// The MIT License
//
// Original work sponsored and donated by The Danish Health Data Authority (http://www.sundhedsdatastyrelsen.dk)
//
// Copyright (C) 2020 The Danish Health Data Authority (http://www.sundhedsdatastyrelsen.dk)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
// of the Software, and to permit persons to whom the Software is furnished to do
// so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

import Combine
import XCTest
import CMSData
import ErrorData
import HTTPMockHelpers
@testable import CMSServices

final class ArticlesServiceImplTests: CMSURLSessionMockTestCase {
    private let articlesService = ArticlesServiceImpl()

    private let category = [
        CMSData.Category(
            id: 0,
            name: "Test 1",
            slug: "test",
            description: "Description 1",
            iconUrl: nil,
            articles: []
        )
    ]

    private let recommendedCategories =
    RecommendedCategories(
        current: [
            CMSData.Category(
                id: 0,
                name: "Test 2",
                slug: "test",
                description: "Description 2",
                iconUrl: nil,
                articles: []
            )
        ],
        next: [
            CMSData.Category(
                id: 0,
                name: "Test 3",
                slug: "test",
                description: "Description 3",
                iconUrl: nil,
                articles: []
            )
        ]
    )
    
    private let searchResults = [
        CMSData.SearchResultDTO(
            id: 123,
            title: "title",
            sortPoints: 3,
            categoryName: "cat",
            categoryId: 321,
            categoryIcon: "icon",
            tagTitle: "tag title",
            content: "content...",
            weeks: nil,
            articleId: nil,
            articleName: nil
        )
    ]
    
    func testFetchArticleCategories() {
        let url = URL(string: "\(Self.config.cmsBaseUrl)/post")!
        URLSessionStubResults.resultsForUrls[url] = .dataResponse(
            data: try! JSONEncoder.iso8601().encode(category),
            response:  URLSessionStubResponses.response(url: url)!
        )

        assertCategoriesPublisher(articlesService.fetchArticleCategories())
    }

    func testFetchArticleCategoriesForWeek() {
        let url = URL(string: "\(Self.config.cmsBaseUrl)/week-v2/35")!
        URLSessionStubResults.resultsForUrls[url] = .dataResponse(
            data: try! JSONEncoder.iso8601().encode(recommendedCategories),
            response:  URLSessionStubResponses.response(url: url)!
        )

        assertRecommendedCategoriesPublisher(articlesService.fetchArticleCategories(for: 35))
    }

    func testSearch() {
        let url = URL(string: "\(Self.config.cmsBaseUrl)/search-new?q=my%20query")!
        URLSessionStubResults.resultsForUrls[url] = .dataResponse(
            data: try! JSONEncoder.iso8601().encode(searchResults),
            response:  URLSessionStubResponses.response(url: url)!
        )

        assertSearchResultPublisher(articlesService.search(query: "my query"))
    }

    private func assertCategoriesPublisher(_ publisher: AnyPublisher<[CMSData.Category], ServiceError>) {
        let expect = XCTestExpectation()
        publisher
            .sink(
                receiveCompletion: { self.handleSubscriberCompletion($0, expectation: expect) },
                receiveValue: { categories in
                    XCTAssertEqual(categories.count, 1)
                }
            )
            .store(in: &cancelBag)
        wait(for: [expect], timeout: 1.0)
    }
    
    private func assertSearchResultPublisher(_ publisher: AnyPublisher<[SearchResultDomain], ServiceError>) {
        let expect = XCTestExpectation()
        publisher
            .sink(
                receiveCompletion: { self.handleSubscriberCompletion($0, expectation: expect) },
                receiveValue: { results in
                    XCTAssertEqual(results.count, 1)
                }
            )
            .store(in: &cancelBag)
        wait(for: [expect], timeout: 10.0)
    }
    
    private func assertRecommendedCategoriesPublisher(_ publisher: AnyPublisher<CMSData.RecommendedCategories, ServiceError>) {
        let expect = XCTestExpectation()
        publisher
            .sink(
                receiveCompletion: { self.handleSubscriberCompletion($0, expectation: expect) },
                receiveValue: { recommended in
                    XCTAssertEqual(recommended.currentWeek.count, 1)
                    XCTAssertEqual(recommended.nextWeek?.count, 1)
                }
            )
            .store(in: &cancelBag)
        wait(for: [expect], timeout: 5.0)
    }
}