/**
 * Matcher - логика сопоставления резюме и вакансии
 */

function extractRequirements(vacancyText) {
  if (!vacancyText || typeof vacancyText !== 'string') {
    return { criteria: [], error: 'Введите текст вакансии' };
  }
  
  const result = window.aiAdapter.generate('extractCriteria', { vacancyText });
  return result;
}

function matchResumeToCriteria(criteria, resumeText) {
  if (!criteria || criteria.length === 0) {
    return { results: [], coverage: 0, error: 'Список критериев пуст' };
  }
  
  if (!resumeText || typeof resumeText !== 'string') {
    return { results: [], coverage: 0, error: 'Введите текст резюме' };
  }
  
  const result = window.aiAdapter.generate('matchResume', { criteria, resumeText });
  return result;
}

function updateCriterionStatus(results, criterionId, newStatus, note) {
  if (!results || !Array.isArray(results)) {
    return results;
  }
  
  return results.map(result => {
    if (result.criterionId === criterionId) {
      return {
        ...result,
        status: newStatus,
        note: note || result.note
      };
    }
    return result;
  });
}

function addCustomCriterion(criteria, label, required, weight, synonyms) {
  const newCriterion = {
    id: `custom-${Date.now()}`,
    label: label.trim(),
    required: required !== false,
    weight: Math.max(1, Math.min(5, parseInt(weight, 10) || 3)),
    synonyms: (synonyms || []).filter(s => s.trim().length > 0),
    category: 'custom'
  };
  
  return [...criteria, newCriterion];
}

function removeCriterion(criteria, criterionId) {
  return criteria.filter(c => c.id !== criterionId);
}

function updateCriterion(criteria, criterionId, updates) {
  return criteria.map(c => {
    if (c.id === criterionId) {
      return { ...c, ...updates };
    }
    return c;
  });
}

function generateInterviewQuestions(matchResults) {
  if (!matchResults || !matchResults.results || matchResults.results.length === 0) {
    return { questions: [] };
  }
  
  const unmatched = matchResults.results.filter(
    r => r.status === 'clarify' || r.status === 'notfound'
  );
  
  if (unmatched.length === 0) {
    return { questions: [] };
  }
  
  const result = window.aiAdapter.generate('generateQuestions', {
    unmatchedCriteria: unmatched
  });
  
  return result;
}

function calculateCoverage(results) {
  if (!results || results.length === 0) {
    return 0;
  }
  
  const totalWeight = results.reduce((sum, r) => sum + (r.weight || 0), 0);
  if (totalWeight === 0) {
    return 0;
  }
  
  const confirmedWeight = results
    .filter(r => r.status === 'confirmed')
    .reduce((sum, r) => sum + (r.weight || 0), 0);
  
  return Math.round((confirmedWeight / totalWeight) * 100);
}

function getStatusStats(results) {
  if (!results || !Array.isArray(results)) {
    return { confirmed: 0, clarify: 0, notfound: 0, total: 0 };
  }
  
  return {
    confirmed: results.filter(r => r.status === 'confirmed').length,
    clarify: results.filter(r => r.status === 'clarify').length,
    notfound: results.filter(r => r.status === 'notfound').length,
    total: results.length
  };
}

function exportSummary(vacancyText, resumeText, criteria, matchResults, questions) {
  const coverage = calculateCoverage(matchResults?.results || []);
  const stats = getStatusStats(matchResults?.results || []);
  
  const summary = {
    exportedAt: new Date().toISOString(),
    vacancy: {
      title: 'Вакансия',
      criteriaCount: criteria?.length || 0
    },
    coverage: {
      percentage: coverage,
      confirmed: stats.confirmed,
      toClarify: stats.clarify,
      notFound: stats.notfound,
      total: stats.total
    },
    results: matchResults?.results?.map(r => ({
      requirement: r.label,
      type: r.required ? 'Обязательное' : 'Желательное',
      weight: r.weight,
      status: getStatusLabel(r.status),
      evidence: r.evidence?.[0] || 'Нет данных'
    })) || [],
    interviewQuestions: questions?.questions?.map(q => ({
      topic: q.label,
      question: q.question,
      followUp: q.followUp
    })) || []
  };
  
  return summary;
}

function getStatusLabel(status) {
  const labels = {
    confirmed: 'Подтверждено',
    clarify: 'Уточнить',
    notfound: 'Не найдено'
  };
  return labels[status] || status;
}

function downloadJSON(data, filename) {
  const json = JSON.stringify(data, null, 2);
  const blob = new Blob([json], { type: 'application/json' });
  const url = URL.createObjectURL(blob);
  const a = document.createElement('a');
  a.href = url;
  a.download = filename;
  document.body.appendChild(a);
  a.click();
  document.body.removeChild(a);
  URL.revokeObjectURL(url);
}

function downloadText(text, filename) {
  const blob = new Blob([text], { type: 'text/plain;charset=utf-8' });
  const url = URL.createObjectURL(blob);
  const a = document.createElement('a');
  a.href = url;
  a.download = filename;
  document.body.appendChild(a);
  a.click();
  document.body.removeChild(a);
  URL.revokeObjectURL(url);
}

function formatExportText(summary) {
  let text = 'HR CANDIDATE MATCHER — СВОДКА\n';
  text += '=' .repeat(50) + '\n\n';
  text += `Дата экспорта: ${new Date(summary.exportedAt).toLocaleString('ru-RU')}\n\n`;
  
  text += 'ПОКРЫТИЕ ТРЕБОВАНИЙ\n';
  text += '-'.repeat(30) + '\n';
  text += `Общее покрытие: ${summary.coverage.percentage}%\n`;
  text += `Подтверждено: ${summary.coverage.confirmed}\n`;
  text += `Требует уточнения: ${summary.coverage.toClarify}\n`;
  text += `Не найдено: ${summary.coverage.notFound}\n`;
  text += `Всего критериев: ${summary.coverage.total}\n\n`;
  
  text += 'РЕЗУЛЬТАТЫ СОПОСТАВЛЕНИЯ\n';
  text += '-'.repeat(30) + '\n';
  summary.results.forEach((r, i) => {
    text += `${i + 1}. ${r.requirement}\n`;
    text += `   Тип: ${r.type}, Вес: ${r.weight}\n`;
    text += `   Статус: ${r.status}\n`;
    text += `   Доказательство: ${r.evidence}\n\n`;
  });
  
  if (summary.interviewQuestions.length > 0) {
    text += 'ВОПРОСЫ ДЛЯ ИНТЕРВЬЮ\n';
    text += '-'.repeat(30) + '\n';
    summary.interviewQuestions.forEach((q, i) => {
      text += `${i + 1}. Тема: ${q.topic}\n`;
      text += `   Вопрос: ${q.question}\n`;
      if (q.followUp && q.followUp.length > 0) {
        text += `   Дополнительные: ${q.followUp.join('; ')}\n`;
      }
      text += '\n';
    });
  }
  
  text += '=' .repeat(50) + '\n';
  text += 'Создано с помощью HR Candidate Matcher\n';
  
  return text;
}

if (typeof module !== 'undefined' && module.exports) {
  module.exports = {
    extractRequirements,
    matchResumeToCriteria,
    updateCriterionStatus,
    addCustomCriterion,
    removeCriterion,
    updateCriterion,
    generateInterviewQuestions,
    calculateCoverage,
    getStatusStats,
    exportSummary,
    downloadJSON,
    downloadText,
    formatExportText
  };
}