//
//  LocationServiceTests.swift
//  AutoCatCoreTests
//
//  Created by Selim Mustafaev on 01.08.2024.
//  Copyright © 2024 Selim Mustafaev. All rights reserved.
//

import Testing
import CoreLocation
import Mockable
import Intents
import Contacts
@testable import AutoCatCore

@MainActor
struct LocationServiceTests {
    
    let latitude: CLLocationDegrees = 10
    let longitude: CLLocationDegrees = 10
    let address = "Test Address"
    
    let location: CLLocation
    
    let geocoderMock = MockGeocoderProtocol()
    let locationManagerMock = MockSwiftLocationProtocol()
    let settingsServiceMock = MockSettingsServiceProtocol()
    let locationService: LocationService
    
    init() {
        
        self.location = CLLocation(latitude: latitude, longitude: longitude)
        
        self.locationService = LocationService(geocoder: geocoderMock,
                                               locationManager: locationManagerMock,
                                               settingsService: settingsServiceMock)
        
        given(settingsServiceMock)
            .user.willReturn(User())
    }

    @Test
    func getValidAddress() async throws {
        
        let placemark = CLPlacemark(location: location, name: address, postalAddress: nil)
        
        given(geocoderMock)
            .reverseGeocodeLocation(.any)
            .willReturn([placemark])
        
        let result = try await locationService.getAddressForLocation(latitude: latitude,
                                                                     longitude: longitude)
        
        verify(geocoderMock)
            .reverseGeocodeLocation(.any)
            .called(.once)
        
        #expect(result == address)
    }

    @Test
    func getNilAddress() async throws {
        
        let placemark = CLPlacemark(location: location, name: nil, postalAddress: nil)
        
        given(geocoderMock)
            .reverseGeocodeLocation(.any)
            .willReturn([placemark])
        
        await #expect(throws: LocationError.reverseGeocode) {
            _ = try await locationService.getAddressForLocation(latitude: latitude,
                                                                longitude: longitude)
        }
        
        verify(geocoderMock)
            .reverseGeocodeLocation(.any)
            .called(.once)
    }
    
    @Test
    func addressNotFound() async throws {
        
        given(geocoderMock)
            .reverseGeocodeLocation(.any)
            .willReturn([])
        
        await #expect(throws: LocationError.reverseGeocode) {
            _ = try await locationService.getAddressForLocation(latitude: latitude,
                                                                longitude: longitude)
        }
        
        verify(geocoderMock)
            .reverseGeocodeLocation(.any)
            .called(.once)
    }
    
    @Test("Get location: denied")
    func getLocationDenied() async throws {
        
        given(locationManagerMock)
            .authorizationStatus
            .willReturn(.denied)
        
        await #expect(throws: CLError(.denied)) {
            _ = try await locationService.requestCurrentLocation()
        }
    }
    
    @Test("Get location: not determined -> denied")
    func getLocationNotDeterminedDenied() async throws {
        
        given(locationManagerMock)
            .authorizationStatus
            .willReturn(.notDetermined)
        
        given(locationManagerMock)
            .requestPermission(.value(.always))
            .willReturn(.denied)
        
        when(locationManagerMock)
            .requestPermission(.value(.always))
            .perform {
                given(locationManagerMock)
                    .authorizationStatus
                    .willReturn(.denied)
            }
        
        await #expect(throws: CLError(.denied)) {
            _ = try await locationService.requestCurrentLocation()
        }
    }
    
    @Test("Get location: not determined -> allow")
    func getLocationNotDeterminedAllow() async throws {
        
        given(locationManagerMock)
            .authorizationStatus
            .willReturn(.notDetermined)
        
        given(locationManagerMock)
            .requestPermission(.value(.always))
            .willReturn(.authorizedWhenInUse)
        
        when(locationManagerMock)
            .requestPermission(.value(.always))
            .perform {
                given(locationManagerMock)
                    .authorizationStatus
                    .willReturn(.authorizedWhenInUse)
            }
        
        given(locationManagerMock)
            .requestLocation(accuracy: .any, timeout: .any)
            .willReturn(.didUpdateLocations([location]))
        
        let event = try await locationService.requestCurrentLocation()
        
        #expect(event.latitude == latitude)
        #expect(event.longitude == longitude)
    }
    
    @Test("Get location: normal")
    func getLocationNormal() async throws {
        
        given(locationManagerMock)
            .authorizationStatus
            .willReturn(.authorizedWhenInUse)
        
        given(locationManagerMock)
            .requestLocation(accuracy: .any, timeout: .any)
            .willReturn(.didUpdateLocations([location]))
        
        let event = try await locationService.requestCurrentLocation()
        
        #expect(event.latitude == latitude)
        #expect(event.longitude == longitude)
    }
    
    @Test("Get location: no location")
    func getLocationNone() async throws {
        
        given(locationManagerMock)
            .authorizationStatus
            .willReturn(.authorizedWhenInUse)
        
        given(locationManagerMock)
            .requestLocation(accuracy: .any, timeout: .any)
            .willReturn(.didUpdateLocations([]))
        
        await #expect(throws: LocationError.generic) {
            _ = try await locationService.requestCurrentLocation()
        }
    }
    
    @Test("Get location: parallel requests")
    func getLocationParallel() async throws {
        
        given(locationManagerMock)
            .authorizationStatus
            .willReturn(.authorizedWhenInUse)
        
        given(locationManagerMock)
            .requestLocation(accuracy: .any, timeout: .any)
            .willReturn(.didUpdateLocations([location]))
        
        async let task1 = locationService.requestCurrentLocation()
        async let task2 = locationService.requestCurrentLocation()
        
        try await Task.sleep(nanoseconds: 500_000_000)
        async let task3 = locationService.requestCurrentLocation()
        
        let (event1, event2, event3) = try await (task1, task2, task3)
        
        verify(locationManagerMock)
            .requestLocation(accuracy: .any, timeout: .any)
            .called(.exactly(2))
        
        #expect(event1.latitude == latitude)
        #expect(event1.longitude == longitude)
        #expect(event2.latitude == latitude)
        #expect(event2.longitude == longitude)
        #expect(event3.latitude == latitude)
        #expect(event3.longitude == longitude)
    }
}