#!/usr/bin/env node
/**
 * Import CSV data into Directus
 *
 * Usage: node import-csv.js <csv-file> <collection-name>
 *
 * Example: node import-csv.js ../data/artworks.csv artworks
 */

const fs = require('fs');
const path = require('path');
const https = require('https');
const readline = require('readline');

// Configuration
const DIRECTUS_URL = process.env.DIRECTUS_URL || 'https://katheryn-cms.jeffemmett.com';
const DIRECTUS_TOKEN = process.env.DIRECTUS_TOKEN;

// Field mapping from Airtable to Directus
// Adjust these based on your actual Airtable columns
const FIELD_MAPPINGS = {
  artworks: {
    'Name': 'title',
    'Title': 'title',
    'Description': 'description',
    'Year': 'year',
    'Medium': 'medium',
    'Dimensions': 'dimensions',
    'Price': 'price',
    'Status': 'status',
    'Series': 'series_name', // Will need to resolve to ID
    'Tags': 'tag_names',     // Will need to resolve to IDs
    'Zettle ID': 'zettle_product_id',
    'Image URL': 'image_url', // Will need to upload
  },
  series: {
    'Name': 'name',
    'Description': 'description',
  },
  events: {
    'Name': 'title',
    'Title': 'title',
    'Start Date': 'start_date',
    'End Date': 'end_date',
    'Location': 'location',
    'Description': 'description',
  }
};

function parseCSV(content) {
  const lines = content.split('\n');
  if (lines.length === 0) return [];

  // Parse header
  const header = parseCSVLine(lines[0]);
  const records = [];

  for (let i = 1; i < lines.length; i++) {
    const line = lines[i].trim();
    if (!line) continue;

    const values = parseCSVLine(line);
    const record = {};

    header.forEach((col, idx) => {
      record[col] = values[idx] || '';
    });

    records.push(record);
  }

  return records;
}

function parseCSVLine(line) {
  const result = [];
  let current = '';
  let inQuotes = false;

  for (let i = 0; i < line.length; i++) {
    const char = line[i];

    if (char === '"') {
      if (inQuotes && line[i + 1] === '"') {
        current += '"';
        i++;
      } else {
        inQuotes = !inQuotes;
      }
    } else if (char === ',' && !inQuotes) {
      result.push(current.trim());
      current = '';
    } else {
      current += char;
    }
  }

  result.push(current.trim());
  return result;
}

function mapFields(record, collection) {
  const mapping = FIELD_MAPPINGS[collection] || {};
  const mapped = {};

  for (const [airtableField, value] of Object.entries(record)) {
    const directusField = mapping[airtableField] || airtableField.toLowerCase().replace(/\s+/g, '_');

    // Skip empty values
    if (value === '' || value === undefined) continue;

    // Type conversions
    if (directusField === 'year' || directusField === 'price') {
      const num = parseFloat(value.replace(/[^0-9.-]/g, ''));
      if (!isNaN(num)) mapped[directusField] = num;
    } else if (directusField === 'status') {
      // Map common status values
      const statusMap = {
        'available': 'published',
        'sold': 'sold',
        'draft': 'draft',
        'published': 'published',
        'archived': 'archived'
      };
      mapped[directusField] = statusMap[value.toLowerCase()] || 'draft';
    } else if (directusField.endsWith('_date')) {
      // Parse dates
      const date = new Date(value);
      if (!isNaN(date)) {
        mapped[directusField] = date.toISOString().split('T')[0];
      }
    } else {
      mapped[directusField] = value;
    }
  }

  // Set default status if not present
  if (!mapped.status) {
    mapped.status = 'draft';
  }

  return mapped;
}

async function createItem(collection, data) {
  return new Promise((resolve, reject) => {
    const url = new URL(`/items/${collection}`, DIRECTUS_URL);
    const postData = JSON.stringify(data);

    const options = {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
        'Authorization': `Bearer ${DIRECTUS_TOKEN}`,
        'Content-Length': Buffer.byteLength(postData)
      }
    };

    const req = https.request(url, options, (res) => {
      let body = '';
      res.on('data', chunk => body += chunk);
      res.on('end', () => {
        try {
          const result = JSON.parse(body);
          if (res.statusCode >= 200 && res.statusCode < 300) {
            resolve(result.data);
          } else {
            reject(new Error(`HTTP ${res.statusCode}: ${JSON.stringify(result.errors || result)}`));
          }
        } catch (e) {
          reject(new Error(`Parse error: ${body}`));
        }
      });
    });

    req.on('error', reject);
    req.write(postData);
    req.end();
  });
}

async function main() {
  const args = process.argv.slice(2);

  if (args.length < 2) {
    console.log('Usage: node import-csv.js <csv-file> <collection-name>');
    console.log('');
    console.log('Example: node import-csv.js ../data/artworks.csv artworks');
    console.log('');
    console.log('Environment variables:');
    console.log('  DIRECTUS_URL    - Directus API URL (default: https://katheryn-cms.jeffemmett.com)');
    console.log('  DIRECTUS_TOKEN  - Directus admin token (required)');
    console.log('');
    console.log('Supported collections: artworks, series, events');
    process.exit(1);
  }

  if (!DIRECTUS_TOKEN) {
    console.error('Error: DIRECTUS_TOKEN environment variable is required');
    console.error('');
    console.error('To get a token:');
    console.error('1. Log in to Directus admin at ' + DIRECTUS_URL);
    console.error('2. Go to Settings → Access Tokens');
    console.error('3. Create a new static token');
    process.exit(1);
  }

  const [csvFile, collection] = args;
  const csvPath = path.resolve(csvFile);

  if (!fs.existsSync(csvPath)) {
    console.error(`Error: File not found: ${csvPath}`);
    process.exit(1);
  }

  console.log(`Importing ${csvPath} into ${collection}...`);
  console.log('');

  const content = fs.readFileSync(csvPath, 'utf-8');
  const records = parseCSV(content);

  console.log(`Found ${records.length} records`);
  console.log('');

  // Show first record for verification
  if (records.length > 0) {
    console.log('Sample record (first row):');
    console.log(JSON.stringify(records[0], null, 2));
    console.log('');

    const mapped = mapFields(records[0], collection);
    console.log('Mapped to Directus:');
    console.log(JSON.stringify(mapped, null, 2));
    console.log('');
  }

  // Ask for confirmation
  const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
  });

  await new Promise(resolve => {
    rl.question(`Import ${records.length} records into '${collection}'? (y/N) `, (answer) => {
      rl.close();
      if (answer.toLowerCase() !== 'y') {
        console.log('Aborted');
        process.exit(0);
      }
      resolve();
    });
  });

  // Import records
  let success = 0;
  let failed = 0;

  for (let i = 0; i < records.length; i++) {
    const record = records[i];
    const mapped = mapFields(record, collection);

    // Remove fields that need special handling
    delete mapped.series_name;
    delete mapped.tag_names;
    delete mapped.image_url;

    try {
      const result = await createItem(collection, mapped);
      console.log(`[${i + 1}/${records.length}] Created: ${mapped.title || mapped.name || result.id}`);
      success++;
    } catch (err) {
      console.error(`[${i + 1}/${records.length}] Failed: ${err.message}`);
      failed++;
    }

    // Small delay to avoid rate limiting
    await new Promise(r => setTimeout(r, 100));
  }

  console.log('');
  console.log(`Import complete: ${success} succeeded, ${failed} failed`);
}

main().catch(console.error);