const fs = require('fs');
const path = require('path');
const { extractTextFromImage, uploadImageToHosting } = require('./imageProcessor');

async function extractTextFromBuffer(imageBuffer) {
  try {
    console.log('🖼️ DEBUG extractTextFromBuffer: Membuat file temporary');
    const tempPath = path.join(__dirname, `temp_${Date.now()}.jpg`);
    fs.writeFileSync(tempPath, imageBuffer);
    console.log('📁 DEBUG: File temporary dibuat:', tempPath);
    
    const result = await extractTextFromImage(tempPath);
    console.log('✅ DEBUG extractTextFromBuffer: Hasil ekstraksi:', result);
    
    fs.unlinkSync(tempPath);
    console.log('🧹 DEBUG: File temporary dihapus');
    
    return result;
  } catch (error) {
    console.error('❌ DEBUG extractTextFromBuffer Error:', error.message);
    return { status: false, response: 'Gagal memproses gambar' };
  }
}

function mapAnswer(soalArray, jawaban, botIndex) {
  console.log(`🤖 DEBUG mapAnswer: Bot ${botIndex}, Jawaban: "${jawaban}"`);
  return jawaban;
}

function normalizeText(text) {
  const normalized = text.toLowerCase().replace(/[^\w\s]/g, '').trim();
  console.log(`🔤 DEBUG normalizeText: "${text}" -> "${normalized}"`);
  return normalized;
}

function isValueMatch(value, targetSoal) {
  console.log(`🔍 DEBUG isValueMatch: Value="${value}", Soal="${targetSoal}"`);

  const numberMap = {
    '0': 'zero', '1': 'one', '2': 'two', '3': 'three', '4': 'four',
    '5': 'five', '6': 'six', '7': 'seven', '8': 'eight', '9': 'nine', '10': 'ten',
    'zero': '0', 'one': '1', 'two': '2', 'three': '3', 'four': '4',
    'five': '5', 'six': '6', 'seven': '7', 'eight': '8', 'nine': '9', 'ten': '10',
    'I': '1', 'II': '2', 'III': '3', 'IV': '4', 'V': '5',
    'VI': '6', 'VII': '7', 'VIII': '8', 'IX': '9', 'X': '10',
    'i': '1', 'ii': '2', 'iii': '3', 'iv': '4', 'v': '5',
    'vi': '6', 'vii': '7', 'viii': '8', 'ix': '9', 'x': '10',
    'slx': '6', 's1x': '6', 'six': '6',
    'f0ur': '4', 'f0r': '4', 'fuor': '4',
    'f1ve': '5', 'fiv': '5', 'f1v': '5',
    'e1ght': '8', 'elght': '8', 'eight': '8',
    'n1ne': '9', 'n1n': '9', 'nne': '9',
    'se7en': '7', 'sven': '7', 'seven': '7',
    'thre': '3', 'tree': '3', 'thr33': '3',
    'tw0': '2', 'to': '2', 'tw': '2',
    '0ne': '1', 'on': '1', 'oen': '1'
  };

  const leetMap = {
    'O': '0', 'o': '0',
    'I': '1', 'i': '1', 'l': '1',
    'Z': '2', 'z': '2',
    'E': '3', 'e': '3',
    'A': '4', 'a': '4',
    'S': '5', 's': '5',
    'G': '6', 'g': '6',
    'T': '7', 't': '7',
    'B': '8', 'b': '8',
    'Q': '9', 'q': '9',
    'U': '4', 'u': '4',
    'R': '2', 'r': '2',
    'N': '9', 'n': '9',
    'V': '7', 'v': '7'
  };

  const normalizedValue = normalizeText(value);
  const normalizedSoal = normalizeText(targetSoal);

  if (normalizedValue === normalizedSoal) {
    console.log('✅ DEBUG: Match exact normalized');
    return true;
  }

  const convertLeet = (text) => {
    return text.split('').map(char => leetMap[char] || char).join('');
  };

  const leetValue = convertLeet(value);
  const leetSoal = convertLeet(targetSoal);

  console.log(`🔢 DEBUG Leet: Value="${leetValue}", Soal="${leetSoal}"`);

  if (leetValue === normalizedSoal) {
    console.log('✅ DEBUG: Match leet value -> normalized soal');
    return true;
  }
  if (normalizedValue === leetSoal) {
    console.log('✅ DEBUG: Match normalized value -> leet soal');
    return true;
  }
  if (leetValue === leetSoal) {
    console.log('✅ DEBUG: Match leet value -> leet soal');
    return true;
  }

  const mappedValue = numberMap[normalizedValue] || numberMap[value] || normalizedValue;
  const mappedSoal = numberMap[normalizedSoal] || numberMap[targetSoal] || normalizedSoal;

  console.log(`🔄 DEBUG Number Map: Value="${mappedValue}", Soal="${mappedSoal}"`);

  if (mappedValue === normalizedSoal) {
    console.log('✅ DEBUG: Match mapped value -> normalized soal');
    return true;
  }
  if (normalizedValue === mappedSoal) {
    console.log('✅ DEBUG: Match normalized value -> mapped soal');
    return true;
  }
  if (mappedValue === mappedSoal) {
    console.log('✅ DEBUG: Match mapped value -> mapped soal');
    return true;
  }

  const similarity = calculateSimilarity(normalizedValue, normalizedSoal);
  console.log(`📊 DEBUG Similarity: ${similarity}`);
  if (similarity >= 0.8) {
    console.log('✅ DEBUG: Match similarity >= 0.8');
    return true;
  }

  try {
    const valueResult = evaluateSimpleMath(value);
    const soalResult = evaluateSimpleMath(targetSoal);
    console.log(`🧮 DEBUG Math: Value=${valueResult}, Soal=${soalResult}`);
    if (valueResult !== null && soalResult !== null && valueResult === soalResult) {
      console.log('✅ DEBUG: Match math evaluation');
      return true;
    }
  } catch (e) {
    console.log('❌ DEBUG Math evaluation failed');
  }

  console.log('❌ DEBUG: No match found');
  return false;
}

function calculateSimilarity(str1, str2) {
  if (str1 === str2) return 1;
  if (str1.length === 0 || str2.length === 0) return 0;
  
  const longer = str1.length > str2.length ? str1 : str2;
  const shorter = str1.length > str2.length ? str2 : str1;
  
  if (longer.includes(shorter)) return shorter.length / longer.length;
  
  let matches = 0;
  for (let i = 0; i < shorter.length; i++) {
    if (shorter[i] === longer[i]) matches++;
  }
  
  return matches / longer.length;
}

function evaluateSimpleMath(expression) {
  if (!expression) return null;
  const cleanExpr = expression.toString().replace(/[^\d+\-*/.()]/g, '');
  if (!cleanExpr) return null;
  try {
    if (cleanExpr.length > 10) return null;
    const result = Function(`"use strict"; return (${cleanExpr})`)();
    return typeof result === 'number' ? result : null;
  } catch (e) {
    return null;
  }
}

function parseSoalText(text) {
  console.log(`📝 DEBUG parseSoalText: Input text: "${text}"`);
  
  const ignoreWords = [
    'hi', 'how', 'are', 'you', 'hello', 'hey',
    'tentu', 'berikut', 'adalah', 'teks', 'dari', 'gambar', 
    'dipisahkan', 'sesuai', 'permintaan', 'anda', 'hanya',
    'berikan', 'jangan', 'tambahkan', 'kata', 'apapun', 'seperti',
    'atau', 'penjelasan', 'lain', 'saja'
  ];
  
  const delimiters = /[.,:;\\/\s]+/;
  let parts = text.split(delimiters)
    .filter(part => part.trim() !== '')
    .filter(part => !ignoreWords.includes(part.toLowerCase()));
  
  if (parts.length === 0) {
    parts = text.split(/\s+/)
      .filter(part => part.trim() !== '')
      .filter(part => !ignoreWords.includes(part.toLowerCase()));
  }
  
  parts = parts.filter(part => part.length <= 3 || !isNaN(part));
  
  parts = parts.slice(0, 3);
  
  console.log(`📝 DEBUG parseSoalText: Filtered parts (max 3):`, parts);
  return parts;
}

async function antibot(data) {
  console.log('🚀 DEBUG antibot: Memulai proses antibot');
  console.log('📊 DEBUG: Data received - main:', data.main ? '✅' : '❌', 'bots:', data.bots?.length || 0);
  
  try {
    const { main, bots } = data;

    console.log('🖼️ DEBUG: Processing main image...');
    const mainBuffer = Buffer.from(main, 'base64');
    const mainText = await extractTextFromBuffer(mainBuffer);
    
    console.log('📄 DEBUG Main Text Result:', mainText);
    
    if (!mainText.status) {
      throw new Error('Gagal mengekstrak teks dari gambar utama: ' + mainText.response);
    }

    const soalArray = parseSoalText(mainText.response);
    console.log(`📋 DEBUG: Soal array:`, soalArray);
    
    if (soalArray.length === 0) {
      throw new Error('Tidak ada soal yang terdeteksi');
    }

    const botResults = [];
    console.log(`🤖 DEBUG: Processing ${bots.length} bots...`);
    
    for (let i = 0; i < bots.length; i++) {
      const bot = bots[i];
      console.log(`🤖 DEBUG: Processing bot ${i+1}/${bots.length} - ID: ${bot.id}`);
      try {
        const botBuffer = Buffer.from(bot.img, 'base64');
        const botText = await extractTextFromBuffer(botBuffer);
        const mappedValue = mapAnswer(soalArray, botText.response, i);
        
        botResults.push({
          id: bot.id,
          text: botText.response,
          value: mappedValue,
          normalized: normalizeText(botText.response)
        });
        
        console.log(`✅ DEBUG Bot ${bot.id}:`, {
          text: botText.response,
          value: mappedValue,
          normalized: normalizeText(botText.response)
        });
        
      } catch (error) {
        console.error(`❌ DEBUG Bot ${bot.id} Error:`, error.message);
        botResults.push({
          id: bot.id,
          text: '',
          value: '',
          normalized: '',
          error: error.message
        });
      }
    }

    console.log('🔍 DEBUG: Starting matching process...');
    const result = [];
    const usedIds = new Set();
    let successfulMatches = 0;

    // Step 1: Match setiap bot dengan soal yang tersedia
    const availableSoal = [...soalArray];
    
    for (const bot of botResults) {
      let matchedSoal = null;
      let matchIndex = -1;

      if (bot.value && bot.value.trim() !== '') {
        for (let i = 0; i < availableSoal.length; i++) {
          if (isValueMatch(bot.value, availableSoal[i])) {
            matchedSoal = availableSoal[i];
            matchIndex = i;
            successfulMatches++;
            console.log(`✅ DEBUG: Bot ${bot.id} matched with soal "${matchedSoal}"`);
            break;
          }
        }
      }

      if (matchedSoal) {
        result.push({
          id: bot.id,
          soal: matchedSoal,
          matchType: 'exact'
        });
        availableSoal.splice(matchIndex, 1);
        usedIds.add(bot.id);
      } else {
        result.push({
          id: null,
          soal: '',
          matchType: 'none'
        });
      }
    }

    console.log(`📊 DEBUG: Successful matches: ${successfulMatches}`);

    // Step 2: Jika minimal 2 match, isi bot yang belum match dengan soal tersisa
    if (successfulMatches >= 2) {
      console.log('✅ DEBUG: Minimal 2 match terpenuhi, mengisi bot yang belum match');
      for (let i = 0; i < result.length; i++) {
        if (!result[i].id && availableSoal.length > 0) {
          const bot = botResults[i];
          result[i].id = bot.id;
          result[i].soal = availableSoal.shift();
          result[i].matchType = 'fallback';
          console.log(`🔄 DEBUG: Bot ${bot.id} diisi dengan soal tersisa`);
        }
      }
    }

    // Step 3: Handle remaining cases
    for (let i = 0; i < result.length; i++) {
      if (!result[i].id) {
        if (successfulMatches >= 2) {
          result[i].id = botResults[i].id;
          result[i].matchType = 'qualified';
        } else {
          result[i].id = 'invalid';
          result[i].matchType = 'invalid';
        }
      }
    }

    console.log('🎉 DEBUG: Process completed successfully');
    console.log('📋 DEBUG Final Result:', result);

    return {
      success: true,
      data: {
        soal: soalArray,
        soalLeet: soalArray,
        botResults: botResults,
        result: result.map(r => ({ id: r.id })),
        debug: {
          parsedSoal: soalArray,
          matches: result.map(r => ({ 
            id: r.id, 
            matchType: r.matchType, 
            soal: r.soal 
          })),
          totalResults: result.length,
          successfulMatches: successfulMatches
        }
      }
    };

  } catch (error) {
    console.error('💥 DEBUG antibot Error:', error.message);
    return {
      success: false,
      error: error.message,
      data: {
        soal: [],
        botResults: [],
        result: []
      }
    };
  }
}

module.exports = antibot;