() base.Plugin {
			return NewNeo4jPlugin()
		},
	)
	
	base.GlobalPluginRegistry.Register("neo4j", factory)
}

// 自动注册
func init() {
	RegisterNeo4jPlugin()
}