//////////////////////////////////////////////////////////////////////////////////////////////////
//
//  FuzzingTests.swift
//  Starscream
//
//  Created by Dalton Cherry on 1/28/19.
//  Copyright © 2019 Vluxe. All rights reserved.
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//  http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.
//
//////////////////////////////////////////////////////////////////////////////////////////////////

import XCTest
@testable import Starscream

class FuzzingTests: XCTestCase {
    
    var websocket: WebSocket!
    var server: MockServer!
    var uuid = ""
    
    override func setUp() {
        super.setUp()
        
        let s = MockServer()
        let _ = s.start(address: "", port: 0)
        server = s
        
        let transport = MockTransport(server: s)
        uuid = transport.uuid
        
        let url = URL(string: "http://vluxe.io/ws")! //domain doesn't matter with the mock transport
        let request = URLRequest(url: url)        
        websocket = WebSocket(request: request, engine: WSEngine(transport: transport))
        
    }
    
    override func tearDown() {
        super.tearDown()
    }
    
    func runWebsocket(timeout: TimeInterval = 10, serverAction: @escaping ((ServerEvent) -> Bool)) {
        let e = expectation(description: "Websocket event timeout")
        server.onEvent = { event in
            let done = serverAction(event)
            if done {
                e.fulfill()
            }
        }
        
        websocket.onEvent = { event in
            switch event {
            case .text(let string):
                self.websocket.write(string: string)
            case .binary(let data):
                self.websocket.write(data: data)
            case .ping(_):
                break
            case .pong(_):
                break
            case .connected(_):
                break
            case .disconnected(let reason, let code):
                print("reason: \(reason) code: \(code)")
            case .error(_):
                break
            case .viabilityChanged(_):
                break
            case .reconnectSuggested(_):
                break
            case .cancelled:
                break
            case .peerClosed:
                break
            }
        }
        websocket.connect()
        waitForExpectations(timeout: timeout) { error in
            if let error = error {
                XCTFail("waitForExpectationsWithTimeout errored: \(error)")
            }
        }
    }
    
    func sendMessage(string: String, isBinary: Bool) {
        let payload = string.data(using: .utf8)!
        let code: FrameOpCode = isBinary ? .binaryFrame : .textFrame
        runWebsocket { event in
            switch event {
            case .connected(let conn, _):
                conn.write(data: payload, opcode: code)
            case .text(let conn, let text):
                if text == string && !isBinary {
                    conn.write(data: Data(), opcode: .connectionClose)
                    return true //success!
                } else {
                    XCTFail("text does not match: source: [\(string)] response: [\(text)]")
                }
            case .binary(let conn, let data):
                if payload.count == data.count && isBinary {
                    conn.write(data: Data(), opcode: .connectionClose)
                    return true //success!
                } else {
                    XCTFail("binary does not match: source: [\(payload.count)] response: [\(data.count)]")
                }
                case .disconnected(_, _, _):
                    return false
            default:
                XCTFail("recieved unexpected server event: \(event)")
            }
            return false
        }
    }
    
    //These are the Autobahn test cases as unit tests
    
    
    /// MARK : - Framing cases
    
    // case 1.1.1
    func testCase1() {
        sendMessage(string: "", isBinary: false)
    }
    
    // case 1.1.2
    func testCase2() {
        sendMessage(string: String(repeating: "*", count: 125), isBinary: false)
    }
    
    // case 1.1.3
    func testCase3() {
        sendMessage(string: String(repeating: "*", count: 126), isBinary: false)
    }
    
    // case 1.1.4
    func testCase4() {
        sendMessage(string: String(repeating: "*", count: 127), isBinary: false)
    }
    
    // case 1.1.5
    func testCase5() {
        sendMessage(string: String(repeating: "*", count: 128), isBinary: false)
    }
    
    // case 1.1.6
    func testCase6() {
        sendMessage(string: String(repeating: "*", count: 65535), isBinary: false)
    }
    
    // case 1.1.7, 1.1.8
    func testCase7() {
        sendMessage(string: String(repeating: "*", count: 65536), isBinary: false)
    }
    
    // case 1.2.1
    func testCase9() {
        sendMessage(string: "", isBinary: true)
    }
    
    // case 1.2.2
    func testCase10() {
        sendMessage(string: String(repeating: "*", count: 125), isBinary: true)
    }
    
    // case 1.2.3
    func testCase11() {
        sendMessage(string: String(repeating: "*", count: 126), isBinary: true)
    }
    
    // case 1.2.4
    func testCase12() {
        sendMessage(string: String(repeating: "*", count: 127), isBinary: true)
    }
    
    // case 1.2.5
    func testCase13() {
        sendMessage(string: String(repeating: "*", count: 128), isBinary: true)
    }
    
    // case 1.2.6
    func testCase14() {
        sendMessage(string: String(repeating: "*", count: 65535), isBinary: true)
    }
    
    // case 1.2.7, 1.2.8
    func testCase15() {
        sendMessage(string: String(repeating: "*", count: 65536), isBinary: true)
    }
    
    //TODO: the rest of them.
}