import axios from 'axios';
import * as cheerio from 'cheerio';
import type { Filament } from '../../types/filament';

// Mock data for development - replace with actual Confluence API integration
const mockFilaments: Filament[] = [
  { brand: "BambuLab", tip: "PLA", finish: "Basic", boja: "Mistletoe Green", refill: "", vakum: "vakuum x1", otvoreno: "otvorena x1", kolicina: "2", cena: "" },
  { brand: "BambuLab", tip: "PLA", finish: "Basic", boja: "Indigo Purple", refill: "", vakum: "", otvoreno: "otvorena", kolicina: "", cena: "" },
  { brand: "BambuLab", tip: "PLA", finish: "Basic", boja: "Black", refill: "", vakum: "", otvoreno: "2x otvorena", kolicina: "2", cena: "" },
  { brand: "BambuLab", tip: "PLA", finish: "Basic", boja: "Black", refill: "Da", vakum: "vakuum", otvoreno: "", kolicina: "", cena: "" },
  { brand: "BambuLab", tip: "PLA", finish: "Basic", boja: "Jade White", refill: "", vakum: "vakuum", otvoreno: "", kolicina: "", cena: "" },
  { brand: "BambuLab", tip: "PLA", finish: "Basic", boja: "Gray", refill: "", vakum: "vakuum", otvoreno: "", kolicina: "", cena: "" },
  { brand: "BambuLab", tip: "PLA", finish: "Basic", boja: "Red", refill: "", vakum: "vakuum", otvoreno: "", kolicina: "", cena: "" },
  { brand: "BambuLab", tip: "PLA", finish: "Basic", boja: "Hot Pink", refill: "", vakum: "vakuum", otvoreno: "", kolicina: "", cena: "" },
  { brand: "BambuLab", tip: "PLA", finish: "Basic", boja: "Cocoa Brown", refill: "", vakum: "", otvoreno: "otvorena", kolicina: "", cena: "" },
  { brand: "BambuLab", tip: "PLA", finish: "Basic", boja: "White", refill: "", vakum: "", otvoreno: "otvorena", kolicina: "", cena: "" },
  { brand: "BambuLab", tip: "PLA", finish: "Basic", boja: "Cotton Candy Cloud", refill: "", vakum: "", otvoreno: "otvorena", kolicina: "", cena: "" },
  { brand: "BambuLab", tip: "PLA", finish: "Basic", boja: "Sunflower Yellow", refill: "", vakum: "vakuum", otvoreno: "", kolicina: "", cena: "" },
  { brand: "BambuLab", tip: "PLA", finish: "Basic", boja: "Yellow", refill: "", vakum: "", otvoreno: "otvorena", kolicina: "", cena: "" },
  { brand: "BambuLab", tip: "PLA", finish: "Basic", boja: "Magenta", refill: "", vakum: "", otvoreno: "otvorena", kolicina: "", cena: "" },
  { brand: "BambuLab", tip: "PLA", finish: "Basic", boja: "Beige", refill: "", vakum: "", otvoreno: "otvorena", kolicina: "", cena: "" },
  { brand: "BambuLab", tip: "PLA", finish: "Basic", boja: "Cyan", refill: "", vakum: "vakuum", otvoreno: "", kolicina: "", cena: "" },
  { brand: "BambuLab", tip: "PLA", finish: "Matte", boja: "Scarlet Red", refill: "", vakum: "", otvoreno: "otvorena", kolicina: "", cena: "" },
  { brand: "BambuLab", tip: "PLA", finish: "Matte", boja: "Mandarin Orange", refill: "", vakum: "", otvoreno: "otvorena", kolicina: "", cena: "" },
  { brand: "BambuLab", tip: "PLA", finish: "Matte", boja: "Marine Blue", refill: "", vakum: "", otvoreno: "otvorena", kolicina: "", cena: "" },
  { brand: "BambuLab", tip: "PLA", finish: "Matte", boja: "Charcoal", refill: "", vakum: "", otvoreno: "otvorena", kolicina: "", cena: "" },
  { brand: "BambuLab", tip: "PLA", finish: "Matte", boja: "Ivory White", refill: "", vakum: "", otvoreno: "otvorena", kolicina: "", cena: "" }
];

interface ConfluencePageContent {
  body: {
    storage?: {
      value: string;
    };
    view?: {
      value: string;
    };
  };
}

async function fetchFromConfluence(): Promise<Filament[]> {
  const confluenceUrl = process.env.CONFLUENCE_API_URL || process.env.VITE_CONFLUENCE_API_URL;
  const confluenceToken = process.env.CONFLUENCE_TOKEN || process.env.VITE_CONFLUENCE_TOKEN;
  const pageId = process.env.CONFLUENCE_PAGE_ID || process.env.VITE_CONFLUENCE_PAGE_ID;

  if (!confluenceUrl || !confluenceToken || !pageId) {
    console.warn('Confluence configuration missing, using mock data');
    return mockFilaments;
  }

  try {
    const response = await axios.get<ConfluencePageContent>(
      `${confluenceUrl}/rest/api/content/${pageId}?expand=body.storage`,
      {
        headers: {
          'Authorization': `Bearer ${confluenceToken}`,
          'Accept': 'application/json'
        }
      }
    );

    const htmlContent = response.data.body.storage?.value || '';
    return parseConfluenceTable(htmlContent);
  } catch (error) {
    console.error('Failed to fetch from Confluence:', error);
    return mockFilaments;
  }
}

function parseConfluenceTable(html: string): Filament[] {
  const $ = cheerio.load(html);
  const filaments: Filament[] = [];
  
  // Find all tables and process each one
  $('table').each((_tableIndex, table) => {
    let headers: string[] = [];
    
    // Get headers
    $(table).find('tr').first().find('th, td').each((_i, cell) => {
      headers.push($(cell).text().trim());
    });
    
    // Skip if not our filament table (check for expected headers)
    if (!headers.includes('Boja') || !headers.includes('Brand')) {
      return;
    }
    
    // Process rows
    $(table).find('tr').slice(1).each((_rowIndex, row) => {
      const cells = $(row).find('td');
      if (cells.length >= headers.length) {
        const filament: any = {};
        
        cells.each((cellIndex, cell) => {
          const headerName = headers[cellIndex];
          const cellText = $(cell).text().trim();
          
          // Map headers to our expected structure
          switch(headerName.toLowerCase()) {
            case 'brand':
              filament.brand = cellText;
              break;
            case 'tip':
              filament.tip = cellText;
              break;
            case 'finish':
              filament.finish = cellText;
              break;
            case 'boja':
              filament.boja = cellText;
              break;
            case 'refill':
              filament.refill = cellText;
              break;
            case 'vakum':
              filament.vakum = cellText;
              break;
            case 'otvoreno':
              filament.otvoreno = cellText;
              break;
            case 'količina':
              filament.kolicina = cellText;
              break;
            case 'cena':
              filament.cena = cellText;
              break;
          }
        });
        
        // Only add if we have the required fields
        if (filament.brand && filament.boja) {
          filaments.push(filament as Filament);
        }
      }
    });
  });
  
  return filaments.length > 0 ? filaments : mockFilaments;
}

export async function handler(event: any) {
  // For AWS Amplify
  if (event.httpMethod !== 'GET') {
    return {
      statusCode: 405,
      body: JSON.stringify({ error: 'Method not allowed' })
    };
  }

  try {
    const filaments = await fetchFromConfluence();
    
    return {
      statusCode: 200,
      headers: {
        'Content-Type': 'application/json',
        'Cache-Control': 'max-age=300' // 5 minutes cache
      },
      body: JSON.stringify(filaments)
    };
  } catch (error) {
    return {
      statusCode: 500,
      body: JSON.stringify({ 
        error: 'Failed to fetch filaments',
        message: error instanceof Error ? error.message : 'Unknown error'
      })
    };
  }
}

// For local development with Vite
export default async function(req: Request): Promise<Response> {
  if (req.method !== 'GET') {
    return new Response('Method not allowed', { status: 405 });
  }

  try {
    const filaments = await fetchFromConfluence();
    return new Response(JSON.stringify(filaments), {
      headers: {
        'Content-Type': 'application/json',
        'Cache-Control': 'max-age=300'
      }
    });
  } catch (error) {
    return new Response(JSON.stringify({ 
      error: 'Failed to fetch filaments',
      message: error instanceof Error ? error.message : 'Unknown error'
    }), { 
      status: 500,
      headers: { 'Content-Type': 'application/json' }
    });
  }
}