import { Test, TestingModule } from "@nestjs/testing";
import { getRepositoryToken } from "@nestjs/typeorm";
import {
  NotFoundException,
  BadRequestException,
  ForbiddenException,
} from "@nestjs/common";
import { AppointmentsService } from "./appointments.service";
import { Appointment } from "../../entities/appointment.entity";
import { AppointmentParticipant } from "../../entities/appointment-participant.entity";
import { Group } from "../../entities/group.entity";
import { GroupMember } from "../../entities/group-member.entity";
import { Game } from "../../entities/game.entity";
import { User } from "../../entities/user.entity";
import { CacheService } from "../../common/services/cache.service";

enum AppointmentStatus {
  PENDING = "pending",
  CONFIRMED = "confirmed",
  CANCELLED = "cancelled",
  COMPLETED = "completed",
}

describe("AppointmentsService", () => {
  let service: AppointmentsService;
  let mockAppointmentRepository: any;
  let mockParticipantRepository: any;
  let mockGroupRepository: any;
  let mockGroupMemberRepository: any;
  let mockGameRepository: any;
  let mockUserRepository: any;

  const mockUser = { id: "user-1", username: "testuser" };
  const mockGroup = { id: "group-1", name: "测试小组", isActive: true };
  const mockGame = { id: "game-1", name: "测试游戏" };
  const mockMembership = {
    id: "member-1",
    userId: "user-1",
    groupId: "group-1",
    role: "member",
    isActive: true,
  };

  const mockAppointment = {
    id: "appointment-1",
    groupId: "group-1",
    gameId: "game-1",
    creatorId: "user-1",
    title: "周末开黑",
    description: "描述",
    startTime: new Date("2024-01-20T19:00:00Z"),
    endTime: new Date("2024-01-20T23:00:00Z"),
    maxParticipants: 5,
    status: AppointmentStatus.PENDING,
    createdAt: new Date(),
    updatedAt: new Date(),
  };

  const mockParticipant = {
    id: "participant-1",
    appointmentId: "appointment-1",
    userId: "user-1",
    status: "accepted",
    joinedAt: new Date(),
  };

  beforeEach(async () => {
    mockAppointmentRepository = {
      create: jest.fn(),
      save: jest.fn(),
      findOne: jest.fn(),
      remove: jest.fn(),
      createQueryBuilder: jest.fn(),
    };

    mockParticipantRepository = {
      create: jest.fn(),
      save: jest.fn(),
      findOne: jest.fn(),
      find: jest.fn(),
      count: jest.fn(),
      remove: jest.fn(),
      createQueryBuilder: jest.fn(),
    };

    mockGroupRepository = {
      findOne: jest.fn(),
    };

    mockGroupMemberRepository = {
      findOne: jest.fn(),
      find: jest.fn(),
    };

    mockGameRepository = {
      findOne: jest.fn(),
    };

    mockUserRepository = {
      findOne: jest.fn(),
    };

    const mockCacheService = {
      get: jest.fn(),
      set: jest.fn(),
      del: jest.fn(),
      clear: jest.fn(),
      clearByPrefix: jest.fn(),
    };

    const module: TestingModule = await Test.createTestingModule({
      providers: [
        AppointmentsService,
        {
          provide: getRepositoryToken(Appointment),
          useValue: mockAppointmentRepository,
        },
        {
          provide: getRepositoryToken(AppointmentParticipant),
          useValue: mockParticipantRepository,
        },
        {
          provide: getRepositoryToken(Group),
          useValue: mockGroupRepository,
        },
        {
          provide: getRepositoryToken(GroupMember),
          useValue: mockGroupMemberRepository,
        },
        {
          provide: getRepositoryToken(Game),
          useValue: mockGameRepository,
        },
        {
          provide: getRepositoryToken(User),
          useValue: mockUserRepository,
        },
        {
          provide: CacheService,
          useValue: mockCacheService,
        },
      ],
    }).compile();

    service = module.get<AppointmentsService>(AppointmentsService);
  });

  describe("create", () => {
    it("应该成功创建预约", async () => {
      mockGroupRepository.findOne.mockResolvedValue(mockGroup);
      mockGroupMemberRepository.findOne.mockResolvedValue(mockMembership);
      mockGameRepository.findOne.mockResolvedValue(mockGame);
      mockAppointmentRepository.create.mockReturnValue(mockAppointment);
      mockAppointmentRepository.save.mockResolvedValue(mockAppointment);
      mockParticipantRepository.create.mockReturnValue(mockParticipant);
      mockParticipantRepository.save.mockResolvedValue(mockParticipant);
      mockAppointmentRepository.findOne.mockResolvedValue({
        ...mockAppointment,
        group: mockGroup,
        game: mockGame,
        creator: mockUser,
        participants: [mockParticipant],
      });

      const result = await service.create("user-1", {
        groupId: "group-1",
        gameId: "game-1",
        title: "周末开黑",
        startTime: new Date("2024-01-20T19:00:00Z"),
        maxParticipants: 5,
      });

      expect(result).toHaveProperty("id");
      expect(result.title).toBe("周末开黑");
      expect(mockAppointmentRepository.save).toHaveBeenCalled();
      expect(mockParticipantRepository.save).toHaveBeenCalled();
    });

    it("应该在小组不存在时抛出异常", async () => {
      mockGroupRepository.findOne.mockResolvedValue(null);

      await expect(
        service.create("user-1", {
          groupId: "group-1",
          gameId: "game-1",
          title: "周末开黑",
          startTime: new Date("2024-01-20T19:00:00Z"),
          maxParticipants: 5,
        }),
      ).rejects.toThrow(NotFoundException);
    });

    it("应该在用户不在小组中时抛出异常", async () => {
      mockGroupRepository.findOne.mockResolvedValue(mockGroup);
      mockGroupMemberRepository.findOne.mockResolvedValue(null);

      await expect(
        service.create("user-1", {
          groupId: "group-1",
          gameId: "game-1",
          title: "周末开黑",
          startTime: new Date("2024-01-20T19:00:00Z"),
          maxParticipants: 5,
        }),
      ).rejects.toThrow(ForbiddenException);
    });

    it("应该在游戏不存在时抛出异常", async () => {
      mockGroupRepository.findOne.mockResolvedValue(mockGroup);
      mockGroupMemberRepository.findOne.mockResolvedValue(mockMembership);
      mockGameRepository.findOne.mockResolvedValue(null);

      await expect(
        service.create("user-1", {
          groupId: "group-1",
          gameId: "game-1",
          title: "周末开黑",
          startTime: new Date("2024-01-20T19:00:00Z"),
          maxParticipants: 5,
        }),
      ).rejects.toThrow(NotFoundException);
    });
  });

  describe("findAll", () => {
    it("应该成功获取预约列表", async () => {
      const mockQueryBuilder = {
        leftJoinAndSelect: jest.fn().mockReturnThis(),
        where: jest.fn().mockReturnThis(),
        andWhere: jest.fn().mockReturnThis(),
        orderBy: jest.fn().mockReturnThis(),
        skip: jest.fn().mockReturnThis(),
        take: jest.fn().mockReturnThis(),
        getManyAndCount: jest.fn().mockResolvedValue([[mockAppointment], 1]),
      };

      mockAppointmentRepository.createQueryBuilder.mockReturnValue(
        mockQueryBuilder,
      );
      mockGroupMemberRepository.findOne.mockResolvedValue(mockMembership);

      const result = await service.findAll("user-1", {
        groupId: "group-1",
        page: 1,
        limit: 10,
      });

      expect(result).toHaveProperty("items");
      expect(result).toHaveProperty("total");
      expect(result.items).toHaveLength(1);
    });
  });

  describe("findOne", () => {
    it("应该成功获取预约详情", async () => {
      mockAppointmentRepository.findOne.mockResolvedValue({
        ...mockAppointment,
        group: mockGroup,
        game: mockGame,
        creator: mockUser,
      });

      const result = await service.findOne("appointment-1");

      expect(result).toHaveProperty("id");
      expect(result.id).toBe("appointment-1");
    });

    it("应该在预约不存在时抛出异常", async () => {
      mockAppointmentRepository.findOne.mockResolvedValue(null);

      await expect(service.findOne("appointment-1")).rejects.toThrow(
        NotFoundException,
      );
    });
  });

  describe("update", () => {
    it("应该成功更新预约", async () => {
      mockAppointmentRepository.findOne
        .mockResolvedValueOnce(mockAppointment)
        .mockResolvedValueOnce({
          ...mockAppointment,
          title: "更新后的标题",
          group: mockGroup,
          game: mockGame,
          creator: mockUser,
        });
      mockAppointmentRepository.save.mockResolvedValue({
        ...mockAppointment,
        title: "更新后的标题",
      });

      const result = await service.update("user-1", "appointment-1", {
        title: "更新后的标题",
      });

      expect(result.title).toBe("更新后的标题");
    });

    it("应该在非创建者更新时抛出异常", async () => {
      mockAppointmentRepository.findOne.mockResolvedValue(mockAppointment);

      await expect(
        service.update("user-2", "appointment-1", { title: "新标题" }),
      ).rejects.toThrow(ForbiddenException);
    });
  });

  describe("cancel", () => {
    it("应该成功取消预约", async () => {
      mockAppointmentRepository.findOne.mockResolvedValue(mockAppointment);
      mockAppointmentRepository.save.mockResolvedValue({
        ...mockAppointment,
        status: AppointmentStatus.CANCELLED,
      });

      const result = await service.cancel("user-1", "appointment-1");

      expect(result).toHaveProperty("message");
    });

    it("应该在非创建者取消时抛出异常", async () => {
      mockAppointmentRepository.findOne.mockResolvedValue(mockAppointment);

      await expect(service.cancel("user-2", "appointment-1")).rejects.toThrow(
        ForbiddenException,
      );
    });
  });

  describe("join", () => {
    it("应该成功加入预约", async () => {
      mockAppointmentRepository.findOne.mockResolvedValue(mockAppointment);
      mockGroupMemberRepository.findOne.mockResolvedValue(mockMembership);
      mockParticipantRepository.findOne.mockResolvedValue(null);
      mockParticipantRepository.count.mockResolvedValue(3);
      mockParticipantRepository.create.mockReturnValue(mockParticipant);
      mockParticipantRepository.save.mockResolvedValue(mockParticipant);

      const result = await service.join("user-2", "appointment-1");

      expect(result).toHaveProperty("message");
      expect(mockParticipantRepository.save).toHaveBeenCalled();
    });

    it("应该在预约已满时抛出异常", async () => {
      mockAppointmentRepository.findOne.mockResolvedValue(mockAppointment);
      mockGroupMemberRepository.findOne.mockResolvedValue(mockMembership);
      mockParticipantRepository.findOne.mockResolvedValue(null);
      mockParticipantRepository.count.mockResolvedValue(5);

      await expect(service.join("user-2", "appointment-1")).rejects.toThrow(
        BadRequestException,
      );
    });

    it("应该在已加入时抛出异常", async () => {
      mockAppointmentRepository.findOne.mockResolvedValue(mockAppointment);
      mockGroupMemberRepository.findOne.mockResolvedValue(mockMembership);
      mockParticipantRepository.findOne.mockResolvedValue(mockParticipant);

      await expect(service.join("user-1", "appointment-1")).rejects.toThrow(
        BadRequestException,
      );
    });
  });

  describe("leave", () => {
    it("应该成功离开预约", async () => {
      mockAppointmentRepository.findOne.mockResolvedValue(mockAppointment);
      mockParticipantRepository.findOne.mockResolvedValue(mockParticipant);
      mockParticipantRepository.remove.mockResolvedValue(mockParticipant);

      const result = await service.leave("user-1", "appointment-1");

      expect(result).toHaveProperty("message");
      expect(mockParticipantRepository.remove).toHaveBeenCalled();
    });

    it("应该在创建者尝试离开时抛出异常", async () => {
      mockAppointmentRepository.findOne.mockResolvedValue(mockAppointment);

      await expect(service.leave("user-1", "appointment-1")).rejects.toThrow(
        BadRequestException,
      );
    });

    it("应该在未加入时抛出异常", async () => {
      mockAppointmentRepository.findOne.mockResolvedValue(mockAppointment);
      mockParticipantRepository.findOne.mockResolvedValue(null);

      await expect(service.leave("user-2", "appointment-1")).rejects.toThrow(
        BadRequestException,
      );
    });
  });
});