import Hummingbird
import HummingbirdTesting
import NIOCore
import Testing

@testable import Web

@Suite("addController method")
struct RouterMethodsTests {

    // MARK: Functional tests

    @Test
    func `adds the routes of every listed controller`() async throws {
        let router = Router()

        router.addController {
            StubController(path: "first")
            StubController(path: "second")
        }

        try await Application(router: router).test(.router) { client in
            try await client.execute(
                uri: "/first",
                method: .get
            ) { response in
                #expect(response.status == .ok)
                #expect(String(buffer: response.body) == "first")
            }

            try await client.execute(
                uri: "/second",
                method: .get
            ) { response in
                #expect(response.status == .ok)
                #expect(String(buffer: response.body) == "second")
            }
        }
    }

    @Test(arguments: [true, false])
    func `adds a controller behind a condition only when the condition holds`(
        condition: Bool
    ) async throws {
        let router = Router()

        router.addController {
            StubController(path: "always")

            if condition {
                StubController(path: "conditional")
            }
        }

        try await Application(router: router).test(.router) { client in
            try await client.execute(
                uri: "/always",
                method: .get
            ) { response in
                #expect(response.status == .ok)
            }

            try await client.execute(
                uri: "/conditional",
                method: .get
            ) { response in
                #expect(response.status == (condition ? .ok : .notFound))
            }
        }
    }

    @Test(arguments: [true, false])
    func `adds only the taken branch of a condition`(
        takesFirst: Bool
    ) async throws {
        let router = Router()

        router.addController {
            if takesFirst {
                StubController(path: "first")
            } else {
                StubController(path: "second")
            }
        }

        try await Application(router: router).test(.router) { client in
            try await client.execute(
                uri: "/first",
                method: .get
            ) { response in
                #expect(response.status == (takesFirst ? .ok : .notFound))
            }

            try await client.execute(
                uri: "/second",
                method: .get
            ) { response in
                #expect(response.status == (takesFirst ? .notFound : .ok))
            }
        }
    }

    @Test
    func `adds a controller for every iteration of a loop`() async throws {
        let paths = ["one", "two", "three"]
        let router = Router()

        router.addController {
            for path in paths {
                StubController(path: path)
            }
        }

        try await Application(router: router).test(.router) { client in
            for path in paths {
                try await client.execute(
                    uri: "/\(path)",
                    method: .get
                ) { response in
                    #expect(response.status == .ok)
                    #expect(String(buffer: response.body) == path)
                }
            }
        }
    }

    @Test
    func `returns the router so calls can be chained`() async throws {
        let router = Router()

        router
            .addController {
                StubController(path: "first")
            }
            .addController {
                StubController(path: "second")
            }

        try await Application(router: router).test(.router) { client in
            try await client.execute(
                uri: "/first",
                method: .get
            ) { response in
                #expect(response.status == .ok)
            }

            try await client.execute(
                uri: "/second",
                method: .get
            ) { response in
                #expect(response.status == .ok)
            }
        }
    }

}