//
//  PumpOpsSynchronousBuildFromFramesTests.swift
//  RileyLink
//
//  Created by Jaim Zuber on 3/8/17.
//  Copyright © 2017 Pete Schwamb. 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 messageSenderStub: PumpMessageSenderStub!
    var timeZone: TimeZone!
    
    override func setUp() {
        super.setUp()
        
        pumpID = "350535"
        pumpRegion = .worldWide
        pumpModel = PumpModel.model523

        messageSenderStub = PumpMessageSenderStub()
        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, session: messageSenderStub, delegate: messageSenderStub)
    }
    
    func testErrorIsntThrown() {
        messageSenderStub.responses = buildResponsesDictionary()
        
        assertNoThrow(try _ = sut.getHistoryEvents(since: Date()))
    }
    
    func testUnexpectedResponseThrowsError() {
        var responseDictionary = buildResponsesDictionary()
        var pumpAckArray = responseDictionary[.getHistoryPage]!
        let message = PumpMessage(settings: pumpSettings, type: .buttonPress)
        pumpAckArray.insert(message, at: 0)
        responseDictionary[.getHistoryPage]! = pumpAckArray
        
        messageSenderStub.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(settings: pumpSettings, type: .buttonPress)
        pumpAckArray.insert(message, at: 1)
        responseDictionary[.getHistoryPage]! = pumpAckArray
        
        messageSenderStub.responses = responseDictionary
        
        // Didn't receive a .getHistoryPage as 2nd response so throw an error
        assertThrows(try _ = sut.getHistoryEvents(since: Date()))
    }
    
    func test332EventsReturnedUntilOutOrder() {
        messageSenderStub.responses = buildResponsesDictionary()
        
        let date = Date(timeIntervalSince1970: 0)
        do {
            let (historyEvents, _) = try sut.getHistoryEvents(since: date)
            
            XCTAssertEqual(historyEvents.count, 334)
        } catch {
            XCTFail()
        }
    }
    
    func testEventsReturnedAfterTime() {
        messageSenderStub.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() {
        messageSenderStub.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() {
        messageSenderStub.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(settings: pumpSettings, type: .pumpAck, body: PumpAckMessageBody(rxData: Data(count: 1))!)
        
        let errorResponseMessage = PumpMessage(settings: pumpSettings, 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 = [
        "01030000001822892c15117b050b8a0c1511180a000300030003018a0c1511330028990d551100160128990d551133001fa30d55110016001fa30d55117b051fa3",
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        "0310007b08009e1415112915007b000080001611001000070000014635110000006e351105005e00000100000146013c61000a030005000a000000000000010000",
        "04000000000000000000005e5e00000000000000007b010080011611020c007b020080041611080d007b0300800616110c100033001e800656110016011e800656",
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        "08112915007b000080001711001000070000014136110000006e361105000000000000000141014164000000000000000000000000000000000000000000000000",
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        "0a0080101711200e007b0700801317112610007b08009e1417112915007b000080001811001000070000015737110000006e371105000000000000000157015764",
        "0b0000000000000000000000000000000000000000000000000000000000000000000000007b010080011811020c007b020080041811080d007b0300800618110c",
        "0c100033001d9e0858110016011d9e08581133001dad0858110016001dad0858117b031dad0818110c10007b0400800a1811140b00000000000000000000000000",
        "0d00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
        "0e00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
        "0f00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
        "900000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000cbf5"
    ]
    
    let fetchPageOneFrames = [
        "016e3011050000000000000005c601821a04444a000000000000000004440000000b000000000000000000000000000000000000007b010080011111020c007b02",
        "020080041111080d007b0300800611110c1000010050005000000025a12951117b0400800a1111140b007b0500800c1111180a000100780078000a0032bb2b5111",
        "037b060080101111200e007b0700801311112610007b08009e1411112915007b000080001211001000070000021f31110000006e31110500000000000000021f01",
        "04573f00c825000000000000000000c800000002000000000000000000000000000000000000007b010080011211020c007b020080041211080d007b0300800612",
        "05110c10007b0400800a1211140b007b0500800c1211180a007b060080101211200e007b0700801312112610007b08009e1412112915007b000080001311001000",
        "06070000015732110000006e3211050000000000000001570157640000000000000000000000000000000000000000000000000000000000000000000000007b01",
        "070080011311020c007b020080041311080d007b0300800613110c10007b0400800a1311140b007b0500800c1311180a007b060080101311200e007b0700801313",
        "08112610007b08009e1413112915007b000080001411001000070000015733110000006e3311050000000000000001570157640000000000000000000000000000",
        "09000000000000000000000000000000000000000000007b010080011411020c007b020080041411080d00346417b70514117b0300800614110c10007b0400800a",
        "0a1411140b007b0500800c1411180a007b060080101411200e0033002a931254110016012a931254117b062ab1121411200e007b0700801314112610007b08009e",
        "0b1414112915003432198b1514117b000080001511001000070000015034110000006e341105000000000000000150015064000000000000000000000000000000",
        "0c0000000000000000000000000000000000000000007b010080011511020c007b020080041511080d007b0300800615110c1000330021a206551100160121a206",
        "0d5511330026a706551100160026a70655117b0326a70615110c1000330021bb06551100160121bb0655113300248407551100160024840755117b032584071511",
        "0e0c1000330021a708551100160121a7085511330021b108551100160021b10855117b0321b10815110c1000330021bb08551100160121bb085511330020930955",
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        "9015115b5e0ea30b7511055000b4555a00000a000000000a8c01000a000a0000000ea32b75117b0500800c1511180a00210030880c151100000000000000004e9d"
    ]
    
    let fetchPageTwoFrames = [
        "016e2d110500000000000000016c016c640000000000000000000000000000000000000000000000000000000000000000000000007b010080010e11020c007b02",
        "020080040e11080d007b030080060e110c10007b0400800a0e11140b0033531c840a4e110016011c840a4e1133001d890a4e110016001d890a4e117b041e890a0e",
        "0311140b00334a1d930a4e110016011d930a4e1133001c980a4e110016001c980a4e117b041d980a0e11140b007b0500800c0e11180a007b060080100e11200e00",
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        "90112610007b08009e1410112915007b00008000111100100007000005c63011000000000000000000000000000000000000000000000000000000000000008e53"
    ]
    
    let fetchPageThreeFrames = [
        "017b0700801309112610007b08009e1409112915007b000080000a11001000070000029429110000006e291105000000000000000294015634013e300000000000",
        "02000000013e00000003000000000000000000000000000000000000007b010080010a11020c007b020080040a11080d007b030080060a110c10007b0400800a0a",
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    ]
    
    let fetchPageFourFrames = [
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    ]
}