//
//  MabAnalyticsEvents.swift
//  Pods
//
//  Created by 250102 on 2025/5/10.
//

// 单例实现
internal class MabAnalyticEvents {
    // 单例访问点
    static let shared = MabAnalyticEvents()
    
    // 私有初始化方法确保单例模式
    private init() {}
    
    static func faLoad(
        faUnitId: String,
        adType: AdType,
        aggregatorId: String,
        adUnitId: String,
        requestReason: RequestReason?
    ) {
        var params: [String: Any] = [:]
        params["fa_unitid"] = faUnitId
        params["aggregator_id"] = aggregatorId
        if let requestReason = requestReason {
            params["req_type"] = requestReason.statsName
        }
        params["ad_format"] = adType.label
        params["ad_unit_name"] = shrink(adUnitId)
        
        AnalyticsEvents.shared.onEvent(name: "fa_load", param: params)
    }
    
    static func faLoaded(
        faUnitId: String,
        adType: AdType,
        adSource: String?,
        aggregatorId: String,
        adUnitId: String,
        durationInMillis: Int64?
    ) {
        guard let durationInMillis = durationInMillis else {
            return
        }
        
        AnalyticsEvents.shared.onEvent(
            name: "fa_loaded",
            pairs:
                ("fa_unitid", faUnitId),
                ("aggregator_id", aggregatorId),
                ("ad_format", adType.label),
                ("duration", durationInMillis),
                ("ad_unit_name", shrink(adUnitId)),
                ("ad_source", (adSource ?? "unknown"))
        )
    }
    
    static func faFailed(
        faUnitId: String,
        adType: AdType,
        aggregatorId: String,
        adUnitId: String,
        durationInMillis: Int64?,
        errorCode: Int
    ) {
        guard let durationInMillis = durationInMillis else {
            return
        }
        
        AnalyticsEvents.shared.onEvent(
            name: "fa_failed",
            pairs:
                ("fa_unitid", faUnitId),
                ("aggregator_id", aggregatorId),
                ("ad_format", adType.label),
                ("duration", durationInMillis),
                ("ad_unit_name", shrink(adUnitId)),
                ("error_code", errorCode)
        )
    }
    
    /**
     * 精简adUnitId以便于不过多占用打点数据包
     */
    private static func shrink(_ adUnitId: String) -> String {
        // shrink a adUnitId from AdMob to a shorter form,
        // for example, ca-app-pub-2436733915645843/9966308712
        // shrink("ca-app-pub-2436733915645843/9966308712") == "9966308712"
        if adUnitId.hasPrefix("ca-app-pub-") && adUnitId.count == 38 && adUnitId[adUnitId.index(adUnitId.startIndex, offsetBy: 27)] == "/" {
            return String(adUnitId.suffix(10))
        }
        
        // no need to shrink
        return adUnitId
    }
}