/**
 * AI Test Case Generation API Service
 * 
 * Integrates with the AI backend microservice to generate test cases
 * for features (issues) based on their tasks.
 * 
 * Response format matches the frontend Task interface for direct
 * use with tasksApi.create()
 */

import { Task } from './tasksApi';

// AI Backend Configuration
const AI_BACKEND_URL = 'https://devarshia5-aipmtool.hf.space';

// ============================================================================
//  TYPES
// ============================================================================

export interface TaskInfo {
  id: number;
  taskCode?: string;
  title: string;
  description?: string;
  status?: string;
  assignedTo?: number | null;
}

export interface FrontendGenerateRequest {
  feature_id: number;
  feature_title?: string;
  feature_description?: string;
  project_id?: number;
  project_name?: string;
  deliverable_id?: number;
  deliverable_name?: string;
  tasks: TaskInfo[];
  test_case_count?: number;
  environment?: 'Development' | 'Testing' | 'Staging' | 'Production';
  // Existing test cases to avoid duplicates
  existing_test_cases?: ExistingTestCase[];
  // Additional context from user (text or PDF content)
  additional_context?: string;
}

export interface ExistingTestCase {
  title: string;
  description?: string;
}

export interface FrontendTestCase {
  type: 'Test Case';
  id?: number;
  title: string;
  description: string;
  issuesId: number;
  projectId?: number;
  status: string;
  priority: string;
  severity: string;
  environment: string;
  stepsToReproduce: string;
  inputs: string;
  expectedBehavior: string;
  actualBehavior: string;
  rootCause: string;
  resolution: string;
  version: string;
  url: string;
  assignedTo: number | null;
  stateDate: string;
  endDate: string | null;
  related_task_id?: number;
  related_task_code?: string;
  projectName?: string;
  issueName?: string;
  deliverableName?: string;
}

export interface FrontendGenerateResponse {
  success: boolean;
  message: string;
  feature_id: number;
  feature_name?: string;
  generated_at: string;
  test_cases: FrontendTestCase[];
  metadata?: {
    total_tasks_processed: number;
    total_tasks_failed: number;
    test_cases_per_task: number;
    environment: string;
    failed_tasks?: Array<{
      task_id: number;
      task_title: string;
      error: string;
    }>;
  };
}

// ============================================================================
//  AI TEST CASE API CLASS
// ============================================================================

class AITestCaseApi {
  
  /**
   * Generate test cases for a feature (issue)
   * 
   * @param request - Feature context and tasks
   * @returns Generated test cases in Task format
   */
  async generateForFeature(request: FrontendGenerateRequest): Promise<FrontendGenerateResponse> {
    try {
      const response = await fetch(`${AI_BACKEND_URL}/api/testcases/generate/frontend`, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
        },
        body: JSON.stringify({
          ...request,
          test_case_count: request.test_case_count || 3,
          environment: request.environment || 'Staging',
        }),
      });

      if (!response.ok) {
        const errorData = await response.json().catch(() => ({}));
        throw new Error(errorData.detail || `HTTP ${response.status}: ${response.statusText}`);
      }

      const data: FrontendGenerateResponse = await response.json();
      return data;

    } catch (error) {
      console.error('AI Test Case Generation Error:', error);
      throw error;
    }
  }

  /**
   * Check if AI backend is healthy
   */
  async checkHealth(): Promise<{
    status: string;
    groq_status: string;
    pm_tool_status: string;
  }> {
    try {
      const response = await fetch(`${AI_BACKEND_URL}/health`, {
        method: 'GET',
      });

      if (!response.ok) {
        return {
          status: 'unhealthy',
          groq_status: 'unknown',
          pm_tool_status: 'unknown',
        };
      }

      const data = await response.json();
      return {
        status: data.status,
        groq_status: data.groq_status,
        pm_tool_status: data.pm_tool_status,
      };

    } catch (error) {
      return {
        status: 'unreachable',
        groq_status: 'unknown',
        pm_tool_status: 'unknown',
      };
    }
  }

  /**
   * Convert FrontendTestCase to Task format for tasksApi.create()
   */
  toTaskFormat(testCase: FrontendTestCase): Partial<Task> {
    return {
      type: 'Test Case',
      title: testCase.title,
      description: testCase.description,
      issuesId: testCase.issuesId,
      projectId: testCase.projectId,
      status: testCase.status,
      priority: testCase.priority,
      severity: testCase.severity,
      environment: testCase.environment,
      stepsToReproduce: testCase.stepsToReproduce,
      inputs: testCase.inputs,
      expectedBehavior: testCase.expectedBehavior,
      actualBehavior: testCase.actualBehavior || '',
      rootCause: testCase.rootCause || '',
      resolution: testCase.resolution || '',
      version: testCase.version || '',
      url: testCase.url || '',
      assignedTo: testCase.assignedTo,
      stateDate: testCase.stateDate,
      endDate: testCase.endDate,
    };
  }
}

// Export singleton instance
export const aiTestCaseApi = new AITestCaseApi();
export default aiTestCaseApi;