package com.mailserver.controller;

import com.mailserver.config.MailDomains;
import com.mailserver.domain.User;
import com.mailserver.service.MailDirectory;
import com.mailserver.service.MailLists;
import com.mailserver.service.UserService;
import org.junit.jupiter.api.Test;
import org.springframework.http.HttpStatus;
import org.springframework.web.server.ResponseStatusException;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;

import java.util.List;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.catchThrowable;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyLong;
import static org.mockito.ArgumentMatchers.anyString;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

/** Service API for Jambotron: token only; account created once with a password; switched off → out of the lists. */
class ServiceControllerTest {

    private static final String AUTH = "Bearer s3cret-token";

    private final UserService users = mock(UserService.class);
    private final MailLists lists = mock(MailLists.class);
    private final MailDomains domains = new MailDomains("jambocheck.com", "");
    private final com.mailserver.service.MailboxAccess access = mock(com.mailserver.service.MailboxAccess.class);
    private final MailDirectory directory = new MailDirectory(users, lists, domains, access);
    private final User existing = user(7L, "jambotronpw@jambocheck.com");
    private final com.mailserver.config.MailAdmins admins = new com.mailserver.config.MailAdmins("", "", domains);

    ServiceControllerTest() {
        when(users.findOptional(anyString())).thenReturn(Mono.empty());
        when(users.findOptional("jambotronpw@jambocheck.com")).thenReturn(Mono.just(existing));
        when(lists.exists(anyString())).thenReturn(Mono.just(false));
        when(lists.listsOf(anyLong())).thenReturn(Flux.just("alerts-prod@jambocheck.com"));
        when(lists.removeEverywhere(anyLong())).thenReturn(Mono.just(1L));
        when(access.removeEverywhere(anyLong())).thenReturn(Mono.just(1L));
        when(users.register(anyString(), anyString(), any())).thenAnswer(i -> Mono.just(user(8L, i.getArgument(0))));
        when(users.setActive(any(), any(Boolean.class))).thenAnswer(i -> {
            User u = i.getArgument(0);
            u.setActive(i.getArgument(1));
            return Mono.just(u);
        });
        when(users.setPassword(any(), anyString())).thenAnswer(i -> Mono.just((User) i.getArgument(0)));
        when(users.setAdmin(any(), any(Boolean.class))).thenAnswer(i -> {
            User u = i.getArgument(0);
            u.setAdmin(i.getArgument(1));
            return Mono.just(u);
        });
    }

    // Jambotron ADMIN → mail administrator (Settings → MAILBOXES), and back
    @Test
    void jambotronMakesAMailboxAdministratorAndTakesItBack() {
        assertThat(admins.isAdmin("jambotronpw@jambocheck.com")).isFalse();
        var made = api("s3cret-token").saveAccount(AUTH, "jambotronpw@jambocheck.com",
                Mono.just(new ServiceController.AccountRequest(null, true, true))).block();
        assertThat(made.getBody().account().admin()).isTrue();
        assertThat(admins.isAdmin("JambotronPW@jambocheck.com")).isTrue();

        api("s3cret-token").saveAccount(AUTH, "jambotronpw@jambocheck.com",
                Mono.just(new ServiceController.AccountRequest(null, true, false))).block();
        assertThat(admins.isAdmin("jambotronpw@jambocheck.com")).isFalse();
        assertThat(admins.isAdmin("admin@jambocheck.com")).isTrue();
    }

    private ServiceController api(String token) {
        return new ServiceController(token, users, lists, directory, access, admins);
    }

    @Test
    void offWithoutTokenWrongTokenRefused() {
        assertThat(status(() -> api("").account(AUTH, "jambotronpw@jambocheck.com"))).isEqualTo(HttpStatus.NOT_FOUND);
        assertThat(status(() -> api("s3cret-token").account("Bearer nope", "jambotronpw@jambocheck.com"))).isEqualTo(HttpStatus.UNAUTHORIZED);
        assertThat(status(() -> api("s3cret-token").account(null, "jambotronpw@jambocheck.com"))).isEqualTo(HttpStatus.UNAUTHORIZED);
        assertThat(api("s3cret-token").account(AUTH, "jambotronpw@jambocheck.com").block().lists())
                .containsExactly("alerts-prod@jambocheck.com");
    }

    @Test
    void newAccountGetsPasswordOnceExistingDoesNot() {
        var created = api("s3cret-token").saveAccount(AUTH, "moder@jambocheck.com",
                Mono.just(new ServiceController.AccountRequest("Moder", true, null))).block();
        assertThat(created.getStatusCode().value()).isEqualTo(201);
        assertThat(created.getBody().password()).hasSizeGreaterThan(20);

        var again = api("s3cret-token").saveAccount(AUTH, "jambotronpw@jambocheck.com",
                Mono.just(new ServiceController.AccountRequest(null, null, null))).block();
        assertThat(again.getStatusCode().value()).isEqualTo(200);
        assertThat(again.getBody().password()).isNull();
        verify(lists, never()).removeEverywhere(anyLong());

        assertThat(status(() -> api("s3cret-token").saveAccount(AUTH, "x@gmail.com", Mono.empty()))).isEqualTo(HttpStatus.BAD_REQUEST);
    }

    @Test
    void switchedOffLeavesEveryList() {
        var off = api("s3cret-token").saveAccount(AUTH, "jambotronpw@jambocheck.com",
                Mono.just(new ServiceController.AccountRequest(null, false, null))).block();
        assertThat(off.getBody().account().active()).isFalse();
        verify(lists).removeEverywhere(7L);
        verify(access).removeEverywhere(7L);

        var reset = api("s3cret-token").password(AUTH, "jambotronpw@jambocheck.com").block();
        assertThat(reset.password()).isNotBlank();
        verify(users).setPassword(existing, reset.password());
    }

    private static HttpStatus status(Runnable call) {
        Throwable error = catchThrowable(call::run);
        assertThat(error).isInstanceOf(ResponseStatusException.class);
        return HttpStatus.valueOf(((ResponseStatusException) error).getStatusCode().value());
    }

    private static User user(Long id, String email) {
        User user = new User();
        user.setId(id);
        user.setEmail(email);
        user.setPassword("hash");
        return user;
    }
}