import { expect, test, describe, mock, beforeEach } from "bun:test";

// Since agent-wrapper.ts has complex external dependencies, we'll test the structure
// and methods that can be tested without actual API calls

describe("HierarchyAgent", () => {
  describe("module structure", () => {
    test("should export HierarchyAgent class", async () => {
      const module = await import("../agent-wrapper");
      expect(typeof module.default).toBe("function"); // Constructor function
    });

    test("should export AgentConfig interface", async () => {
      // Test that we can import the module without errors
      const module = await import("../agent-wrapper");
      expect(module).toBeDefined();
    });

    test("should export HierarchyGenerationOptions interface", async () => {
      // Test that we can import the module without errors
      const module = await import("../agent-wrapper");
      expect(module).toBeDefined();
    });
  });

  describe("class instantiation", () => {
    test("should create HierarchyAgent instance with config", async () => {
      // Mock the Agent class to avoid actual OpenAI dependencies
      const mockAgent = {
        name: "test-agent",
        instructions: "test instructions"
      };

      const mockAgentConstructor = mock(() => mockAgent);
      
      // Mock the @openai/agents module
      mock.module('@openai/agents', () => ({
        Agent: mockAgentConstructor
      }));

      const { default: HierarchyAgent } = await import("../agent-wrapper");
      
      const config = {
        apiKey: "test-key",
        model: "gpt-4o-mini",
        instructions: "Test instructions"
      };

      expect(() => {
        new HierarchyAgent(config);
      }).not.toThrow();
    });
  });

  describe("method signatures", () => {
    test("should have required methods", async () => {
      // Mock dependencies
      const mockAgent = {
        name: "test-agent",
        instructions: "test instructions"
      };

      mock.module('@openai/agents', () => ({
        Agent: mock(() => mockAgent)
      }));

      const { default: HierarchyAgent } = await import("../agent-wrapper");
      
      const config = {
        apiKey: "test-key",
        model: "gpt-4o-mini",
        instructions: "Test instructions"
      };

      const agent = new HierarchyAgent(config);

      // Test that methods exist
      expect(typeof agent.generateHierarchy).toBe("function");
      expect(typeof agent.generateHierarchyWithStreaming).toBe("function");
      expect(typeof agent.generateExample).toBe("function");
      expect(typeof agent.getAvailableTemplates).toBe("function");
      expect(typeof agent.getTemplatesByDomain).toBe("function");
      expect(typeof agent.getTemplatesByVersion).toBe("function");
      expect(typeof agent.addCustomTemplate).toBe("function");
      expect(typeof agent.validateHierarchy).toBe("function");
      expect(typeof agent.optimizeHierarchy).toBe("function");
      expect(typeof agent.generateMultipleExamples).toBe("function");
    });
  });

  describe("template management", () => {
    test("should manage templates through TemplateManager", async () => {
      // Mock dependencies
      const mockAgent = {
        name: "test-agent",
        instructions: "test instructions"
      };

      mock.module('@openai/agents', () => ({
        Agent: mock(() => mockAgent)
      }));

      const { default: HierarchyAgent } = await import("../agent-wrapper");
      
      const config = {
        apiKey: "test-key",
        model: "gpt-4o-mini",
        instructions: "Test instructions"
      };

      const agent = new HierarchyAgent(config);

      // Test template methods don't throw
      expect(() => {
        agent.getAvailableTemplates();
      }).not.toThrow();

      expect(() => {
        agent.getTemplatesByDomain("technology");
      }).not.toThrow();

      expect(() => {
        agent.getTemplatesByVersion("v1");
      }).not.toThrow();
    });

    test("should add custom templates", async () => {
      // Mock dependencies
      const mockAgent = {
        name: "test-agent",
        instructions: "test instructions"
      };

      mock.module('@openai/agents', () => ({
        Agent: mock(() => mockAgent)
      }));

      const { default: HierarchyAgent } = await import("../agent-wrapper");
      
      const config = {
        apiKey: "test-key",
        model: "gpt-4o-mini",
        instructions: "Test instructions"
      };

      const agent = new HierarchyAgent(config);

      const customTemplate = {
        version: 'v1' as const,
        domain: 'Custom',
        structure: ['Domain', 'Specialization', 'Role', 'Responsibility'],
        description: 'Custom template',
        commonSkills: ['Skill1'],
        commonTools: ['Tool1'],
        examples: ['Example1']
      };

      expect(() => {
        agent.addCustomTemplate('custom-key', customTemplate);
      }).not.toThrow();
    });
  });

  describe("validation methods", () => {
    test("should validate hierarchy data", async () => {
      // Mock dependencies
      const mockAgent = {
        name: "test-agent",
        instructions: "test instructions"
      };

      mock.module('@openai/agents', () => ({
        Agent: mock(() => mockAgent)
      }));

      const { default: HierarchyAgent } = await import("../agent-wrapper");
      
      const config = {
        apiKey: "test-key",
        model: "gpt-4o-mini",
        instructions: "Test instructions"
      };

      const agent = new HierarchyAgent(config);

      const validHierarchy = {
        version: "v1",
        domain: "Technology",
        structure: ["Domain", "Specialization", "Role", "Responsibility"],
        description: "Test hierarchy"
      };

      expect(() => {
        agent.validateHierarchy(validHierarchy);
      }).not.toThrow();
    });

    test("should optimize hierarchy data", async () => {
      // Mock dependencies
      const mockAgent = {
        name: "test-agent",
        instructions: "test instructions"
      };

      mock.module('@openai/agents', () => ({
        Agent: mock(() => mockAgent)
      }));

      const { default: HierarchyAgent } = await import("../agent-wrapper");
      
      const config = {
        apiKey: "test-key",
        model: "gpt-4o-mini",
        instructions: "Test instructions"
      };

      const agent = new HierarchyAgent(config);

      const hierarchyData = {
        version: "v1",
        domain: "Technology",
        structure: ["Domain", "Specialization", "Role", "Responsibility"],
        description: "Test hierarchy"
      };

      expect(() => {
        agent.optimizeHierarchy(hierarchyData);
      }).not.toThrow();
    });
  });

  describe("configuration handling", () => {
    test("should handle different model configurations", async () => {
      // Mock dependencies
      const mockAgent = {
        name: "test-agent",
        instructions: "test instructions"
      };

      mock.module('@openai/agents', () => ({
        Agent: mock(() => mockAgent)
      }));

      const { default: HierarchyAgent } = await import("../agent-wrapper");
      
      const configs = [
        {
          apiKey: "test-key",
          model: "gpt-4o-mini",
          instructions: "Test instructions"
        },
        {
          apiKey: "test-key",
          model: "gpt-4",
          instructions: "Different instructions"
        }
      ];

      configs.forEach(config => {
        expect(() => {
          new HierarchyAgent(config);
        }).not.toThrow();
      });
    });

    test("should handle optional configuration parameters", async () => {
      // Mock dependencies
      const mockAgent = {
        name: "test-agent",
        instructions: "test instructions"
      };

      mock.module('@openai/agents', () => ({
        Agent: mock(() => mockAgent)
      }));

      const { default: HierarchyAgent } = await import("../agent-wrapper");
      
      const minimalConfig = {
        apiKey: "test-key"
      };

      expect(() => {
        new HierarchyAgent(minimalConfig);
      }).not.toThrow();
    });
  });

  describe("error handling", () => {
    test("should handle missing API key gracefully", async () => {
      // Mock dependencies
      const mockAgent = {
        name: "test-agent",
        instructions: "test instructions"
      };

      mock.module('@openai/agents', () => ({
        Agent: mock(() => mockAgent)
      }));

      const { default: HierarchyAgent } = await import("../agent-wrapper");
      
      const invalidConfig = {
        model: "gpt-4o-mini",
        instructions: "Test instructions"
        // Missing apiKey
      };

      // The constructor should still work, but API calls would fail
      expect(() => {
        new HierarchyAgent(invalidConfig);
      }).not.toThrow();
    });
  });

  describe("integration points", () => {
    test("should integrate with HierarchyGenerator", async () => {
      // Mock dependencies
      const mockAgent = {
        name: "test-agent",
        instructions: "test instructions"
      };

      mock.module('@openai/agents', () => ({
        Agent: mock(() => mockAgent)
      }));

      const { default: HierarchyAgent } = await import("../agent-wrapper");
      
      const config = {
        apiKey: "test-key",
        model: "gpt-4o-mini",
        instructions: "Test instructions"
      };

      const agent = new HierarchyAgent(config);

      // Test that the agent has the expected structure for integration
      expect(agent).toBeDefined();
      expect(typeof agent.generateExample).toBe("function");
    });

    test("should integrate with TemplateManager", async () => {
      // Mock dependencies
      const mockAgent = {
        name: "test-agent",
        instructions: "test instructions"
      };

      mock.module('@openai/agents', () => ({
        Agent: mock(() => mockAgent)
      }));

      const { default: HierarchyAgent } = await import("../agent-wrapper");
      
      const config = {
        apiKey: "test-key",
        model: "gpt-4o-mini",
        instructions: "Test instructions"
      };

      const agent = new HierarchyAgent(config);

      // Test template management methods
      expect(typeof agent.getAvailableTemplates).toBe("function");
      expect(typeof agent.addCustomTemplate).toBe("function");
    });

    test("should integrate with OutputFormatter", async () => {
      // Mock dependencies
      const mockAgent = {
        name: "test-agent",
        instructions: "test instructions"
      };

      mock.module('@openai/agents', () => ({
        Agent: mock(() => mockAgent)
      }));

      const { default: HierarchyAgent } = await import("../agent-wrapper");
      
      const config = {
        apiKey: "test-key",
        model: "gpt-4o-mini",
        instructions: "Test instructions"
      };

      const agent = new HierarchyAgent(config);

      // Test that methods exist for output formatting integration
      expect(typeof agent.generateMultipleExamples).toBe("function");
    });
  });
});