/**
 * Plans, cutting list, and packing routes
 */
import { generateAllPlans, generatePDFHtml } from '../services/planGenerator.js';
import { generateCuttingList, formatCuttingListForExport } from '../services/cuttingEngine.js';
import { generatePackingList } from '../services/packingEngine.js';
import { generateCncProgram } from '../services/cncGenerator.js';
import { validateConfig } from '../services/configValidation.js';
import { generateHardwareList } from '../services/hardwareListEngine.js';
import { generateMprZipBuffer, generateMprPieceDownload } from '../services/mprGenerator.js';

/**
 * POST /api/plans/generate
 * Generate all 2D plans for a configuration
 */
export async function generatePlansRoute(req, res) {
  try {
    const { config, modules = [], colors = {} } = req.body;

    if (!config) {
      return res.status(400).json({ error: 'Configuration requise' });
    }
    const validation = validateConfig(config);
    if (validation.errors.length > 0) {
      return res.status(400).json({ error: 'Configuration invalide', details: validation.errors });
    }

    const plans = generateAllPlans(config, modules, colors);
    res.json({ success: true, plans, warnings: validation.warnings });

  } catch (error) {
    console.error('Plan generation error:', error);
    res.status(500).json({ error: error.message || 'Erreur de génération des plans' });
  }
}

/**
 * POST /api/plans/cutting-list
 * Generate cutting list + packing list for a configuration
 */
export async function generateCuttingListRoute(req, res) {
  try {
    const { config, modules = [], colors = {} } = req.body;

    if (!config) {
      return res.status(400).json({ error: 'Configuration requise' });
    }
    const validation = validateConfig(config);
    if (validation.errors.length > 0) {
      return res.status(400).json({ error: 'Configuration invalide', details: validation.errors });
    }

    const cuttingList = generateCuttingList(config, colors, modules);
    const packing = generatePackingList(cuttingList);

    res.json({ success: true, cuttingList, packing, warnings: validation.warnings });

  } catch (error) {
    console.error('Cutting list error:', error);
    res.status(500).json({ error: error.message || 'Erreur de génération de la liste de débitage' });
  }
}

/**
 * POST /api/plans/export-text
 * Export cutting list as text file
 */
export async function exportCuttingListText(req, res) {
  try {
    const { config, modules = [], colors = {} } = req.body;

    if (!config) {
      return res.status(400).json({ error: 'Configuration requise' });
    }
    const validation = validateConfig(config);
    if (validation.errors.length > 0) {
      return res.status(400).json({ error: 'Configuration invalide', details: validation.errors });
    }

    const cuttingList = generateCuttingList(config, colors, modules);
    const textContent = formatCuttingListForExport(cuttingList);

    res.setHeader('Content-Type', 'text/plain; charset=utf-8');
    res.setHeader('Content-Disposition', 'attachment; filename="liste-debitage.txt"');
    res.send(textContent);

  } catch (error) {
    console.error('Export text error:', error);
    res.status(500).json({ error: error.message || 'Erreur d\'export' });
  }
}

/**
 * POST /api/plans/export-pdf
 * Export plans, cutting list, and packing as HTML (for PDF conversion)
 */
export async function exportPDFHtml(req, res) {
  try {
    const { config, modules = [], colors = {} } = req.body;

    if (!config) {
      return res.status(400).json({ error: 'Configuration requise' });
    }
    const validation = validateConfig(config);
    if (validation.errors.length > 0) {
      return res.status(400).json({ error: 'Configuration invalide', details: validation.errors });
    }

    const cuttingList = generateCuttingList(config, colors, modules);
    const packing = generatePackingList(cuttingList);
    const html = generatePDFHtml(config, modules, cuttingList, packing);

    res.setHeader('Content-Type', 'text/html; charset=utf-8');
    res.send(html);

  } catch (error) {
    console.error('Export PDF error:', error);
    res.status(500).json({ error: error.message || 'Erreur d\'export PDF' });
  }
}

/**
 * POST /api/plans/export-cnc
 * Export CNC program as standard ISO G-code (.nc)
 */
export async function exportCncRoute(req, res) {
  try {
    const { config, modules = [], colors = {} } = req.body;

    if (!config) {
      return res.status(400).json({ error: 'Configuration requise' });
    }
    const validation = validateConfig(config);
    if (validation.errors.length > 0) {
      return res.status(400).json({ error: 'Configuration invalide', details: validation.errors });
    }

    const cnc = generateCncProgram(config, modules, colors);
    res.setHeader('Content-Type', cnc.mimeType);
    res.setHeader('Content-Disposition', `attachment; filename="${cnc.fileName}"`);
    res.send(cnc.content);

  } catch (error) {
    console.error('Export CNC error:', error);
    res.status(500).json({ error: error.message || 'Erreur d\'export CNC' });
  }
}

/**
 * POST /api/plans/export-mpr
 * Archive ZIP avec un fichier .mpr Homag/Woodwop par panneau.
 */
export async function exportMprRoute(req, res) {
  try {
    const { config, modules = [], colors = {}, orderReference = '', stackListKm = '', mprMaterialArticle = '', mprGroupIndex = 1 } = req.body || {};

    if (!config) {
      return res.status(400).json({ error: 'Configuration requise' });
    }
    const validation = validateConfig(config);
    if (validation.errors.length > 0) {
      return res.status(400).json({ error: 'Configuration invalide', details: validation.errors });
    }

    const gi = Number(mprGroupIndex);
    const groupIndex = Number.isFinite(gi) && gi >= 1 ? Math.floor(gi) : 1;

    const { buffer, fileName, mimeType } = await generateMprZipBuffer({
      config,
      modules,
      colors,
      orderReference,
      stackListKm: typeof stackListKm === 'string' ? stackListKm : String(stackListKm || '01'),
      defaultMaterialArticle: typeof mprMaterialArticle === 'string' ? mprMaterialArticle : '',
      groupIndex
    });

    const safeName =
      /^[\w\-_.]+$/.test(String(fileName)) ? fileName : 'apex-mpr.zip';
    res.setHeader('Content-Type', mimeType);
    res.setHeader('Content-Disposition', `attachment; filename="${safeName}"`);
    res.send(Buffer.from(buffer));
  } catch (error) {
    console.error('Export MPR error:', error);
    res.status(500).json({ error: error.message || 'Erreur d\'export MPR' });
  }
}

/**
 * POST /api/plans/export-mpr-piece
 * Export MPR pour une ligne de la liste de débitage (fichier unique ou mini-ZIP si plusieurs exemplaires).
 */
export async function exportMprPieceRoute(req, res) {
  try {
    const {
      config,
      modules = [],
      colors = {},
      pieceId,
      instanceIndex,
      orderReference = '',
      stackListKm = '',
      mprMaterialArticle = '',
      mprGroupIndex = 1
    } = req.body || {};

    if (!config) {
      return res.status(400).json({ error: 'Configuration requise' });
    }
    if (!pieceId || typeof pieceId !== 'string') {
      return res.status(400).json({ error: 'pieceId requis' });
    }
    const validation = validateConfig(config);
    if (validation.errors.length > 0) {
      return res.status(400).json({ error: 'Configuration invalide', details: validation.errors });
    }

    const gi = Number(mprGroupIndex);
    const groupIndex = Number.isFinite(gi) && gi >= 1 ? Math.floor(gi) : 1;

    const { buffer, fileName, mimeType } = await generateMprPieceDownload({
      config,
      modules,
      colors,
      pieceId,
      instanceIndex,
      orderReference,
      stackListKm: typeof stackListKm === 'string' ? stackListKm : String(stackListKm || '01'),
      defaultMaterialArticle: typeof mprMaterialArticle === 'string' ? mprMaterialArticle : '',
      groupIndex
    });

    const safeName = /^[\w\-_.]+$/.test(String(fileName)) ? fileName : 'piece.mpr';
    res.setHeader('Content-Type', mimeType);
    res.setHeader('Content-Disposition', `attachment; filename="${safeName}"`);
    res.send(Buffer.from(buffer));
  } catch (error) {
    console.error('Export MPR piece error:', error);
    const status = /introuvable|requis|invalide/i.test(error.message || '') ? 400 : 500;
    res.status(status).json({ error: error.message || 'Erreur d\'export MPR pièce' });
  }
}

/**
 * POST /api/plans/hardware-list
 * Generate bill of materials for hardware/quincaillerie with prices (best-effort).
 */
export async function generateHardwareListRoute(req, res) {
  try {
    const { config, modules = [], colors = {} } = req.body;

    if (!config) {
      return res.status(400).json({ error: 'Configuration requise' });
    }
    const validation = validateConfig(config);
    if (validation.errors.length > 0) {
      return res.status(400).json({ error: 'Configuration invalide', details: validation.errors });
    }

    const result = await generateHardwareList({ config, modules, colors });
    res.json({ success: true, ...result, warnings: validation.warnings });
  } catch (error) {
    console.error('Hardware list error:', error);
    res.status(500).json({ error: error.message || 'Erreur de génération de la liste de quincaillerie' });
  }
}