12. Network Debugging: Proxyman & Charles

# Install
brew install --cask proxyman
# atau download dari proxymam.io

# Setup:
# 1. Buka Proxyman → Install Certificate (untuk HTTPS decryption)
# 2. Di simulator: Settings → General → VPN & Device Management → Trust certificate
# 3. Di device fisik: Settings → Wi-Fi → (i) → Configure Proxy → Manual
#    Host: IP Mac, Port: 9090

# Fitur Proxyman yang berguna:
# - Breakpoint: intercept & edit request/response sebelum dikirim
# - Map Local: ganti response dengan file lokal (untuk mock)
# - Map Remote: redirect URL ke URL lain
# - Repeat: kirim ulang request
# - Scripting: modifikasi request/response dengan JavaScript

// Proxyman Script: tambahkan header ke semua request
function onRequest(context, url, request) {
    request.headers["X-Debug-Mode"] = "true";
    request.headers["X-App-Version"] = "2.0.0";
    return request;
}

// Proxyman Script: mock response untuk endpoint tertentu
function onResponse(context, url, request, response) {
    if (url.includes("/api/products")) {
        response.body = JSON.stringify({
            products: [
                { id: "1", name: "Mock Product", price: 99000 }
            ]
        });
        response.statusCode = 200;
    }
    return response;
}

Charles setup:
1. Help → SSL Proxying → Install Charles Root Certificate
2. Proxy → SSL Proxying Settings → Add: *.api.myapp.com
3. Di device: WiFi → (i) → HTTP Proxy → Manual → Charles IP:8888

Fitur Charles yang tidak ada di Proxyman:
- Throttle network speed (simulasi 3G/EDGE)
- AMF/SOAP support
- DNS Spoofing
- Lebih stable untuk high-traffic load testing

// Gunakan ini untuk logging network di app sendiri tanpa tools eksternal
// Berguna untuk QA atau debug build

class NetworkMonitorProtocol: URLProtocol {
    override class func canInit(with request: URLRequest) -> Bool {
        // Intercept semua HTTP/HTTPS requests
        return URLProtocol.property(forKey: "intercepted", in: request) == nil
    }
    
    override class func canonicalRequest(for request: URLRequest) -> URLRequest {
        return request
    }
    
    override func startLoading() {
        let mutableRequest = (request as NSURLRequest).mutableCopy() as! NSMutableURLRequest
        URLProtocol.setProperty(true, forKey: "intercepted", in: mutableRequest)
        
        let start = Date()
        
        URLSession.shared.dataTask(with: mutableRequest as URLRequest) { data, response, error in
            let duration = Date().timeIntervalSince(start) * 1000
            
            if let httpResponse = response as? HTTPURLResponse {
                print("""
                [Network] \(self.request.httpMethod ?? "GET") \(self.request.url?.absoluteString ?? "")
                  Status: \(httpResponse.statusCode)
                  Duration: \(String(format: "%.0f", duration))ms
                  Size: \(data?.count ?? 0) bytes
                """)
            }
            
            if let error {
                self.client?.urlProtocol(self, didFailWithError: error)
            } else {
                self.client?.urlProtocol(self, didReceive: response!, cacheStoragePolicy: .allowed)
                if let data { self.client?.urlProtocol(self, didLoad: data) }
                self.client?.urlProtocolDidFinishLoading(self)
            }
        }.resume()
    }
    
    override func stopLoading() {}
}

// Register di AppDelegate atau saat setup testing
URLProtocol.registerClass(NetworkMonitorProtocol.self)