package com.narutohuo.xindazhou.qrcode.impl

import android.app.Activity
import android.graphics.Bitmap
import android.util.Log
import com.narutohuo.xindazhou.qrcode.api.QRCodeService
import com.narutohuo.xindazhou.qrcode.model.QRCodeResponse

/**
 * 二维码服务实现类（单例模式）
 * 
 * 使用单例方便管理，多个界面可以共享同一个扫码服务
 * 
 * 注意：具体实现需要集成华为扫码SDK
 * 当前为基础框架，具体逻辑待实现
 */
class QRCodeServiceImpl private constructor() : QRCodeService {
    
    companion object {
        @Volatile
        private var INSTANCE: QRCodeServiceImpl? = null
        
        /**
         * 获取二维码服务单例
         */
        @JvmStatic
        fun getInstance(): QRCodeServiceImpl {
            return INSTANCE ?: synchronized(this) {
                INSTANCE ?: QRCodeServiceImpl().also { INSTANCE = it }
            }
        }
        
        /**
         * 销毁单例（用于测试）
         */
        @JvmStatic
        fun destroyInstance() {
            INSTANCE = null
        }
    }
    
    private val tag = "QRCodeService"
    
    override fun generateQRCode(content: String, size: Int): Bitmap? {
        Log.d(tag, "generateQRCode: content=$content, size=$size")
        // TODO: 使用华为扫码SDK生成二维码
        // val options = HmsBuildBitmapOption.Creator().setBitmapBackgroundColor(Color.WHITE).create()
        // return ScanUtil.generateQRCode(content, size, size, options)
        return null
    }
    
    override fun scanQRCode(activity: Activity, callback: (QRCodeResponse) -> Unit) {
        Log.d(tag, "scanQRCode: 启动扫码（待实现）")
        // TODO: 使用华为扫码SDK启动扫码界面
        // val options = HmsScanAnalyzerOptions.Creator().setHmsScanTypes(HmsScan.QRCODE_SCAN_TYPE).create()
        // ScanUtil.startScan(activity, REQUEST_CODE_SCAN, options)
        callback(
            QRCodeResponse(
                success = false,
                data = null,
                errorMessage = "Not implemented"
            )
        )
    }
    
    override fun recognizeQRCode(bitmap: Bitmap, callback: (QRCodeResponse) -> Unit) {
        Log.d(tag, "recognizeQRCode: 识别二维码（待实现）")
        // TODO: 使用华为扫码SDK识别图片中的二维码
        // val options = HmsScanAnalyzerOptions.Creator().setHmsScanTypes(HmsScan.QRCODE_SCAN_TYPE).create()
        // val results = ScanUtil.decodeWithBitmap(bitmap, options)
        callback(
            QRCodeResponse(
                success = false,
                data = null,
                errorMessage = "Not implemented"
            )
        )
    }
}

