import { describe, it, expect, beforeEach, vi } from "vitest";
import { NextRequest } from "next/server";
import { hash } from "bcryptjs";

// Mock getServerSession
const mockGetServerSession = vi.fn();
vi.mock("next-auth", () => ({
  getServerSession: () => mockGetServerSession(),
}));

// Mock database
const mockDb = {
  company: {
    findMany: vi.fn(),
    count: vi.fn(),
    create: vi.fn(),
    findUnique: vi.fn(),
    update: vi.fn(),
  },
  user: {
    count: vi.fn(),
    create: vi.fn(),
  },
  session: {
    count: vi.fn(),
  },
};

vi.mock("../../lib/db", () => ({
  db: mockDb,
}));

// Mock bcryptjs
vi.mock("bcryptjs", () => ({
  hash: vi.fn(() => "hashed_password"),
}));

describe("Platform API Endpoints", () => {
  beforeEach(() => {
    vi.clearAllMocks();
  });

  describe("Authentication Requirements", () => {
    it("should require platform authentication", async () => {
      mockGetServerSession.mockResolvedValue(null);

      // Test that endpoints check for authentication
      const endpoints = [
        "/api/platform/companies",
        "/api/platform/companies/123",
      ];

      endpoints.forEach((endpoint) => {
        expect(endpoint).toMatch(/^\/api\/platform\//);
      });
    });

    it("should require platform user flag", () => {
      const regularUserSession = {
        user: {
          email: "regular@user.com",
          isPlatformUser: false,
        },
        expires: new Date().toISOString(),
      };

      const platformUserSession = {
        user: {
          email: "admin@notso.ai",
          isPlatformUser: true,
          platformRole: "SUPER_ADMIN",
        },
        expires: new Date().toISOString(),
      };

      expect(regularUserSession.user.isPlatformUser).toBe(false);
      expect(platformUserSession.user.isPlatformUser).toBe(true);
    });
  });

  describe("Company Management", () => {
    it("should return companies list structure", async () => {
      const mockCompanies = [
        {
          id: "1",
          name: "Company A",
          status: "ACTIVE",
          createdAt: new Date(),
          _count: { users: 5 },
        },
        {
          id: "2",
          name: "Company B",
          status: "SUSPENDED",
          createdAt: new Date(),
          _count: { users: 3 },
        },
      ];

      mockDb.company.findMany.mockResolvedValue(mockCompanies);
      mockDb.company.count.mockResolvedValue(2);
      mockDb.user.count.mockResolvedValue(8);
      mockDb.session.count.mockResolvedValue(150);

      const result = await mockDb.company.findMany({
        include: {
          _count: {
            select: { users: true },
          },
        },
        orderBy: { createdAt: "desc" },
      });

      expect(result).toHaveLength(2);
      expect(result[0]).toHaveProperty("name");
      expect(result[0]).toHaveProperty("status");
      expect(result[0]._count).toHaveProperty("users");
    });

    it("should create company with admin user", async () => {
      const newCompany = {
        id: "123",
        name: "New Company",
        email: "admin@newcompany.com",
        status: "ACTIVE",
        maxUsers: 10,
        createdAt: new Date(),
        updatedAt: new Date(),
      };

      const newUser = {
        id: "456",
        email: "admin@newcompany.com",
        name: "Admin User",
        hashedPassword: "hashed_password",
        role: "ADMIN",
        companyId: "123",
        createdAt: new Date(),
        updatedAt: new Date(),
        invitedBy: null,
        invitedAt: null,
      };

      mockDb.company.create.mockResolvedValue({
        ...newCompany,
        users: [newUser],
      });

      const result = await mockDb.company.create({
        data: {
          name: "New Company",
          email: "admin@newcompany.com",
          users: {
            create: {
              email: "admin@newcompany.com",
              name: "Admin User",
              hashedPassword: "hashed_password",
              role: "ADMIN",
            },
          },
        },
        include: { users: true },
      });

      expect(result.name).toBe("New Company");
      expect(result.users).toHaveLength(1);
      expect(result.users[0].email).toBe("admin@newcompany.com");
      expect(result.users[0].role).toBe("ADMIN");
    });

    it("should update company status", async () => {
      const updatedCompany = {
        id: "123",
        name: "Test Company",
        status: "SUSPENDED",
        createdAt: new Date(),
        updatedAt: new Date(),
      };

      mockDb.company.update.mockResolvedValue(updatedCompany);

      const result = await mockDb.company.update({
        where: { id: "123" },
        data: { status: "SUSPENDED" },
      });

      expect(result.status).toBe("SUSPENDED");
    });
  });

  describe("Role-Based Access Control", () => {
    it("should enforce role permissions", () => {
      const permissions = {
        SUPER_ADMIN: {
          canCreateCompany: true,
          canUpdateCompany: true,
          canDeleteCompany: true,
          canViewAllData: true,
        },
        ADMIN: {
          canCreateCompany: false,
          canUpdateCompany: false,
          canDeleteCompany: false,
          canViewAllData: true,
        },
        SUPPORT: {
          canCreateCompany: false,
          canUpdateCompany: false,
          canDeleteCompany: false,
          canViewAllData: true,
        },
      };

      Object.entries(permissions).forEach(([role, perms]) => {
        if (role === "SUPER_ADMIN") {
          expect(perms.canCreateCompany).toBe(true);
          expect(perms.canUpdateCompany).toBe(true);
        } else {
          expect(perms.canCreateCompany).toBe(false);
          expect(perms.canUpdateCompany).toBe(false);
        }
      });
    });
  });

  describe("Error Handling", () => {
    it("should handle missing required fields", () => {
      const invalidPayloads = [
        { name: "Company" }, // Missing admin fields
        { adminEmail: "admin@test.com" }, // Missing company name
        { name: "", adminEmail: "admin@test.com" }, // Empty name
      ];

      invalidPayloads.forEach((payload) => {
        const isValid = payload.name && payload.adminEmail;
        expect(isValid).toBeFalsy();
      });
    });

    it("should handle database errors", async () => {
      mockDb.company.findUnique.mockRejectedValue(new Error("Database error"));

      try {
        await mockDb.company.findUnique({ where: { id: "123" } });
      } catch (error) {
        expect(error).toBeInstanceOf(Error);
        expect((error as Error).message).toBe("Database error");
      }
    });
  });
});