import { API_BASE_URL } from '../config/api';

export interface JobPosition {
  id: number;
  title: string;
  slug: string;
  department: string;
  employment_type: string;
  location_type: string;
  location: string;
  open_positions: number;
  experience_required?: string;
  salary_min?: number;
  salary_max?: number;
  salary_currency: string;
  salary_period: string;
  salary_additional?: string;
  short_description?: string;
  about_role?: string;
  requirements?: string[];
  responsibilities?: string[];
  qualifications?: string[];
  bonus_points?: string[];
  benefits?: string[];
  start_date: string;
  posted_date: string;
  updated_date: string;
  deadline?: string;
  status: string;
  featured?: boolean;
}

export interface JobApplication {
  job: number;
  first_name: string;
  last_name: string;
  email: string;
  phone?: string;
  current_position?: string;
  current_company?: string;
  years_of_experience?: string;
  cover_letter?: string;
  resume: File;
  portfolio_url?: string;
  linkedin_url?: string;
  github_url?: string;
  website_url?: string;
  available_from?: string;
  notice_period?: string;
  expected_salary?: number;
  salary_currency?: string;
  consent: boolean;
}

class CareerService {
  private baseUrl = `${API_BASE_URL}/api/career`;

  /**
   * Get all active job positions
   */
  async getAllJobs(): Promise<JobPosition[]> {
    try {
      const response = await fetch(`${this.baseUrl}/jobs/`, {
        method: 'GET',
        headers: {
          'Content-Type': 'application/json',
        },
      });

      if (!response.ok) {
        throw new Error(`Failed to fetch jobs: ${response.statusText}`);
      }

      const data = await response.json();
      // Handle paginated response - extract results array
      return data.results || data;
    } catch (error) {
      console.error('Error fetching jobs:', error);
      throw error;
    }
  }

  /**
   * Get a single job position by slug
   */
  async getJobBySlug(slug: string): Promise<JobPosition> {
    try {
      const response = await fetch(`${this.baseUrl}/jobs/${slug}/`, {
        method: 'GET',
        headers: {
          'Content-Type': 'application/json',
        },
      });

      if (!response.ok) {
        throw new Error(`Failed to fetch job: ${response.statusText}`);
      }

      const data = await response.json();
      return data;
    } catch (error) {
      console.error('Error fetching job:', error);
      throw error;
    }
  }

  /**
   * Get featured job positions
   */
  async getFeaturedJobs(): Promise<JobPosition[]> {
    try {
      const response = await fetch(`${this.baseUrl}/jobs/featured/`, {
        method: 'GET',
        headers: {
          'Content-Type': 'application/json',
        },
      });

      if (!response.ok) {
        throw new Error(`Failed to fetch featured jobs: ${response.statusText}`);
      }

      const data = await response.json();
      // Handle paginated response - extract results array
      return data.results || data;
    } catch (error) {
      console.error('Error fetching featured jobs:', error);
      throw error;
    }
  }

  /**
   * Submit a job application
   */
  async submitApplication(applicationData: JobApplication): Promise<any> {
    try {
      const formData = new FormData();
      
      // Append all fields to FormData
      formData.append('job', applicationData.job.toString());
      formData.append('first_name', applicationData.first_name);
      formData.append('last_name', applicationData.last_name);
      formData.append('email', applicationData.email);
      formData.append('consent', applicationData.consent.toString());
      
      // Append resume file
      if (applicationData.resume) {
        formData.append('resume', applicationData.resume);
      }
      
      // Append optional fields
      if (applicationData.phone) formData.append('phone', applicationData.phone);
      if (applicationData.current_position) formData.append('current_position', applicationData.current_position);
      if (applicationData.current_company) formData.append('current_company', applicationData.current_company);
      if (applicationData.years_of_experience) formData.append('years_of_experience', applicationData.years_of_experience);
      if (applicationData.cover_letter) formData.append('cover_letter', applicationData.cover_letter);
      if (applicationData.portfolio_url) formData.append('portfolio_url', applicationData.portfolio_url);
      if (applicationData.linkedin_url) formData.append('linkedin_url', applicationData.linkedin_url);
      if (applicationData.github_url) formData.append('github_url', applicationData.github_url);
      if (applicationData.website_url) formData.append('website_url', applicationData.website_url);
      if (applicationData.available_from) formData.append('available_from', applicationData.available_from);
      if (applicationData.notice_period) formData.append('notice_period', applicationData.notice_period);
      if (applicationData.expected_salary) formData.append('expected_salary', applicationData.expected_salary.toString());
      if (applicationData.salary_currency) formData.append('salary_currency', applicationData.salary_currency);

      const response = await fetch(`${this.baseUrl}/applications/`, {
        method: 'POST',
        body: formData,
        // Don't set Content-Type header - browser will set it with boundary for multipart/form-data
      });

      if (!response.ok) {
        const errorData = await response.json();
        throw new Error(errorData.error || `Failed to submit application: ${response.statusText}`);
      }

      const data = await response.json();
      return data;
    } catch (error) {
      console.error('Error submitting application:', error);
      throw error;
    }
  }

  /**
   * Filter jobs by department
   */
  async getJobsByDepartment(department: string): Promise<JobPosition[]> {
    try {
      const response = await fetch(`${this.baseUrl}/jobs/?department=${department}`, {
        method: 'GET',
        headers: {
          'Content-Type': 'application/json',
        },
      });

      if (!response.ok) {
        throw new Error(`Failed to fetch jobs: ${response.statusText}`);
      }

      const data = await response.json();
      // Handle paginated response - extract results array
      return data.results || data;
    } catch (error) {
      console.error('Error fetching jobs by department:', error);
      throw error;
    }
  }

  /**
   * Filter jobs by employment type
   */
  async getJobsByEmploymentType(employmentType: string): Promise<JobPosition[]> {
    try {
      const response = await fetch(`${this.baseUrl}/jobs/?employment_type=${employmentType}`, {
        method: 'GET',
        headers: {
          'Content-Type': 'application/json',
        },
      });

      if (!response.ok) {
        throw new Error(`Failed to fetch jobs: ${response.statusText}`);
      }

      const data = await response.json();
      // Handle paginated response - extract results array
      return data.results || data;
    } catch (error) {
      console.error('Error fetching jobs by employment type:', error);
      throw error;
    }
  }
}

export const careerService = new CareerService();