//
//  NetworkService.swift
//  
//
//  Created by Juraldinio on 04.08.2022.
//

import Foundation
import Alamofire

public struct NetworkStaticAPIRecord {
    
    public typealias Headers = [String: String]
    
    public let url: URL
    public let headers: Headers?
    
    public init(url: URL, headers: Headers?) {
        self.url = url
        self.headers = headers
    }
    
    var httpHeaders: HTTPHeaders? {
        guard let headers = self.headers else { return nil }
        return HTTPHeaders(headers.compactMap { key, value in HTTPHeader(name: key, value: value) })
    }
}

public struct NetworkDynamicAPIRecord {
    
    public typealias Headers = [String: String]
    public typealias Dynamic = () -> URL
    
    public let url: Dynamic
    public let headers: Headers?
    
    public init(url: @escaping Dynamic, headers: Headers?) {
        self.url = url
        self.headers = headers
    }
    
    var httpHeaders: HTTPHeaders? {
        guard let headers = self.headers else { return nil }
        return HTTPHeaders(headers.compactMap { key, value in HTTPHeader(name: key, value: value) })
    }
}

public protocol NetworkEnvironment {
    var configuration: URLSessionConfiguration? { get }
    var usernames: NetworkStaticAPIRecord { get }
    var backend: NetworkStaticAPIRecord { get }
    var hyperion: NetworkDynamicAPIRecord { get }
    var node: NetworkDynamicAPIRecord { get }
    
    func isEquals(other: NetworkEnvironment) -> Bool
}

public protocol NetworkService {
    init(environment: NetworkEnvironment)
}

public enum NetworkServiceError: Error {
    case invalidUrl
    case gqlSystem([String])
    case gqlApplication(String)
    case gqlDecode(String)
    case uncatched
}

// MARK: - Equatable

extension NetworkEnvironment {
    public func isEquals(other: NetworkEnvironment) -> Bool {
        return self.configuration == other.configuration &&
            self.usernames.url == other.usernames.url &&
            self.usernames.headers == other.usernames.headers &&
            self.backend.url == other.backend.url &&
            self.backend.headers == other.backend.headers &&
            self.hyperion.url() == other.hyperion.url() &&
            self.hyperion.headers == other.hyperion.headers &&
            self.node.url() == other.node.url() &&
            self.node.headers == other.node.headers
    }
}