import Foundation
import UIKit

// MARK: - vCard版本转换工具
struct VCardConverter {
    
    /// 将vCard 2.1格式转换为3.0格式
    static func convertVCard21To30(_ vcard21: String) -> String {
        let lines = vcard21.components(separatedBy: .newlines)
        var vcard30 = "BEGIN:VCARD\nVERSION:3.0\n"
        
        for line in lines {
            let trimmedLine = line.trimmingCharacters(in: .whitespaces)
            if trimmedLine.isEmpty || trimmedLine.hasPrefix("BEGIN:") || trimmedLine.hasPrefix("VERSION:") || trimmedLine.hasPrefix("END:") {
                continue
            }
            
            // 处理N字段 (姓名)
            if trimmedLine.hasPrefix("N:") {
                let nameValue = String(trimmedLine.dropFirst(2))
                let nameParts = nameValue.components(separatedBy: ";")
                if nameParts.count >= 2 {
                    let lastName = nameParts[0]
                    let firstName = nameParts[1]
                    vcard30 += "N:\(lastName);\(firstName);;;\n"
                    vcard30 += "FN:\(firstName) \(lastName)\n"
                }
            }
            // 处理TEL字段 (电话)
            else if trimmedLine.hasPrefix("TEL") {
                let telValue = String(trimmedLine.dropFirst(3))
                if telValue.hasPrefix(";TYPE=") {
                    let typeStart = telValue.firstIndex(of: "=")!
                    let typeEnd = telValue.firstIndex(of: ":") ?? telValue.endIndex
                    let type = String(telValue[telValue.index(after: typeStart)..<typeEnd])
                    let number = String(telValue[telValue.index(after: typeEnd)...])
                    vcard30 += "TEL;TYPE=\(type):\(number)\n"
                } else if telValue.hasPrefix(":") {
                    let number = String(telValue.dropFirst())
                    vcard30 += "TEL:\(number)\n"
                }
            }
            // 处理EMAIL字段 (邮箱)
            else if trimmedLine.hasPrefix("EMAIL") {
                let emailValue = String(trimmedLine.dropFirst(5))
                if emailValue.hasPrefix(";TYPE=") {
                    let typeStart = emailValue.firstIndex(of: "=")!
                    let typeEnd = emailValue.firstIndex(of: ":") ?? emailValue.endIndex
                    let type = String(emailValue[emailValue.index(after: typeStart)..<typeEnd])
                    let email = String(emailValue[emailValue.index(after: typeEnd)...])
                    vcard30 += "EMAIL;TYPE=\(type):\(email)\n"
                } else if emailValue.hasPrefix(":") {
                    let email = String(emailValue.dropFirst())
                    vcard30 += "EMAIL:\(email)\n"
                }
            }
            // 处理ADR字段 (地址)
            else if trimmedLine.hasPrefix("ADR") {
                let adrValue = String(trimmedLine.dropFirst(3))
                if adrValue.hasPrefix(";TYPE=") {
                    let typeStart = adrValue.firstIndex(of: "=")!
                    let typeEnd = adrValue.firstIndex(of: ":") ?? adrValue.endIndex
                    let type = String(adrValue[adrValue.index(after: typeStart)..<typeEnd])
                    let address = String(adrValue[adrValue.index(after: typeEnd)...])
                    vcard30 += "ADR;TYPE=\(type):\(address)\n"
                } else if adrValue.hasPrefix(":") {
                    let address = String(adrValue.dropFirst())
                    vcard30 += "ADR:\(address)\n"
                }
            }
            // 处理其他字段
            else if trimmedLine.contains(":") {
                let colonIndex = trimmedLine.firstIndex(of: ":")!
                let fieldName = String(trimmedLine[..<colonIndex])
                let fieldValue = String(trimmedLine[trimmedLine.index(after: colonIndex)...])
                
                // 跳过已处理的字段
                if !["N", "TEL", "EMAIL", "ADR"].contains(fieldName) {
                    vcard30 += "\(fieldName):\(fieldValue)\n"
                }
            }
        }
        
        vcard30 += "END:VCARD"
        return vcard30
    }
    
    /// 检测vCard版本
    static func detectVCardVersion(_ vcard: String) -> String {
        let lines = vcard.components(separatedBy: .newlines)
        for line in lines {
            if line.hasPrefix("VERSION:") {
                return String(line.dropFirst(8))
            }
        }
        return "3.0" // 默认版本
    }
    
    /// 标准化vCard为3.0版本
    static func normalizeVCard(_ vcard: String) -> String {
        let version = detectVCardVersion(vcard)
        if version == "2.1" {
            return convertVCard21To30(vcard)
        }
        return vcard
    }
    
    /// 测试vCard版本转换功能
    static func testVCardConversion() {
        let vcard21 = """
        BEGIN:VCARD
        VERSION:2.1
        N:Surname;Givenname;;;
        FN:Givenname Surname
        TEL;TYPE=WORK:123-456-7890
        EMAIL;TYPE=PREF:test@example.com
        END:VCARD
        """
        
        let converted = convertVCard21To30(vcard21)
        print("Original vCard 2.1:")
        print(vcard21)
        print("\nConverted to vCard 3.0:")
        print(converted)
    }
}

// MARK: - 二维码解析器
class QRCodeParser {
    
    // MARK: - 解析二维码内容
    static func parseQRCode(_ content: String) -> ParsedQRData {
        let trimmedContent = content.trimmingCharacters(in: .whitespacesAndNewlines)
        
        // Wi-Fi
        if trimmedContent.uppercased().hasPrefix("WIFI:") {
            return parseWiFi(trimmedContent)
        }
        
        // Email
        if trimmedContent.lowercased().hasPrefix("mailto:") {
            return parseEmail(trimmedContent)
        }
        
        // Phone
        if trimmedContent.lowercased().hasPrefix("tel:") {
            return parsePhone(trimmedContent)
        }
        
        // SMS
        if trimmedContent.uppercased().hasPrefix("SMSTO:") {
            return parseSMS(trimmedContent)
        }
        
        // vCard
        if trimmedContent.uppercased().hasPrefix("BEGIN:VCARD") {
            return parseVCard(trimmedContent)
        }
        
        // MeCard
        if trimmedContent.uppercased().hasPrefix("MECARD:") {
            return parseMeCard(trimmedContent)
        }
        
        // Calendar
        if trimmedContent.uppercased().hasPrefix("BEGIN:VEVENT") {
            return parseCalendar(trimmedContent)
        }
        
        // Instagram
        if trimmedContent.lowercased().hasPrefix("instagram://user?username=") {
            return parseInstagram(trimmedContent)
        }
        
        // Facebook
        if trimmedContent.lowercased().hasPrefix("fb://profile/") {
            return parseFacebook(trimmedContent)
        }
        
        // Spotify
        if trimmedContent.lowercased().hasPrefix("spotify:search:") {
            return parseSpotify(trimmedContent)
        }
        
        // X (Twitter)
        if trimmedContent.lowercased().hasPrefix("twitter://user?screen_name=") || trimmedContent.lowercased().contains("x.com") || trimmedContent.lowercased().contains("twitter.com") {
            return parseTwitter(trimmedContent)
        }
        
        // WhatsApp
        if trimmedContent.lowercased().hasPrefix("whatsapp://send?phone=") {
            return parseWhatsApp(trimmedContent)
        }
        
        // Viber
        if trimmedContent.lowercased().hasPrefix("viber://add?number=") {
            return parseViber(trimmedContent)
        }
        
        // Snapchat
        if trimmedContent.lowercased().hasPrefix("snapchat://") {
            return parseSnapchat(trimmedContent)
        }
        
        // TikTok
        if trimmedContent.lowercased().contains("tiktok.com") || trimmedContent.lowercased().contains("www.tiktok.com") {
            return parseTikTok(trimmedContent)
        }
        
        // URL (检查是否为有效的URL)
        if isValidURL(trimmedContent) {
            return parseURL(trimmedContent)
        }
        
        // Location
        if trimmedContent.lowercased().hasPrefix("geo:") {
            return parseLocation(trimmedContent)
        }
        
        // 默认为文本类型
        return ParsedQRData(
            type: .text,
            title: "text_information".localized,
            subtitle: trimmedContent.count > 50 ? String(trimmedContent.prefix(50)) + "..." : trimmedContent,
            icon: "text.quote"
        )
    }
    
    // MARK: - 解析Wi-Fi
    private static func parseWiFi(_ content: String) -> ParsedQRData {
        let wifiInfo = content.replacingOccurrences(of: "WIFI:", with: "", options: .caseInsensitive)
        let components = wifiInfo.components(separatedBy: ";")
        
        var ssid = ""
        var password = ""
        var encryption = "WPA"
        
        for component in components {
            if component.uppercased().hasPrefix("S:") {
                ssid = String(component.dropFirst(2))
            } else if component.uppercased().hasPrefix("P:") {
                password = String(component.dropFirst(2))
            } else if component.uppercased().hasPrefix("T:") {
                encryption = String(component.dropFirst(2))
            }
        }
        
        let title = "wifi_network".localized
        let subtitle = String(format: "wifi_network_info".localized, ssid, encryption, password)
        
        // 存储WiFi详细信息到额外数据中
        let wifiDetails = WiFiDetails(ssid: ssid, password: password, encryption: encryption)
        let extraData = try? JSONEncoder().encode(wifiDetails)
        
        return ParsedQRData(
            type: .wifi,
            title: title,
            subtitle: subtitle,
            icon: "wifi",
            extraData: extraData
        )
    }
    
    // MARK: - 解析Email
    private static func parseEmail(_ content: String) -> ParsedQRData {
        let emailInfo = content.replacingOccurrences(of: "mailto:", with: "", options: .caseInsensitive)
        let components = emailInfo.components(separatedBy: "?")
        
        let emailAddress = components.first ?? ""
        var subject = ""
        var body = ""
        
        // 解析查询参数
        if components.count > 1 {
            let queryString = components[1]
            let queryParams = queryString.components(separatedBy: "&")
            
            for param in queryParams {
                let keyValue = param.components(separatedBy: "=")
                if keyValue.count == 2 {
                    let key = keyValue[0].lowercased()
                    let value = keyValue[1].removingPercentEncoding ?? keyValue[1]
                    
                    if key == "subject" {
                        subject = value
                    } else if key == "body" {
                        body = value
                    }
                }
            }
        }
        
        // 格式化显示信息
        var subtitle = emailAddress
        if !subject.isEmpty {
            subtitle += String(format: "\n主题: %@", subject)
        }
        if !body.isEmpty {
            let truncatedBody = body.count > 100 ? String(body.prefix(100)) + "..." : body
            subtitle += String(format: "\n内容: %@", truncatedBody)
        }
        
        // 存储Email详细信息到额外数据中
        let emailDetails = EmailDetails(emailAddress: emailAddress, subject: subject, body: body)
        let extraData = try? JSONEncoder().encode(emailDetails)
        
        return ParsedQRData(
            type: .mail,
            title: "email_address".localized,
            subtitle: subtitle,
            icon: "envelope",
            extraData: extraData
        )
    }
    
    // MARK: - 解析Phone
    private static func parsePhone(_ content: String) -> ParsedQRData {
        let phone = content.replacingOccurrences(of: "tel:", with: "", options: .caseInsensitive)
        
        return ParsedQRData(
            type: .phone,
            title: "phone_number".localized,
            subtitle: phone,
            icon: "phone"
        )
    }
    
    // MARK: - 解析SMS
    private static func parseSMS(_ content: String) -> ParsedQRData {
        let smsInfo = content.replacingOccurrences(of: "SMSTO:", with: "", options: .caseInsensitive)
        let components = smsInfo.components(separatedBy: ":")
        
        let phone = components.first?.trimmingCharacters(in: .whitespaces) ?? ""
        let message = components.count > 1 ? components[1].trimmingCharacters(in: .whitespaces) : ""
        
        let title = "sms".localized
        var subtitle = ""
        
        // 构建更美观的副标题
        if !phone.isEmpty {
            subtitle += String(format: "📱 %@", phone)
        }
        
        if !message.isEmpty {
            if !subtitle.isEmpty { subtitle += "\n" }
            let truncatedMessage = message.count > 100 ? String(message.prefix(100)) + "..." : message
            subtitle += String(format: "💬 %@", truncatedMessage)
        }
        
        // 创建SMS信息结构体
        let smsDetails = SMSDetails(phoneNumber: phone, message: message)
        let extraData = try? JSONEncoder().encode(smsDetails)
        
        return ParsedQRData(
            type: .sms,
            title: title,
            subtitle: subtitle,
            icon: "message",
            extraData: extraData
        )
    }
    
    // MARK: - 解析vCard
    private static func parseVCard(_ content: String) -> ParsedQRData {
        // 标准化vCard为3.0版本
        let normalizedVCard = VCardConverter.normalizeVCard(content)
        let contactInfo = parseContactInfoFromVCard(normalizedVCard)
        
        var subtitle = ""
        if !contactInfo.name.isEmpty { subtitle += String(format: "contact_name".localized, contactInfo.name) + "\n" }
        if !contactInfo.phoneNumber.isEmpty { subtitle += String(format: "contact_phone".localized, contactInfo.phoneNumber) + "\n" }
        if !contactInfo.email.isEmpty { subtitle += String(format: "contact_email".localized, contactInfo.email) + "\n" }
        if !contactInfo.organization.isEmpty { subtitle += String(format: "contact_company".localized, contactInfo.organization) + "\n" }
        if !contactInfo.title.isEmpty { subtitle += String(format: "contact_title".localized, contactInfo.title) + "\n" }
        if !contactInfo.address.isEmpty { subtitle += String(format: "contact_address".localized, contactInfo.address) + "\n" }
        
        // 移除最后一个换行符
        if subtitle.hasSuffix("\n") {
            subtitle = String(subtitle.dropLast())
        }
        
        // 存储联系人信息到额外数据中
        let extraData = try? JSONEncoder().encode(contactInfo)
        
        return ParsedQRData(
            type: .vcard,
            title: "contact_information".localized,
            subtitle: subtitle,
            icon: "person.crop.rectangle",
            extraData: extraData
        )
    }
    
    // MARK: - 解析MeCard
    private static func parseMeCard(_ content: String) -> ParsedQRData {
        let contactInfo = parseContactInfoFromMeCard(content)
        
        var subtitle = ""
        if !contactInfo.name.isEmpty { subtitle += String(format: "contact_name".localized, contactInfo.name) + "\n" }
        if !contactInfo.phoneNumber.isEmpty { subtitle += String(format: "contact_phone".localized, contactInfo.phoneNumber) + "\n" }
        if !contactInfo.email.isEmpty { subtitle += String(format: "contact_email".localized, contactInfo.email) + "\n" }
        if !contactInfo.organization.isEmpty { subtitle += String(format: "contact_company".localized, contactInfo.organization) + "\n" }
        if !contactInfo.title.isEmpty { subtitle += String(format: "contact_title".localized, contactInfo.title) + "\n" }
        if !contactInfo.address.isEmpty { subtitle += String(format: "contact_address".localized, contactInfo.address) + "\n" }
        
        // 移除最后一个换行符
        if subtitle.hasSuffix("\n") {
            subtitle = String(subtitle.dropLast())
        }
        
        // 存储联系人信息到额外数据中
        let extraData = try? JSONEncoder().encode(contactInfo)
        
        return ParsedQRData(
            type: .mecard,
            title: "contact_information".localized,
            subtitle: subtitle,
            icon: "person.crop.rectangle",
            extraData: extraData
        )
    }
    
    // MARK: - 解析Calendar
    private static func parseCalendar(_ content: String) -> ParsedQRData {
        let lines = content.components(separatedBy: .newlines)
        var summary = ""
        var startTime = ""
        var endTime = ""
        var location = ""
        var description = ""
        
        for line in lines {
            let trimmedLine = line.trimmingCharacters(in: .whitespaces)
            if trimmedLine.uppercased().hasPrefix("SUMMARY:") {
                summary = String(trimmedLine.dropFirst(8)).trimmingCharacters(in: .whitespaces)
            } else if trimmedLine.uppercased().hasPrefix("DTSTART:") {
                startTime = String(trimmedLine.dropFirst(8)).trimmingCharacters(in: .whitespaces)
            } else if trimmedLine.uppercased().hasPrefix("DTEND:") {
                endTime = String(trimmedLine.dropFirst(6)).trimmingCharacters(in: .whitespaces)
            } else if trimmedLine.uppercased().hasPrefix("LOCATION:") {
                location = String(trimmedLine.dropFirst(9)).trimmingCharacters(in: .whitespaces)
            } else if trimmedLine.uppercased().hasPrefix("DESCRIPTION:") {
                description = String(trimmedLine.dropFirst(12)).trimmingCharacters(in: .whitespaces)
            }
        }
        
        // 格式化时间显示
        let formattedStartTime = formatCalendarTime(startTime)
        let formattedEndTime = formatCalendarTime(endTime)
        
        let title = "calendar_event".localized
        var subtitle = ""
        
        // 构建更美观的副标题
        if !summary.isEmpty {
            subtitle += summary
        }
        
        if !formattedStartTime.isEmpty {
            if !subtitle.isEmpty { subtitle += "\n" }
            subtitle += String(format: "📅 %@", formattedStartTime)
        }
        
        if !formattedEndTime.isEmpty && formattedEndTime != formattedStartTime {
            subtitle += String(format: " - %@", formattedEndTime)
        }
        
        if !location.isEmpty {
            if !subtitle.isEmpty { subtitle += "\n" }
            subtitle += String(format: "📍 %@", location)
        }
        
        if !description.isEmpty {
            if !subtitle.isEmpty { subtitle += "\n" }
            let truncatedDescription = description.count > 100 ? String(description.prefix(100)) + "..." : description
            subtitle += String(format: "📝 %@", truncatedDescription)
        }
        
        // 存储日历详细信息到额外数据中
        let calendarDetails = CalendarDetails(summary: summary, startTime: startTime, endTime: endTime, location: location, description: description)
        let extraData = try? JSONEncoder().encode(calendarDetails)
        
        return ParsedQRData(
            type: .calendar,
            title: title,
            subtitle: subtitle,
            icon: "calendar",
            extraData: extraData
        )
    }
    
    // MARK: - 格式化日历时间
    private static func formatCalendarTime(_ timeString: String) -> String {
        guard !timeString.isEmpty else { return "" }
        
        let dateFormatter = DateFormatter()
        
        // 尝试不同的时间格式
        let formats = [
            "yyyyMMdd'T'HHmmss",  // 标准格式：20241201T140000
            "yyyyMMdd'T'HHmmss'Z'", // 带Z的格式：20241201T140000Z
            "yyyyMMdd",           // 仅日期：20241201
            "yyyyMMdd'T'HHmm",    // 无秒：20241201T1400
            "yyyy-MM-dd'T'HH:mm:ss", // ISO格式：2024-12-01T14:00:00
            "yyyy-MM-dd'T'HH:mm:ss'Z'" // ISO格式带Z：2024-12-01T14:00:00Z
        ]
        
        for format in formats {
            dateFormatter.dateFormat = format
            if let date = dateFormatter.date(from: timeString) {
                let displayFormatter = DateFormatter()
                displayFormatter.dateStyle = .medium
                displayFormatter.timeStyle = .short
                return displayFormatter.string(from: date)
            }
        }
        
        // 如果无法解析，返回原始字符串
        return timeString
    }
    
    // MARK: - 解析Instagram
    private static func parseInstagram(_ content: String) -> ParsedQRData {
        var username = ""
        
        if content.lowercased().hasPrefix("instagram://user?username=") {
            username = content.replacingOccurrences(of: "instagram://user?username=", with: "", options: .caseInsensitive)
        } else if content.lowercased().contains("instagram.com") {
            // 从网页URL中提取用户名
            let components = content.components(separatedBy: "/")
            if let lastComponent = components.last, !lastComponent.isEmpty && !lastComponent.contains("?") {
                username = lastComponent
            }
        }
        
        return ParsedQRData(
            type: .instagram,
            title: "instagram".localized,
            subtitle: String(format: "instagram_username".localized, username),
            icon: "camera"
        )
    }
    
    // MARK: - 解析Facebook
    private static func parseFacebook(_ content: String) -> ParsedQRData {
        var profileId = ""
        
        if content.lowercased().hasPrefix("fb://profile/") {
            profileId = content.replacingOccurrences(of: "fb://profile/", with: "", options: .caseInsensitive)
        } else if content.lowercased().contains("facebook.com") {
            // 从网页URL中提取用户ID
            let components = content.components(separatedBy: "/")
            if let lastComponent = components.last, !lastComponent.isEmpty && !lastComponent.contains("?") {
                profileId = lastComponent
            }
        }
        
        return ParsedQRData(
            type: .facebook,
            title: "facebook".localized,
            subtitle: String(format: "facebook_profile_id".localized, profileId),
            icon: "person.2"
        )
    }
    
    // MARK: - 解析Spotify
    private static func parseSpotify(_ content: String) -> ParsedQRData {
        var subtitle = ""
        
        if content.lowercased().hasPrefix("spotify:search:") {
            let searchQuery = content.replacingOccurrences(of: "spotify:search:", with: "", options: .caseInsensitive)
            subtitle = String(format: "spotify_search_query".localized, searchQuery)
        } else if content.lowercased().hasPrefix("spotify:track:") {
            let trackId = content.replacingOccurrences(of: "spotify:track:", with: "", options: .caseInsensitive)
            subtitle = String(format: "spotify_track".localized, trackId)
        } else if content.lowercased().hasPrefix("spotify:album:") {
            let albumId = content.replacingOccurrences(of: "spotify:album:", with: "", options: .caseInsensitive)
            subtitle = String(format: "spotify_album".localized, albumId)
        } else if content.lowercased().hasPrefix("spotify:artist:") {
            let artistId = content.replacingOccurrences(of: "spotify:artist:", with: "", options: .caseInsensitive)
            subtitle = String(format: "spotify_artist".localized, artistId)
        } else if content.lowercased().hasPrefix("spotify:playlist:") {
            let playlistId = content.replacingOccurrences(of: "spotify:playlist:", with: "", options: .caseInsensitive)
            subtitle = String(format: "spotify_playlist".localized, playlistId)
        } else if content.lowercased().contains("open.spotify.com") {
            // 从网页URL中提取信息
            if content.lowercased().contains("/track/") {
                let trackId = content.components(separatedBy: "/track/").last?.components(separatedBy: "?").first ?? ""
                subtitle = String(format: "spotify_track".localized, trackId)
            } else if content.lowercased().contains("/album/") {
                let albumId = content.components(separatedBy: "/album/").last?.components(separatedBy: "?").first ?? ""
                subtitle = String(format: "spotify_album".localized, albumId)
            } else if content.lowercased().contains("/artist/") {
                let artistId = content.components(separatedBy: "/artist/").last?.components(separatedBy: "?").first ?? ""
                subtitle = String(format: "spotify_artist".localized, artistId)
            } else if content.lowercased().contains("/playlist/") {
                let playlistId = content.components(separatedBy: "/playlist/").last?.components(separatedBy: "?").first ?? ""
                subtitle = String(format: "spotify_playlist".localized, playlistId)
            }
        }
        
        return ParsedQRData(
            type: .spotify,
            title: "spotify".localized,
            subtitle: subtitle,
            icon: "music.note"
        )
    }
    
    // MARK: - 解析X (Twitter)
    private static func parseTwitter(_ content: String) -> ParsedQRData {
        var username = ""
        
        if content.lowercased().hasPrefix("twitter://user?screen_name=") {
            username = content.replacingOccurrences(of: "twitter://user?screen_name=", with: "", options: .caseInsensitive)
        } else if content.lowercased().contains("x.com") || content.lowercased().contains("twitter.com") {
            username = content.components(separatedBy: "/").dropLast().last ?? ""
        }
        
        return ParsedQRData(
            type: .twitter,
            title: "x".localized,
            subtitle: String(format: "twitter_username".localized, username),
            icon: "bird"
        )
    }
    
    // MARK: - 解析WhatsApp
    private static func parseWhatsApp(_ content: String) -> ParsedQRData {
        let phone = content.replacingOccurrences(of: "whatsapp://send?phone=", with: "", options: .caseInsensitive)
        
        return ParsedQRData(
            type: .whatsapp,
            title: "whatsapp".localized,
            subtitle: String(format: "whatsapp_phone_number".localized, phone),
            icon: "message.circle"
        )
    }
    
    // MARK: - 解析Viber
    private static func parseViber(_ content: String) -> ParsedQRData {
        let phone = content.replacingOccurrences(of: "viber://add?number=", with: "", options: .caseInsensitive)
        
        return ParsedQRData(
            type: .viber,
            title: "viber".localized,
            subtitle: String(format: "viber_phone_number".localized, phone),
            icon: "bubble.left.and.bubble.right"
        )
    }
    
    // MARK: - 解析Snapchat
    private static func parseSnapchat(_ content: String) -> ParsedQRData {
        let username = content.replacingOccurrences(of: "snapchat://", with: "", options: .caseInsensitive)
        
        return ParsedQRData(
            type: .snapchat,
            title: "snapchat".localized,
            subtitle: String(format: "snapchat_username".localized, username),
            icon: "camera.viewfinder"
        )
    }
    
    // MARK: - 解析TikTok
    private static func parseTikTok(_ content: String) -> ParsedQRData {
        var username = ""
        
        if content.lowercased().contains("www.tiktok.com") {
            // 处理 https://www.tiktok.com/@username 格式
            if let atIndex = content.lastIndex(of: "@") {
                username = String(content[content.index(after: atIndex)...])
            }
        } else if content.lowercased().contains("tiktok.com") {
            // 处理 https://tiktok.com/@username 格式
            if let atIndex = content.lastIndex(of: "@") {
                username = String(content[content.index(after: atIndex)...])
            }
        }
        
        return ParsedQRData(
            type: .tiktok,
            title: "tiktok".localized,
            subtitle: String(format: "tiktok_username".localized, username),
            icon: "music.mic"
        )
    }
    
    // MARK: - 解析URL
    private static func parseURL(_ content: String) -> ParsedQRData {
        return ParsedQRData(
            type: .url,
            title: "url_link".localized,
            subtitle: content,
            icon: "link"
        )
    }
    
    // MARK: - 解析Location
    private static func parseLocation(_ content: String) -> ParsedQRData {
        let coordinates = content.replacingOccurrences(of: "geo:", with: "")
        let coords = coordinates.components(separatedBy: ",")
        
        let latitude = coords.first ?? ""
        let longitude = coords.count > 1 ? coords[1] : ""
        
        let title = "geolocation".localized
        let subtitle = String(format: "geolocation_coordinates".localized, latitude, longitude)
        
        return ParsedQRData(
            type: .location,
            title: title,
            subtitle: subtitle,
            icon: "location"
        )
    }
    
    // MARK: - 联系人信息解析方法
    
    /// 从vCard内容解析联系人信息
    static func parseContactInfoFromVCard(_ content: String) -> ContactInfo {
        let lines = content.components(separatedBy: .newlines)
        var contactInfo = ContactInfo()
        
        for line in lines {
            let trimmedLine = line.trimmingCharacters(in: .whitespaces)
            if trimmedLine.hasPrefix("FN:") {
                contactInfo.name = String(trimmedLine.dropFirst(3))
            } else if trimmedLine.hasPrefix("TEL") {
                let telValue = String(trimmedLine.dropFirst(3))
                if telValue.contains(":") {
                    let number = telValue.components(separatedBy: ":").last ?? ""
                    contactInfo.phoneNumber = number
                }
            } else if trimmedLine.hasPrefix("EMAIL") {
                let emailValue = String(trimmedLine.dropFirst(5))
                if emailValue.contains(":") {
                    let emailAddress = emailValue.components(separatedBy: ":").last ?? ""
                    contactInfo.email = emailAddress
                }
            } else if trimmedLine.hasPrefix("ORG:") {
                contactInfo.organization = String(trimmedLine.dropFirst(4))
            } else if trimmedLine.hasPrefix("TITLE:") {
                contactInfo.title = String(trimmedLine.dropFirst(6))
            } else if trimmedLine.hasPrefix("ADR") {
                let adrValue = String(trimmedLine.dropFirst(3))
                if adrValue.contains(":") {
                    let addressParts = adrValue.components(separatedBy: ":")
                    if addressParts.count > 1 {
                        let addressComponents = addressParts[1].components(separatedBy: ";")
                        if addressComponents.count >= 3 {
                            contactInfo.address = "\(addressComponents[2]) \(addressComponents[1])"
                        }
                    }
                }
            }
        }
        
        return contactInfo
    }
    
    /// 从MeCard内容解析联系人信息
    static func parseContactInfoFromMeCard(_ content: String) -> ContactInfo {
        let mecardInfo = content.replacingOccurrences(of: "MECARD:", with: "")
        let components = mecardInfo.components(separatedBy: ";")
        var contactInfo = ContactInfo()
        
        for component in components {
            let trimmedComponent = component.trimmingCharacters(in: .whitespaces)
            if trimmedComponent.isEmpty { continue }
            
            if trimmedComponent.hasPrefix("N:") {
                let nameValue = String(trimmedComponent.dropFirst(2))
                let nameParts = nameValue.components(separatedBy: ",")
                if nameParts.count >= 2 {
                    let lastName = nameParts[0]
                    let firstName = nameParts[1]
                    contactInfo.name = "\(firstName) \(lastName)"
                } else if nameParts.count == 1 {
                    contactInfo.name = nameParts[0]
                }
            } else if trimmedComponent.hasPrefix("TEL:") {
                contactInfo.phoneNumber = String(trimmedComponent.dropFirst(4))
            } else if trimmedComponent.hasPrefix("EMAIL:") {
                contactInfo.email = String(trimmedComponent.dropFirst(6))
            } else if trimmedComponent.hasPrefix("ORG:") {
                contactInfo.organization = String(trimmedComponent.dropFirst(4))
            } else if trimmedComponent.hasPrefix("TITLE:") {
                contactInfo.title = String(trimmedComponent.dropFirst(6))
            } else if trimmedComponent.hasPrefix("ADR:") {
                contactInfo.address = String(trimmedComponent.dropFirst(4))
            }
        }
        
        return contactInfo
    }
    
    /// 通用联系人信息解析方法
    static func parseContactInfo(from content: String) -> ContactInfo? {
        if content.hasPrefix("BEGIN:VCARD") {
            let normalizedVCard = VCardConverter.normalizeVCard(content)
            let contactInfo = parseContactInfoFromVCard(normalizedVCard)
            return (contactInfo.name.isEmpty && contactInfo.phoneNumber.isEmpty) ? nil : contactInfo
        } else if content.hasPrefix("MECARD:") {
            let contactInfo = parseContactInfoFromMeCard(content)
            return (contactInfo.name.isEmpty && contactInfo.phoneNumber.isEmpty) ? nil : contactInfo
        }
        return nil
    }
    
    // MARK: - 验证URL
    private static func isValidURL(_ string: String) -> Bool {
        guard let url = URL(string: string) else { return false }
        return UIApplication.shared.canOpenURL(url)
    }
}