Trio/Dependencies/MinimedKit/MinimedKitTests/PumpOpsSynchronousBuildFromFramesTests.swift

//
//  PumpOpsSynchronousBuildFromFramesTests.swift
//  RileyLink
//
//  Created by Jaim Zuber on 3/8/17.
//  Copyright © 2017 LoopKit Authors. All rights reserved.
//

import XCTest

@testable import RileyLinkKit
@testable import MinimedKit
@testable import RileyLinkBLEKit

class PumpOpsSynchronousBuildFromFramesTests: XCTestCase {
    
    var sut: PumpOpsSession!
    var pumpSettings: PumpSettings!
    var pumpState: PumpState!
    var pumpID: String!
    var pumpRegion: PumpRegion!
    var pumpModel: PumpModel!
    var mockPumpMessageSender: MockPumpMessageSender!
    var timeZone: TimeZone!
    
    override func setUp() {
        super.setUp()
        
        pumpID = "350535"
        pumpRegion = .worldWide
        pumpModel = PumpModel.model523

        mockPumpMessageSender = MockPumpMessageSender()
        timeZone = TimeZone(secondsFromGMT: 0)
        
        loadSUT()
    }
    
    func loadSUT() {
        pumpSettings = PumpSettings(pumpID: pumpID, pumpRegion: pumpRegion)
        pumpState = PumpState()
        pumpState.pumpModel = pumpModel
        pumpState.awakeUntil = Date(timeIntervalSinceNow: 100) // pump is awake
        
        sut = PumpOpsSession(settings: pumpSettings, pumpState: pumpState, messageSender: mockPumpMessageSender, delegate: mockPumpMessageSender)
    }
    
    func testErrorIsntThrown() {
        mockPumpMessageSender.responses = buildResponsesDictionary()
        
        assertNoThrow(try _ = sut.getHistoryEvents(since: Date()))
    }
    
    func testUnexpectedResponseThrowsError() {
        var responseDictionary = buildResponsesDictionary()
        var pumpAckArray = responseDictionary[.getHistoryPage]!
        let message = PumpMessage(pumpID: pumpSettings.pumpID, type: .buttonPress)
        pumpAckArray.insert(message, at: 0)
        responseDictionary[.getHistoryPage]! = pumpAckArray
        
        mockPumpMessageSender.responses = responseDictionary
        
        // Didn't receive a .pumpAck short reponse so throw an error
        assertThrows(try _ = sut.getHistoryEvents(since: Date()))
    }
    
    func testUnexpectedPumpAckResponseThrowsError() {
        var responseDictionary = buildResponsesDictionary()
        var pumpAckArray = responseDictionary[.getHistoryPage]!
        let message = PumpMessage(pumpID: pumpSettings.pumpID, type: .buttonPress)
        pumpAckArray.insert(message, at: 1)
        responseDictionary[.getHistoryPage]! = pumpAckArray
        
        mockPumpMessageSender.responses = responseDictionary
        
        // Didn't receive a .getHistoryPage as 2nd response so throw an error
        assertThrows(try _ = sut.getHistoryEvents(since: Date()))
    }
    
    func test332EventsReturnedUntilOutOrder() {
        mockPumpMessageSender.responses = buildResponsesDictionary()
        
        let date = Date(timeIntervalSince1970: 0)
        do {
            let (historyEvents, _) = try sut.getHistoryEvents(since: date)
            
            XCTAssertEqual(historyEvents.count, 334)
        } catch {
            XCTFail()
        }
    }
    
    func testEventsReturnedAfterTime() {
        mockPumpMessageSender.responses = buildResponsesDictionary()
        timeZone = TimeZone.current
        
        loadSUT()
        
        
        let date = DateComponents(calendar: Calendar.current, timeZone: pumpState.timeZone, year: 2017, month: 2, day: 11, hour: 0, minute: 0, second: 0).date!
        do {
            let (historyEvents, _) = try sut.getHistoryEvents(since: date)

            // Ends because we reached event before or at date
            XCTAssertEqual(historyEvents.count, 290)
        } catch {
            XCTFail()
        }
    }
    
    func testGMTEventsAreTheSame() {
        mockPumpMessageSender.responses = buildResponsesDictionary()
        timeZone = TimeZone(secondsFromGMT:0)
        
        loadSUT()
        
        let date = DateComponents(calendar: Calendar.current, timeZone: pumpState.timeZone, year: 2017, month: 2, day: 11, hour: 0, minute: 0, second: 0).date!
        do {
            let (historyEvents, _) = try sut.getHistoryEvents(since: date)

            // Ends because we reached event before or at date
            XCTAssertEqual(historyEvents.count, 290)
        } catch {
            XCTFail()
        }
    }
    
    func testEventsReturnedAreAscendingOrder() {
        mockPumpMessageSender.responses = buildResponsesDictionary()
        
        //02/11/2017 @ 12:00am (UTC)
        let date = DateComponents(calendar: Calendar.current, timeZone: pumpState.timeZone, year: 2017, month: 2, day: 11, hour: 0, minute: 0, second: 0).date!
        do {
             let (historyEvents, _) = try sut.getHistoryEvents(since: date)

            var dateCursor = historyEvents[0].date
            
            historyEvents.forEach { event in
                
                // Events can be slightly out of order
                if ( dateCursor.timeIntervalSince(event.date) > TimeInterval(minutes: 0.2)) {
                    // But shouldn't be this much
                    XCTFail("Found out of order event")
                }
                
                dateCursor = event.date
            }
            } catch {
            XCTFail()
        }
    }
    
    func buildResponsesDictionary() -> [MessageType : [PumpMessage]] {
        
        var dictionary = [MessageType : [PumpMessage]]()
        
        // Build array of Messages for each frame
        let frameZeroMessages = buildPumpMessagesFromFrameArray(fetchPageZeroFrames)
        let frameOneMessages = buildPumpMessagesFromFrameArray(fetchPageOneFrames)
        let frameTwoMessages = buildPumpMessagesFromFrameArray(fetchPageTwoFrames)
        let frameThreeMessages = buildPumpMessagesFromFrameArray(fetchPageThreeFrames)
        let frameFourMessages = buildPumpMessagesFromFrameArray(fetchPageFourFrames)
        
        let pumpAckMessage = PumpMessage(pumpID: pumpSettings.pumpID, type: .pumpAck, body: PumpAckMessageBody(rxData: Data(count: 1))!)
        
        let errorResponseMessage = PumpMessage(pumpID: pumpSettings.pumpID, type: .errorResponse, body: PumpErrorMessageBody(rxData: Data(count: 1))!)
        
        var getHistoryPageArray = [pumpAckMessage, frameZeroMessages[0]]
        getHistoryPageArray.append(contentsOf: [pumpAckMessage, frameOneMessages[0]])
        getHistoryPageArray.append(contentsOf: [pumpAckMessage, frameTwoMessages[0]])
        getHistoryPageArray.append(contentsOf: [pumpAckMessage, frameThreeMessages[0]])
        getHistoryPageArray.append(contentsOf: [pumpAckMessage, frameFourMessages[0]])
        getHistoryPageArray.append(errorResponseMessage)
        
        // pump will be called twice, normal operation will receive a pumpAck and getHistoryPageMessage
        dictionary[.getHistoryPage] = getHistoryPageArray
        
        var pumpAckArray = Array(frameZeroMessages.suffix(from: 1))
        pumpAckArray.append(contentsOf: Array(frameOneMessages.suffix(from: 1)))
        pumpAckArray.append(contentsOf: Array(frameTwoMessages.suffix(from: 1)))
        pumpAckArray.append(contentsOf: Array(frameThreeMessages.suffix(from: 1)))
        pumpAckArray.append(contentsOf: Array(frameFourMessages.suffix(from: 1)))
        // Pump sends more data after we send a .pumpAck
        dictionary[.pumpAck] = pumpAckArray
        
        return dictionary
    }

    
    func buildPumpMessagesFromFrameArray(_ frameArray: [String]) -> [PumpMessage] {
        return frameArray.map { self.buildPumpMessageFromFrame($0) }
    }
    
    func buildPumpMessageFromFrame(_ frame: String) -> PumpMessage {
        let frameData = Data(hexadecimalString: frame)!
        let getHistoryPageMessageBody = GetHistoryPageCarelinkMessageBody(rxData: frameData)!
        let getHistoryPageMessage = PumpMessage(packetType: PacketType.carelink, address: self.pumpID, messageType: .getHistoryPage, messageBody: getHistoryPageMessageBody)
        return getHistoryPageMessage
    }
    
    let fetchPageZeroFrames = [
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        "0d00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
        "0e00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
        "0f00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
        "900000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000cbf5"
    ]
    
    let fetchPageOneFrames = [
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    ]
    
    let fetchPageTwoFrames = [
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    ]
    
    let fetchPageThreeFrames = [
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    ]
    
    let fetchPageFourFrames = [
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    ]
}