//
//  URLMessage+Description.swift
//  RevenueCat
//
//  Created by Dave DeLong on 8/7/26.
//

#if DEBUG

import Foundation

/*
 These are convenience methods to stringify an HTTP message, and are exceptionally useful
 when debugging networking calls. Do not rely on them for anything more than purely informational purposes.

 These methods are only present in DEBUG builds.
 */

extension URLRequest {

    private var sortedHeaders: [(String, String)] {
        guard let headers = allHTTPHeaderFields else { return [] }
        return headers.sorted(by: { $0.key < $1.key })
    }

    internal func httpDescription(maxBodySize: Int = 2048) -> String {
        var lines = [String]()
        lines.append("\(httpMethod ?? "GET") \(url?.absoluteString ?? "<none>")")
        for (key, value) in sortedHeaders {
            lines.append("\(key): \(value)")
        }
        if let body = self.httpBody, let str = String(bytes: body.prefix(maxBodySize), encoding: .utf8) {
            lines.append("")
            lines.append(str)
        }

        return lines.joined(separator: "\n")
    }

}

extension URLResponse {

    private var sortedHeaders: [(AnyHashable, Any)] {
        guard let http = self as? HTTPURLResponse else { return [] }
        let headers = http.allHeaderFields
        return headers.sorted(by: { $0.key.description < $1.key.description })
    }

    internal func httpDescription(with body: Data?, maxBodySize: Int = 2048) -> String {
        var lines = [String]()

        if let http = self as? HTTPURLResponse {
            lines.append("\(http.statusCode) \(HTTPURLResponse.localizedString(forStatusCode: http.statusCode))")
            for (key, value) in sortedHeaders {
                lines.append("\(key): \(value)")
            }
        } else {
            lines.append("\(type(of: self))")
            lines.append("URL: \(url?.absoluteString ?? "<none>")")
            if let mimeType { lines.append("Mime-Type: \(mimeType)") }
            if expectedContentLength > 0 { lines.append("Expected-Content-Length: \(expectedContentLength)") }
            if let textEncodingName { lines.append("Text-Encoding-Name: \(textEncodingName)") }
            if let suggestedFilename { lines.append("Suggested-File-Name: \(suggestedFilename)") }
        }

        if let body, body.count > 0, let str = String(bytes: body.prefix(maxBodySize), encoding: .utf8) {
            lines.append("")
            lines.append(str)
        }

        return lines.joined(separator: "\n")
    }

}

#endif