package uts.sdk.modules.uniRequestMerchantTransfer

import android.content.Context
import io.dcloud.uts.UTSAndroid
import java.net.URLEncoder
import java.nio.charset.StandardCharsets

object RequestMerchantTransferNative {
    private const val OPEN_BUSINESS_VIEW_SDK_INT = 0x25020500

    fun send(
        appId: String?,
        mchId: String,
        packageValue: String,
        openId: String?,
        subAppId: String?,
        subMchId: String?,
        done: (Boolean, String) -> Unit
    ) {
        val context = UTSAndroid.getAppContext()
        if (context == null) {
            done(false, "当前应用上下文不可用")
            return
        }

        try {
            val factoryClass = try {
                Class.forName("com.tencent.mm.opensdk.openapi.WXAPIFactory")
            } catch (_: Throwable) {
                null
            }

            if (factoryClass == null) {
                done(false, "未集成微信 OpenSDK，请使用自定义基座或打包运行")
                return
            }

            val createMethod = factoryClass.getMethod(
                "createWXAPI",
                Context::class.java,
                String::class.java,
                Boolean::class.javaPrimitiveType
            )
            val api = createMethod.invoke(null, context, appId, false)
            if (api == null) {
                done(false, "微信 API 初始化失败")
                return
            }

            val apiClass = api.javaClass
            val getApiVersionMethod = apiClass.methods.firstOrNull {
                it.name == "getWxAppSupportAPI" || it.name == "getWXAppSupportAPI"
            }
            val wxSdkVersion = (getApiVersionMethod?.invoke(api) as? Number)?.toInt() ?: 0

            var requiredSdkVersion = OPEN_BUSINESS_VIEW_SDK_INT
            try {
                val buildClass = Class.forName("com.tencent.mm.opensdk.constants.Build")
                val field = buildClass.getField("OPEN_BUSINESS_VIEW_SDK_INT")
                requiredSdkVersion = field.getInt(null)
            } catch (_: Throwable) {
            }

            if (wxSdkVersion < requiredSdkVersion) {
                done(false, "当前微信版本过低，请升级微信以使用该功能")
                return
            }

            fun encode(v: String?): String {
                return if (v != null) URLEncoder.encode(v, StandardCharsets.UTF_8.name()) else ""
            }

            val queryBuilder = StringBuilder()
            queryBuilder.append("mchId=").append(encode(mchId)).append("&")
            queryBuilder.append("package=").append(encode(packageValue)).append("&")
            if (appId != null) {
                queryBuilder.append("appId=").append(encode(appId)).append("&")
            }
            if (openId != null) {
                queryBuilder.append("openId=").append(encode(openId)).append("&")
            }
            if (subAppId != null) {
                queryBuilder.append("subAppId=").append(encode(subAppId)).append("&")
            }
            if (subMchId != null) {
                queryBuilder.append("subMchId=").append(encode(subMchId)).append("&")
            }
            val queryString = if (queryBuilder.isNotEmpty() && queryBuilder.endsWith("&")) {
                queryBuilder.substring(0, queryBuilder.length - 1)
            } else {
                queryBuilder.toString()
            }

            val reqClass = Class.forName("com.tencent.mm.opensdk.modelbiz.WXOpenBusinessView\$Req")
            val reqInstance = reqClass.getDeclaredConstructor().newInstance()

            reqClass.getField("businessType").set(reqInstance, "requestMerchantTransfer")
            reqClass.getField("query").set(reqInstance, queryString)

            val sendReqMethod = apiClass.methods.firstOrNull {
                it.name == "sendReq" && it.parameterTypes.size == 1
            }

            val ret = (sendReqMethod?.invoke(api, reqInstance) as? Boolean) ?: false
            if (ret) {
                done(true, "ok")
            } else {
                done(false, "fail")
            }
        } catch (e: Throwable) {
            done(false, "调用微信转账接口异常: " + (e.message ?: ""))
        }
    }
}