/**
 * Support Tickets Service Unit Tests
 *
 * Tests for support ticket service functionality.
 * These tests ensure that:
 * 1. Staff users are queried from the `users` table (NOT a separate `staff_users` table)
 * 2. The service correctly handles ticket messages
 *
 * REGRESSION TESTS:
 * - Bug #1: Code was using prisma.staff_users which doesn't exist
 * - Fix: All sender lookups now use prisma.users table
 */

import * as fs from "fs";
import * as path from "path";

describe("Support Tickets Service - Static Analysis", () => {
  describe("No staff_users table references", () => {
    it("should NOT have any prisma.staff_users references in service code", () => {
      // Read the actual source file
      const servicePath = path.resolve(
        process.cwd(),
        "lib/services/support-tickets.service.ts",
      );

      const serviceContent = fs.readFileSync(servicePath, "utf-8");

      // Check for actual code using prisma.staff_users (not comments mentioning it)
      // The pattern we're looking for is the actual prisma query, not documentation
      const hasPrismaStaffUsersReference =
        serviceContent.includes("prisma.staff_users");

      expect(hasPrismaStaffUsersReference).toBe(false);
    });

    it("should use prisma.users for sender lookups", () => {
      const servicePath = path.resolve(
        process.cwd(),
        "lib/services/support-tickets.service.ts",
      );

      const serviceContent = fs.readFileSync(servicePath, "utf-8");

      // Should have prisma.users references
      const hasPrismaUsersReference = serviceContent.includes("prisma.users");

      expect(hasPrismaUsersReference).toBe(true);
    });

    it("should NOT have conditional prisma.staff_users vs prisma.users lookup", () => {
      const servicePath = path.resolve(
        process.cwd(),
        "lib/services/support-tickets.service.ts",
      );

      const serviceContent = fs.readFileSync(servicePath, "utf-8");

      // The bug was conditional lookup like:
      // if (senderType === 'STAFF') { prisma.staff_users... } else { prisma.users... }
      // This pattern should not exist

      // Check for patterns that indicate conditional staff lookup using actual prisma queries
      const hasConditionalStaffLookup =
        serviceContent.includes("senderType === 'STAFF'") &&
        serviceContent.includes("prisma.staff_users");

      expect(hasConditionalStaffLookup).toBe(false);
    });
  });
});

describe("Support Tickets Service - Required Functions", () => {
  describe("Service exports", () => {
    it("should export getTicketWithMessages function", () => {
      const servicePath = path.resolve(
        process.cwd(),
        "lib/services/support-tickets.service.ts",
      );

      const serviceContent = fs.readFileSync(servicePath, "utf-8");

      expect(serviceContent).toMatch(
        /export\s+(async\s+)?function\s+getTicketWithMessages/,
      );
    });

    it("should export addTicketMessage function", () => {
      const servicePath = path.resolve(
        process.cwd(),
        "lib/services/support-tickets.service.ts",
      );

      const serviceContent = fs.readFileSync(servicePath, "utf-8");

      expect(serviceContent).toMatch(
        /export\s+(async\s+)?function\s+addTicketMessage/,
      );
    });

    it("should export createTicket function", () => {
      const servicePath = path.resolve(
        process.cwd(),
        "lib/services/support-tickets.service.ts",
      );

      const serviceContent = fs.readFileSync(servicePath, "utf-8");

      expect(serviceContent).toMatch(
        /export\s+(async\s+)?function\s+createTicket/,
      );
    });

    it("should export getUserTickets function", () => {
      const servicePath = path.resolve(
        process.cwd(),
        "lib/services/support-tickets.service.ts",
      );

      const serviceContent = fs.readFileSync(servicePath, "utf-8");

      expect(serviceContent).toMatch(
        /export\s+(async\s+)?function\s+getUserTickets/,
      );
    });

    it("should export updateTicketStatus function", () => {
      const servicePath = path.resolve(
        process.cwd(),
        "lib/services/support-tickets.service.ts",
      );

      const serviceContent = fs.readFileSync(servicePath, "utf-8");

      expect(serviceContent).toMatch(
        /export\s+(async\s+)?function\s+updateTicketStatus/,
      );
    });
  });
});

describe("Support Tickets - Staff Authentication Pattern", () => {
  it("should document the correct pattern for staff user lookup", () => {
    /**
     * CORRECT PATTERN:
     * Staff users are regular users with elevated roles (ADMIN, SUPER_ADMIN, STAFF)
     * They are stored in the `users` table, NOT a separate `staff_users` table.
     *
     * To check if a user is staff:
     * const isStaff = user.role !== 'CUSTOMER';
     *
     * OR
     *
     * const isStaff = ['ADMIN', 'SUPER_ADMIN', 'STAFF'].includes(user.role);
     *
     * WRONG PATTERN (DO NOT USE):
     * prisma.staff_users.findUnique() // This table doesn't exist!
     */

    expect(true).toBe(true); // Documentation test
  });
});

describe("Support Tickets - Database Model Assumptions", () => {
  it("should have correct table relationships documented", () => {
    /**
     * TABLE RELATIONSHIPS:
     *
     * support_tickets:
     *   - id (primary key)
     *   - userId (foreign key to users.id)
     *   - subject
     *   - status (OPEN, IN_PROGRESS, RESOLVED, CLOSED)
     *   - priority (LOW, MEDIUM, HIGH, URGENT)
     *   - createdAt, updatedAt
     *
     * ticket_messages:
     *   - id (primary key)
     *   - ticketId (foreign key to support_tickets.id)
     *   - senderId (ID of sender - could be customer OR staff, both in users table)
     *   - senderType ('USER' or 'STAFF')
     *   - message
     *   - createdAt
     *
     * users:
     *   - id (primary key)
     *   - email, name, role
     *   - role can be: CUSTOMER, STAFF, ADMIN, SUPER_ADMIN
     *   - ALL users (customers AND staff) are in this single table
     *
     * THERE IS NO staff_users TABLE!
     */

    expect(true).toBe(true); // Documentation test
  });
});

describe("Staff Session - Required Functions", () => {
  describe("Session exports", () => {
    it("should export validateStaffSession function", () => {
      const sessionPath = path.resolve(process.cwd(), "lib/staff-session.ts");

      const sessionContent = fs.readFileSync(sessionPath, "utf-8");

      // Check that validateStaffSession is exported
      expect(sessionContent).toMatch(
        /export\s+(async\s+)?function\s+validateStaffSession/,
      );
    });

    it("should export getStaffSession function", () => {
      const sessionPath = path.resolve(process.cwd(), "lib/staff-session.ts");

      const sessionContent = fs.readFileSync(sessionPath, "utf-8");

      expect(sessionContent).toMatch(
        /export\s+(async\s+)?function\s+getStaffSession/,
      );
    });

    it("should export clearStaffSession function", () => {
      const sessionPath = path.resolve(process.cwd(), "lib/staff-session.ts");

      const sessionContent = fs.readFileSync(sessionPath, "utf-8");

      expect(sessionContent).toMatch(
        /export\s+(async\s+)?function\s+clearStaffSession/,
      );
    });
  });

  describe("Session implementation", () => {
    it("should query users table NOT staff_users", () => {
      const sessionPath = path.resolve(process.cwd(), "lib/staff-session.ts");

      const sessionContent = fs.readFileSync(sessionPath, "utf-8");

      // Should have prisma.users reference
      expect(sessionContent).toContain("prisma.users");

      // Should NOT have prisma.staff_users reference (actual code, not comments)
      expect(sessionContent).not.toContain("prisma.staff_users");
    });

    it("should only allow ADMIN/SUPER_ADMIN roles as staff", () => {
      const sessionPath = path.resolve(process.cwd(), "lib/staff-session.ts");

      const sessionContent = fs.readFileSync(sessionPath, "utf-8");

      // Should check for ADMIN role
      expect(sessionContent).toContain("ADMIN");
    });
  });
});
