//
//  APIClient+RequestTests.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 APIClientRequestTests: XCTestCase {

    // MARK: Properties
    
    private let makeURLRequest = MakeURLRequestUseCase()
    private let dateFormatter = DateFormatter.iso8601
    private let sessionConfiguration = {
        let configuration = URLSessionConfiguration.default

        configuration.protocolClasses = [MockURLProtocol.self]
        
        return configuration
    }()

    private var client: APIClient!
    private var url: URL!
    private var data: Data!

    // MARK: Setup
    
    override func setUp() async throws {
        client = .init(configuration: sessionConfiguration)
    }
    
    // MARK: Request cases
    
    func test_withSomeEndpoint_andSomeModel_whenResponseStatusOk() async throws {
        // GIVEN
        let endpoint = GetMeEndpoint(
            username: "username",
            password: "password"
        )
        
        url = try makeURLRequest(endpoint: endpoint).url
        data = "{\"firstName\":\"Noel\",\"lastName\":\"Flantier\",\"rootItem\":{\"id\":\"4b8e41fd4a6a89712f15bbf102421b9338cfab11\",\"parentId\":\"\",\"name\":\"dossierTest\",\"isDir\":true,\"modificationDate\":\"2021-11-29T10:57:13Z\"}}\n".data(using: .utf8)
        
        MockURLProtocol.mockData[url] = MockURLResponse(
            status: .ok,
            headers: [:],
            data: data
        )
        
        // WHEN
        let result = try await client.request(endpoint: endpoint, model: Me.self)

        // THEN
        XCTAssertEqual(result, Me(
            firstName: "Noel",
            lastName: "Flantier",
            rootItem: .init(
                idParent: "",
                id: "4b8e41fd4a6a89712f15bbf102421b9338cfab11",
                name: "dossierTest",
                isDirectory: true,
                lastModifiedAt: dateFormatter.date(from: "2021-11-29T10:57:13Z")!,
                size: nil,
                contentType: nil
            )
        ))
    }
    
    func test_withSomeEndpoint_andSomeModel_whenResponseStatusCreated() async throws {
        // GIVEN
        let endpoint = GetMeEndpoint(
            username: "username",
            password: "password"
        )
        
        url = try makeURLRequest(endpoint: endpoint).url
        data = "{\"firstName\":\"Noel\",\"lastName\":\"Flantier\",\"rootItem\":{\"id\":\"4b8e41fd4a6a89712f15bbf102421b9338cfab11\",\"parentId\":\"\",\"name\":\"dossierTest\",\"isDir\":true,\"modificationDate\":\"2021-11-29T10:57:13Z\"}}\n".data(using: .utf8)
        
        MockURLProtocol.mockData[url] = MockURLResponse(
            status: .created,
            headers: [:],
            data: data
        )
        
        // WHEN
        let result = try await client.request(endpoint: endpoint, model: Me.self)
        
        // THEN
        XCTAssertEqual(result, Me(
            firstName: "Noel",
            lastName: "Flantier",
            rootItem: .init(
                idParent: "",
                id: "4b8e41fd4a6a89712f15bbf102421b9338cfab11",
                name: "dossierTest",
                isDirectory: true,
                lastModifiedAt: dateFormatter.date(from: "2021-11-29T10:57:13Z")!,
                size: nil,
                contentType: nil
            )
        ))
    }
    
    func test_withSomeEndpoint_andSomeModel_whenResponseStatusNoContent() async throws {
        // GIVEN
        let endpoint = GetMeEndpoint(
            username: "username",
            password: "password"
        )
        
        url = try makeURLRequest(endpoint: endpoint).url
        
        MockURLProtocol.mockData[url] = MockURLResponse(
            status: .noContent,
            headers: [:],
            data: nil
        )
        
        // WHEN & THEN
        do {
            _ = try await client.request(endpoint: endpoint, model: Me.self)
        } catch APIClientError.notSupported {
            XCTAssertTrue(true)
        } catch {
            XCTAssertTrue(false)
        }
    }
    
    func test_withSomeEndpoint_andSomeModel_whenResponseStatusBadRequest() async throws {
        // GIVEN
        let endpoint = GetMeEndpoint(
            username: "username",
            password: "password"
        )
        
        url = try makeURLRequest(endpoint: endpoint).url
        
        MockURLProtocol.mockData[url] = MockURLResponse(
            status: .badRequest,
            headers: [:],
            data: nil
        )
        
        // WHEN & THEN
        do {
            _ = try await client.request(endpoint: endpoint, model: Me.self)
        } catch APIClientError.itemAlreadyExist {
            XCTAssertTrue(true)
        } catch {
            XCTAssertTrue(false)
        }
    }
    
    func test_withSomeEndpoint_andSomeModel_whenResponseStatusForbidden() async throws {
        // GIVEN
        let endpoint = GetMeEndpoint(
            username: "username",
            password: "password"
        )
        
        url = try makeURLRequest(endpoint: endpoint).url
        
        MockURLProtocol.mockData[url] = MockURLResponse(
            status: .forbidden,
            headers: [:],
            data: nil
        )
        
        // WHEN & THEN
        do {
            _ = try await client.request(endpoint: endpoint, model: Me.self)
        } catch APIClientError.authenticationFailed {
            XCTAssertTrue(true)
        } catch {
            XCTAssertTrue(false)
        }
    }
    
    func test_withSomeEndpoint_andSomeModel_whenResponseStatusNotFound() async throws {
        // GIVEN
        let endpoint = GetMeEndpoint(
            username: "username",
            password: "password"
        )
        
        url = try makeURLRequest(endpoint: endpoint).url
        
        MockURLProtocol.mockData[url] = MockURLResponse(
            status: .notFound,
            headers: [:],
            data: nil
        )
        
        // WHEN & THEN
        do {
            _ = try await client.request(endpoint: endpoint, model: Me.self)
        } catch APIClientError.itemDoesNotExist {
            XCTAssertTrue(true)
        } catch {
            XCTAssertTrue(false)
        }
    }
    
    func test_withSomeEndpoint_andSomeModel_whenResponseDataIncorrect() async throws {
        // GIVEN
        let endpoint = GetMeEndpoint(
            username: "username",
            password: "password"
        )
        
        url = try makeURLRequest(endpoint: endpoint).url
        data = "{\"firstName\":\"Noel\",\"lastName\":\"Flantier\",\"rootItem\":{\"id\":\"4b8e41fd4a6a89712f15bbf102421b9338cfab11\"\"isDir\":true}}\n".data(using: .utf8)
        
        MockURLProtocol.mockData[url] = MockURLResponse(
            status: .ok,
            headers: [:],
            data: data
        )
        
        // WHEN & THEN
        do {
            _ = try await client.request(endpoint: endpoint, model: Me.self)
        } catch is DecodingError {
            XCTAssertTrue(true)
        } catch {
            XCTAssertTrue(false)
        }
    }
    
    func test_withSomeEndpoint_whenResponseStatusOk() async throws {
        // GIVEN
        let endpoint = GetDataEndpoint(
            itemId: UUID().uuidString,
            username: "username",
            password: "password"
        )
        
        url = try makeURLRequest(endpoint: endpoint).url
        data = "This is just some dummy data for testing purposes".data(using: .utf8)
        
        MockURLProtocol.mockData[url] = MockURLResponse(
            status: .ok,
            headers: [:],
            data: data
        )
        
        // WHEN
        let result = try await client.request(endpoint: endpoint)
        
        // THEN
        XCTAssertEqual(result, data)
    }
    
    func test_withSomeEndpoint_whenResponseStatusCreated() async throws {
        // GIVEN
        let endpoint = GetDataEndpoint(
            itemId: UUID().uuidString,
            username: "username",
            password: "password"
        )
        
        url = try makeURLRequest(endpoint: endpoint).url
        
        MockURLProtocol.mockData[url] = MockURLResponse(
            status: .created,
            headers: [:],
            data: nil
        )
        
        // WHEN & THEN
        do {
            try await client.request(endpoint: endpoint)
        } catch APIClientError.notSupported {
            XCTAssertTrue(true)
        } catch {
            XCTAssertTrue(false)
        }
    }
    
    func test_withSomeEndpoint_whenResponseStatusNoContent() async throws {
        // GIVEN
        let endpoint = GetDataEndpoint(
            itemId: UUID().uuidString,
            username: "username",
            password: "password"
        )
        
        url = try makeURLRequest(endpoint: endpoint).url
        data = .init()
        
        MockURLProtocol.mockData[url] = MockURLResponse(
            status: .noContent,
            headers: [:],
            data: nil
        )
        
        // WHEN
        let result = try await client.request(endpoint: endpoint)
        
        // THEN
        XCTAssertEqual(result, data)
    }
    
    func test_withSomeEndpoint_whenResponseStatusBadRequest() async throws {
        // GIVEN
        let endpoint = GetDataEndpoint(
            itemId: UUID().uuidString,
            username: "username",
            password: "password"
        )
        
        url = try makeURLRequest(endpoint: endpoint).url
        
        MockURLProtocol.mockData[url] = MockURLResponse(
            status: .badRequest,
            headers: [:],
            data: nil
        )
        
        // WHEN & THEN
        do {
            try await client.request(endpoint: endpoint)
        } catch APIClientError.itemIsNotFile {
            XCTAssertTrue(true)
        } catch {
            XCTAssertTrue(false)
        }
    }
    
    func test_withSomeEndpoint_whenResponseStatusForbidden() async throws {
        // GIVEN
        let endpoint = GetDataEndpoint(
            itemId: UUID().uuidString,
            username: "username",
            password: "password"
        )
        
        url = try makeURLRequest(endpoint: endpoint).url
        
        MockURLProtocol.mockData[url] = MockURLResponse(
            status: .forbidden,
            headers: [:],
            data: nil
        )
        
        // WHEN & THEN
        do {
            try await client.request(endpoint: endpoint)
        } catch APIClientError.authenticationFailed {
            XCTAssertTrue(true)
        } catch {
            XCTAssertTrue(false)
        }
    }
    
    func test_withSomeEndpoint_whenResponseStatusNotFound() async throws {
        // GIVEN
        let endpoint = GetDataEndpoint(
            itemId: UUID().uuidString,
            username: "username",
            password: "password"
        )
        
        url = try makeURLRequest(endpoint: endpoint).url
        
        MockURLProtocol.mockData[url] = MockURLResponse(
            status: .notFound,
            headers: [:],
            data: nil
        )
        
        // WHEN & THEN
        do {
            try await client.request(endpoint: endpoint)
        } catch APIClientError.itemDoesNotExist {
            XCTAssertTrue(true)
        } catch {
            XCTAssertTrue(false)
        }
    }
    
}