//
//  RxTest.swift
//  RxTests
//
//  Created by Krunoslav Zaher on 2/8/15.
//  Copyright (c) 2015 Krunoslav Zaher. All rights reserved.
//

import XCTest
import RxSwift
import CoreLocation

#if TRACE_RESOURCES
#elseif RELEASE
#else
//let a = unknown
#endif

// because otherwise OSX unit tests won't run
#if os(iOS)
    import UIKit
#elseif os(OSX)
    import AppKit
#endif

typealias Time = Int

func XCTAssertErrorEqual(lhs: ErrorType, _ rhs: ErrorType) {
    XCTAssertTrue(lhs as NSError === rhs as NSError)
}

func XCTAssertEqual<T>(lhs: [T], _ rhs: [T], _ comparison: (T, T) -> Bool) {
    XCTAssertEqual(lhs.count, rhs.count)
    XCTAssertTrue(zip(lhs, rhs).reduce(true) { (a: Bool, z: (T, T)) in a && comparison(z.0, z.1) })
}

let testError = NSError(domain: "dummyError", code: -232, userInfo: nil)
let testError1 = NSError(domain: "dummyError1", code: -233, userInfo: nil)
let testError2 = NSError(domain: "dummyError2", code: -234, userInfo: nil)

func next<T>(value: T) -> Recorded<T> {
    return Recorded(time: 0, event: .Next(value))
}

func completed<T>() -> Recorded<T> {
    return Recorded(time: 0, event: .Completed)
}

func error<T>(error: NSError) -> Recorded<T> {
    return Recorded(time: 0, event: .Error(error))
}

func next<T>(time: Time, _ value: T) -> Recorded<T> {
    return Recorded(time: time, event: .Next(value))
}

func completed<T>(time: Time) -> Recorded<T> {
    return Recorded(time: time, event: .Completed)
}

func error<T>(time: Time, _ error: ErrorType) -> Recorded<T> {
    return Recorded(time: time, event: .Error(error))
}

class RxTest: XCTestCase {
    struct Defaults {
        static let created = 100
        static let subscribed = 200
        static let disposed = 1000
    }
    
    func sleep(time: NSTimeInterval) {
        NSRunLoop.currentRunLoop().runMode(NSDefaultRunLoopMode, beforeDate: NSDate(timeIntervalSinceNow: time))
    }
    
    private var startResourceCount: Int32 = 0

    var accumulateStatistics: Bool {
        get {
            return true
        }
    }

#if TRACE_RESOURCES
    static var totalNumberOfAllocations: Int64 = 0
    static var totalNumberOfAllocatedBytes: Int64 = 0

    var startNumberOfAllocations: Int64 = 0
    var startNumberOfAllocatedBytes: Int64 = 0
#endif

    override func setUp() {
        super.setUp()
        // Put setup code here. This method is called before the invocation of each test method in the class.
        
#if TRACE_RESOURCES
        self.startResourceCount = resourceCount
        registerMallocHooks()
        (startNumberOfAllocatedBytes, startNumberOfAllocations) = getMemoryInfo()
#endif
    }
    
    override func tearDown() {
        // Put teardown code here. This method is called after the invocation of each test method in the class.
        super.tearDown()

#if TRACE_RESOURCES

        // give 5 sec to clean up resources
        for var i = 0; i < 10; ++i {
            if self.startResourceCount < resourceCount {
                // main schedulers need to finish work
                NSRunLoop.currentRunLoop().runMode(NSDefaultRunLoopMode, beforeDate: NSDate(timeIntervalSinceNow: 0.05))
            }
            else {
                break
            }
        }

        XCTAssertEqual(self.startResourceCount, resourceCount)
        let (endNumberOfAllocatedBytes, endNumberOfAllocations) = getMemoryInfo()

        let (newBytes, newAllocations) = (endNumberOfAllocatedBytes - startNumberOfAllocatedBytes, endNumberOfAllocations - startNumberOfAllocations)

        if accumulateStatistics {
            RxTest.totalNumberOfAllocations += newAllocations
            RxTest.totalNumberOfAllocatedBytes += newBytes
        }
        print("allocatedBytes = \(newBytes), allocations = \(newAllocations) (totalBytes = \(RxTest.totalNumberOfAllocatedBytes), totalAllocations = \(RxTest.totalNumberOfAllocations))")
#endif
    }
    
    func on<T>(time: Time, _ event: Event<T>) -> Recorded<T> {
        return Recorded(time: time, event: event)
    }
    
}