/**
 * 批量处理漫画图片，生成对白JSON文件
 * 处理指定目录下的所有图片
 */

import fs from 'fs';
import path from 'path';
import { fileURLToPath } from 'url';
import { detectComicPanels, mergePanelMaskWithTextMask } from '../check-reg.js';
import { ocrComicImage } from '../ocr.js';
import { sortDialoguesByPanels } from '../sort-dialog.js';
import { sortSentenceCharacters } from '../sort-sentence-character.js';
import { generateDialogJson } from '../generate-dialog-json.js';

// ES 模块中获取 __dirname 的兼容方式
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

/**
 * 获取项目根目录
 */
function getProjectRoot() {
  return path.join(__dirname, '..', '..');
}

/**
 * 处理单张图片
 */
function processSingleImage(imagePath, projectRoot, forceReprocess = false) {
  try {
    const imageName = path.basename(imagePath, path.extname(imagePath));
    const imageDir = path.dirname(imagePath);
    const outputDir = path.join(imageDir, 'ocr');
    const tmpDir = path.join(outputDir, 'tmp');
    
    // 确保输出目录和tmp目录存在
    if (!fs.existsSync(outputDir)) {
      fs.mkdirSync(outputDir, { recursive: true });
    }
    if (!fs.existsSync(tmpDir)) {
      fs.mkdirSync(tmpDir, { recursive: true });
    }
    
    // 检查是否已经存在结果文件
    const outputJsonPath = path.join(outputDir, `${imageName}_dialogues.json`);
    
    if (fs.existsSync(outputJsonPath) && !forceReprocess) {
      console.log(`⏭️  跳过 ${path.basename(imagePath)} (已存在结果文件)`);
      return { success: true, skipped: true };
    }
    
    console.log(`\n${'='.repeat(60)}`);
    console.log(`📷 正在处理: ${path.basename(imagePath)}`);
    console.log('='.repeat(60));
    
    // 1. 检测漫画格子
    console.log('🔍 步骤1: 检测漫画格子...');
    const panelResult = detectComicPanels(imagePath, tmpDir, null, projectRoot);
    
    // 读取格子信息
    const panelsJsonPath = path.join(tmpDir, `${imageName}_panels.json`);
    let panels = [];
    if (fs.existsSync(panelsJsonPath)) {
      const panelsContent = fs.readFileSync(panelsJsonPath, 'utf-8');
      const panelsData = JSON.parse(panelsContent);
      panels = panelsData.panels || [];
      console.log(`✅ 读取到 ${panels.length} 个格子`);
    }
    
    const panelMaskPath = path.join(tmpDir, `${imageName}_panel_mask.png`);
    
    // 2. OCR识别文字
    console.log('🔤 步骤2: 识别文字及坐标...');
    const ocrResult = ocrComicImage(imagePath, outputDir, true, true, projectRoot);
    
    // 获取文字遮罩图路径
    const textMaskPath = path.join(tmpDir, `${imageName}_text_mask.png`);
    
    if (!ocrResult.dialogues || ocrResult.dialogues.length === 0) {
      console.log('⚠️  未识别到任何对话');
      return { success: false, error: '未识别到任何对话' };
    }
    
    // 3. 如果格子数量不足，使用文字遮罩图重新检测
    const initialPanelCount = panels.length;
    if (panels.length < 4 && fs.existsSync(textMaskPath)) {
      console.log('🔍 步骤2.5: 使用文字遮罩图重新检测格子...');
      try {
        const panelResultRetry = detectComicPanels(imagePath, tmpDir, textMaskPath, projectRoot);
        if (fs.existsSync(panelsJsonPath)) {
          const panelsContentRetry = fs.readFileSync(panelsJsonPath, 'utf-8');
          const panelsDataRetry = JSON.parse(panelsContentRetry);
          const panelsRetry = panelsDataRetry.panels || [];
          if (panelsRetry.length > initialPanelCount) {
            panels = panelsRetry;
            console.log(`✅ 使用文字遮罩图检测到 ${panels.length} 个格子（之前: ${initialPanelCount} 个）`);
          }
        }
      } catch (error) {
        console.log(`⚠️  使用文字遮罩图重新检测失败: ${error.message}`);
      }
    }
    
    // 4. 合并格子遮罩图和文字遮罩图
    console.log('🔗 步骤3: 合并格子遮罩图和文字遮罩图...');
    if (fs.existsSync(panelMaskPath) && fs.existsSync(textMaskPath)) {
      const combinedMaskPath = path.join(tmpDir, `${imageName}_combined_mask.png`);
      mergePanelMaskWithTextMask(panelMaskPath, textMaskPath, combinedMaskPath, projectRoot);
      console.log(`✅ 已合并遮罩图`);
    }
    
    // 5. 整理句子顺序
    console.log('📋 步骤4: 整理句子顺序...');
    let sortedDialogues = ocrResult.dialogues || [];
    
    // 获取图片尺寸
    let imageWidth = 1334;
    let imageHeight = 1940;
    if (sortedDialogues.length > 0 && sortedDialogues[0].bbox) {
      const firstBbox = sortedDialogues[0].bbox;
      imageWidth = Math.max(imageWidth, firstBbox.x2 || 1334);
      imageHeight = Math.max(imageHeight, firstBbox.y2 || 1940);
    }
    
    // 使用格子排序
    if (panels.length > 0 && sortedDialogues.length > 0) {
      const dialoguesWithBbox = sortedDialogues.filter(d => d.bbox);
      if (dialoguesWithBbox.length > 0) {
        sortedDialogues = sortDialoguesByPanels(
          dialoguesWithBbox,
          panels,
          imageWidth,
          imageHeight
        );
      }
    }
    
    // 6. 整理每个气泡对话框里的文字顺序
    console.log('📝 步骤5: 整理每个气泡对话框里的文字顺序...');
    // 计算实际图片高度（从所有对话的bbox中找到最大的y2值）
    let actualImageHeight = imageHeight;
    if (sortedDialogues.length > 0) {
      const maxY2 = Math.max(...sortedDialogues
        .filter(d => d.bbox && d.bbox.y2)
        .map(d => d.bbox.y2));
      if (maxY2 > 0) {
        actualImageHeight = Math.max(actualImageHeight, maxY2);
      }
    }
    
    const finalDialogues = sortedDialogues.map((dialogue, index) => {
      let sortedText = dialogue.text;
      
      // 使用字符坐标进行排序（如果有的话）
      if (dialogue.character_positions && dialogue.character_positions.length > 0) {
        sortedText = sortSentenceCharacters(dialogue.text, dialogue.bbox, dialogue.character_positions, actualImageHeight);
      } else if (dialogue.bbox) {
        // 回退到基于bbox的排序
        sortedText = sortSentenceCharacters(dialogue.text, dialogue.bbox, null, actualImageHeight);
      }
      
      return {
        order: dialogue.order || index + 1,
        text: sortedText,
        bbox: dialogue.bbox || null,
        character_positions: dialogue.character_positions || null
      };
    });
    
    // 7. 生成对话JSON
    console.log('💾 步骤6: 生成对话JSON...');
    generateDialogJson(finalDialogues, path.basename(imagePath), outputJsonPath);
    
    console.log(`✅ 处理完成: ${path.basename(imagePath)} (${finalDialogues.length} 段对话)`);
    
    return { success: true, dialogues: finalDialogues.length };
  } catch (error) {
    console.error(`❌ 处理失败: ${path.basename(imagePath)} - ${error.message}`);
    return { success: false, error: error.message };
  }
}

/**
 * 批量处理目录下的所有图片
 */
function batchProcessImages() {
  try {
    const projectRoot = getProjectRoot();
    const targetDir = path.join(
      projectRoot,
      'static',
      '漫画',
      'image',
      '鬼-巷第001卷',
      '第一章'
    );
    
    console.log('='.repeat(60));
    console.log('🚀 批量处理漫画图片');
    console.log('='.repeat(60));
    console.log(`📁 目标目录: ${targetDir}`);
    
    if (!fs.existsSync(targetDir)) {
      throw new Error(`目录不存在: ${targetDir}`);
    }
    
    // 读取目录下的所有图片文件
    const files = fs.readdirSync(targetDir);
    const imageExtensions = ['.jpeg', '.jpg', '.png', '.bmp'];
    const imageFiles = files
      .filter(file => {
        const ext = path.extname(file).toLowerCase();
        return imageExtensions.includes(ext);
      })
      .sort() // 按文件名排序
      .map(file => path.join(targetDir, file));
    
    if (imageFiles.length === 0) {
      console.log('⚠️  未找到任何图片文件');
      return;
    }
    
    console.log(`📊 找到 ${imageFiles.length} 张图片\n`);
    
    const forceReprocess = process.env.FORCE_REPROCESS === 'true' || process.argv.includes('--force');
    
    // 统计信息
    let successCount = 0;
    let skipCount = 0;
    let failCount = 0;
    
    // 处理每张图片
    for (let i = 0; i < imageFiles.length; i++) {
      const imagePath = imageFiles[i];
      const result = processSingleImage(imagePath, projectRoot, forceReprocess);
      
      if (result.skipped) {
        skipCount++;
      } else if (result.success) {
        successCount++;
      } else {
        failCount++;
      }
      
      // 显示进度
      console.log(`\n进度: ${i + 1}/${imageFiles.length}`);
    }
    
    // 显示总结
    console.log('\n' + '='.repeat(60));
    console.log('📊 处理完成统计');
    console.log('='.repeat(60));
    console.log(`✅ 成功: ${successCount} 张`);
    console.log(`⏭️  跳过: ${skipCount} 张`);
    console.log(`❌ 失败: ${failCount} 张`);
    console.log(`📁 总计: ${imageFiles.length} 张`);
    console.log('='.repeat(60));
  } catch (error) {
    console.error('\n' + '='.repeat(60));
    console.error('❌ 批量处理失败:', error.message);
    console.error('='.repeat(60));
    throw error;
  }
}

// 如果直接运行此脚本
if (import.meta.url === `file://${process.argv[1]}` || process.argv[1]?.endsWith('generate-subtitle.js')) {
  batchProcessImages();
}

export { batchProcessImages, processSingleImage };