// Import existing types
import type {
  Role,
  RoleCreateRequest,
  RoleUpdateRequest,
  Employee,
  EmployeeRegistrationRequest,
  ProjectApi,
  ProjectCreateRequest,
  ProjectUpdateRequest as ProjectUpdateRequestType,
  Deliverable,
  DeliverableCreateRequest,
  DeliverableUpdateRequest,
  IssueApi,
  IssueCreateRequest,
  IssueUpdateRequest,
  Team,
  TeamCreateRequest,
  TeamUpdateRequest,
  TeamMember,
  TeamMemberCreateRequest,
  TeamMemberUpdateRequest,
  // New types for meeting room booking
  MeetingRoom,
  MeetingRoomCreateRequest,
  MeetingRoomUpdateRequest,
  RoomBooking,
  RoomBookingCreateRequest,
  RoomBookingUpdateRequest,
  MaintenanceAmcDate,
  MaintenanceAmcDateCreateRequest,
  MaintenanceAmcDateUpdateRequest,
  ReleaseDate,
  ReleaseDateCreateRequest,
  ReleaseDateUpdateRequest
} from '@/types';

import { mapApiProject, mapApiIssue } from '@/types';
import { API_BASE_URL as CONFIG_API_URL } from '@/config';
import { Project, Employee as GenericEmployee, ResponseData, Deliverable as DeliverableType, IssueApi as IssueApiType, ProjectTeamApi } from '@/types';
import { Employee as EmployeeType } from '@/services/employeeApi';
import axios, { AxiosError } from 'axios';
import apiClient from '@/lib/api/axios-instance';

// Define the base API URL
const PRIMARY_API_URL = `${CONFIG_API_URL}/api`;

// Current active API URL - will be updated if needed
let API_BASE_URL = PRIMARY_API_URL;

// Utility function to check if API is available and update base URL if needed
export const checkApiConnection = async (): Promise<boolean> => {
  // Only check the primary URL, no alternates
  try {
    console.log(`Checking API connection at ${PRIMARY_API_URL}...`);
    const response = await apiClient.get(`${PRIMARY_API_URL}/health`, {
      headers: {
        'Content-Type': 'application/json',
      },
    });

    if (response.status === 200) {
      console.log('API connection successful!');
      API_BASE_URL = PRIMARY_API_URL;
      return true;
    }
  } catch (error) {
    console.error('API connection failed:', error);
  }

  console.error('API connection attempt failed');
  return false;
};

// Interface for login request payload
export interface LoginRequest {
  email: string;
  password: string;
}

// Interface for login response
export interface LoginResponse {
  userId: number;
  email: string;
  firstName: string;
  lastName: string;
  roleId: number;
  roleName: string | null;
  token: string;
  employeeId: number;
}

/**
 * Store user session in localStorage
 */
export const userSessionService = {
  setSession: (userData: LoginResponse) => {
    localStorage.setItem('user_session', JSON.stringify(userData));
  },

  getSession: (): LoginResponse | null => {
    const session = localStorage.getItem('user_session');
    return session ? JSON.parse(session) : null;
  },

  clearSession: () => {
    localStorage.removeItem('user_session');
  },

  isAuthenticated: (): boolean => {
    return !!localStorage.getItem('user_session');
  }
};

// Create headers with auth info if needed
export const createHeaders = (includeAuth: boolean = true): Record<string, string> => {
  const headers: Record<string, string> = {
    'Content-Type': 'application/json',
    'Accept': '*/*',
  };

  // Add authorization header if needed
  if (includeAuth) {
    const userSession = localStorage.getItem('user_session');
    console.log(`CreateHeaders - includeAuth: ${includeAuth}, session exists: ${!!userSession}`);

    if (userSession) {
      try {
        const userData = JSON.parse(userSession);
        console.log(`User from session: ${userData?.firstName || 'unknown'}, token exists: ${!!userData?.token}`);

        if (userData && userData.token) {
          headers.Authorization = `Bearer ${userData.token}`;
          console.log(`Authorization header set: Bearer ${userData.token.substring(0, 15)}...`);
        } else {
          console.warn('No token found in user session data');
        }
      } catch (error) {
        console.error('Error parsing user session:', error);
      }
    } else {
      console.warn('createHeaders: No user_session found in localStorage');
    }
  }

  return headers;
};

// Base API request function with error handling
async function apiRequest<T>(
  endpoint: string,
  method: string = 'GET',
  data?: any,
  requireAuth: boolean = true
): Promise<T> {
  const url = `${API_BASE_URL}${endpoint}`;

  const config: any = {
    method,
    url,
    headers: createHeaders(requireAuth),
    withCredentials: true
  };

  // For GET requests, convert data to query params if provided
  if (method === 'GET' && data && Object.keys(data).length > 0) {
    // If the URL already has query params, use them and add more
    const hasParams = url.includes('?');
    const separator = hasParams ? '&' : '?';

    const queryParams = new URLSearchParams();
    Object.entries(data).forEach(([key, value]) => {
      if (value !== undefined && value !== null) {
        queryParams.append(key, String(value));
      }
    });

    const queryString = queryParams.toString();
    if (queryString) {
      config.url = `${url}${separator}${queryString}`;
    }
  } else if (method !== 'GET' && data) {
    // For non-GET requests, add data to the request body
    config.data = data;
  }

  try {
    console.log(`Making API request to: ${config.url}`);
    const response = await apiClient(config);
    console.log(`Response status: ${response.status}`);

    console.log(`API data received: ${response.data ? 'yes' : 'no'}`);
    return response.data;
  } catch (error) {
    if (axios.isAxiosError(error)) {
      // Try to parse error response as JSON
      let errorMessage: string;
      const errorData = error.response?.data;
      errorMessage = errorData?.message || errorData?.error ||
        `API Error: ${error.response?.status} ${error.message}`;

      console.error(`API error: ${errorMessage}`);
      throw new Error(errorMessage);
    }

    console.error('API request error:', error);
    throw error;
  }
}

/**
 * API service for authentication
 */
export const authService = {
  /**
   * Login user with email and password
   * @param credentials - User credentials
   * @returns LoginResponse
   */
  login: async (credentials: LoginRequest): Promise<LoginResponse> => {
    try {
      const response = await apiRequest<LoginResponse>(
        '/auth/login',
        'POST',
        credentials,
        false
      );

      if (response && response.userId) {
        console.log('Login successful:', {
          userId: response.userId,
          name: `${response.firstName} ${response.lastName}`,
          role: response.roleName
        });

        // Store user session instead of token
        userSessionService.setSession(response);
        return response;
      }
      throw new Error('Invalid login response');
    } catch (error) {
      console.error('Login failed:', error);
      throw error;
    }
  },

  logout: () => {
    userSessionService.clearSession();
  },

  /**
   * Reset user password
   * @param userId - User ID
   * @param password - New password
   * @param token - Reset token for verification
   * @param email - User email (alternative to userId)
   * @returns Response message
   */
  resetPassword: async (userId?: number, password?: string, token?: string, email?: string): Promise<{ message: string }> => {
    try {
      console.log('Resetting password:', userId ? `for user ID: ${userId}` : `for email: ${email}`);
      console.log('Token provided:', !!token);

      // Prepare the request payload based on what we have
      const payload: any = {
        password
      };

      // Add either userId or email to the payload
      if (userId) {
        payload.userId = userId;
      } else if (email) {
        payload.email = email;
      }

      // Add token if provided
      if (token) {
        payload.token = token;
      }

      // Try the standard endpoint first
      const response = await apiRequest<any>(
        '/auth/reset-password',
        'PUT',
        payload,
        false
      );

      console.log('Password reset response:', response);

      // Handle different response formats
      if (typeof response === 'string') {
        return { message: response };
      } else if (typeof response === 'object') {
        if (response.message) {
          return { message: response.message };
        } else if (response.success) {
          return { message: 'Your password has been reset successfully.' };
        }
      }

      return { message: 'Password reset successful.' };
    } catch (error) {
      console.error('Password reset failed:', error);
      throw error;
    }
  },

  /**
   * Request a password reset link
   * @param email - User email
   * @returns Response message
   */
  requestPasswordReset: async (email: string): Promise<{ message: string }> => {
    try {
      const response = await apiRequest<{ message: string }>(
        '/auth/request-reset-password',
        'POST',
        { email },
        false
      );
      return response;
    } catch (error) {
      console.error('Password reset request failed:', error);
      throw error;
    }
  },

  /**
   * Validate a password reset token
   * @param token - Reset token to validate
   * @returns Validation result with user ID if valid
   */
  validateResetToken: async (token: string): Promise<{ valid: boolean; userId?: number; email?: string }> => {
    try {
      // Log the token being validated
      console.log('Validating reset token:', token);

      let response;

      // Try several common API endpoint patterns
      try {
        // Try endpoint format with query parameter
        response = await apiRequest<any>(
          `/auth/validate-reset-token?token=${encodeURIComponent(token)}`,
          'GET',
          undefined,
          false
        );
      } catch (firstError) {
        console.log('First validation attempt failed, trying alternative endpoints...');

        try {
          // Try endpoint with token directly in the path
          response = await apiRequest<any>(
            `/auth/validate-reset-token/${encodeURIComponent(token)}`,
            'GET',
            undefined,
            false
          );
        } catch (secondError) {
          // Try POST request with token in body
          try {
            response = await apiRequest<any>(
              '/auth/validate-reset-token',
              'POST',
              { token },
              false
            );
          } catch (thirdError) {
            console.error('All token validation attempts failed');
            // If all endpoints fail, simulate a response for testing
            // Remove this in production
            if (token && token.length > 10) {
              console.log('Using simulated validation response for testing');
              response = { valid: true, email: "test@example.com", userId: 1 };
            } else {
              throw thirdError;
            }
          }
        }
      }

      console.log('Token validation response:', response);

      // Handle different response formats from the API
      if (response && typeof response === 'object') {
        // Create the result object - pass through both userId and email if they exist
        const result: { valid: boolean; userId?: number; email?: string } = {
          valid: false
        };

        // Check if the response has the valid property set to true
        if ('valid' in response && response.valid === true) {
          result.valid = true;

          // Pass through userId if it exists
          if ('userId' in response && (response.userId !== null && response.userId !== undefined)) {
            result.userId = response.userId;
          }

          // Pass through email if it exists
          if ('email' in response && response.email) {
            result.email = response.email;
          }

          // Return early if we have at least valid=true and either userId or email
          if (result.userId !== undefined || result.email) {
            return result;
          } else {
            // If valid is true but no email/userId provided, consider it invalid
            console.error('Token validation failed: Token is valid but no email/userId provided');
            return { valid: false };
          }
        }

        // Legacy support for different API formats
        if ('userId' in response && (response.userId !== null && response.userId !== undefined)) {
          return {
            valid: true,
            userId: response.userId,
            email: response.email
          };
        }

        // If API returns a success property
        if ('success' in response && response.success === true) {
          const successResult: { valid: boolean; userId?: number; email?: string } = {
            valid: true
          };

          if ('email' in response && response.email) {
            successResult.email = response.email;
          }

          if ('userId' in response && (response.userId !== null && response.userId !== undefined)) {
            successResult.userId = response.userId;
          } else if ('id' in response && (response.id !== null && response.id !== undefined)) {
            successResult.userId = response.id;
          }

          if (successResult.email || successResult.userId !== undefined) {
            return successResult;
          } else {
            // If success is true but no email/userId/id, consider it invalid
            console.error('Token validation failed: Success is true but no identifier provided');
            return { valid: false };
          }
        }
      }

      // If response is empty or doesn't match expected format, consider it invalid
      return { valid: false };
    } catch (error) {
      console.error('Token validation failed:', error);
      // Return invalid on error
      return { valid: false };
    }
  },
};

// Project services, user services, etc. can be added here 

/**
 * API service for employee management
 */
export const employeeService = {
  /**
   * Register a new employee
   * @param employeeData - Employee registration data
   * @returns Employee data with ID and success message
   */
  register: async (employeeData: any): Promise<any> => {
    try {
      const response = await apiRequest<any>(
        '/employee/create',
        'POST',
        employeeData,
        true
      );

      // Transform the response if it's a string (which happens when API returns a simple message)
      if (typeof response === 'string') {
        return {
          success: true,
          message: response,
          data: { ...employeeData }
        };
      }

      return response;
    } catch (error) {
      console.error('Employee registration failed:', error);
      throw error;
    }
  },

  /**
   * Update an existing employee
   * @param employeeData - Employee data to update
   * @returns Updated employee data and success message
   */
  update: async (employeeData: any): Promise<any> => {
    try {
      // Handle empty password field - if password is empty, remove it from the request
      const dataToSend = { ...employeeData };
      if (!dataToSend.passwordHash) {
        delete dataToSend.passwordHash;
      }

      const response = await apiRequest<any>(
        `/employee/${employeeData.id}`,
        'PUT',
        dataToSend,
        true
      );

      // Transform the response if it's a string (which happens when API returns a simple message)
      if (typeof response === 'string') {
        return {
          success: true,
          message: response,
          data: { ...employeeData }
        };
      }

      return response;
    } catch (error) {
      console.error('Employee update failed:', error);
      throw error;
    }
  },

  /**
   * Get employee by ID
   * @param id - Employee ID
   * @returns Employee data
   */
  getById: async (id: number): Promise<any> => {
    try {
      const response = await apiRequest<any>(
        `/employee/${id}`,
        'GET',
        undefined,
        true
      );

      return response;
    } catch (error) {
      console.error(`Failed to get employee with ID ${id}:`, error);
      throw error;
    }
  },

  /**
   * Get all employees
   * @returns List of employees
   */
  getAll: async (): Promise<any[]> => {
    try {
      const response = await apiRequest<any[]>(
        '/employee',
        'GET',
        undefined,
        true
      );

      return response;
    } catch (error) {
      console.error('Failed to get employees:', error);
      throw error;
    }
  },

  /**
   * Import multiple employees from CSV data
   * @param employees - Array of employee data objects to import
   * @returns Status of the import operation with counts
   */
  importEmployees: async (employees: any[]): Promise<any> => {
    try {
      // In a real implementation, you would send this to a bulk import endpoint
      const response = await apiRequest<any>(
        '/employee/import',
        'POST',
        { employees },
        true
      );

      // If the endpoint doesn't exist in development, simulate success
      if (response?.status === 404) {
        console.log('Import endpoint not found, simulating successful import');

        // Simulate a successful response with counts
        return {
          success: true,
          message: `Successfully processed ${employees.length} employees`,
          imported: employees.length,
          failed: 0,
          total: employees.length
        };
      }

      return response;
    } catch (error) {
      console.error('Failed to import employees:', error);
      throw error;
    }
  },

  updateEmployee: async (id: number, data: EmployeeType): Promise<EmployeeType> => {
    console.log(`Updating employee: ${id}`);

    const response = await apiClient.put(`${CONFIG_API_URL}/v1/employees/${id}`, {
      id: data.id,
      empCode: data.empCode,
      firstName: data.firstName,
      middleName: data.middleName,
      lastName: data.lastName,
      email: data.email,
      mobile: data.mobile,
      type: data.type,
      academics: data.academics,
      financialData: data.financialData,
      description: data.description,
      userId: data.userId,
      passwordHash: data.passwordHash,
      roleId: data.roleId,
      avatarUrl: data.avatarUrl
    }, {
      headers: {
        'Content-Type': 'application/json',
      }
    });

    if (response.status >= 400) {
      throw new Error(`Failed to update employee: ${response.statusText}`);
    }

    return response.data;
  },
};

/**
 * API service for role management
 */
export const roleService = {
  /**
   * Get all roles
   * @returns List of roles
   */
  getAll: async (): Promise<any[]> => {
    try {
      const response = await apiRequest<any[]>(
        '/Role',
        'GET',
        undefined,
        true
      );

      // Log the raw API response
      console.log('Raw roles API response:', response);

      // Ensure consistent property structure
      const normalizedRoles = Array.isArray(response) ? response.map(role => {
        // Map to ensure consistent structure
        const normalizedRole = { ...role };

        // Ensure roleId exists
        if (normalizedRole.roleId === undefined && normalizedRole.id !== undefined) {
          normalizedRole.roleId = normalizedRole.id;
        }

        // Ensure id exists
        if (normalizedRole.id === undefined && normalizedRole.roleId !== undefined) {
          normalizedRole.id = normalizedRole.roleId;
        }

        return normalizedRole;
      }) : [];

      return normalizedRoles;
    } catch (error) {
      console.error('Failed to get roles:', error);
      throw error;
    }
  },

  /**
   * Get role by ID
   * @param id - Role ID
   * @returns Role data
   */
  getById: async (id: number): Promise<any> => {
    try {
      const response = await apiRequest<any>(
        `/Role/${id}`,
        'GET',
        undefined,
        true
      );

      return response;
    } catch (error) {
      console.error(`Failed to get role with ID ${id}:`, error);
      throw error;
    }
  },

  /**
   * Create a new role
   * @param roleData - Role data
   * @returns Created role data
   */
  create: async (roleData: any): Promise<any> => {
    try {
      const response = await apiRequest<any>(
        '/Role',
        'POST',
        roleData,
        true
      );

      // Transform the response if it's a string
      if (typeof response === 'string') {
        return {
          success: true,
          message: response,
          data: { ...roleData }
        };
      }

      return response;
    } catch (error) {
      console.error('Role creation failed:', error);
      throw error;
    }
  },

  /**
   * Update an existing role
   * @param roleData - Role data to update
   * @returns Updated role data
   */
  update: async (roleData: any): Promise<any> => {
    try {
      console.log("Updating role with data:", roleData);

      // Ensure we're using roleId for the URL
      const roleId = roleData.roleId || roleData.id;

      const response = await apiRequest<any>(
        `/Role/${roleId}`,
        'PUT',
        roleData,
        true
      );

      console.log("Role update response:", response);

      // Transform the response if it's a string
      if (typeof response === 'string') {
        return {
          success: true,
          message: response || `Role '${roleData.roleName}' was updated successfully`,
          data: { ...roleData }
        };
      }

      return {
        success: true,
        message: `Role '${roleData.roleName}' was updated successfully`,
        data: response || { ...roleData }
      };
    } catch (error) {
      console.error('Role update failed:', error);
      throw error;
    }
  },

  /**
   * Delete a role
   * @param id - Role ID
   * @returns Success message
   */
  delete: async (id: number): Promise<any> => {
    try {
      const response = await apiRequest<any>(
        `/Role/${id}`,
        'DELETE',
        undefined,
        true
      );

      return response;
    } catch (error) {
      console.error(`Failed to delete role with ID ${id}:`, error);
      throw error;
    }
  }
};

/**
 * API service for project management
 */
export const projectService = {
  /**
   * Get all projects
   * @returns List of projects
   */
  getAll: async (): Promise<ProjectApi[]> => {
    try {
      console.log('Fetching all projects...');

      // Get the current user session to check role
      const currentUser = userSessionService.getSession();
      console.log('Current user role:', currentUser?.roleName);

      let directUrl = `${API_BASE_URL}/Project`;

      // If user is CEO, COO, or Admin, they should see all projects
      // Otherwise, get projects by employee ID
      if (currentUser?.roleName && ['CEO', 'COO', 'Admin'].includes(currentUser.roleName)) {
        console.log('User has admin-level role, fetching all projects');
        directUrl = `${API_BASE_URL}/Project`;
      } else if (currentUser?.employeeId) {
        console.log(`User is not admin, fetching projects for employee ID: ${currentUser.employeeId}`);
        directUrl = `${API_BASE_URL}/Project/GetProjectsByEmpId/${currentUser.employeeId}`;
      }

      console.log(`Making direct request to: ${directUrl}`);

      const response = await apiClient.get(directUrl, {
        headers: createHeaders(true)
      });

      console.log(`Project response status: ${response.status}`);

      if (response.status >= 400) {
        throw new Error(`Failed to fetch projects: ${response.statusText}`);
      }

      const rawData = response.data;
      console.log(`Projects fetched: ${rawData?.length || 0}`);

      // Inspect the structure of the first project if available
      if (rawData && rawData.length > 0) {
        console.log('First project structure:', JSON.stringify(rawData[0], null, 2));
        console.log('Project properties:', Object.keys(rawData[0]));
      } else {
        console.log('No projects returned from API');
      }

      // Map the API response to the expected ProjectApi format
      const mappedProjects = Array.isArray(rawData)
        ? rawData.map(project => mapApiProject(project))
        : [];

      console.log('Mapped projects:', mappedProjects);

      return mappedProjects;
    } catch (error) {
      console.error('Failed to get projects:', error);
      // Return empty array instead of throwing to prevent UI errors
      return [];
    }
  },

  /**
   * Get projects by employee ID
   * @param employeeId - Employee ID
   * @returns List of projects associated with the employee
   */
  getByEmployeeId: async (employeeId: number): Promise<ProjectApi[]> => {
    try {
      console.log(`Fetching projects for employee ID: ${employeeId}...`);

      const directUrl = `${API_BASE_URL}/Project/GetProjectsByEmpId/${employeeId}`;
      console.log(`Making direct request to: ${directUrl}`);

      const response = await apiClient.get(directUrl, {
        headers: createHeaders(true)
      });

      console.log(`Project response status: ${response.status}`);

      if (response.status >= 400) {
        throw new Error(`Failed to fetch projects for employee ${employeeId}: ${response.statusText}`);
      }

      const rawData = response.data;
      console.log(`Projects fetched for employee: ${rawData?.length || 0}`);

      // Map the API response to the expected ProjectApi format
      const mappedProjects = Array.isArray(rawData)
        ? rawData.map(project => mapApiProject(project))
        : [];

      return mappedProjects;
    } catch (error) {
      console.error(`Failed to get projects for employee ${employeeId}:`, error);
      // Return empty array instead of throwing to prevent UI errors
      return [];
    }
  },

  /**
   * Get project by ID
   * @param id - Project ID
   * @returns Project data
   */
  getById: async (id: number): Promise<any> => {
    try {
      const response = await apiRequest<any>(
        `/Project/${id}`,
        'GET',
        undefined,
        true
      );

      return response;
    } catch (error) {
      console.error(`Failed to get project with ID ${id}:`, error);
      throw error;
    }
  },

  /**
   * Create a new project
   * @param projectData - Project data
   * @returns Created project data
   */
  create: async (projectData: any): Promise<any> => {
    try {
      const response = await apiRequest<any>(
        '/Project',
        'POST',
        projectData,
        true
      );

      // Transform the response if it's a string
      if (typeof response === 'string') {
        return {
          success: true,
          message: response,
          data: { ...projectData }
        };
      }

      return response;
    } catch (error) {
      console.error('Project creation failed:', error);
      throw error;
    }
  },

  /**
   * Update an existing project
   * @param projectData - Project data to update
   * @returns Updated project data
   */
  update: async (projectData: any): Promise<any> => {
    try {
      const response = await apiRequest<any>(
        `/Project/${projectData.id}`,
        'PUT',
        projectData,
        true
      );

      // Transform the response if it's a string
      if (typeof response === 'string') {
        return {
          success: true,
          message: response,
          data: { ...projectData }
        };
      }

      return response;
    } catch (error) {
      console.error('Project update failed:', error);
      throw error;
    }
  },

  /**
   * Delete a project
   * @param id - Project ID
   * @returns Success message
   */
  delete: async (id: number): Promise<any> => {
    try {
      const response = await apiRequest<any>(
        `/Project/${id}`,
        'DELETE',
        undefined,
        true
      );

      return response;
    } catch (error) {
      console.error(`Failed to delete project with ID ${id}:`, error);
      throw error;
    }
  }
};

/**
 * Deliverables API
 */
export const deliverablesApi = {
  /**
   * Get all deliverables
   * @returns List of all deliverables
   */
  getAll: async (): Promise<Deliverable[]> => {
    try {
      console.log('Fetching all deliverables...');

      // Get the current user session to check role
      const currentUser = userSessionService.getSession();
      console.log('Current user role for deliverables access:', currentUser?.roleName);

      // First get the projects the user has access to
      let accessibleProjects: number[] = [];

      // If user is CEO, COO, or Admin, they should see all deliverables
      // Otherwise, only see deliverables from assigned projects
      if (currentUser?.roleName && ['CEO', 'COO', 'Admin'].includes(currentUser.roleName)) {
        console.log('User has admin-level role, fetching all deliverables');
        // Admin-level users don't need to filter by projects
      } else if (currentUser?.employeeId) {
        console.log(`User is not admin, fetching projects for employee ID: ${currentUser.employeeId}`);
        // Get assigned projects first
        const projectsResponse = await projectService.getByEmployeeId(currentUser.employeeId);
        accessibleProjects = projectsResponse.map(project => project.id);
        console.log(`User has access to ${accessibleProjects.length} projects:`, accessibleProjects);
      }

      // Direct fetch with custom options to bypass certificate validation
      const directUrl = `${API_BASE_URL}/Deliverables`;
      console.log(`Making direct request to: ${directUrl}`);

      const response = await apiClient.get(directUrl, {
        headers: createHeaders(true)
      });

      console.log(`Deliverables response status: ${response.status}`);

      if (response.status >= 400) {
        throw new Error(`Failed to fetch deliverables: ${response.statusText}`);
      }

      const data = response.data;
      console.log(`Deliverables fetched: ${data?.length || 0}`);

      // Filter deliverables by project access if the user isn't an admin
      let filteredData = data;
      if (currentUser?.roleName && !['CEO', 'COO', 'Admin'].includes(currentUser.roleName) && accessibleProjects.length > 0) {
        filteredData = data.filter((deliverable: Deliverable) =>
          accessibleProjects.includes(deliverable.projectId)
        );
        console.log(`Filtered to ${filteredData.length} deliverables based on project access`);
      }

      return filteredData;
    } catch (error) {
      console.error('Failed to fetch deliverables:', error);
      // Return empty array instead of throwing to prevent UI errors
      return [];
    }
  },

  /**
   * Get a specific deliverable by ID
   * @param id - Deliverable ID
   * @returns Deliverable data
   */
  getById: async (id: number): Promise<Deliverable> => {
    try {
      const response = await apiRequest<Deliverable>(`/Deliverables/${id}`, 'GET', undefined, true);
      return response;
    } catch (error) {
      console.error(`Failed to fetch deliverable with ID ${id}:`, error);
      throw error;
    }
  },

  /**
   * Get deliverables by project ID
   * @param projectId - Project ID
   * @returns List of deliverables for the project
   */
  getByProjectId: async (projectId: number): Promise<Deliverable[]> => {
    try {
      console.log(`Fetching deliverables for project ID ${projectId}...`);

      // Get the current user session to check role
      const currentUser = userSessionService.getSession();

      // Check if user has access to this project
      let hasAccess = false;

      // Admin roles have access to all projects
      if (currentUser?.roleName && ['CEO', 'COO', 'Admin'].includes(currentUser.roleName)) {
        hasAccess = true;
      } else if (currentUser?.employeeId) {
        // For non-admin users, check if this project is in their assigned projects
        try {
          const userProjects = await projectService.getByEmployeeId(currentUser.employeeId);
          hasAccess = userProjects.some(p => p.id === projectId);
        } catch (error) {
          console.error(`Error checking project access for employee ${currentUser.employeeId}:`, error);
          // Default to no access if there's an error
          hasAccess = false;
        }
      }

      if (!hasAccess) {
        console.warn(`User doesn't have access to project ${projectId}`);
        return []; // Return empty array if no access
      }

      const allDeliverables = await apiRequest<Deliverable[]>('/Deliverables', 'GET', undefined, true);
      return allDeliverables.filter(deliverable => deliverable.projectId === projectId);
    } catch (error) {
      console.error(`Failed to fetch deliverables for project ID ${projectId}:`, error);
      throw error;
    }
  },

  /**
   * Create a new deliverable
   * @param deliverableData - Deliverable data to create
   * @returns Created deliverable data
   */
  create: async (deliverableData: DeliverableCreateRequest): Promise<any> => {
    try {
      const response = await apiRequest<any>(
        '/Deliverables',
        'POST',
        deliverableData,
        true
      );

      return response;
    } catch (error) {
      console.error('Deliverable creation failed:', error);
      throw error;
    }
  },

  /**
   * Update an existing deliverable
   * @param deliverableData - Deliverable data to update
   * @returns Updated deliverable data
   */
  update: async (deliverableData: DeliverableUpdateRequest): Promise<any> => {
    try {
      const response = await apiRequest<any>(
        `/Deliverables/${deliverableData.id}`,
        'PUT',
        deliverableData,
        true
      );

      // Transform the response if it's a string
      if (typeof response === 'string') {
        return {
          success: true,
          message: response,
          data: { ...deliverableData }
        };
      }

      return response;
    } catch (error) {
      console.error('Deliverable update failed:', error);
      throw error;
    }
  },

  /**
   * Delete a deliverable
   * @param id - Deliverable ID
   * @returns Success message
   */
  delete: async (id: number): Promise<any> => {
    try {
      const response = await apiRequest<any>(
        `/Deliverables/${id}`,
        'DELETE',
        undefined,
        true
      );

      return response;
    } catch (error) {
      console.error(`Failed to delete deliverable with ID ${id}:`, error);
      throw error;
    }
  }
};

/**
 * Issues API
 */
export const issuesApi = {
  /**
   * Get all issues
   * @returns List of all issues
   */
  getAll: async (): Promise<IssueApi[]> => {
    try {
      console.log('Fetching all issues...');
      const response = await apiRequest<any[]>('/Issues', 'GET', undefined, true);

      // Map the API response to handle property name differences
      const mappedIssues = Array.isArray(response)
        ? response.map(issue => mapApiIssue(issue))
        : [];

      console.log(`Fetched ${mappedIssues.length} issues`);
      return mappedIssues;
    } catch (error) {
      console.error('Failed to fetch issues:', error);
      throw error;
    }
  },

  /**
   * Get a specific issue by ID
   * @param id - Issue ID
   * @returns Issue data
   */
  getById: async (id: number): Promise<IssueApi> => {
    try {
      const response = await apiRequest<any>(`/Issues/${id}`, 'GET', undefined, true);
      return mapApiIssue(response);
    } catch (error) {
      console.error(`Failed to fetch issue with ID ${id}:`, error);
      throw error;
    }
  },

  /**
   * Get issues by project ID
   * @param projectId - Project ID
   * @returns List of issues for the project
   */
  getByProjectId: async (projectId: number): Promise<IssueApi[]> => {
    try {
      const response = await apiRequest<any[]>('/Issues', 'GET', undefined, true);

      // Map the API response to handle property name differences
      const allIssues = Array.isArray(response)
        ? response.map(issue => mapApiIssue(issue))
        : [];

      // Filter issues by project ID
      return allIssues.filter(issue => issue.projectId === projectId);
    } catch (error) {
      console.error(`Failed to fetch issues for project ID ${projectId}:`, error);
      throw error;
    }
  },

  /**
   * Get issues by deliverable ID
   * @param deliverableId - Deliverable ID
   * @returns List of issues for the deliverable
   */
  getByDeliverableId: async (deliverableId: number): Promise<IssueApi[]> => {
    try {
      console.log(`Fetching issues for deliverable ID ${deliverableId}...`);

      const directUrl = `${API_BASE_URL}/Issues/GetByDeliverableID/${deliverableId}`;
      console.log(`Making direct request to: ${directUrl}`);

      const response = await apiClient.get(directUrl, {
        headers: {
          'Accept': '*/*',
          'Content-Type': 'application/json'
        }
      });

      console.log(`Issues API response status: ${response.status}`);

      if (response.status >= 400) {
        console.error(`Issues API error: ${response.status} ${response.statusText}`);
        console.log('Falling back to regular method...');
        return await fallbackGetIssuesByDeliverableId(deliverableId);
      }

      // Get raw data to inspect
      const rawData = response.data;
      console.log(`Raw issues data from API: Total count = ${Array.isArray(rawData) ? rawData.length : 0}`);

      if (Array.isArray(rawData) && rawData.length > 0) {
        console.log('First issue structure from API:', rawData[0]);

        // Map the API response to our expected format
        const mappedIssues = rawData.map(issue => {
          console.log(`Processing issue ID ${issue.id}, deliverable ID: ${issue.deliverablesId}`);
          return mapApiIssue(issue);
        });

        console.log(`Mapped ${mappedIssues.length} issues for deliverable ID ${deliverableId}`);
        return mappedIssues;
      } else {
        console.log(`No issues found for deliverable ID ${deliverableId} from direct API`);
        return [];
      }
    } catch (error) {
      console.error(`Failed to fetch issues for deliverable ID ${deliverableId}:`, error);
      // Fall back to the original method if the direct endpoint fails
      console.log('Trying fallback method due to error...');
      return await fallbackGetIssuesByDeliverableId(deliverableId);
    }
  },

  /**
   * Create a new issue
   * @param issueData - Issue data to create
   * @returns Created issue data
   */
  create: async (issueData: IssueCreateRequest): Promise<any> => {
    try {
      return await apiRequest<any>(
        '/Issues',
        'POST',
        issueData,
        true
      );
    } catch (error) {
      console.error('Issue creation failed:', error);
      throw error;
    }
  },

  /**
   * Update an existing issue
   * @param issueData - Issue data to update
   * @returns Updated issue data
   */
  update: async (issueData: IssueUpdateRequest): Promise<any> => {
    try {
      return await apiRequest<any>(
        `/Issues/${issueData.id}`,
        'PUT',
        issueData,
        true
      );
    } catch (error) {
      console.error('Issue update failed:', error);
      throw error;
    }
  },

  /**
   * Delete an issue
   * @param id - Issue ID
   */
  delete: async (id: number): Promise<any> => {
    try {
      return await apiRequest<any>(
        `/Issues/${id}`,
        'DELETE',
        undefined,
        true
      );
    } catch (error) {
      console.error(`Failed to delete issue with ID ${id}:`, error);
      throw error;
    }
  },

  /**
   * Create an issue directly using fetch (alternative implementation)
   * This can be helpful when troubleshooting API integration
   * @param issueData - Issue data to create
   * @returns Created issue data
   */
  createDirect: async (issueData: IssueCreateRequest): Promise<any> => {
    try {
      const url = `${API_BASE_URL}/Issues`;
      console.log(`Making direct POST request to: ${url}`);
      console.log('Request data:', JSON.stringify(issueData, null, 2));

      const response = await apiClient.post(url, issueData, {
        headers: {
          'Accept': 'text/plain',
          'Content-Type': 'application/json'
        }
      });

      console.log(`Issue create API response status: ${response.status}`);

      if (response.status >= 400) {
        throw new Error(`API Error: ${response.status}`);
      }

      console.log('Issue created successfully:', response.data);
      return response.data;
    } catch (error) {
      console.error('Issue direct creation failed:', error);
      throw error;
    }
  },
};

// Fallback method to get issues by deliverable ID if the direct endpoint fails
async function fallbackGetIssuesByDeliverableId(deliverableId: number): Promise<IssueApi[]> {
  try {
    console.log(`Using fallback method to get issues for deliverable ID ${deliverableId}`);

    // Get all issues and filter client-side
    const response = await apiRequest<any[]>('/Issues', 'GET', undefined, true);

    // Map the API response to handle property name differences
    const allIssues = Array.isArray(response)
      ? response.map(issue => mapApiIssue(issue))
      : [];

    console.log(`Got ${allIssues.length} issues in fallback, filtering for deliverable ID ${deliverableId}`);

    // Filter issues based on deliverable ID
    const filteredIssues = allIssues.filter(issue => Number(issue.deliverablesId) === Number(deliverableId));

    console.log(`Found ${filteredIssues.length} issues for deliverable ID ${deliverableId} in fallback method`);

    return filteredIssues;
  } catch (error) {
    console.error(`Fallback method for fetching issues also failed:`, error);
    // Return empty array instead of throwing to prevent UI errors
    return [];
  }
}

/**
 * API service for team management
 */
export const teamService = {
  /**
   * Get all teams
   */
  getAll: async (): Promise<Team[]> => {
    return apiRequest<Team[]>('/Team');
  },

  /**
   * Get team by ID
   */
  getById: async (id: number): Promise<Team> => {
    return apiRequest<Team>(`/Team/${id}`);
  },

  /**
   * Create a new team
   */
  create: async (team: TeamCreateRequest): Promise<Team> => {
    return apiRequest<Team>('/Team', 'POST', team);
  },

  /**
   * Update an existing team
   */
  update: async (team: TeamUpdateRequest): Promise<Team> => {
    return apiRequest<Team>(`/Team/${team.id}`, 'PUT', team);
  },

  /**
   * Delete a team
   */
  delete: async (id: number): Promise<void> => {
    return apiRequest<void>(`/Team/${id}`, 'DELETE');
  }
};

/**
 * API service for team member management
 */
export const teamMemberService = {
  /**
   * Get all team members
   */
  getAll: async (): Promise<TeamMember[]> => {
    return apiRequest<TeamMember[]>('/TeamMember');
  },

  /**
   * Get team member by ID
   */
  getById: async (id: number): Promise<TeamMember> => {
    return apiRequest<TeamMember>(`/TeamMember/${id}`);
  },

  /**
   * Create a new team member
   */
  create: async (member: TeamMemberCreateRequest): Promise<TeamMember> => {
    return apiRequest<TeamMember>('/TeamMember', 'POST', member);
  },

  /**
   * Update an existing team member
   */
  update: async (member: TeamMemberUpdateRequest): Promise<TeamMember> => {
    return apiRequest<TeamMember>(`/TeamMember/${member.id}`, 'PUT', member);
  },

  /**
   * Delete a team member
   */
  delete: async (id: number): Promise<void> => {
    return apiRequest<void>(`/TeamMember/${id}`, 'DELETE');
  },

  /**
   * Update team member status (active/released)
   */
  updateStatus: async (id: number, isActive: string): Promise<any> => {
    return apiRequest<any>(
      `/TeamMember/update-is-active/${id}`,
      'PUT',
      isActive, // Pass the string directly as body
      true
    );
  }
};

// ProjectTeam API Service
export const projectTeamService = {
  getAll: async (): Promise<any[]> => {
    try {
      const response = await apiRequest<any[]>('/ProjectTeam');
      return response;
    } catch (error) {
      console.error('Error fetching project teams:', error);
      throw error;
    }
  },

  getById: async (id: number): Promise<any> => {
    try {
      const response = await apiRequest<any>(`/ProjectTeam/${id}`);
      return response;
    } catch (error) {
      console.error(`Error fetching project team ${id}:`, error);
      throw error;
    }
  },

  create: async (projectTeam: any): Promise<any> => {
    try {
      const response = await apiRequest<any>('/ProjectTeam', 'POST', projectTeam);
      return response;
    } catch (error) {
      console.error('Error creating project team:', error);
      throw error;
    }
  },

  update: async (id: number, projectTeam: any): Promise<any> => {
    try {
      const response = await apiRequest<any>(`/ProjectTeam/${id}`, 'PUT', projectTeam);
      return response;
    } catch (error) {
      console.error(`Error updating project team ${id}:`, error);
      throw error;
    }
  },

  delete: async (id: number): Promise<void> => {
    try {
      await apiRequest<void>(`/ProjectTeam/${id}`, 'DELETE');
    } catch (error) {
      console.error(`Error deleting project team ${id}:`, error);
      throw error;
    }
  },

  getByProjectId: async (projectId: number): Promise<any[]> => {
    try {
      const allTeams = await projectTeamService.getAll();
      return allTeams.filter(team => team.projectId === projectId);
    } catch (error) {
      console.error(`Error fetching teams for project ${projectId}:`, error);
      throw error;
    }
  }
};

/**
 * API service for meeting rooms
 */
export const meetingRoomService = {
  /**
   * Get all meeting rooms
   * @returns List of meeting rooms
   */
  getAllRooms: async (): Promise<MeetingRoom[]> => {
    return apiRequest<MeetingRoom[]>('/MeetingRoom', 'GET');
  },

  /**
   * Get meeting room by ID
   * @param id - Meeting room ID
   * @returns Meeting room details
   */
  getRoomById: async (id: number): Promise<MeetingRoom> => {
    return apiRequest<MeetingRoom>(`/MeetingRoom/${id}`, 'GET');
  },

  /**
   * Create new meeting room
   * @param room - Meeting room data
   * @returns Created meeting room
   */
  createRoom: async (room: MeetingRoomCreateRequest): Promise<MeetingRoom> => {
    return apiRequest<MeetingRoom>('/MeetingRoom', 'POST', room);
  },

  /**
   * Update meeting room
   * @param room - Meeting room data with updates
   * @returns Updated meeting room
   */
  updateRoom: async (room: MeetingRoomUpdateRequest): Promise<MeetingRoom> => {
    return apiRequest<MeetingRoom>(`/MeetingRoom/${room.id}`, 'PUT', room);
  },

  /**
   * Delete meeting room
   * @param id - Meeting room ID
   * @returns Success message
   */
  deleteRoom: async (id: number): Promise<void> => {
    return apiRequest<void>(`/MeetingRoom/${id}`, 'DELETE');
  },

  /**
   * Check room availability for a time period
   * @param roomId - Room ID
   * @param startTime - Start time (ISO string)
   * @param endTime - End time (ISO string)
   * @returns Availability status
   */
  checkRoomAvailability: async (
    roomId: number,
    startTime: string,
    endTime: string
  ): Promise<{ isAvailable: boolean }> => {
    return apiRequest<{ isAvailable: boolean }>(
      `/MeetingRoom/${roomId}/availability?startTime=${encodeURIComponent(startTime)}&endTime=${encodeURIComponent(endTime)}`,
      'GET'
    );
  }
};

/**
 * API service for room bookings
 */
export const roomBookingService = {
  /**
   * Get all room bookings
   * @returns List of room bookings
   */
  getAllBookings: async (): Promise<RoomBooking[]> => {
    console.log('Fetching all room bookings');
    try {
      const response = await apiRequest<any[]>('/RoomBooking');
      // Parse bookingAttendees from string to array of numbers
      return response.map((booking: any) => ({
        ...booking,
        attendees: parseAttendees(booking.bookingAttendees)
      }));
    } catch (error) {
      console.error('Error fetching room bookings:', error);
      throw error;
    }
  },

  /**
   * Get room bookings by room ID
   * @param roomId - Room ID
   * @returns List of bookings for the room
   */
  getBookingsByRoomId: async (roomId: number): Promise<RoomBooking[]> => {
    console.log(`Fetching bookings for room ID: ${roomId}`);
    try {
      const response = await apiRequest<any[]>('/RoomBooking/room/' + roomId);
      return response.map((booking: any) => ({
        ...booking,
        attendees: parseAttendees(booking.bookingAttendees)
      }));
    } catch (error) {
      console.error(`Error fetching bookings for room ${roomId}:`, error);
      throw error;
    }
  },

  /**
   * Get room bookings by employee ID
   * @param employeeId - Employee ID
   * @returns List of bookings made by the employee
   */
  getBookingsByEmployeeId: async (employeeId: number): Promise<RoomBooking[]> => {
    console.log(`Fetching bookings for employee ID: ${employeeId}`);
    try {
      const response = await apiRequest<any[]>('/RoomBooking/employee/' + employeeId);
      return response.map((booking: any) => ({
        ...booking,
        attendees: parseAttendees(booking.bookingAttendees)
      }));
    } catch (error) {
      console.error(`Error fetching bookings for employee ${employeeId}:`, error);
      throw error;
    }
  },

  /**
   * Get room booking by ID
   * @param id - Booking ID
   * @returns Booking details
   */
  getBookingById: async (id: number): Promise<RoomBooking> => {
    console.log(`Fetching booking details for ID: ${id}`);
    try {
      const response = await apiRequest<any>(`/RoomBooking/${id}`);
      return {
        ...response,
        attendees: parseAttendees(response.bookingAttendees)
      };
    } catch (error) {
      console.error(`Error fetching booking ${id}:`, error);
      throw error;
    }
  },

  /**
   * Create new room booking
   * @param booking - Booking data
   * @returns Created booking
   */
  createBooking: async (booking: RoomBookingCreateRequest): Promise<RoomBooking> => {
    try {
      console.log('Creating new room booking with data:', booking);

      // Ensure all required fields are present
      const bookingData = {
        ...booking,
        // Ensure roomName is set if missing
        roomName: booking.roomName || 'Meeting Room',
        // Ensure status is set to pending by default
        status: booking.status || 'pending',
        // Set timestamps if not provided
        // Convert attendees array to string format for API
        bookingAttendees: Array.isArray(booking.attendees) ?
          `{${booking.attendees.join(',')}}` :
          '{}'
      };

      const response = await apiRequest<RoomBooking>('/RoomBooking', 'POST', bookingData);
      console.log('Room booking created successfully:', response);

      // Ensure attendees is properly set in the response
      return {
        ...response,
        attendees: parseAttendees(response.bookingAttendees)
      };
    } catch (error) {
      console.error('Failed to create room booking:', error);
      throw error;
    }
  },

  /**
   * Update room booking
   * @param booking - Booking data with updates
   * @returns Updated booking
   */
  updateBooking: async (booking: RoomBookingUpdateRequest): Promise<RoomBooking> => {
    try {
      console.log('Updating booking with data:', booking);

      // Prepare data for API by converting attendees to string format if needed
      const updateData = {
        ...booking,
        // Convert attendees array to string format for API if present
        bookingAttendees: booking.attendees ?
          `{${booking.attendees.join(',')}}` :
          undefined
      };

      const response = await apiRequest<RoomBooking>(`/RoomBooking/${booking.id}`, 'PUT', updateData);

      // Ensure attendees is properly set in the response
      return {
        ...response,
        attendees: parseAttendees(response.bookingAttendees)
      };
    } catch (error) {
      console.error(`Failed to update booking ${booking.id}:`, error);
      throw error;
    }
  },

  /**
   * Delete room booking
   * @param id - Booking ID
   * @returns Success message
   */
  deleteBooking: async (id: number): Promise<void> => {
    try {
      console.log(`Deleting booking ID: ${id}`);
      await apiRequest<void>(`/RoomBooking/${id}`, 'DELETE');
    } catch (error) {
      console.error(`Error deleting booking ${id}:`, error);
      throw error;
    }
  },

  /**
   * Approve booking
   * @param id - Booking ID
   * @returns Updated booking
   */
  approveBooking: async (id: number): Promise<RoomBooking> => {
    try {
      console.log(`Approving booking ID: ${id}`);
      const response = await apiRequest<RoomBooking>(`/RoomBooking/${id}/approve`, 'PUT');
      return {
        ...response,
        attendees: parseAttendees(response.bookingAttendees)
      };
    } catch (error) {
      console.error(`Error approving booking ${id}:`, error);
      throw error;
    }
  },

  /**
   * Reject booking
   * @param id - Booking ID
   * @param reason - Rejection reason
   * @returns Updated booking
   */
  rejectBooking: async (id: number, reason: string): Promise<RoomBooking> => {
    try {
      console.log(`Rejecting booking ID: ${id} with reason: ${reason}`);
      const response = await apiRequest<RoomBooking>(`/RoomBooking/${id}/reject`, 'PUT', { reason });
      return {
        ...response,
        attendees: parseAttendees(response.bookingAttendees)
      };
    } catch (error) {
      console.error(`Error rejecting booking ${id}:`, error);
      throw error;
    }
  },

  /**
   * Cancel booking
   * @param id - Booking ID
   * @returns Updated booking
   */
  cancelBooking: async (id: number): Promise<RoomBooking> => {
    try {
      console.log(`Cancelling booking ID: ${id}`);
      const response = await apiRequest<RoomBooking>(`/RoomBooking/${id}/cancel`, 'PUT');
      return {
        ...response,
        attendees: parseAttendees(response.bookingAttendees)
      };
    } catch (error) {
      console.error(`Error cancelling booking ${id}:`, error);
      throw error;
    }
  },

  /**
   * Get available rooms for a time period
   * @param startTime - Start time (ISO string)
   * @param endTime - End time (ISO string)
   * @param minCapacity - Minimum capacity required
   * @returns List of available rooms
   */
  getAvailableRooms: async (
    startTime: string,
    endTime: string,
    minCapacity?: number
  ): Promise<MeetingRoom[]> => {
    try {
      console.log(`Finding available rooms from ${startTime} to ${endTime} with min capacity: ${minCapacity || 'any'}`);
      const queryParams = new URLSearchParams();
      queryParams.append('startTime', startTime);
      queryParams.append('endTime', endTime);
      if (minCapacity) {
        queryParams.append('minCapacity', minCapacity.toString());
      }

      return apiRequest<MeetingRoom[]>(`/MeetingRoom/available?${queryParams.toString()}`, 'GET');
    } catch (error) {
      console.error('Error finding available rooms:', error);
      throw error;
    }
  }
};

// Helper function to parse attendees string into array of numbers
function parseAttendees(attendeesString: string | null | undefined): number[] {
  if (!attendeesString) return [];

  try {
    // Handle format like "{101, 102, 103}"
    if (typeof attendeesString === 'string') {
      // Remove braces and split by comma
      const cleanString = attendeesString.replace(/[{}]/g, '');
      return cleanString.split(',').map(id => parseInt(id.trim())).filter(id => !isNaN(id));
    }

    // If it's already an array, return it
    if (Array.isArray(attendeesString)) {
      return attendeesString;
    }

    return [];
  } catch (error) {
    console.error('Error parsing attendees:', error);
    return [];
  }
}

/**
 * API service for maintenance AMC dates
 */
export const maintenanceAmcDateService = {
  /**
   * Get all maintenance AMC dates
   * @returns List of maintenance AMC dates
   */
  getAll: async (): Promise<MaintenanceAmcDate[]> => {
    try {
      const response = await apiRequest<MaintenanceAmcDate[]>(
        '/MaintenanceAmcDates',
        'GET',
        undefined,
        true
      );
      return response;
    } catch (error) {
      console.error('Failed to get maintenance AMC dates:', error);
      return [];
    }
  },

  /**
   * Get maintenance AMC date by ID
   * @param id - Maintenance AMC date ID
   * @returns Maintenance AMC date data
   */
  getById: async (id: number): Promise<MaintenanceAmcDate> => {
    try {
      const response = await apiRequest<MaintenanceAmcDate>(
        `/MaintenanceAmcDates/${id}`,
        'GET',
        undefined,
        true
      );
      return response;
    } catch (error) {
      console.error(`Failed to get maintenance AMC date with ID ${id}:`, error);
      throw error;
    }
  },

  /**
   * Get maintenance AMC dates by project ID
   * @param projectId - Project ID
   * @returns List of maintenance AMC dates for the project
   */
  getByProjectId: async (projectId: number): Promise<MaintenanceAmcDate[]> => {
    try {
      const allData = await maintenanceAmcDateService.getAll();
      return allData.filter(item => item.projectId === projectId);
    } catch (error) {
      console.error(`Failed to get maintenance AMC dates for project ${projectId}:`, error);
      return [];
    }
  },

  /**
   * Create a new maintenance AMC date
   * @param data - Maintenance AMC date data
   * @returns Created maintenance AMC date data
   */
  create: async (data: MaintenanceAmcDateCreateRequest): Promise<MaintenanceAmcDate> => {
    try {
      const response = await apiRequest<MaintenanceAmcDate>(
        '/MaintenanceAmcDates',
        'POST',
        data,
        true
      );
      return response;
    } catch (error) {
      console.error('Failed to create maintenance AMC date:', error);
      throw error;
    }
  },

  /**
   * Update an existing maintenance AMC date
   * @param data - Maintenance AMC date data to update
   * @returns Updated maintenance AMC date data
   */
  update: async (data: MaintenanceAmcDateUpdateRequest): Promise<MaintenanceAmcDate> => {
    try {
      const response = await apiRequest<MaintenanceAmcDate>(
        `/MaintenanceAmcDates/${data.maintenanceId}`,
        'PUT',
        data,
        true
      );
      return response;
    } catch (error) {
      console.error(`Failed to update maintenance AMC date with ID ${data.maintenanceId}:`, error);
      throw error;
    }
  },

  /**
   * Delete a maintenance AMC date
   * @param id - Maintenance AMC date ID
   * @returns Success message
   */
  delete: async (id: number): Promise<void> => {
    try {
      await apiRequest<void>(
        `/MaintenanceAmcDates/${id}`,
        'DELETE',
        undefined,
        true
      );
    } catch (error) {
      console.error(`Failed to delete maintenance AMC date with ID ${id}:`, error);
      throw error;
    }
  }
};

// Release Dates service
export const releaseDateService = {
  getAll: async (): Promise<ReleaseDate[]> => {
    return await apiRequest<ReleaseDate[]>('/ReleaseDates');
  },

  getById: async (id: number): Promise<ReleaseDate> => {
    return await apiRequest<ReleaseDate>(`/ReleaseDates/${id}`);
  },

  getByProjectId: async (projectId: number): Promise<ReleaseDate[]> => {
    return await apiRequest<ReleaseDate[]>(`/ReleaseDates/ByProject/${projectId}`);
  },

  create: async (data: ReleaseDateCreateRequest): Promise<ReleaseDate> => {
    return await apiRequest<ReleaseDate>('/ReleaseDates', 'POST', data);
  },

  update: async (data: ReleaseDateUpdateRequest): Promise<ReleaseDate> => {
    return await apiRequest<ReleaseDate>(`/ReleaseDates/${data.releaseId}`, 'PUT', data);
  },

  delete: async (id: number): Promise<void> => {
    return await apiRequest<void>(`/ReleaseDates/${id}`, 'DELETE');
  }
};

// Gantt Chart Types
export interface GanttTaskDto {
  id: number;
  name: string | null;
  start: string | null;
  end: string | null;
  assignee: string | null;
}

export interface GanttFeatureDto {
  id: number;
  name: string | null;
  start: string | null;
  end: string | null;
  assignee: string | null;
  tasks: GanttTaskDto[];
}

export interface GanttDeliverableDto {
  id: number;
  name: string | null;
  start: string | null;
  end: string | null;
  features: GanttFeatureDto[];
}

export interface GanttChartResponseDto {
  deliverables: GanttDeliverableDto[];
}

// Gantt Chart service
export const ganttChartService = {
  /**
   * Get Gantt chart data by project ID
   * @param projectId - Project ID
   * @returns Gantt chart data with deliverables, features, and tasks
   */
  getByProjectId: async (projectId: number): Promise<GanttChartResponseDto> => {
    try {
      const response = await apiRequest<GanttChartResponseDto>(
        `/GanttChart/project/${projectId}`,
        'GET',
        undefined,
        true
      );
      return response;
    } catch (error) {
      console.error(`Failed to get Gantt chart data for project ${projectId}:`, error);
      throw error;
    }
  }
};

// Project Hierarchy Types
export interface PMPTask {
  taskId: string;
  taskName: string;
  description: string;
  phase: string | null;
  owner: string | null;
  dependency: string | null;
  status: string;
  startDate: string;
  endDate: string;
  estimatedHours: number;
}

export interface PMPFeature {
  featureId: number;
  featureName: string;
  startDate: string | null;
  endDate: string | null;
  tasks: PMPTask[];
}

export interface PMPDeliverable {
  deliverableId: number;
  deliverableName: string;
  startDate: string | null;
  endDate: string | null;
  features: PMPFeature[];
}

export interface PMPProject {
  projectId: number;
  projectCode: string;
  projectName: string;
  startDate: string;
  endDate: string;
  status: string | null;
  deliverables: PMPDeliverable[];
}

export interface ProjectHierarchyResponse {
  project: PMPProject;
}

// Project Hierarchy Service
export const projectHierarchyService = {
  /**
   * Get project hierarchy by project ID
   * @param projectId - Project ID
   * @returns Project hierarchy with deliverables, features, and tasks
   */
  getByProjectId: async (projectId: number): Promise<ProjectHierarchyResponse> => {
    try {
      const response = await apiRequest<ProjectHierarchyResponse>(
        `/Project/GetProjectHierarchyByProjectId/${projectId}`,
        'GET',
        undefined,
        true
      );
      return response;
    } catch (error) {
      console.error(`Failed to get project hierarchy for project ${projectId}:`, error);
      throw error;
    }
  }
};