//
//  APIService+GetItemsTests.swift
//  APIServiceTests
//
//  Created by Javier Cicchelli on 04/12/2022.
//  Copyright © 2022 Röck+Cöde. All rights reserved.
//

import Foundation
import XCTest

@testable import APIService

final class APIServiceGetItemsTests: XCTestCase {

    // MARK: Properties
    
    private let dateFormatter = DateFormatter.isoZulu
    private let sessionConfiguration = {
        let configuration = URLSessionConfiguration.default
        
        configuration.protocolClasses = [MockURLProtocol.self]
        
        return configuration
    }()
    
    private let itemId = UUID().uuidString
    private let url = URL(string: "http://163.172.147.216:8080/items/")!
    
    private var service: APIService!
    private var data: Data!
    private var result: [Item]!

    // MARK: Setup
    
    override func setUp() async throws {
        service = .init(configuration: sessionConfiguration)
    }
    
    override func tearDown() async throws {
        service = nil
    }
    
    // MARK: Test cases
    
    func test_withExistingId_andRightCredentials_whenDataArrayPopulated() async throws {
        // GIVEN
        data = "[{\"id\":\"a077432ceb69b4f2dcbd4932d3ec63c3a4f14784\",\"parentId\":\"4b8e41fd4a6a89712f15bbf102421b9338cfab11\",\"name\":\"Tokyo\",\"isDir\":true,\"modificationDate\":\"2022-11-25T17:33:57.095027128Z\"},{\"id\":\"f5d351f7e532cae7c7be28488564b567ffeb425a\",\"parentId\":\"4b8e41fd4a6a89712f15bbf102421b9338cfab11\",\"name\":\"Meme.jpg\",\"isDir\":false,\"size\":43144,\"contentType\":\"image/jpeg\",\"modificationDate\":\"2022-12-01T15:24:12.29816675Z\"}]\n".data(using: .utf8)
        
        MockURLProtocol.mockData[url.appendingPathComponent(itemId)] = MockURLResponse(
            status: .ok,
            headers: [.Header.Keys.contentType: .Header.Values.contentTypeJSON],
            data: data
        )
        
        // WHEN
        result = try await service.getItems(
            id: itemId,
            credentials: .init(
                username: "username",
                password: "password"
            )
        )
        
        // THEN
        XCTAssertEqual(result, [
            .init(
                idParent: "4b8e41fd4a6a89712f15bbf102421b9338cfab11",
                id: "a077432ceb69b4f2dcbd4932d3ec63c3a4f14784",
                name: "Tokyo",
                isDirectory: true,
                lastModifiedAt: dateFormatter.date(from: "2022-11-25T17:33:57.095027128Z")!,
                size: nil,
                contentType: nil
            ),
            .init(
                idParent: "4b8e41fd4a6a89712f15bbf102421b9338cfab11",
                id: "f5d351f7e532cae7c7be28488564b567ffeb425a",
                name: "Meme.jpg",
                isDirectory: false,
                lastModifiedAt: dateFormatter.date(from: "2022-12-01T15:24:12.29816675Z")!,
                size: 43144,
                contentType: "image/jpeg"
            ),
        ])
    }
    
    func test_withExistingId_andRightCredentials_whenDataArrayEmpty() async throws {
        // GIVEN
        data = "[]".data(using: .utf8)
        
        MockURLProtocol.mockData[url.appendingPathComponent(itemId)] = MockURLResponse(
            status: .ok,
            headers: [.Header.Keys.contentType: .Header.Values.contentTypeJSON],
            data: data
        )
        
        // WHEN
        result = try await service.getItems(
            id: itemId,
            credentials: .init(
                username: "username",
                password: "password"
            )
        )
        
        // THEN
        XCTAssertEqual(result, [])
    }
    
    func test_withExistingId_andWrongCredentials() async throws {
        // GIVEN
        MockURLProtocol.mockData[url.appendingPathComponent(itemId)] = MockURLResponse(
            status: .unauthorized,
            headers: [:],
            data: nil
        )
        
        // WHEN & THEN
        do {
            _ = try await service.getItems(
                id: itemId,
                credentials: .init(
                    username: "usrname",
                    password: "passwrd"
                )
            )
        } catch APIClientError.authenticationFailed {
            XCTAssertTrue(true)
        } catch {
            XCTAssertTrue(false)
        }
    }
    
    func test_withNonExistingId_andRightCredentials() async throws {
        // GIVEN
        MockURLProtocol.mockData[url.appendingPathComponent("xxx")] = MockURLResponse(
            status: .notFound,
            headers: [:],
            data: nil
        )
        
        // WHEN & THEN
        do {
            _ = try await service.getItems(
                id: "xxx",
                credentials: .init(
                    username: "usrname",
                    password: "passwrd"
                )
            )
        } catch APIClientError.itemDoesNotExist {
            XCTAssertTrue(true)
        } catch {
            XCTAssertTrue(false)
        }
    }
    
    func test_withEmptyId_andRightCredentials() async throws {
        // GIVEN
        MockURLProtocol.mockData[url.appendingPathComponent("")] = MockURLResponse(
            status: .notFound,
            headers: [:],
            data: nil
        )
        
        // WHEN & THEN
        do {
            _ = try await service.getItems(
                id: "",
                credentials: .init(
                    username: "usrname",
                    password: "passwrd"
                )
            )
        } catch APIClientError.itemDoesNotExist {
            XCTAssertTrue(true)
        } catch {
            XCTAssertTrue(false)
        }
    }

}